/**
 * ToolBox Pro - Main Stylesheet
 */

/* ===========================================
   CSS Variables - Design Tokens
   =========================================== */
:root {
    /* === Marca / acentos === */
    --color-primary: #2F6BFF;          /* azul principal (CTAs, links, focus) */
    --color-primary-dark: #1E4FD8;
    --color-primary-light: #6E9BFF;    /* azul claro (texto sobre navy) */
    --color-secondary: #22D3C5;        /* teal secundario */
    --color-accent: #22D3C5;
    --color-warning: #F59E0B;
    --color-danger: #EF4444;

    /* === Escala de grises (fría, Daylight) === */
    --color-gray-50: #F4F6FB;
    --color-gray-100: #EEF1F8;
    --color-gray-200: #E4E8F0;
    --color-gray-300: #D3DAE6;
    --color-gray-400: #9AA3B8;
    --color-gray-500: #5B6478;
    --color-gray-600: #454E63;
    --color-gray-700: #2C3346;
    --color-gray-800: #1A2030;
    --color-gray-900: #111725;

    /* === Superficies claras === */
    --color-bg: #FFFFFF;               /* superficies / cards */
    --color-bg-secondary: #F4F6FB;     /* fondo app */
    --color-text: #111725;
    --color-text-secondary: #5B6478;
    --color-border: #E4E8F0;

    /* === Navy (zonas oscuras branded) === */
    --ink: #0A1024;                    /* navy base zona tool / bandas */
    --ink-2: #0E1730;                  /* navy card */
    --ink-3: #12203F;                  /* navy elevado */
    --d-stroke: rgba(255,255,255,.10); /* bordes sobre navy */
    --d-muted: #93A0C0;                /* texto secundario sobre navy */

    /* === Gradiente de marca === */
    --grad-brand: linear-gradient(135deg, var(--color-primary), var(--color-secondary));

    /* === Tipografía === */
    --font-family: 'Sora', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-family-mono: 'JetBrains Mono', 'Fira Code', Consolas, monospace;

    /* Alias por compatibilidad con reglas existentes que referencian estos nombres */
    --font-mono: var(--font-family-mono);
    --color-success: var(--color-secondary);

    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;

    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;

    /* Spacing */
    --spacing-1: 0.25rem;
    --spacing-2: 0.5rem;
    --spacing-3: 0.75rem;
    --spacing-4: 1rem;
    --spacing-5: 1.25rem;
    --spacing-6: 1.5rem;
    --spacing-8: 2rem;
    --spacing-10: 2.5rem;
    --spacing-12: 3rem;
    --spacing-16: 4rem;

    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;
    --radius-xl: 0.75rem;
    --radius-2xl: 1rem;
    --radius-full: 9999px;

    /* Shadows (Daylight: suaves en claro, profundas bajo navy) */
    --shadow-sm: 0 1px 2px 0 rgb(10 16 36 / 0.04);
    --shadow-md: 0 10px 34px rgb(10 16 36 / 0.06);
    --shadow-lg: 0 18px 50px rgb(10 16 36 / 0.10);
    --shadow-xl: 0 40px 90px rgb(0 0 0 / 0.45);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;

    /* Layout */
    --container-max: 1280px;
    --sidebar-width: 300px;
    --header-height: 72px;
}

/* ===========================================
   Base Styles
   =========================================== */
*, *::before, *::after {
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: var(--line-height-normal);
    color: var(--color-text);
    background-color: var(--color-bg);
    margin: 0;
    padding: 0;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===========================================
   Typography
   =========================================== */
h1, h2, h3, h4, h5, h6 {
    margin: 0 0 var(--spacing-4);
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-tight);
    color: var(--color-text);
}

h1 { font-size: var(--font-size-4xl); }
h2 { font-size: var(--font-size-3xl); }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }
h5 { font-size: var(--font-size-lg); }
h6 { font-size: var(--font-size-base); }

p {
    margin: 0 0 var(--spacing-4);
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-primary-dark);
}

/* ===========================================
   Layout
   =========================================== */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--spacing-4);
}

.section {
    padding: var(--spacing-16) 0;
}

.section--alt {
    background-color: var(--color-bg-secondary);
}

.section__header {
    text-align: center;
    margin-bottom: var(--spacing-10);
}

.section__title {
    margin-bottom: var(--spacing-2);
}

.section__subtitle {
    color: var(--color-text-secondary);
    font-size: var(--font-size-lg);
    margin: 0;
}

.section__link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-1);
    font-weight: var(--font-weight-medium);
}

/* ===========================================
   Header
   =========================================== */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    /* Look navy de la demo Daylight (nav oscuro sobre app clara) */
    background: var(--ink);
    color: #fff;
    border-bottom: 1px solid var(--d-stroke);
    height: var(--header-height);
    padding-top: 10px;
}

/* Sombra sutil al hacer scroll, coherente con el navy */
.header.scrolled {
    box-shadow: var(--shadow-md);
}

.header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    gap: var(--spacing-8);
}

.header__logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: #fff;
}

.header__logo-icon {
    width: 36px;
    height: 36px;
    /* Cuadrito con gradiente de marca sobre el navy */
    background: var(--grad-brand);
    color: #fff;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-sm);
}

.header__logo-text {
    color: #fff;
}

.header__logo-accent {
    color: var(--color-primary-light);
}

.header__nav {
    display: none;
}

.header__nav-list {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    list-style: none;
    margin: 0;
    padding: 0;
}

.header__nav-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-3) var(--spacing-4);
    color: var(--d-muted);
    font-weight: var(--font-weight-medium);
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
}

.header__nav-link:hover,
.header__nav-link:focus {
    color: #fff;
    background: var(--d-stroke);
}

.header__actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
}

.header__action-btn {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: none;
    border: none;
    color: var(--d-muted);
    cursor: pointer;
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
}

.header__action-btn:hover {
    background: var(--d-stroke);
    color: #fff;
}

.header__menu-toggle {
    display: flex;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    padding: var(--spacing-2);
    cursor: pointer;
}

.header__menu-toggle span {
    width: 24px;
    height: 2px;
    background: #fff;
    border-radius: 2px;
    transition: all var(--transition-fast);
}

/* Dropdown */
.header__dropdown {
    display: none;
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--ink-2);
    border: 1px solid var(--d-stroke);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    padding: var(--spacing-4);
    min-width: 400px;
}

.header__nav-item--dropdown:hover .header__dropdown {
    display: block;
}

.header__dropdown-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-2);
}

.header__dropdown-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    padding: var(--spacing-3);
    border-radius: var(--radius-lg);
    color: #fff;
    transition: background var(--transition-fast);
}

.header__dropdown-item:hover {
    background: var(--d-stroke);
}

.header__dropdown-footer {
    margin-top: var(--spacing-4);
    padding-top: var(--spacing-4);
    border-top: 1px solid var(--d-stroke);
    text-align: center;
}

/* Botón outline adaptado a la zona navy del dropdown */
.header__dropdown-footer .btn--outline {
    background: transparent;
    color: #fff;
    border-color: var(--d-stroke);
}
.header__dropdown-footer .btn--outline:hover {
    background: var(--d-stroke);
    border-color: var(--color-primary-light);
    color: var(--color-primary-light);
}

/* ===========================================
   Buttons
   =========================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    padding: var(--spacing-2) var(--spacing-4);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    font-family: inherit;
    border-radius: var(--radius-lg);
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.btn--primary {
    background: var(--color-primary);
    color: #fff;
    /* Sombra azul derivada del primary (47 107 255) */
    box-shadow: 0 8px 20px rgb(47 107 255 / .25);
    /* Solo animamos transform/box-shadow: barato en el hover */
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.btn--primary:hover {
    background: var(--color-primary);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 12px 26px rgb(47 107 255 / .32);
}

.btn--secondary {
    background: var(--color-bg-secondary);
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

.btn--secondary:hover {
    background: var(--color-gray-200);
}

.btn--outline {
    background: var(--color-bg);
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

.btn--outline:hover {
    background: var(--color-bg);
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.btn--danger {
    background: var(--color-danger);
    color: white;
}

.btn--sm {
    padding: var(--spacing-1) var(--spacing-3);
    font-size: var(--font-size-xs);
}

.btn--lg {
    padding: var(--spacing-3) var(--spacing-6);
    font-size: var(--font-size-base);
}

.btn--icon {
    width: 40px;
    height: 40px;
    padding: 0;
}

/* ===========================================
   Forms
   =========================================== */
.form-group {
    margin-bottom: var(--spacing-4);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-2);
    font-weight: var(--font-weight-medium);
    font-size: var(--font-size-sm);
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: var(--spacing-3) var(--spacing-4);
    font-size: var(--font-size-base);
    font-family: inherit;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    color: var(--color-text);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgb(47 107 255 / 0.1);
}

.form-textarea {
    min-height: 150px;
    resize: vertical;
}

/* ===========================================
   Cards
   =========================================== */
.card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-6);
    box-shadow: var(--shadow-md);
}

/* Tool Card */
.tool-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-md);
    overflow: hidden;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
}

.tool-card:hover {
    transform: translateY(-3px);
    border-color: var(--color-primary);
    box-shadow: var(--shadow-lg);
}

.tool-card__link {
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
    padding: var(--spacing-4);
    color: var(--color-text);
}

.tool-card__icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-lg);
    flex-shrink: 0;
}

.tool-card__content {
    flex: 1;
    min-width: 0;
}

.tool-card__title {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    margin: 0 0 var(--spacing-1);
}

.tool-card__description {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin: 0;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.tool-card__arrow {
    color: var(--color-gray-400);
    transition: transform var(--transition-fast);
}

.tool-card:hover .tool-card__arrow {
    transform: translateX(4px);
    color: var(--color-primary);
}

/* Tools Grid */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-4);
}

/* Category Card */
.category-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: var(--spacing-6);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-md);
    color: var(--color-text);
    transition: all var(--transition-normal);
}

.category-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
    /* Acento teal de la demo para categorías */
    border-color: var(--color-secondary);
}

.category-card__icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-xl);
    margin-bottom: var(--spacing-4);
}

.category-card__title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    margin: 0 0 var(--spacing-1);
}

.category-card__count {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin: 0;
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--spacing-4);
}

/* Feature Card */
.feature-card {
    text-align: center;
    padding: var(--spacing-6);
}

.feature-card__icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary);
    color: white;
    border-radius: var(--radius-xl);
    margin: 0 auto var(--spacing-4);
}

.feature-card__title {
    font-size: var(--font-size-lg);
    margin: 0 0 var(--spacing-2);
}

.feature-card__text {
    color: var(--color-text-secondary);
    margin: 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-6);
}

/* ===========================================
   Home: Hero
   =========================================== */
.hero {
    padding: var(--spacing-16) 0;
    text-align: center;
    /* Zona clara: fondo sutil hacia superficie blanca */
    background: linear-gradient(180deg, var(--color-bg-secondary) 0%, var(--color-bg) 100%);
}

/* Chip/kicker mono arriba del h1 */
.hero__chip {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-2);
    font-family: var(--font-family-mono);
    font-size: 0.8125rem;
    color: var(--color-primary);
    background: rgb(47 107 255 / 0.08);
    border: 1px solid rgb(47 107 255 / 0.22);
    border-radius: var(--radius-full);
    padding: var(--spacing-2) var(--spacing-4);
    margin-bottom: var(--spacing-6);
}

.hero__title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    margin-bottom: var(--spacing-4);
    letter-spacing: -0.03em;
}

/* Ultima palabra del h1 en gradiente de marca */
.hero__highlight {
    color: var(--color-primary); /* fallback: si background-clip:text no aplica, la palabra del H1 queda azul (nunca invisible) */
    background: var(--grad-brand);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero__subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto var(--spacing-8);
}

.hero__actions {
    display: flex;
    justify-content: center;
    gap: var(--spacing-4);
    flex-wrap: wrap;
}

/* Barra de metricas del hero */
.hero__stats {
    display: flex;
    justify-content: center;
    max-width: 640px;
    margin: var(--spacing-12) auto 0;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-md);
    overflow: hidden;
}

.hero__stat {
    flex: 1;
    padding: var(--spacing-6) var(--spacing-4);
    border-right: 1px solid var(--color-border);
}

.hero__stat:last-child {
    border-right: none;
}

.hero__stat-num {
    display: block;
    font-family: var(--font-family-mono);
    font-size: clamp(1.5rem, 4vw, 2.125rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--color-primary);
    line-height: 1.1;
}

.hero__stat-num--teal {
    color: var(--color-secondary);
}

.hero__stat-label {
    display: block;
    margin-top: var(--spacing-1);
    font-family: var(--font-family-mono);
    font-size: 0.78125rem;
    color: var(--color-text-secondary);
}

/* ===========================================
   Home: Why (banda navy)
   =========================================== */
.why {
    position: relative;
    overflow: hidden;
    background: var(--ink);
    border-radius: var(--radius-2xl);
    /* Textura de grilla sutil enmascarada, como en la demo */
}

/* Grilla sutil sobre navy */
.why::before {
    content: "";
    position: absolute;
    inset: 0;
    pointer-events: none;
    background-image:
        linear-gradient(rgb(255 255 255 / 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgb(255 255 255 / 0.04) 1px, transparent 1px);
    background-size: 46px 46px;
    -webkit-mask-image: radial-gradient(ellipse 70% 100% at 100% 0, #000, transparent 70%);
    mask-image: radial-gradient(ellipse 70% 100% at 100% 0, #000, transparent 70%);
}

/* Glow azul radial */
.why::after {
    content: "";
    position: absolute;
    width: 420px;
    height: 420px;
    top: -160px;
    right: -80px;
    border-radius: 50%;
    background: radial-gradient(circle, rgb(47 107 255 / 0.28), transparent 62%);
    filter: blur(20px);
    pointer-events: none;
}

.why > .container {
    position: relative;
    z-index: 1;
}

/* Titulo de la banda en claro sobre navy */
.why .section__title {
    color: #fff;
}

/* Feature cards glass dentro de la banda navy */
.why .feature-card {
    text-align: left;
    background: var(--ink-2);
    border: 1px solid var(--d-stroke);
    border-radius: var(--radius-xl);
    padding: var(--spacing-6);
    transition: border-color 0.25s ease, background 0.25s ease, transform 0.25s ease;
}

.why .feature-card:hover {
    border-color: var(--color-primary-light);
    background: var(--ink-3);
    transform: translateY(-3px);
}

.why .feature-card__icon {
    margin: 0 0 var(--spacing-4);
    background: var(--grad-brand);
    color: #fff;
}

.why .feature-card__title {
    color: #fff;
}

.why .feature-card__text {
    color: var(--d-muted);
}

/* ===========================================
   Home: CTA Final (navy)
   =========================================== */
.cta-final {
    padding: var(--spacing-12) 0;
}

.cta-final__inner {
    position: relative;
    overflow: hidden;
    text-align: center;
    background: var(--ink-2);
    border: 1px solid var(--d-stroke);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-16) var(--spacing-8);
}

/* Glow azul radial superior */
.cta-final__inner::before {
    content: "";
    position: absolute;
    width: 400px;
    height: 400px;
    top: -180px;
    left: 50%;
    transform: translateX(-50%);
    border-radius: 50%;
    background: radial-gradient(circle, rgb(47 107 255 / 0.4), transparent 60%);
    filter: blur(20px);
    pointer-events: none;
}

.cta-final__title {
    position: relative;
    z-index: 1;
    color: #fff;
    letter-spacing: -0.03em;
    margin-bottom: var(--spacing-3);
}

.cta-final__text {
    position: relative;
    z-index: 1;
    color: var(--d-muted);
    max-width: 44ch;
    margin: 0 auto var(--spacing-8);
}

.cta-final .btn {
    position: relative;
    z-index: 1;
}

/* ===========================================
   Footer
   =========================================== */
.footer {
    /* Footer navy: cierra el sitio en oscuro, como la demo */
    background: var(--ink);
    color: var(--d-muted);
    padding: var(--spacing-16) 0 var(--spacing-8);
    border-top: 1px solid var(--d-stroke);
}

.footer__grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
    gap: var(--spacing-8);
    margin-bottom: var(--spacing-8);
}

.footer__logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: #fff;
    margin-bottom: var(--spacing-4);
}

.footer__logo-icon {
    width: 36px;
    height: 36px;
    background: var(--grad-brand);
    color: #fff;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-sm);
}

.footer__tagline {
    color: var(--d-muted);
    margin-bottom: var(--spacing-2);
}

.footer__description {
    color: var(--d-muted);
    font-size: var(--font-size-sm);
}

.footer__title {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #fff;
    margin-bottom: var(--spacing-4);
}

.footer__list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer__list li {
    margin-bottom: var(--spacing-2);
}

.footer__list a {
    color: var(--d-muted);
    font-size: var(--font-size-sm);
}

.footer__list a:hover {
    color: var(--color-primary-light);
}

.footer__bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-8);
    border-top: 1px solid var(--d-stroke);
}

.footer__copyright {
    color: var(--d-muted);
    font-size: var(--font-size-sm);
    margin: 0;
}

.footer__social {
    display: flex;
    gap: var(--spacing-4);
}

.footer__social a {
    color: var(--d-muted);
}

.footer__social a:hover {
    color: var(--color-primary-light);
}

/* ===========================================
   Breadcrumbs
   =========================================== */
.breadcrumbs {
    padding: var(--spacing-4) 0;
}

.breadcrumbs__list {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-2);
    list-style: none;
    margin: 0;
    padding: 0;
    font-size: var(--font-size-sm);
}

.breadcrumbs__link {
    color: var(--color-text-secondary);
}

.breadcrumbs__link:hover {
    color: var(--color-primary);
}

.breadcrumbs__separator {
    color: var(--color-gray-400);
}

.breadcrumbs__current {
    color: var(--color-text);
    font-weight: var(--font-weight-medium);
}

/* ===========================================
   Alerts
   =========================================== */
.alert {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    padding: var(--spacing-3) var(--spacing-4);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-4);
}

.alert--success {
    background: #ecfdf5;
    color: #065f46;
    border: 1px solid #a7f3d0;
}

.alert--danger {
    background: #fef2f2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

.alert--warning {
    background: #fffbeb;
    color: #92400e;
    border: 1px solid #fde68a;
}

.alert--info {
    background: #eff6ff;
    color: #1e40af;
    border: 1px solid #bfdbfe;
}

/* ===========================================
   Skip Link (Accessibility)
   =========================================== */
.skip-link {
    position: absolute;
    top: -100%;
    left: 0;
    background: var(--color-primary);
    color: white;
    padding: var(--spacing-2) var(--spacing-4);
    z-index: 1000;
}

.skip-link:focus {
    top: 0;
}

/* ===========================================
   Search Overlay
   =========================================== */
.search-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 200;
    align-items: flex-start;
    justify-content: center;
    padding-top: 20vh;
}

.search-overlay.active {
    display: flex;
}

.search-overlay__inner {
    background: var(--color-bg);
    border-radius: var(--radius-xl);
    padding: var(--spacing-4);
    width: 100%;
    max-width: 600px;
    margin: var(--spacing-4);
    box-shadow: var(--shadow-xl);
}

.search-form {
    display: flex;
    gap: var(--spacing-2);
}

.search-form__input {
    flex: 1;
    padding: var(--spacing-3) var(--spacing-4);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-lg);
    background: var(--color-bg);
    color: var(--color-text);
}

.search-form__input:focus {
    outline: none;
    border-color: var(--color-primary);
}

.search-form__btn {
    padding: var(--spacing-3) var(--spacing-4);
    background: var(--color-primary);
    color: white;
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
}

.search-overlay__close {
    position: absolute;
    top: var(--spacing-4);
    right: var(--spacing-4);
    background: none;
    border: none;
    color: white;
    cursor: pointer;
}

/* ===========================================
   Responsive
   =========================================== */
@media (min-width: 768px) {
    .header__nav {
        display: block;
    }

    .header__menu-toggle {
        display: none;
    }

    .header__nav-item--dropdown {
        position: relative;
    }
}

@media (max-width: 767px) {
    .header__nav {
        display: none;
        position: absolute;
        top: var(--header-height);
        left: 0;
        right: 0;
        background: var(--ink);
        border-bottom: 1px solid var(--d-stroke);
        padding: var(--spacing-4);
    }

    .header__nav.active {
        display: block;
    }

    .header__nav-list {
        flex-direction: column;
        align-items: stretch;
    }

    .footer__grid {
        grid-template-columns: 1fr;
    }

    .footer__bottom {
        flex-direction: column;
        gap: var(--spacing-4);
        text-align: center;
    }
}

/* ===========================================
   Page Header
   =========================================== */
.page-header {
    padding: var(--spacing-8) 0;
    text-align: center;
    background: var(--color-bg-secondary);
}

.page-header__icon {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-xl);
    margin: 0 auto var(--spacing-4);
}

.page-header__title {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    margin: 0 0 var(--spacing-2);
}

.page-header__subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ===========================================
   Category Filter
   =========================================== */
.category-filter {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-2);
    justify-content: center;
}

.category-filter__item {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-2) var(--spacing-4);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    transition: all var(--transition-fast);
}

.category-filter__item:hover {
    border-color: var(--cat-color, var(--color-primary));
    color: var(--cat-color, var(--color-primary));
}

.category-filter__item--active {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: white;
}

.category-filter__count {
    background: rgba(0,0,0,0.1);
    padding: 2px 8px;
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
}

/* ===========================================
   Empty State
   =========================================== */
.empty-state {
    text-align: center;
    padding: var(--spacing-16) var(--spacing-4);
}

.empty-state__icon {
    color: var(--color-gray-400);
    margin-bottom: var(--spacing-4);
}

.empty-state__title {
    font-size: var(--font-size-xl);
    margin: 0 0 var(--spacing-2);
}

.empty-state__text {
    color: var(--color-text-secondary);
    margin: 0 0 var(--spacing-6);
}

/* ===========================================
   Category Card Variants
   =========================================== */
.categories-grid--compact {
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
}

.category-card--small {
    flex-direction: row;
    padding: var(--spacing-3) var(--spacing-4);
    gap: var(--spacing-3);
}

.category-card--small .category-card__icon {
    width: 40px;
    height: 40px;
    margin-bottom: 0;
}

.category-card--small .category-card__title {
    font-size: var(--font-size-sm);
    flex: 1;
    text-align: left;
    margin: 0;
}

.category-card--small .category-card__count {
    background: var(--color-bg-secondary);
    padding: 2px 8px;
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
}

/* ===========================================
   Section Header with Icon
   =========================================== */
.section__header-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
}

.section__icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-lg);
}

/* ===========================================
   Section Compact
   =========================================== */
.section--compact {
    padding: var(--spacing-4) 0;
}

/* ===========================================
   Content Box (for static pages)
   =========================================== */
.content-box {
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.8;
}

.content-box h2 {
    margin-top: var(--spacing-8);
    margin-bottom: var(--spacing-4);
    font-size: var(--font-size-xl);
}

.content-box h2:first-child {
    margin-top: 0;
}

.content-box h3 {
    margin-top: var(--spacing-6);
    margin-bottom: var(--spacing-3);
    font-size: var(--font-size-lg);
}

.content-box p {
    margin-bottom: var(--spacing-4);
    color: var(--color-text-secondary);
}

.content-box ul {
    margin-bottom: var(--spacing-4);
    padding-left: var(--spacing-6);
}

.content-box li {
    margin-bottom: var(--spacing-2);
    color: var(--color-text-secondary);
}

.content-box a {
    color: var(--color-primary);
}

.content-box a:hover {
    text-decoration: underline;
}

/* ===========================================
   Contact Page
   =========================================== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--spacing-12);
    align-items: start;
}

@media (max-width: 768px) {
    .contact-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-8);
    }
}

.contact-info h2 {
    margin-bottom: var(--spacing-4);
}

.contact-info p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-6);
}

.contact-info__item {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-3);
}

.contact-info__item svg {
    color: var(--color-primary);
}

.contact-form-wrapper {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-8);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-4);
}

/* ===========================================
   Form Elements
   =========================================== */
.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2);
}

.form-label {
    font-weight: var(--font-weight-medium);
    font-size: var(--font-size-sm);
}

.form-input {
    padding: var(--spacing-3) var(--spacing-4);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    background: var(--color-bg);
    color: var(--color-text);
    transition: border-color var(--transition-fast);
}

.form-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(47, 107, 255, 0.1);
}

.form-textarea {
    resize: vertical;
    min-height: 120px;
}

/* ===========================================
   Tool Page Layout
   =========================================== */
.tool-page {
    padding: var(--spacing-6) 0 var(--spacing-16);
}

.tool-page__grid {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: var(--spacing-8);
    margin-top: var(--spacing-6);
}

@media (max-width: 1024px) {
    .tool-page__grid {
        grid-template-columns: 1fr;
    }
}

.tool-page__main {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-6);
}

.tool-page__sidebar {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-6);
}

/* Tool Header */
.tool-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
}

.tool-header__icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-xl);
    flex-shrink: 0;
}

.tool-header__title {
    font-size: var(--font-size-2xl);
    margin: 0 0 var(--spacing-1);
}

.tool-header__description {
    color: var(--color-text-secondary);
    margin: 0;
}

/* Tool Interface Card */
.tool-interface {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-4);
}

.card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-6);
    box-shadow: var(--shadow-md);
}

/* Tool Section */
.tool-section h2 {
    font-size: var(--font-size-lg);
    margin: 0 0 var(--spacing-4);
}

.prose {
    color: var(--color-text-secondary);
    line-height: 1.7;
}

.prose ol, .prose ul {
    padding-left: var(--spacing-6);
    margin-bottom: var(--spacing-4);
}

.prose li {
    margin-bottom: var(--spacing-2);
}

/* Feature List */
.feature-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.feature-list li {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    padding: var(--spacing-2) 0;
    color: var(--color-text-secondary);
}

.feature-list li svg {
    color: var(--color-success);
    flex-shrink: 0;
}

/* FAQ List */
.faq-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3);
}

.faq-item {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
}

.faq-question {
    padding: var(--spacing-4);
    cursor: pointer;
    font-weight: var(--font-weight-medium);
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-question::-webkit-details-marker {
    display: none;
}

.faq-question::after {
    content: '+';
    font-size: var(--font-size-xl);
    color: var(--color-text-secondary);
}

.faq-item[open] .faq-question::after {
    content: '-';
}

.faq-answer {
    padding: 0 var(--spacing-4) var(--spacing-4);
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* Sidebar */
.sidebar-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-4);
}

.sidebar-card__title {
    font-size: var(--font-size-base);
    margin: 0 0 var(--spacing-4);
}

.sidebar-tools {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2);
}

.sidebar-tool {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    padding: var(--spacing-2);
    border-radius: var(--radius-lg);
    color: var(--color-text);
    transition: background var(--transition-fast);
}

.sidebar-tool:hover {
    background: var(--color-bg-secondary);
}

.sidebar-tool__icon {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
}

.sidebar-tool__name {
    font-size: var(--font-size-sm);
}

/* Tool Actions */
.tool-actions {
    display: flex;
    gap: var(--spacing-3);
    flex-wrap: wrap;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: var(--spacing-4);
}

.stat-item {
    text-align: center;
    padding: var(--spacing-4);
    background: var(--color-bg-secondary);
    border-radius: var(--radius-lg);
}

.stat-item__value {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    display: block;
}

.stat-item__label {
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-top: var(--spacing-1);
    display: block;
}

/* Result Box */
.result-box {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-4);
    font-family: var(--font-mono);
    font-size: var(--font-size-sm);
    white-space: pre-wrap;
    word-break: break-all;
    min-height: 100px;
    max-height: 300px;
    overflow-y: auto;
}

/* Options Grid */
.options-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-4);
}

/* Checkbox and Radio */
.form-check {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    cursor: pointer;
}

.form-check input {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

/* Input Group */
.input-group {
    display: flex;
    gap: var(--spacing-2);
}

.input-group .form-input {
    flex: 1;
}

/* Button Group */
.btn-group {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-2);
}

.btn-group .btn {
    flex: 1;
    min-width: 100px;
}

/* ===========================================
   Toast Notifications System
   =========================================== */
.toast-container {
    position: fixed;
    bottom: var(--spacing-6);
    right: var(--spacing-6);
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3);
    pointer-events: none;
}

@media (max-width: 640px) {
    .toast-container {
        left: var(--spacing-4);
        right: var(--spacing-4);
        bottom: var(--spacing-4);
    }
}

.toast {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    padding: var(--spacing-3) var(--spacing-4);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    min-width: 280px;
    max-width: 420px;
    pointer-events: all;
    transform: translateX(120%);
    opacity: 0;
    transition: all var(--transition-normal);
}

.toast.active {
    transform: translateX(0);
    opacity: 1;
}

.toast__icon {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
}

.toast__message {
    flex: 1;
    font-size: var(--font-size-sm);
    line-height: 1.4;
}

.toast__close {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: none;
    border: none;
    color: var(--color-text-secondary);
    cursor: pointer;
    border-radius: var(--radius-md);
    font-size: 18px;
    transition: all var(--transition-fast);
}

.toast__close:hover {
    background: var(--color-bg-secondary);
    color: var(--color-text);
}

.toast--success {
    border-left: 4px solid var(--color-secondary);
}

.toast--success .toast__icon {
    color: var(--color-secondary);
}

.toast--error {
    border-left: 4px solid var(--color-danger);
}

.toast--error .toast__icon {
    color: var(--color-danger);
}

.toast--warning {
    border-left: 4px solid var(--color-warning);
}

.toast--warning .toast__icon {
    color: var(--color-warning);
}

.toast--info {
    border-left: 4px solid var(--color-primary);
}

.toast--info .toast__icon {
    color: var(--color-primary);
}

/* Toast Progress Bar */
.toast__progress {
    position: absolute;
    bottom: 0;
    left: 0;
    height: 3px;
    background: currentColor;
    opacity: 0.3;
    border-radius: 0 0 0 var(--radius-lg);
    animation: toast-progress linear forwards;
}

@keyframes toast-progress {
    from { width: 100%; }
    to { width: 0%; }
}

/* ===========================================
   Loading States
   =========================================== */
/* Spinner */
.spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.spinner--sm {
    width: 16px;
    height: 16px;
    border-width: 2px;
}

.spinner--lg {
    width: 32px;
    height: 32px;
    border-width: 3px;
}

.spinner--xl {
    width: 48px;
    height: 48px;
    border-width: 4px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Button Loading State */
.btn--loading {
    position: relative;
    color: transparent !important;
    pointer-events: none;
}

.btn--loading::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    top: 50%;
    left: 50%;
    margin-top: -8px;
    margin-left: -8px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.btn--outline.btn--loading::after,
.btn--secondary.btn--loading::after {
    border-color: rgba(47, 107, 255, 0.3);
    border-top-color: var(--color-primary);
}

/* Skeleton Loading */
.skeleton {
    background: linear-gradient(90deg,
        var(--color-bg-secondary) 25%,
        var(--color-border) 50%,
        var(--color-bg-secondary) 75%
    );
    background-size: 200% 100%;
    animation: skeleton-shimmer 1.5s infinite;
    border-radius: var(--radius-md);
}

.skeleton--text {
    height: 1em;
    margin-bottom: 0.5em;
}

.skeleton--text:last-child {
    width: 80%;
}

.skeleton--title {
    height: 1.5em;
    width: 60%;
    margin-bottom: 1em;
}

.skeleton--avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
}

.skeleton--card {
    height: 200px;
}

.skeleton--button {
    height: 40px;
    width: 120px;
}

@keyframes skeleton-shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* Page Loading Overlay */
.page-loader {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-bg);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-4);
    z-index: 9999;
    opacity: 1;
    transition: opacity var(--transition-normal);
}

.page-loader.hidden {
    opacity: 0;
    pointer-events: none;
}

.page-loader__spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.page-loader__text {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
}

/* Tool Processing Overlay */
.processing-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(var(--color-bg), 0.8);
    backdrop-filter: blur(4px);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-3);
    border-radius: inherit;
    z-index: 10;
}

/* Progress Bar */
.progress {
    width: 100%;
    height: 8px;
    background: var(--color-bg-secondary);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress__bar {
    height: 100%;
    background: var(--color-primary);
    border-radius: var(--radius-full);
    transition: width var(--transition-normal);
}

.progress__bar--animated {
    background: linear-gradient(
        90deg,
        var(--color-primary) 0%,
        var(--color-primary-light) 50%,
        var(--color-primary) 100%
    );
    background-size: 200% 100%;
    animation: progress-shimmer 1.5s linear infinite;
}

@keyframes progress-shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.progress--indeterminate .progress__bar {
    width: 30% !important;
    animation: progress-indeterminate 1.5s ease-in-out infinite;
}

@keyframes progress-indeterminate {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(400%); }
}

/* ===========================================
   Animations & Transitions
   =========================================== */
/* Fade animations */
.fade-in {
    animation: fadeIn var(--transition-normal) ease forwards;
}

.fade-out {
    animation: fadeOut var(--transition-normal) ease forwards;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes fadeOut {
    from { opacity: 1; }
    to { opacity: 0; }
}

/* Slide animations */
.slide-in-up {
    animation: slideInUp var(--transition-normal) ease forwards;
}

.slide-in-down {
    animation: slideInDown var(--transition-normal) ease forwards;
}

.slide-in-left {
    animation: slideInLeft var(--transition-normal) ease forwards;
}

.slide-in-right {
    animation: slideInRight var(--transition-normal) ease forwards;
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Scale animations */
.scale-in {
    animation: scaleIn var(--transition-normal) ease forwards;
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* Bounce animation */
.bounce {
    animation: bounce 0.5s ease;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

/* Pulse animation */
.pulse {
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* Shake animation (for errors) */
.shake {
    animation: shake 0.5s ease;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20%, 60% { transform: translateX(-5px); }
    40%, 80% { transform: translateX(5px); }
}

/* Staggered animations for lists */
.stagger-item {
    opacity: 0;
    animation: slideInUp var(--transition-normal) ease forwards;
}

.stagger-item:nth-child(1) { animation-delay: 0ms; }
.stagger-item:nth-child(2) { animation-delay: 50ms; }
.stagger-item:nth-child(3) { animation-delay: 100ms; }
.stagger-item:nth-child(4) { animation-delay: 150ms; }
.stagger-item:nth-child(5) { animation-delay: 200ms; }
.stagger-item:nth-child(6) { animation-delay: 250ms; }
.stagger-item:nth-child(7) { animation-delay: 300ms; }
.stagger-item:nth-child(8) { animation-delay: 350ms; }
.stagger-item:nth-child(9) { animation-delay: 400ms; }
.stagger-item:nth-child(10) { animation-delay: 450ms; }

/* Hover animations */
.hover-lift {
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.hover-lift:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.hover-scale {
    transition: transform var(--transition-fast);
}

.hover-scale:hover {
    transform: scale(1.05);
}

.hover-glow {
    transition: box-shadow var(--transition-fast);
}

.hover-glow:hover {
    box-shadow: 0 0 20px rgba(47, 107, 255, 0.3);
}

/* ===========================================
   Mobile Menu Animations
   =========================================== */
.header__menu-toggle {
    display: none; /* Hidden by default on desktop */
    position: relative;
    width: 40px;
    height: 40px;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    background: none;
    border: none;
    padding: 0;
    cursor: pointer;
    z-index: 101;
}

/* Show hamburger menu only on mobile */
@media (max-width: 767px) {
    .header__menu-toggle {
        display: flex;
    }
}

.header__menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: #fff;
    border-radius: 2px;
    transition: all var(--transition-fast);
    transform-origin: center;
}

.header__menu-toggle.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.header__menu-toggle.active span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}

.header__menu-toggle.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* Mobile Navigation Slide */
@media (max-width: 767px) {
    .header__nav {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: var(--ink);
        padding: calc(var(--header-height) + var(--spacing-8)) var(--spacing-6) var(--spacing-6);
        transform: translateX(100%);
        transition: transform var(--transition-normal);
        overflow-y: auto;
        z-index: 100;
    }

    .header__nav.active {
        transform: translateX(0);
        display: block;
    }

    .header__nav-list {
        flex-direction: column;
        align-items: stretch;
        gap: var(--spacing-1);
    }

    .header__nav-link {
        padding: var(--spacing-4);
        font-size: var(--font-size-lg);
        border-radius: var(--radius-lg);
    }

    .header__nav-link:hover {
        background: var(--d-stroke);
    }

    .header__dropdown {
        position: static;
        transform: none;
        box-shadow: none;
        border: none;
        padding: var(--spacing-2) 0 var(--spacing-2) var(--spacing-4);
        min-width: auto;
        display: none;
        background: transparent;
    }

    .header__nav-item--dropdown.open .header__dropdown {
        display: block;
    }

    .header__dropdown-grid {
        grid-template-columns: 1fr;
    }

    .header__dropdown-footer {
        display: none;
    }
}

/* ===========================================
   Improved Responsive Styles
   =========================================== */
/* Mobile First Breakpoints */
/* Extra small devices (phones, 0-576px) */
@media (max-width: 575.98px) {
    :root {
        --spacing-section: var(--spacing-8);
    }

    .container {
        padding: 0 var(--spacing-4);
    }

    h1 { font-size: var(--font-size-2xl); }
    h2 { font-size: var(--font-size-xl); }
    h3 { font-size: var(--font-size-lg); }

    .hero {
        padding: var(--spacing-8) 0;
    }

    .hero__title {
        font-size: var(--font-size-2xl);
    }

    .hero__subtitle {
        font-size: var(--font-size-base);
    }

    .hero__actions {
        flex-direction: column;
    }

    .hero__actions .btn {
        width: 100%;
    }

    /* Metricas del hero: 2x2 en movil */
    .hero__stats {
        flex-wrap: wrap;
    }

    .hero__stat {
        flex: 1 1 50%;
    }

    .hero__stat:nth-child(2) {
        border-right: none;
    }

    .hero__stat:nth-child(1),
    .hero__stat:nth-child(2) {
        border-bottom: 1px solid var(--color-border);
    }

    .section {
        padding: var(--spacing-8) 0;
    }

    .tools-grid {
        grid-template-columns: 1fr;
    }

    .categories-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-3);
    }

    .category-card {
        padding: var(--spacing-4);
    }

    .category-card__icon {
        width: 48px;
        height: 48px;
    }

    .category-card__title {
        font-size: var(--font-size-base);
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .tool-header {
        flex-direction: column;
        text-align: center;
    }

    .tool-header__icon {
        margin: 0 auto;
    }

    .tool-actions {
        flex-direction: column;
    }

    .tool-actions .btn {
        width: 100%;
    }

    .btn-group {
        flex-direction: column;
    }

    .btn-group .btn {
        width: 100%;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .options-grid {
        grid-template-columns: 1fr;
    }

    .card {
        padding: var(--spacing-4);
    }

    .footer__grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-6);
    }

    .footer__bottom {
        flex-direction: column;
        gap: var(--spacing-4);
        text-align: center;
    }
}

/* Small devices (landscape phones, 576px - 767px) */
@media (min-width: 576px) and (max-width: 767.98px) {
    .tools-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .categories-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* Medium devices (tablets, 768px - 991px) */
@media (min-width: 768px) and (max-width: 991.98px) {
    .tool-page__grid {
        grid-template-columns: 1fr;
    }

    .tool-page__sidebar {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-4);
    }

    .footer__grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* Large devices (desktops, 992px - 1199px) */
@media (min-width: 992px) and (max-width: 1199.98px) {
    .tool-page__grid {
        grid-template-columns: 1fr 280px;
    }
}

/* Extra large devices (large desktops, 1200px+) */
@media (min-width: 1200px) {
    .container {
        max-width: 1280px;
    }
}

/* ===========================================
   Touch Device Optimizations
   =========================================== */
@media (hover: none) {
    .tool-card:hover,
    .category-card:hover {
        transform: none;
    }

    .btn:hover {
        transform: none;
    }

    .hover-lift:hover {
        transform: none;
    }

    .hover-scale:hover {
        transform: none;
    }
}

/* ===========================================
   Print Styles
   =========================================== */
@media print {
    .header,
    .footer,
    .toast-container,
    .header__actions,
    .tool-page__sidebar {
        display: none !important;
    }

    .tool-page__grid {
        grid-template-columns: 1fr;
    }

    body {
        background: white;
        color: black;
    }

    .card {
        box-shadow: none;
        border: 1px solid #ccc;
    }
}

/* ===========================================
   Accessibility Improvements
   =========================================== */
/* Focus visible for keyboard navigation */
:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* Remove outline for mouse clicks */
:focus:not(:focus-visible) {
    outline: none;
}

/* High contrast mode */
@media (prefers-contrast: high) {
    :root {
        --color-border: #000;
    }

    .btn--primary {
        border: 2px solid #000;
    }

    .card,
    .tool-card,
    .category-card {
        border-width: 2px;
    }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    html {
        scroll-behavior: auto;
    }
}

/* ===========================================
   Utility Classes
   =========================================== */
/* Display */
.d-none { display: none !important; }
.d-block { display: block !important; }
.d-flex { display: flex !important; }
.d-grid { display: grid !important; }

@media (min-width: 768px) {
    .d-md-none { display: none !important; }
    .d-md-block { display: block !important; }
    .d-md-flex { display: flex !important; }
}

@media (max-width: 767px) {
    .d-mobile-none { display: none !important; }
}

/* Spacing */
.mt-0 { margin-top: 0 !important; }
.mt-4 { margin-top: var(--spacing-4) !important; }
.mt-6 { margin-top: var(--spacing-6) !important; }
.mt-8 { margin-top: var(--spacing-8) !important; }

.mb-0 { margin-bottom: 0 !important; }
.mb-4 { margin-bottom: var(--spacing-4) !important; }
.mb-6 { margin-bottom: var(--spacing-6) !important; }
.mb-8 { margin-bottom: var(--spacing-8) !important; }

.py-4 { padding-top: var(--spacing-4) !important; padding-bottom: var(--spacing-4) !important; }
.py-8 { padding-top: var(--spacing-8) !important; padding-bottom: var(--spacing-8) !important; }

/* Text */
.text-center { text-align: center !important; }
.text-left { text-align: left !important; }
.text-right { text-align: right !important; }

.text-primary { color: var(--color-primary) !important; }
.text-secondary { color: var(--color-text-secondary) !important; }
.text-success { color: var(--color-secondary) !important; }
.text-danger { color: var(--color-danger) !important; }
.text-warning { color: var(--color-warning) !important; }

.font-mono { font-family: var(--font-mono) !important; }
.font-bold { font-weight: var(--font-weight-bold) !important; }

/* Width */
.w-full { width: 100% !important; }
.w-auto { width: auto !important; }

/* Flex */
.flex-wrap { flex-wrap: wrap !important; }
.flex-1 { flex: 1 !important; }
.items-center { align-items: center !important; }
.justify-center { justify-content: center !important; }
.justify-between { justify-content: space-between !important; }
.gap-2 { gap: var(--spacing-2) !important; }
.gap-4 { gap: var(--spacing-4) !important; }
.gap-6 { gap: var(--spacing-6) !important; }

/* Visibility */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Cursor */
.cursor-pointer { cursor: pointer !important; }
.cursor-not-allowed { cursor: not-allowed !important; }

/* Overflow */
.overflow-hidden { overflow: hidden !important; }
.overflow-auto { overflow: auto !important; }

/* Position */
.relative { position: relative !important; }
.absolute { position: absolute !important; }
.fixed { position: fixed !important; }

/* Border */
.rounded { border-radius: var(--radius-md) !important; }
.rounded-lg { border-radius: var(--radius-lg) !important; }
.rounded-xl { border-radius: var(--radius-xl) !important; }
.rounded-full { border-radius: var(--radius-full) !important; }

/* Shadow */
.shadow-sm { box-shadow: var(--shadow-sm) !important; }
.shadow-md { box-shadow: var(--shadow-md) !important; }
.shadow-lg { box-shadow: var(--shadow-lg) !important; }
.shadow-none { box-shadow: none !important; }

/* Opacity */
.opacity-0 { opacity: 0 !important; }
.opacity-50 { opacity: 0.5 !important; }
.opacity-100 { opacity: 1 !important; }

/* Transition */
.transition { transition: all var(--transition-fast) !important; }
.transition-none { transition: none !important; }

/* ===========================================
   Advertisement Styles
   =========================================== */
.ad-container {
    position: relative;
    margin: var(--spacing-4) 0;
    text-align: center;
    min-height: 50px;
}

.ad-label {
    display: block;
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-2);
    opacity: 0.6;
}

/* Header ad - full width */
.ad-header {
    background: var(--color-bg-secondary);
    padding: var(--spacing-3);
    border-bottom: 1px solid var(--color-border);
    margin: 0;
}

/* Sidebar ads */
.ad-sidebar_top,
.ad-sidebar_bottom {
    background: var(--color-bg-secondary);
    padding: var(--spacing-3);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-4);
}

/* Tool page ads */
.ad-tool_top {
    margin-bottom: var(--spacing-4);
    padding: var(--spacing-3);
    background: var(--color-bg-secondary);
    border-radius: var(--radius-lg);
}

.ad-tool_bottom {
    margin-top: var(--spacing-6);
    padding: var(--spacing-3);
    background: var(--color-bg-secondary);
    border-radius: var(--radius-lg);
}

/* Between tools list */
.ad-between_tools {
    grid-column: 1 / -1;
    padding: var(--spacing-4);
    background: var(--color-bg-secondary);
    border-radius: var(--radius-lg);
}

/* Footer ad */
.ad-footer {
    background: var(--color-bg-secondary);
    padding: var(--spacing-4);
    border-top: 1px solid var(--color-border);
    margin-top: var(--spacing-6);
}

/* Responsive ads */
@media (max-width: 768px) {
    .ad-container {
        margin: var(--spacing-3) 0;
    }

    .ad-sidebar_top,
    .ad-sidebar_bottom {
        display: none; /* Hide sidebar ads on mobile - show in-content instead */
    }
}

/* ===========================================
   Blog / Articles Styles
   =========================================== */

/* Articles Grid */
.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--spacing-6);
}

/* Article Card */
.article-card {
    background: var(--color-bg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    overflow: hidden;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.article-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.article-card__link {
    display: block;
    text-decoration: none;
    color: inherit;
}

.article-card__image {
    aspect-ratio: 16 / 9;
    overflow: hidden;
    background: var(--color-gray-100);
}

.article-card__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.article-card:hover .article-card__image img {
    transform: scale(1.05);
}

.article-card__content {
    padding: var(--spacing-4);
}

.article-card__title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text);
    margin-bottom: var(--spacing-2);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-card__excerpt {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-3);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-card__meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
}

.article-card__tool {
    background: var(--color-primary);
    color: white;
    padding: 2px 8px;
    border-radius: var(--radius-sm);
    font-weight: var(--font-weight-medium);
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-4);
    margin-top: var(--spacing-8);
    padding-top: var(--spacing-6);
    border-top: 1px solid var(--color-border);
}

.pagination__link {
    display: inline-flex;
    align-items: center;
    padding: var(--spacing-2) var(--spacing-4);
    background: var(--color-primary);
    color: white;
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    text-decoration: none;
    transition: background 0.2s ease;
}

.pagination__link:hover {
    background: var(--color-primary-dark);
}

.pagination__info {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

/* Single Article Page */
.article {
    max-width: 800px;
    margin: 0 auto;
}

.article__header {
    margin-bottom: var(--spacing-6);
}

.article__title {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-text);
    margin-bottom: var(--spacing-3);
    line-height: 1.3;
}

.article__meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-4);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.article__meta time {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
}

.article__tool a {
    color: var(--color-primary);
    text-decoration: none;
}

.article__tool a:hover {
    text-decoration: underline;
}

.article__featured-image {
    margin-bottom: var(--spacing-6);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.article__featured-image img {
    width: 100%;
    height: auto;
    display: block;
}

.article__image {
    width: 100%;
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-6);
}

.article__content {
    font-size: var(--font-size-base);
    line-height: 1.8;
    color: var(--color-text);
}

.article__content h2 {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-semibold);
    margin-top: var(--spacing-8);
    margin-bottom: var(--spacing-4);
    color: var(--color-text);
}

.article__content h3 {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    margin-top: var(--spacing-6);
    margin-bottom: var(--spacing-3);
    color: var(--color-text);
}

.article__content p {
    margin-bottom: var(--spacing-4);
}

.article__content ul,
.article__content ol {
    margin-bottom: var(--spacing-4);
    padding-left: var(--spacing-6);
}

.article__content li {
    margin-bottom: var(--spacing-2);
}

.article__content a {
    color: var(--color-primary);
    text-decoration: underline;
}

.article__content a:hover {
    color: var(--color-primary-dark);
}

.article__content pre {
    background: var(--color-gray-900);
    color: var(--color-gray-100);
    padding: var(--spacing-4);
    border-radius: var(--radius-md);
    overflow-x: auto;
    margin-bottom: var(--spacing-4);
}

.article__content code {
    font-family: var(--font-family-mono);
    font-size: var(--font-size-sm);
}

.article__content blockquote {
    border-left: 4px solid var(--color-primary);
    padding-left: var(--spacing-4);
    margin: var(--spacing-4) 0;
    font-style: italic;
    color: var(--color-text-secondary);
}

.article__content table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: var(--spacing-4);
}

.article__content th,
.article__content td {
    padding: var(--spacing-3);
    border: 1px solid var(--color-border);
    text-align: left;
}

.article__content th {
    background: var(--color-bg-secondary);
    font-weight: var(--font-weight-semibold);
}

.article__cta {
    margin-top: var(--spacing-8);
    text-align: center;
    padding: var(--spacing-6);
    background: var(--color-bg-secondary);
    border-radius: var(--radius-lg);
}

.article__navigation {
    display: flex;
    justify-content: center;
    padding-top: var(--spacing-4);
}

.articles-grid--small {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}

/* Related Articles */
.related-articles {
    margin-top: var(--spacing-8);
    padding-top: var(--spacing-6);
    border-top: 1px solid var(--color-border);
}

.related-articles__title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-4);
}

.related-articles__grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-4);
}

/* Responsive */
@media (max-width: 768px) {
    .articles-grid {
        grid-template-columns: 1fr;
    }

    .article__title {
        font-size: var(--font-size-2xl);
    }

    .article__content h2 {
        font-size: var(--font-size-xl);
    }

    .pagination {
        flex-direction: column;
        gap: var(--spacing-3);
    }
}