/* ================================================================
   JSON YAML CONVERTER - STYLESHEET
   Modern Professional Design | Mobile-First | Core Web Vitals Optimized
   ================================================================ */

/* ================================================================
   CSS CUSTOM PROPERTIES (Design Tokens)
   ================================================================ */
:root {
    /* Colors - Professional Dark Theme */
    --color-bg-primary: #0a0a0f;
    --color-bg-secondary: #12121a;
    --color-bg-tertiary: #1a1a24;
    --color-bg-card: #16161f;
    --color-bg-input: #0d0d12;

    /* Accent Colors */
    --color-accent-primary: #6366f1;
    /* Indigo */
    --color-accent-secondary: #8b5cf6;
    /* Purple */
    --color-accent-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    --color-accent-glow: rgba(99, 102, 241, 0.3);

    /* Text Colors */
    --color-text-primary: #f8fafc;
    --color-text-secondary: #94a3b8;
    --color-text-muted: #64748b;

    /* Semantic Colors */
    --color-success: #10b981;
    --color-error: #ef4444;
    --color-warning: #f59e0b;

    /* Borders */
    --color-border: rgba(255, 255, 255, 0.08);
    --color-border-hover: rgba(255, 255, 255, 0.15);

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;

    /* Font Sizes */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;
    --text-5xl: 3rem;

    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 40px var(--color-accent-glow);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;

    /* Container */
    --container-max: 1200px;
    --container-padding: var(--space-4);
}

/* ================================================================
   RESET & BASE STYLES
   ================================================================ */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-sans);
    font-size: var(--text-base);
    line-height: 1.6;
    color: var(--color-text-primary);
    background-color: var(--color-bg-primary);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Remove list styles */
ul,
ol {
    list-style: none;
}

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

a:hover {
    color: var(--color-accent-secondary);
}

/* Images */
img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Buttons */
button {
    font-family: inherit;
    font-size: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

/* Textareas */
textarea {
    font-family: var(--font-mono);
    resize: none;
}

/* Focus styles */
:focus-visible {
    outline: 2px solid var(--color-accent-primary);
    outline-offset: 2px;
}

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

/* ================================================================
   HEADER
   ================================================================ */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-4) 0;
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-weight: 700;
    font-size: var(--text-xl);
    color: var(--color-text-primary);
}

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

.logo-icon {
    font-size: 1.5rem;
}

.logo-highlight {
    color: var(--color-accent-primary);
}

/* Navigation */
.nav {
    display: flex;
    align-items: center;
    position: relative;
}

.nav-list {
    display: flex;
    align-items: center;
    gap: var(--space-6);
    margin: 0;
    padding: 0;
    list-style: none;
}

.nav-link {
    color: var(--color-text-secondary);
    font-weight: 500;
    font-size: var(--text-sm);
    padding: var(--space-2) 0;
    position: relative;
    transition: color var(--transition-fast);
}

.nav-link:hover {
    color: var(--color-text-primary);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent-gradient);
    transition: width var(--transition-base);
}

.nav-link:hover::after {
    width: 100%;
}

/* Dropdown Navigation */
.nav-item {
    position: relative;
    display: flex;
    align-items: center;
}

.nav-item.has-dropdown>.nav-link::after {
    display: none;
    /* Remove underline for dropdown items */
}

.nav-item.has-dropdown>.nav-link {
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

.nav-item.has-dropdown>.nav-link::before {
    content: '▼';
    font-size: 0.6rem;
    order: 1;
    opacity: 0.6;
    transition: transform var(--transition-fast);
}

.nav-item.has-dropdown:hover>.nav-link::before {
    transform: rotate(180deg);
}

/* Dropdown Menu */
.nav-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 200px;
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: var(--space-2);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-fast), visibility var(--transition-fast);
    margin-top: var(--space-2);
    z-index: 200;
}

/* Align last dropdown to the right to prevent overflow */
.nav-item.has-dropdown:last-child .nav-dropdown {
    left: auto;
    right: 0;
}

.nav-item.has-dropdown:hover .nav-dropdown,
.nav-item.has-dropdown.active .nav-dropdown {
    opacity: 1;
    visibility: visible;
}

.nav-dropdown::before {
    content: '';
    position: absolute;
    top: -8px;
    left: var(--space-6);
    border: 4px solid transparent;
    border-bottom-color: var(--color-border);
}

.nav-item.has-dropdown:last-child .nav-dropdown::before {
    left: auto;
    right: var(--space-6);
}

.nav-dropdown a {
    display: block;
    padding: var(--space-2) var(--space-3);
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.nav-dropdown a:hover {
    background: var(--color-bg-tertiary);
    color: var(--color-text-primary);
}

.nav-dropdown-title {
    font-size: var(--text-xs);
    font-weight: 600;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: var(--space-2) var(--space-3);
    margin-top: var(--space-2);
}

.nav-dropdown-title:first-child {
    margin-top: 0;
}

/* Mega footer adjustments */
.nav-dropdown-divider {
    height: 1px;
    background: var(--color-border);
    margin: var(--space-2) 0;
}

/* Mobile Menu Button */
.mobile-menu-btn {
    display: none;
    width: 40px;
    height: 40px;
    align-items: center;
    justify-content: center;
}

.hamburger {
    width: 20px;
    height: 2px;
    background: var(--color-text-primary);
    position: relative;
    transition: background var(--transition-fast);
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    background: var(--color-text-primary);
    left: 0;
    transition: transform var(--transition-fast), top var(--transition-fast);
}

.hamburger::before {
    top: -6px;
}

.hamburger::after {
    top: 6px;
}

/* Hamburger active state - transforms to X */
.mobile-menu-btn.active .hamburger {
    background: transparent;
}

.mobile-menu-btn.active .hamburger::before {
    top: 0;
    transform: rotate(45deg);
}

.mobile-menu-btn.active .hamburger::after {
    top: 0;
    transform: rotate(-45deg);
}

/* ================================================================
   HERO SECTION
   ================================================================ */
.hero {
    padding: var(--space-16) 0 var(--space-12);
    text-align: center;
    background: radial-gradient(ellipse at center top, rgba(99, 102, 241, 0.1) 0%, transparent 60%);
}

.hero-title {
    font-size: var(--text-4xl);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--space-4);
    background: linear-gradient(135deg, var(--color-text-primary) 0%, var(--color-accent-primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: var(--text-lg);
    color: var(--color-text-secondary);
    max-width: 700px;
    margin: 0 auto var(--space-6);
    line-height: 1.7;
}

.hero-badges {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
    justify-content: center;
}

.badge {
    display: inline-flex;
    align-items: center;
    padding: var(--space-2) var(--space-4);
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-2xl);
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
}

/* ================================================================
   CONVERTER SECTION
   ================================================================ */
.converter-section {
    padding: var(--space-8) 0 var(--space-16);
}

/* Tabs */
.converter-tabs {
    display: flex;
    gap: var(--space-2);
    margin-bottom: var(--space-6);
    padding: var(--space-1);
    background: var(--color-bg-secondary);
    border-radius: var(--radius-lg);
    width: fit-content;
    margin-left: auto;
    margin-right: auto;
}

.tab-btn {
    padding: var(--space-3) var(--space-6);
    font-weight: 600;
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    background: transparent;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.tab-btn:hover {
    color: var(--color-text-secondary);
}

.tab-btn.active {
    background: var(--color-accent-gradient);
    color: white;
    box-shadow: var(--shadow-md);
}

/* Converter Panel */
.converter-panel {
    display: none;
}

.converter-panel.active {
    display: block;
}

/* Converter Grid */
.converter-grid {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: var(--space-4);
    align-items: stretch;
}

/* Editor Panels */
.editor-panel {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.editor-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-3) var(--space-4);
    background: var(--color-bg-tertiary);
    border-bottom: 1px solid var(--color-border);
}

.editor-title {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-text-secondary);
}

.editor-actions {
    display: flex;
    gap: var(--space-2);
}

.btn-icon {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-xs);
    font-weight: 500;
    color: var(--color-text-muted);
    background: var(--color-bg-secondary);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.btn-icon:hover {
    color: var(--color-text-primary);
    background: var(--color-bg-card);
}

.btn-icon svg {
    width: 14px;
    height: 14px;
}

/* Textarea */
.editor-textarea {
    flex: 1;
    width: 100%;
    min-height: 400px;
    padding: var(--space-4);
    background: var(--color-bg-input);
    border: none;
    color: var(--color-text-primary);
    font-size: var(--text-sm);
    line-height: 1.7;
    tab-size: 2;
}

.editor-textarea::placeholder {
    color: var(--color-text-muted);
}

.editor-textarea:focus {
    outline: none;
    box-shadow: inset 0 0 0 2px var(--color-accent-primary);
}

.editor-textarea.output {
    background: var(--color-bg-secondary);
}

/* Convert Button */
.converter-actions {
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-convert {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-4);
    background: var(--color-accent-gradient);
    border-radius: var(--radius-xl);
    color: white;
    font-weight: 600;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-glow);
}

.btn-convert:hover {
    transform: scale(1.05);
    box-shadow: 0 0 60px var(--color-accent-glow);
}

.btn-convert .btn-text {
    font-size: var(--text-xs);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Error Message */
.error-message {
    margin-top: var(--space-4);
    padding: var(--space-3) var(--space-4);
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    border-radius: var(--radius-md);
    color: var(--color-error);
    font-size: var(--text-sm);
    display: none;
}

.error-message.show {
    display: block;
}

/* ================================================================
   HOW TO SECTION
   ================================================================ */
.how-to-section {
    padding: var(--space-16) 0;
    background: var(--color-bg-secondary);
}

.section-title {
    font-size: var(--text-3xl);
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--space-12);
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
}

.step-card {
    text-align: center;
    padding: var(--space-8);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    transition: all var(--transition-base);
}

.step-card:hover {
    border-color: var(--color-accent-primary);
    transform: translateY(-4px);
}

.step-number {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-4);
    background: var(--color-accent-gradient);
    border-radius: 50%;
    font-size: var(--text-xl);
    font-weight: 700;
    color: white;
}

.step-title {
    font-size: var(--text-lg);
    font-weight: 600;
    margin-bottom: var(--space-2);
}

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

/* ================================================================
   COMPARISON SECTION
   ================================================================ */
.comparison-section {
    padding: var(--space-16) 0;
}

.table-wrapper {
    overflow-x: auto;
    margin-bottom: var(--space-8);
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--color-bg-card);
    border-radius: var(--radius-xl);
    overflow: hidden;
}

.comparison-table th,
.comparison-table td {
    padding: var(--space-4) var(--space-6);
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

.comparison-table th {
    background: var(--color-bg-tertiary);
    font-weight: 600;
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.comparison-table td {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
}

.comparison-table td strong {
    color: var(--color-success);
}

.comparison-table tbody tr:hover {
    background: var(--color-bg-tertiary);
}

.section-cta {
    text-align: center;
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    padding: var(--space-3) var(--space-6);
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    color: var(--color-text-primary);
    font-weight: 500;
    font-size: var(--text-sm);
    transition: all var(--transition-fast);
}

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

/* ================================================================
   FEATURES SECTION
   ================================================================ */
.features-section {
    padding: var(--space-16) 0;
    background: var(--color-bg-secondary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-6);
}

.feature-card {
    text-align: center;
    padding: var(--space-8);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    transition: all var(--transition-base);
}

.feature-card:hover {
    border-color: var(--color-accent-primary);
    transform: translateY(-4px);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: var(--space-4);
}

.feature-title {
    font-size: var(--text-lg);
    font-weight: 600;
    margin-bottom: var(--space-2);
}

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

/* ================================================================
   FAQ SECTION
   ================================================================ */
.faq-section {
    padding: var(--space-16) 0;
}

.faq-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-6);
}

.faq-item {
    padding: var(--space-6);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    transition: all var(--transition-base);
}

.faq-item:hover {
    border-color: var(--color-border-hover);
}

.faq-question {
    font-size: var(--text-base);
    font-weight: 600;
    margin-bottom: var(--space-3);
    color: var(--color-text-primary);
}

.faq-answer {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* ================================================================
   CTA SECTION
   ================================================================ */
.cta-section {
    padding: var(--space-16) 0;
    text-align: center;
    background: radial-gradient(ellipse at center, rgba(99, 102, 241, 0.1) 0%, transparent 60%);
}

.cta-title {
    font-size: var(--text-3xl);
    font-weight: 700;
    margin-bottom: var(--space-4);
}

.cta-description {
    font-size: var(--text-lg);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-8);
}

.cta-buttons {
    display: flex;
    gap: var(--space-4);
    justify-content: center;
    flex-wrap: wrap;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    padding: var(--space-4) var(--space-8);
    background: var(--color-accent-gradient);
    border-radius: var(--radius-lg);
    color: white;
    font-weight: 600;
    font-size: var(--text-base);
    transition: all var(--transition-base);
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 50px var(--color-accent-glow);
    color: white;
}

/* ================================================================
   FOOTER
   ================================================================ */
.footer {
    padding: var(--space-16) 0 var(--space-8);
    background: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.8fr repeat(5, 1fr);
    gap: var(--space-8) var(--space-6);
    margin-bottom: var(--space-12);
    align-items: start;
}

.footer-brand {
    padding-right: var(--space-6);
}

.footer-brand .logo {
    margin-bottom: var(--space-4);
}

.footer-tagline {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    line-height: 1.6;
    max-width: 220px;
}

.footer-links {
    min-width: 0;
}

.footer-title {
    font-size: var(--text-xs);
    font-weight: 600;
    color: var(--color-text-primary);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: var(--space-5);
    white-space: nowrap;
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.footer-links li {
    line-height: 1.4;
}

.footer-links a {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
    display: inline-block;
}

.footer-links a:hover {
    color: var(--color-accent-primary);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--space-8);
    border-top: 1px solid var(--color-border);
    flex-wrap: wrap;
    gap: var(--space-4);
}

.footer-bottom-left,
.footer-bottom-right {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.footer-bottom-left {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-1);
}

.footer-bottom-right a {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
}

.footer-bottom-right a:hover {
    color: var(--color-accent-primary);
}

.footer-divider {
    color: var(--color-border);
    font-size: var(--text-sm);
}

.section-note {
    text-align: center;
    margin-top: var(--space-6);
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
}

.section-note a {
    color: var(--color-accent-primary);
}

.section-note a:hover {
    text-decoration: underline;
}

.copyright,
.footer-note {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
}

/* ================================================================
   RESPONSIVE DESIGN - MOBILE FIRST
   ================================================================ */

/* Tablet and below */
@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-8);
    }

    .footer-brand {
        grid-column: span 2;
    }
}

/* Tablet */
@media (max-width: 768px) {
    :root {
        --container-padding: var(--space-5);
    }

    /* Navigation - hidden by default, JS handles show/hide with inline styles */
    .nav-list {
        display: none;
    }

    .nav-link {
        padding: var(--space-3) var(--space-4);
        display: block;
        font-size: var(--text-base);
    }

    .nav-item {
        width: 100%;
    }

    /* Mobile dropdown styling */
    .nav-item.has-dropdown .nav-dropdown {
        position: static;
        opacity: 1;
        visibility: visible;
        display: none;
        background: transparent;
        border: none;
        padding-left: var(--space-4);
        margin-top: var(--space-2);
    }

    .nav-item.has-dropdown.active .nav-dropdown {
        display: block;
    }

    .mobile-menu-btn {
        display: flex;
    }

    /* Hero */
    .hero {
        padding: var(--space-10) 0 var(--space-8);
    }

    .hero-title {
        font-size: var(--text-3xl);
    }

    .hero-subtitle {
        font-size: var(--text-base);
    }

    /* Converter */
    .converter-grid {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }

    .converter-actions {
        padding: var(--space-2) 0;
    }

    .btn-convert {
        flex-direction: row;
        padding: var(--space-3) var(--space-8);
        width: 100%;
        justify-content: center;
    }

    .btn-convert .btn-arrow {
        transform: rotate(90deg);
    }

    .editor-textarea {
        min-height: 250px;
    }

    /* Steps */
    .steps-grid {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }

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

    /* FAQ */
    .faq-grid {
        grid-template-columns: 1fr;
    }

    /* Footer */
    /* ================================================================
   FOOTER
   ================================================================ */
    .footer {
        background-color: var(--color-bg-secondary);
        border-top: 1px solid var(--color-border);
        padding: var(--space-16) 0 var(--space-8);
    }

    .footer-grid {
        display: grid;
        /* Desktop: 6 columns (Brand + 5 Link Groups) */
        grid-template-columns: 1.5fr repeat(5, 1fr);
        gap: var(--space-8);
        margin-bottom: var(--space-16);
    }

    .footer-brand {
        display: flex;
        flex-direction: column;
        gap: var(--space-4);
    }

    .footer-tagline {
        color: var(--color-text-secondary);
        font-size: var(--text-sm);
        line-height: 1.6;
        max-width: 300px;
    }

    .footer-title {
        font-size: var(--text-sm);
        font-weight: 600;
        color: var(--color-text-primary);
        text-transform: uppercase;
        letter-spacing: 0.05em;
        margin-bottom: var(--space-4);
    }

    .footer-links ul {
        display: flex;
        flex-direction: column;
        gap: var(--space-3);
    }

    .footer-links a {
        color: var(--color-text-secondary);
        font-size: var(--text-sm);
        transition: color var(--transition-fast);
    }

    .footer-links a:hover {
        color: var(--color-accent-primary);
    }

    /* ... (Bottom bar styles remain similar) ... */

    /* Tablet (max-width: 1024px) -> 3 Columns */
    @media (max-width: 1024px) {
        .footer-grid {
            grid-template-columns: repeat(3, 1fr);
            gap: var(--space-8);
        }

        .footer-brand {
            grid-column: span 1;
            /* Fits naturally in the grid */
        }
    }

    /* Mobile (max-width: 768px) -> 1 Column */
    @media (max-width: 768px) {
        .footer-grid {
            display: flex;
            flex-direction: column;
            gap: var(--space-10);
            /* Generous spacing between groups */
            text-align: left;
        }

        .footer-brand {
            margin-bottom: var(--space-4);
        }

        .footer-mobile-group {
            /* Helper class if needed or just styling */
            break-inside: avoid;
        }
    }

    /* ================================================================
   UTILITY CLASSES
   ================================================================ */
    .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;
    }

    /* Toast Notification */
    .toast {
        position: fixed;
        bottom: var(--space-6);
        right: var(--space-6);
        padding: var(--space-3) var(--space-5);
        background: var(--color-success);
        color: white;
        border-radius: var(--radius-lg);
        font-size: var(--text-sm);
        font-weight: 500;
        opacity: 0;
        transform: translateY(20px);
        transition: all var(--transition-base);
        z-index: 1000;
    }

    .toast.show {
        opacity: 1;
        transform: translateY(0);
    }