/* ==========================================================================
   main.css - Global Design System for Loan Calculator Online
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Custom Properties
   -------------------------------------------------------------------------- */
:root {
    /* Primary: Deep indigo (warmer than #2563eb) */
    --primary: #3b49df;
    --primary-dark: #2f3ab1;
    --primary-light: #eef0ff;
    --primary-gradient: linear-gradient(135deg, #3b49df 0%, #5b6af0 100%);

    /* Secondary: Teal green */
    --secondary: #0d9488;
    --secondary-dark: #0f766e;
    --secondary-light: #e6faf7;

    /* Accent: Warm amber */
    --accent: #f59e0b;
    --accent-dark: #d97706;
    --accent-light: #fef3c7;

    /* Background layers */
    --bg: #f5f6fa;
    --bg-alt: #eef0f6;
    --surface: #ffffff;

    /* Text layers */
    --text: #1a1c2e;
    --text-light: #5a5e72;
    --text-lighter: #8a8ea0;

    /* Border layers */
    --border: #e4e6ef;
    --border-dark: #cdd0db;

    /* Status colors (keep similar but refined) */
    --error: #dc2626;
    --error-light: #fef2f2;
    --success: #16a34a;
    --success-light: #f0fdf4;
    --warning: #d97706;
    --warning-light: #fffbeb;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-family-display: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-family-mono: 'SF Mono', 'Fira Code', 'Fira Mono', 'Roboto Mono', 'Courier New', monospace;

    /* Font size tokens */
    --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;

    /* Line height tokens */
    --leading-tight: 1.2;
    --leading-snug: 1.35;
    --leading-normal: 1.6;
    --leading-relaxed: 1.7;

    /* Spacing scale */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-8: 32px;
    --space-10: 40px;
    --space-12: 48px;
    --space-16: 64px;

    /* Border radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);

    /* Breakpoints (for reference; actual media queries below) */
    --breakpoint-md: 768px;
    --breakpoint-lg: 1024px;

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

/* --------------------------------------------------------------------------
   CSS Reset
   -------------------------------------------------------------------------- */
*,
*::before,
*::after {
    box-sizing: border-box;
}

* {
    margin: 0;
    padding: 0;
}

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

body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text);
    background-color: var(--bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img,
picture,
video,
canvas,
svg {
    display: block;
    max-width: 100%;
}

input,
button,
textarea,
select {
    font: inherit;
}

p,
h1,
h2,
h3,
h4,
h5,
h6 {
    overflow-wrap: break-word;
}

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

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

ul,
ol {
    list-style: none;
}

table {
    border-collapse: collapse;
    border-spacing: 0;
}

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

.sr-only-focusable:focus {
    position: static;
    width: auto;
    height: auto;
    padding: inherit;
    margin: inherit;
    overflow: visible;
    clip: auto;
    white-space: normal;
}

/* --------------------------------------------------------------------------
   Icon System
   -------------------------------------------------------------------------- */
.icon {
    width: 1em;
    height: 1em;
    display: inline-block;
    vertical-align: -0.125em;
    flex-shrink: 0;
}

.icon-sm {
    width: 0.875em;
    height: 0.875em;
}

.icon-lg {
    width: 1.5em;
    height: 1.5em;
}

.icon-xl {
    width: 2em;
    height: 2em;
}

/* --------------------------------------------------------------------------
   Skip Navigation
   -------------------------------------------------------------------------- */
.skip-nav {
    position: absolute;
    top: -100%;
    left: var(--space-4);
    background: var(--primary);
    color: #fff;
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-sm);
    z-index: 10000;
    font-weight: 600;
    text-decoration: none;
}

.skip-nav:focus {
    top: var(--space-4);
    color: #fff;
}

/* --------------------------------------------------------------------------
   Layout
   -------------------------------------------------------------------------- */
.container {
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--space-5);
    padding-right: var(--space-5);
}

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

@media (min-width: 768px) {
    .grid-2col {
        grid-template-columns: 1fr 1fr;
    }
}

/* --------------------------------------------------------------------------
   Typography
   -------------------------------------------------------------------------- */
h1 {
    font-size: clamp(1.75rem, 5vw, 2.5rem);
    line-height: 1.2;
    font-weight: 800;
    color: var(--text);
    letter-spacing: -0.025em;
}

h2 {
    font-size: clamp(1.5rem, 4vw, 2rem);
    line-height: 1.25;
    font-weight: 700;
    color: var(--text);
    letter-spacing: -0.015em;
}

h3 {
    font-size: 1.5rem;
    line-height: 1.35;
    font-weight: 700;
    color: var(--text);
}

h4 {
    font-size: 1.25rem;
    line-height: 1.4;
    font-weight: 600;
    color: var(--text);
}

p {
    margin-bottom: var(--space-4);
    color: var(--text);
}

.text-sm {
    font-size: 0.875rem;
}

.text-lg {
    font-size: 1.125rem;
}

.text-xl {
    font-size: 1.25rem;
}

.text-muted {
    color: var(--text-light);
}

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

.text-mono {
    font-family: var(--font-family-mono);
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    font-size: 1rem;
    font-weight: 600;
    line-height: 1.5;
    text-align: center;
    text-decoration: none;
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
    user-select: none;
}

.btn:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Primary button */
.btn-primary,
.btn {
    background-color: var(--primary);
    color: #ffffff;
    border-color: var(--primary);
}

.btn-primary:hover,
.btn:hover {
    background-color: var(--primary-dark);
    border-color: var(--primary-dark);
    color: #ffffff;
    text-decoration: none;
    box-shadow: 0 4px 14px rgba(59,73,223,0.3);
    transform: translateY(-1px);
}

.btn-primary:active,
.btn:active {
    transform: translateY(1px);
}

/* Outline button */
.btn-outline {
    background-color: transparent;
    color: var(--primary);
    border-color: var(--primary);
}

.btn-outline:hover {
    background-color: var(--primary);
    color: #ffffff;
    text-decoration: none;
}

/* Secondary button */
.btn-secondary {
    background-color: var(--secondary);
    color: #ffffff;
    border-color: var(--secondary);
}

.btn-secondary:hover {
    background-color: var(--secondary-dark);
    border-color: var(--secondary-dark);
    color: #ffffff;
    text-decoration: none;
}

/* Small button */
.btn-sm {
    padding: var(--space-1) var(--space-3);
    font-size: 0.875rem;
    border-radius: var(--radius-sm);
}

/* Large button */
.btn-lg {
    padding: var(--space-4) var(--space-8);
    font-size: 1.125rem;
}

/* Button group */
.btn-group {
    display: flex;
    gap: var(--space-3);
    flex-wrap: wrap;
}

/* Ghost button */
.btn-ghost {
    background-color: transparent;
    color: var(--text-light);
    border-color: transparent;
}

.btn-ghost:hover {
    background-color: var(--bg);
    color: var(--text);
    border-color: var(--border);
    text-decoration: none;
    box-shadow: none;
    transform: translateY(-1px);
}

/* --------------------------------------------------------------------------
   Cards
   -------------------------------------------------------------------------- */
.card {
    background-color: var(--surface);
    box-shadow: var(--shadow-md);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.card-flat {
    background-color: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
}

/* --------------------------------------------------------------------------
   Header
   -------------------------------------------------------------------------- */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: var(--surface);
    box-shadow: var(--shadow-sm);
}

.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.site-logo {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text);
    text-decoration: none;
}

.site-logo:hover {
    color: var(--primary);
    text-decoration: none;
}

.site-logo svg,
.site-logo img {
    width: 32px;
    height: 32px;
}

/* Desktop navigation */
.main-nav {
    display: none;
}

.main-nav ul {
    display: flex;
    align-items: center;
    gap: var(--space-6);
}

.main-nav a {
    color: var(--text-light);
    font-size: 0.9375rem;
    font-weight: 500;
    text-decoration: none;
    padding: var(--space-2) 0;
    transition: color var(--transition-fast);
}

.main-nav a:hover,
.main-nav a.active {
    color: var(--primary);
    text-decoration: none;
}

@media (min-width: 768px) {
    .main-nav {
        display: flex;
    }
}

/* Mobile hamburger menu */
.menu-toggle {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    width: 44px;
    height: 44px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    color: var(--text);
}

.menu-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background-color: var(--text);
    border-radius: 1px;
    transition: all var(--transition-fast);
}

@media (min-width: 768px) {
    .menu-toggle {
        display: none;
    }
}

/* Mobile nav overlay */
.mobile-nav {
    display: none;
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--surface);
    z-index: 999;
    padding: var(--space-6) var(--space-5);
    overflow-y: auto;
}

.mobile-nav.is-open {
    display: block;
}

.mobile-nav ul {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.mobile-nav a {
    display: block;
    padding: var(--space-3) var(--space-4);
    color: var(--text);
    font-size: 1.125rem;
    font-weight: 500;
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: background-color var(--transition-fast);
}

.mobile-nav a:hover {
    background-color: var(--bg);
    color: var(--primary);
    text-decoration: none;
}

/* --------------------------------------------------------------------------
   Hero Section (Homepage)
   -------------------------------------------------------------------------- */
.hero {
    position: relative;
    background: linear-gradient(135deg, #1a1c2e 0%, #2f3ab1 50%, #3b49df 100%);
    padding: var(--space-16) 0;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(91,106,240,0.25) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(13,148,136,0.15) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.hero .container {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-8);
}

.hero-content {
    flex: 1;
    max-width: 640px;
}

.hero h1 {
    font-size: clamp(2rem, 6vw, 3.25rem);
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -0.03em;
    color: #ffffff;
    margin-bottom: var(--space-4);
}

.hero-subtitle {
    font-size: 1.25rem;
    line-height: 1.6;
    color: rgba(255,255,255,0.8);
    margin-bottom: var(--space-8);
    max-width: 520px;
}

.hero-actions {
    display: flex;
    gap: var(--space-4);
    flex-wrap: wrap;
}

.hero .btn-primary {
    background-color: #ffffff;
    color: var(--primary);
    border-color: #ffffff;
    font-weight: 700;
    padding: var(--space-4) var(--space-8);
    font-size: 1.0625rem;
    box-shadow: 0 4px 16px rgba(0,0,0,0.15);
}

.hero .btn-primary:hover {
    background-color: var(--primary-light);
    color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(0,0,0,0.2);
}

.hero .btn-outline {
    border-color: rgba(255,255,255,0.5);
    color: #ffffff;
    padding: var(--space-4) var(--space-8);
    font-size: 1.0625rem;
}

.hero .btn-outline:hover {
    background-color: rgba(255,255,255,0.1);
    border-color: #ffffff;
    color: #ffffff;
    text-decoration: none;
}

.hero-stats {
    display: flex;
    gap: var(--space-8);
    margin-top: var(--space-8);
    padding-top: var(--space-6);
    border-top: 1px solid rgba(255,255,255,0.15);
}

.hero-stat {
    text-align: left;
}

.hero-stat-value {
    font-size: 1.5rem;
    font-weight: 800;
    color: #ffffff;
    line-height: 1.2;
}

.hero-stat-label {
    font-size: 0.8125rem;
    color: rgba(255,255,255,0.6);
    margin-top: var(--space-1);
}

.hero-illustration {
    flex-shrink: 0;
    display: none;
    opacity: 0.08;
    width: 280px;
    height: 280px;
}

.hero-illustration svg {
    width: 100%;
    height: 100%;
    color: #ffffff;
}

@media (min-width: 768px) {
    .hero {
        padding: var(--space-16) 0;
    }
    .hero-illustration {
        display: block;
    }
}

@media (max-width: 767px) {
    .hero {
        padding: var(--space-10) 0;
        text-align: center;
    }
    .hero .container {
        flex-direction: column;
    }
    .hero-content {
        max-width: 100%;
    }
    .hero-subtitle {
        max-width: 100%;
    }
    .hero-actions {
        justify-content: center;
    }
    .hero-stats {
        justify-content: center;
        flex-wrap: wrap;
        gap: var(--space-6);
    }
    .hero-stat {
        text-align: center;
    }
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.site-footer {
    background-color: var(--text);
    color: #ffffff;
    padding: var(--space-12) 0 var(--space-6);
    margin-top: var(--space-16);
}

.site-footer .container {
    display: flex;
    flex-direction: column;
    gap: var(--space-8);
}

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

@media (min-width: 768px) {
    .footer-top {
        grid-template-columns: 2fr 1fr 1fr 1fr;
    }
}

.footer-brand {
    max-width: 320px;
}

.footer-brand p {
    color: #8a8ea0;
    font-size: 0.875rem;
    line-height: 1.7;
}

.footer-heading {
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #8a8ea0;
    margin-bottom: var(--space-4);
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.footer-links a {
    color: #cdd0db;
    font-size: 0.875rem;
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: #ffffff;
    text-decoration: none;
}

.footer-bottom {
    border-top: 1px solid #3a3d52;
    padding-top: var(--space-6);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-3);
    text-align: center;
}

@media (min-width: 768px) {
    .footer-bottom {
        flex-direction: row;
        justify-content: space-between;
    }
}

.footer-copyright {
    color: #8a8ea0;
    font-size: 0.8125rem;
}

.footer-bottom-links {
    display: flex;
    gap: var(--space-4);
}

.footer-bottom-links a {
    color: #8a8ea0;
    font-size: 0.8125rem;
    text-decoration: none;
}

.footer-bottom-links a:hover {
    color: #ffffff;
}

/* --------------------------------------------------------------------------
   Cookie Consent Banner
   -------------------------------------------------------------------------- */
.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 9999;
    background-color: var(--surface);
    box-shadow: 0 -4px 16px rgba(0, 0, 0, 0.12);
    padding: var(--space-4) var(--space-5);
    display: none;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
    flex-wrap: wrap;
}

.cookie-banner.active {
    display: flex;
}

.cookie-banner p {
    font-size: 0.875rem;
    color: var(--text-light);
    margin-bottom: 0;
    flex: 1 1 auto;
    min-width: 200px;
}

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

.cookie-banner .btn-group {
    flex-shrink: 0;
    display: flex;
    gap: var(--space-2);
    flex-wrap: wrap;
}

.cookie-banner .btn {
    font-size: 0.8125rem;
    padding: var(--space-2) var(--space-4);
}

/* Cookie customization modal */
.cookie-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-4);
}

.cookie-modal {
    background-color: var(--surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    max-width: 520px;
    width: 100%;
    max-height: 80vh;
    overflow-y: auto;
    padding: var(--space-6);
}

.cookie-modal h3 {
    margin-bottom: var(--space-4);
}

.cookie-category {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-3) 0;
    border-bottom: 1px solid var(--border);
}

.cookie-category:last-child {
    border-bottom: none;
}

.cookie-category-info h4 {
    font-size: 0.9375rem;
    font-weight: 600;
}

.cookie-category-info p {
    font-size: 0.8125rem;
    color: var(--text-light);
    margin-bottom: 0;
}

.cookie-toggle {
    position: relative;
    width: 44px;
    height: 24px;
    flex-shrink: 0;
}

.cookie-toggle input {
    opacity: 0;
    width: 0;
    height: 0;
}

.cookie-toggle-slider {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--border-dark);
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: background-color var(--transition-fast);
}

.cookie-toggle-slider::before {
    content: '';
    position: absolute;
    width: 18px;
    height: 18px;
    left: 3px;
    bottom: 3px;
    background-color: #ffffff;
    border-radius: 50%;
    transition: transform var(--transition-fast);
}

.cookie-toggle input:checked + .cookie-toggle-slider {
    background-color: var(--primary);
}

.cookie-toggle input:checked + .cookie-toggle-slider::before {
    transform: translateX(20px);
}

.cookie-toggle input:disabled + .cookie-toggle-slider {
    opacity: 0.5;
    cursor: not-allowed;
}

/* --------------------------------------------------------------------------
   Breadcrumb
   -------------------------------------------------------------------------- */
.breadcrumb {
    padding: var(--space-4) 0;
    font-size: 0.875rem;
}

.breadcrumb ol {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-1);
}

.breadcrumb li {
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

.breadcrumb li + li::before {
    content: '/';
    color: var(--text-lighter);
    margin-right: var(--space-1);
}

.breadcrumb a {
    color: var(--text-light);
    text-decoration: none;
}

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

.breadcrumb .current {
    color: var(--text);
    font-weight: 500;
}

/* --------------------------------------------------------------------------
   Page Header (Category Pages)
   -------------------------------------------------------------------------- */
.page-header {
    text-align: center;
    padding: var(--space-10) 0 var(--space-8);
}

.page-header h1 {
    margin-bottom: var(--space-4);
}

.page-header .page-subtitle {
    font-size: 1.125rem;
    color: var(--text-light);
    max-width: 640px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.6;
}

/* --------------------------------------------------------------------------
   Card Grid (Category Pages)
   -------------------------------------------------------------------------- */
.card-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-5);
    margin-bottom: var(--space-8);
}

@media (min-width: 480px) {
    .card-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (min-width: 768px) {
    .card-grid {
        grid-template-columns: 1fr 1fr 1fr;
    }
}

/* --------------------------------------------------------------------------
   Homepage Components
   -------------------------------------------------------------------------- */

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-6);
    margin: var(--space-8) 0;
}

@media (min-width: 480px) {
    .features-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (min-width: 768px) {
    .features-grid {
        grid-template-columns: 1fr 1fr 1fr;
    }
}

.feature-card {
    background-color: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    text-align: center;
    transition: all var(--transition-base);
}

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

.feature-card-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    background: var(--primary-light);
    color: var(--primary);
    border-radius: var(--radius-xl);
    margin-bottom: var(--space-4);
    transition: all var(--transition-fast);
}

.feature-card:hover .feature-card-icon {
    background: var(--primary);
    color: #ffffff;
}

.feature-card h3 {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: var(--space-2);
    color: var(--text);
}

.feature-card p {
    font-size: 0.875rem;
    color: var(--text-light);
    line-height: 1.6;
    margin-bottom: 0;
}

/* Category Navigation Cards */
.category-nav-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-4);
    margin: var(--space-8) 0;
}

@media (min-width: 480px) {
    .category-nav-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (min-width: 768px) {
    .category-nav-grid {
        grid-template-columns: 1fr 1fr 1fr;
    }
}

.category-nav-card {
    display: flex;
    align-items: flex-start;
    gap: var(--space-4);
    background-color: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--space-5);
    text-decoration: none;
    transition: all var(--transition-base);
}

.category-nav-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary);
    text-decoration: none;
}

.category-nav-card-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: var(--primary-light);
    color: var(--primary);
    border-radius: var(--radius-lg);
    flex-shrink: 0;
    font-size: 1.25rem;
    transition: all var(--transition-fast);
}

.category-nav-card:hover .category-nav-card-icon {
    background: var(--primary);
    color: #ffffff;
}

.category-nav-card-content {
    flex: 1;
    min-width: 0;
}

.category-nav-card-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: var(--space-1);
}

.category-nav-card-desc {
    font-size: 0.8125rem;
    color: var(--text-light);
    line-height: 1.5;
}

.category-nav-card-arrow {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    color: var(--text-lighter);
    flex-shrink: 0;
    align-self: center;
    transition: all var(--transition-fast);
}

.category-nav-card:hover .category-nav-card-arrow {
    color: var(--primary);
    transform: translateX(4px);
}

/* Trust Signals */
.trust-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-6);
    margin: var(--space-8) 0;
}

@media (min-width: 768px) {
    .trust-grid {
        grid-template-columns: 1fr 1fr 1fr 1fr;
    }
}

.trust-item {
    text-align: center;
    padding: var(--space-4);
}

.trust-item-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: var(--accent-light);
    color: var(--accent-dark);
    border-radius: var(--radius-full);
    margin-bottom: var(--space-3);
    font-size: 1.25rem;
}

.trust-item-title {
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: var(--space-1);
}

.trust-item-desc {
    font-size: 0.8125rem;
    color: var(--text-light);
    line-height: 1.5;
}

/* --------------------------------------------------------------------------
   Search Button in Header
   -------------------------------------------------------------------------- */
.nav-search-btn {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: var(--space-2) var(--space-3);
    color: var(--text-light);
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 500;
    transition: all var(--transition-fast);
    white-space: nowrap;
    line-height: 1;
}

.nav-search-btn:hover {
    background: var(--surface);
    border-color: var(--border-dark);
    color: var(--text);
}

.nav-search-btn .icon {
    width: 16px;
    height: 16px;
}

.nav-search-shortcut {
    display: none;
    font-size: 0.75rem;
    color: var(--text-lighter);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 3px;
    padding: 2px 5px;
    font-family: var(--font-family-mono);
}

@media (min-width: 768px) {
    .nav-search-shortcut {
        display: inline-block;
    }
}

@media (max-width: 767px) {
    .nav-search-btn {
        padding: var(--space-2);
        min-width: 36px;
        justify-content: center;
    }
    .nav-search-btn .icon {
        width: 18px;
        height: 18px;
    }
}

/* --------------------------------------------------------------------------
   Search Modal
   -------------------------------------------------------------------------- */
.search-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 10000;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding: 80px var(--space-4) var(--space-4);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-fast), visibility var(--transition-fast);
}

.search-modal-overlay.is-open {
    opacity: 1;
    visibility: visible;
}

body.search-open {
    overflow: hidden;
}

.search-modal {
    background-color: var(--surface);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    width: 100%;
    max-width: 560px;
    max-height: calc(100vh - 120px);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transform: translateY(-8px);
    transition: transform var(--transition-fast);
}

.search-modal-overlay.is-open .search-modal {
    transform: translateY(0);
}

/* Search input */
.search-input-wrap {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-5);
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}

.search-input-icon {
    width: 20px;
    height: 20px;
    color: var(--text-lighter);
    flex-shrink: 0;
}

.search-modal-input {
    flex: 1;
    border: none;
    outline: none;
    font-size: 1.0625rem;
    font-weight: 500;
    color: var(--text);
    background: transparent;
    line-height: 1.5;
}

.search-modal-input::placeholder {
    color: var(--text-lighter);
}

.search-kbd-hint {
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 28px;
    height: 22px;
    padding: 0 5px;
    font-size: 0.6875rem;
    font-weight: 500;
    font-family: var(--font-family-mono);
    color: var(--text-lighter);
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 3px;
}

/* Search results */
.search-results {
    overflow-y: auto;
    flex: 1;
    padding: var(--space-2);
}

.search-results.has-results {
    padding: var(--space-2);
}

/* Result group */
.search-result-group {
    margin-bottom: var(--space-1);
}

.search-result-category {
    padding: var(--space-2) var(--space-3);
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-lighter);
}

/* Result item */
.search-result-item {
    display: flex;
    flex-direction: column;
    gap: 2px;
    padding: var(--space-3) var(--space-3);
    border-radius: var(--radius-md);
    text-decoration: none;
    cursor: pointer;
    transition: background-color var(--transition-fast);
}

.search-result-item:hover,
.search-result-item.is-selected {
    background-color: var(--primary-light);
    text-decoration: none;
}

.search-result-name {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--text);
    line-height: 1.4;
}

.search-result-item:hover .search-result-name,
.search-result-item.is-selected .search-result-name {
    color: var(--primary-dark);
}

.search-result-desc {
    font-size: 0.8125rem;
    color: var(--text-light);
    line-height: 1.4;
}

/* Highlight matched text */
.search-result-name mark,
.search-result-desc mark {
    background-color: var(--accent-light);
    color: var(--accent-dark);
    border-radius: 2px;
    padding: 0 1px;
}

/* No results */
.search-empty {
    display: none;
    padding: var(--space-8) var(--space-5);
    text-align: center;
}

.search-empty-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: var(--space-2);
}

.search-empty-hint {
    font-size: 0.875rem;
    color: var(--text-light);
    line-height: 1.6;
    margin-bottom: 0;
}

.search-empty-hint a {
    color: var(--primary);
    font-weight: 500;
}

/* --------------------------------------------------------------------------
   Decorative Elements
   -------------------------------------------------------------------------- */
.bg-pattern-dots {
    background-image: radial-gradient(circle, var(--border) 1px, transparent 1px);
    background-size: 20px 20px;
}

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

.divider-gradient {
    height: 1px;
    background: linear-gradient(90deg, transparent 0%, var(--border-dark) 50%, transparent 100%);
    border: none;
    margin: var(--space-8) 0;
}

/* --------------------------------------------------------------------------
   Section Spacing Utilities
   -------------------------------------------------------------------------- */
.section {
    padding: var(--space-12) 0;
}

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

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

.section-title {
    margin-bottom: var(--space-2);
}

.section-subtitle {
    color: var(--text-light);
    font-size: 1.125rem;
    margin-bottom: var(--space-8);
}

/* --------------------------------------------------------------------------
   Utility Classes
   -------------------------------------------------------------------------- */
.flex {
    display: flex;
}

.flex-col {
    flex-direction: column;
}

.flex-wrap {
    flex-wrap: wrap;
}

.items-center {
    align-items: center;
}

.justify-center {
    justify-content: center;
}

.justify-between {
    justify-content: space-between;
}

.gap-2 {
    gap: var(--space-2);
}

.gap-4 {
    gap: var(--space-4);
}

.gap-6 {
    gap: var(--space-6);
}

.mt-4 {
    margin-top: var(--space-4);
}

.mt-6 {
    margin-top: var(--space-6);
}

.mt-8 {
    margin-top: var(--space-8);
}

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

.mb-6 {
    margin-bottom: var(--space-6);
}

.mb-8 {
    margin-bottom: var(--space-8);
}

.mx-auto {
    margin-left: auto;
    margin-right: auto;
}

.w-full {
    width: 100%;
}

.max-w-prose {
    max-width: 65ch;
}

.hidden {
    display: none;
}

/* --------------------------------------------------------------------------
   Responsive Adjustments
   -------------------------------------------------------------------------- */
@media (max-width: 767px) {
    h1 {
        font-size: 2rem;
        line-height: 2.4;
    }

    h2 {
        font-size: 1.5rem;
        line-height: 1.8;
    }

    h3 {
        font-size: 1.25rem;
        line-height: 1.6;
    }

    .container {
        padding-left: var(--space-4);
        padding-right: var(--space-4);
    }

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

    .section-lg {
        padding: var(--space-10) 0;
    }
}

@media (min-width: 768px) and (max-width: 1023px) {
    .container {
        max-width: 100%;
    }
}