/* ==========================================================================
   CSS Variables & Custom Properties
   ========================================================================== */
:root {
    /* Brand Colors */
    --clr-primary: #4A78B5;
    --clr-primary-dark: #375b8a;
    --clr-primary-light: #ebf2fa;
    --clr-accent: #38bdf8;
    
    /* Neutral Colors */
    --clr-bg: #f8fafc;
    --clr-surface: #ffffff;
    --clr-text-main: #334155;
    --clr-text-heading: #0f172a;
    --clr-text-muted: #64748b;
    --clr-border: #e2e8f0;
    
    /* State Colors */
    --clr-error: #ef4444;
    --clr-error-bg: #fef2f2;
    --clr-success: #10b981;
    --clr-success-bg: #ecfdf5;

    /* Typography */
    --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --line-height-body: 1.6;
    --line-height-heading: 1.2;

    /* Spacing & Layout */
    --container-max-width: 1200px;
    --article-max-width: 800px;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2.5rem;
    --spacing-xl: 4rem;

    /* UI Elements */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --transition: 0.3s ease;
}

/* ==========================================================================
   Reset & Base Styles
   ========================================================================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

body {
    font-family: var(--font-sans);
    color: var(--clr-text-main);
    background-color: var(--clr-bg);
    line-height: var(--line-height-body);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

h1, h2, h3, h4, h5, h6 {
    color: var(--clr-text-heading);
    line-height: var(--line-height-heading);
    font-weight: 700;
}

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

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

img, svg {
    display: block;
    max-width: 100%;
    height: auto;
}

ul, ol {
    list-style: none;
}

[hidden] {
    display: none !important;
}

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

@media (min-width: 768px) {
    .container {
        padding: 0 var(--spacing-md);
    }
}

.page-content {
    flex: 1 0 auto;
    padding: var(--spacing-lg) 0;
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn-primary, .btn-outline, .btn-text {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition);
    font-family: inherit;
    border: none;
    font-size: 1rem;
}

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

.btn-primary:hover {
    background-color: var(--clr-primary-dark);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-outline {
    background-color: transparent;
    color: var(--clr-text-heading);
    border: 2px solid var(--clr-border);
}

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

.btn-text {
    padding: 0;
    color: var(--clr-primary);
    background: none;
    font-weight: 600;
}

.btn-text:hover {
    color: var(--clr-primary-dark);
    transform: translateX(4px);
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.site-header {
    background-color: var(--clr-surface);
    border-bottom: 1px solid var(--clr-border);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.header-container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: var(--spacing-sm) var(--spacing-sm);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--clr-primary);
}

.brand-name {
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--clr-text-heading);
    letter-spacing: -0.02em;
}

.mobile-nav-toggle {
    display: block;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    z-index: 101;
}

.hamburger-line {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--clr-text-heading);
    margin: 5px 0;
    transition: var(--transition);
}

.primary-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background-color: var(--clr-surface);
    border-bottom: 1px solid var(--clr-border);
    box-shadow: var(--shadow-md);
}

/* This class would be toggled by JS */
.primary-nav.is-open {
    display: block;
}

.nav-list {
    display: flex;
    flex-direction: column;
}

.nav-list li a {
    display: block;
    padding: 1rem var(--spacing-sm);
    color: var(--clr-text-main);
    font-weight: 500;
    border-bottom: 1px solid var(--clr-border);
}

.nav-list li a:hover,
.nav-list li a[aria-current="page"] {
    color: var(--clr-primary);
    background-color: var(--clr-primary-light);
}

@media (min-width: 768px) {
    .header-container {
        padding: 1.25rem var(--spacing-md);
    }
    
    .mobile-nav-toggle {
        display: none;
    }

    .primary-nav {
        display: block;
        position: static;
        width: auto;
        border: none;
        box-shadow: none;
    }

    .nav-list {
        flex-direction: row;
        gap: 1.5rem;
    }

    .nav-list li a {
        padding: 0;
        border: none;
    }

    .nav-list li a:hover,
    .nav-list li a[aria-current="page"] {
        background-color: transparent;
        position: relative;
    }

    .nav-list li a[aria-current="page"]::after {
        content: '';
        position: absolute;
        bottom: -4px;
        left: 0;
        width: 100%;
        height: 2px;
        background-color: var(--clr-primary);
    }
}

/* ==========================================================================
   Homepage - Hero Section
   ========================================================================== */
.hero-section {
    background: linear-gradient(135deg, var(--clr-primary-dark) 0%, var(--clr-primary) 100%);
    color: white;
    padding: var(--spacing-xl) var(--spacing-sm);
    text-align: center;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero-content h1 {
    color: white;
    font-size: clamp(2.5rem, 5vw, 4rem);
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.02em;
}

.hero-content p {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.9;
    max-width: 600px;
    margin-inline: auto;
}

/* ==========================================================================
   Homepage - Guides Section (Cards)
   ========================================================================== */
.guides-section {
    padding: var(--spacing-xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    max-width: 600px;
    margin-inline: auto;
}

.section-header h2 {
    font-size: 2rem;
    margin-bottom: var(--spacing-xs);
}

.section-header p {
    color: var(--clr-text-muted);
    font-size: 1.125rem;
}

.card-grid {
    display: grid;
    gap: var(--spacing-md);
}

@media (min-width: 1024px) {
    .card-grid {
        gap: var(--spacing-lg);
    }
}

.card-horizontal {
    display: flex;
    flex-direction: column;
    background-color: var(--clr-surface);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--clr-border);
    transition: box-shadow var(--transition), transform var(--transition);
}

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

.card-image {
    width: 100%;
    height: 200px;
    background-color: var(--clr-border); /* Fallback */
    overflow: hidden;
}

.card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.card-horizontal:hover .card-image img {
    transform: scale(1.05);
}

.card-content {
    padding: var(--spacing-md);
    display: flex;
    flex-direction: column;
    flex: 1;
}

.card-tags {
    display: flex;
    gap: 0.5rem;
    margin-bottom: var(--spacing-sm);
    flex-wrap: wrap;
}

.tag {
    background-color: var(--clr-primary-light);
    color: var(--clr-primary-dark);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    letter-spacing: 0.05em;
}

.card-content h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
}

.card-content h3 a {
    color: var(--clr-text-heading);
}

.card-content h3 a:hover {
    color: var(--clr-primary);
}

.card-content p {
    color: var(--clr-text-muted);
    margin-bottom: var(--spacing-md);
    flex: 1;
}

@media (min-width: 768px) {
    .card-horizontal {
        flex-direction: row;
        align-items: stretch;
    }

    .card-image {
        width: 35%;
        height: auto;
        min-height: 250px;
    }

    .card-content {
        width: 65%;
        padding: var(--spacing-lg);
    }
}

/* ==========================================================================
   Homepage - Supporting Section
   ========================================================================== */
.supporting-section {
    background-color: var(--clr-surface);
    padding: var(--spacing-xl) 0;
    border-top: 1px solid var(--clr-border);
}

.supporting-grid {
    display: grid;
    gap: var(--spacing-lg);
}

.supporting-text h2 {
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
}

.supporting-text p {
    margin-bottom: var(--spacing-sm);
    color: var(--clr-text-muted);
    font-size: 1.05rem;
}

.supporting-stats {
    display: grid;
    gap: var(--spacing-md);
    grid-template-columns: 1fr;
}

.stat-box {
    background-color: var(--clr-bg);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    text-align: center;
    border: 1px solid var(--clr-border);
}

.stat-number {
    display: block;
    font-size: 3rem;
    font-weight: 800;
    color: var(--clr-primary);
    line-height: 1;
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--clr-text-heading);
    font-weight: 500;
}

@media (min-width: 1024px) {
    .supporting-grid {
        grid-template-columns: 3fr 2fr;
        align-items: center;
    }
    .supporting-stats {
        grid-template-columns: 1fr;
    }
}

/* ==========================================================================
   Article Pages (Guides, Legal)
   ========================================================================== */
.article-container {
    max-width: var(--article-max-width);
    background-color: var(--clr-surface);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--clr-border);
}

@media (max-width: 767px) {
    .article-container {
        padding: var(--spacing-md);
        border: none;
        border-radius: 0;
        box-shadow: none;
        background-color: transparent;
    }
}

.article-header {
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--clr-border);
}

.article-header h1 {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.02em;
}

.article-header .lead {
    font-size: 1.25rem;
    color: var(--clr-text-muted);
}

.article-body h2 {
    font-size: 1.75rem;
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
    color: var(--clr-primary-dark);
}

.article-body p {
    margin-bottom: var(--spacing-md);
    font-size: 1.05rem;
}

.article-body ul, .article-body ol {
    margin-bottom: var(--spacing-md);
    padding-left: 1.5rem;
    font-size: 1.05rem;
}

.article-body li {
    margin-bottom: 0.5rem;
}

.article-body strong {
    color: var(--clr-text-heading);
}

.math-block {
    font-family: monospace;
    font-size: 1.1rem;
    text-align: center;
    color: var(--clr-primary-dark);
}

/* ==========================================================================
   Tables (Cookie Policy)
   ========================================================================== */
.table-wrapper {
    overflow-x: auto;
    margin: var(--spacing-md) 0;
    border-radius: var(--radius-md);
    border: 1px solid var(--clr-border);
}

.cookie-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

.cookie-table th, 
.cookie-table td {
    padding: 1rem;
    border-bottom: 1px solid var(--clr-border);
}

.cookie-table th {
    background-color: var(--clr-bg);
    font-weight: 700;
    color: var(--clr-text-heading);
}

.cookie-table tr:last-child td {
    border-bottom: none;
}

/* ==========================================================================
   Contact Page
   ========================================================================== */
.contact-grid {
    display: grid;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-md);
}

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

.contact-info-panel, 
.contact-form-panel {
    background-color: var(--clr-surface);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--clr-border);
    box-shadow: var(--shadow-sm);
}

.contact-info-panel h3 {
    margin-bottom: var(--spacing-md);
    font-size: 1.5rem;
}

.business-address {
    font-style: normal;
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
    color: var(--clr-text-muted);
}

.business-address strong {
    color: var(--clr-text-heading);
}

.contact-info-panel p {
    margin-bottom: var(--spacing-sm);
}

.static-map-block {
    margin-top: var(--spacing-md);
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--clr-border);
    aspect-ratio: 4/3;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--clr-text-heading);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--clr-border);
    border-radius: var(--radius-sm);
    background-color: var(--clr-bg);
    font-family: inherit;
    font-size: 1rem;
    color: var(--clr-text-main);
    transition: border-color var(--transition), box-shadow var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--clr-primary);
    box-shadow: 0 0 0 3px rgba(74, 120, 181, 0.1);
}

.error-message {
    display: block;
    color: var(--clr-error);
    font-size: 0.875rem;
    margin-top: 0.5rem;
}

.form-success-state {
    margin-top: var(--spacing-md);
    padding: 1rem;
    background-color: var(--clr-success-bg);
    color: var(--clr-success);
    border: 1px solid var(--clr-success);
    border-radius: var(--radius-md);
    font-weight: 500;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
    background-color: var(--clr-text-heading);
    color: var(--clr-border);
    padding: var(--spacing-xl) 0 var(--spacing-md) 0;
    margin-top: auto;
}

.footer-grid {
    display: grid;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

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

.footer-brand .brand-name {
    color: white;
    margin-bottom: var(--spacing-sm);
    display: inline-block;
}

.footer-brand p {
    color: #94a3b8;
    margin-bottom: var(--spacing-sm);
    font-size: 0.95rem;
}

.footer-brand a {
    color: var(--clr-accent);
}

.footer-links h4 {
    color: white;
    margin-bottom: var(--spacing-sm);
    font-size: 1.125rem;
}

.footer-links ul li {
    margin-bottom: 0.5rem;
}

.footer-links a {
    color: #94a3b8;
}

.footer-links a:hover {
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #64748b;
    font-size: 0.875rem;
}

/* ==========================================================================
   Cookie Banner
   ========================================================================== */
.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background-color: var(--clr-surface);
    border-top: 1px solid var(--clr-border);
    box-shadow: 0 -4px 6px -1px rgb(0 0 0 / 0.1);
    z-index: 1000;
    padding: var(--spacing-md);
}

.cookie-content {
    max-width: var(--container-max-width);
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.cookie-content p {
    font-size: 0.95rem;
}

.cookie-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.cookie-actions button {
    font-size: 0.875rem;
    padding: 0.5rem 1rem;
}

@media (min-width: 768px) {
    .cookie-content {
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
    }
    
    .cookie-content p {
        flex: 1;
        margin-right: var(--spacing-lg);
    }
}