/* ================================================================
   [SITE_NAME] — Cameroonian Heritage Archive
   Main Stylesheet
   Built for Cloudflare Pages static site
   ================================================================ */

/* --- CSS Custom Properties (Design Tokens) --- */
:root {
    /* Colors */
    --color-primary: #6d4aff;
    --color-primary-dark: #4a2f9e;
    --color-primary-light: #9b7eff;
    --color-accent: #d4a017;
    --color-accent-light: #f0c447;

    --color-text: #1a1a2e;
    --color-text-light: #555;
    --color-text-muted: #888;
    --color-bg: #ffffff;
    --color-bg-alt: #f8f7fc;
    --color-bg-dark: #1a1a2e;
    --color-border: #e0dde8;
    --color-border-dark: #c4bfd4;

    /* Typography */
    --font-body: 'Noto Sans', 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
    --font-heading: 'Noto Serif', Georgia, 'Times New Roman', serif;
    --font-ipa: 'Doulos SIL', 'Charis SIL', 'Noto Sans', 'Segoe UI', sans-serif;

    /* Sizing */
    --container-max: 1200px;
    --container-narrow: 800px;
    --header-height: 72px;

    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 2rem;
    --space-lg: 3rem;
    --space-xl: 5rem;

    /* Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.12);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-med: 300ms ease;
}

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

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

body {
    font-family: var(--font-body);
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.25;
    color: var(--color-text);
    margin-bottom: var(--space-sm);
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.25rem); }
h3 { font-size: clamp(1.15rem, 2vw, 1.5rem); }

p { margin-bottom: var(--space-sm); }

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

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

ul { list-style: none; }

/* --- Accessibility --- */
.skip-link {
    position: absolute;
    top: -100px;
    left: 0;
    background: var(--color-primary);
    color: white;
    padding: var(--space-sm) var(--space-md);
    z-index: 1000;
    border-radius: 0 0 var(--radius-md) 0;
    transition: top var(--transition-fast);
}
.skip-link:focus { top: 0; }

.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;
}

:focus-visible {
    outline: 3px solid var(--color-primary-light);
    outline-offset: 2px;
}

/* --- Layout Utilities --- */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.container-narrow {
    max-width: var(--container-narrow);
    margin: 0 auto;
    padding: 0 var(--space-md);
}

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

.section-title {
    text-align: center;
    margin-bottom: var(--space-lg);
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: var(--color-primary);
    border-radius: 2px;
    margin: var(--space-sm) auto 0;
}

/* --- Buttons --- */
.btn {
    display: inline-block;
    padding: 0.75rem 1.75rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-family: var(--font-body);
    font-size: 1rem;
    cursor: pointer;
    border: 2px solid transparent;
    transition: all var(--transition-fast);
    text-align: center;
    line-height: 1.2;
}

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

.btn-secondary {
    background: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
}
.btn-secondary:hover {
    background: var(--color-primary);
    color: white;
}

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

.btn-large {
    padding: 1rem 2.5rem;
    font-size: 1.1rem;
}

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

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

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--color-text);
    flex-shrink: 0;
}
.logo:hover { color: var(--color-primary); }

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

/* --- Navigation --- */
.main-nav {
    flex-grow: 1;
    display: flex;
    justify-content: center;
}

.nav-list {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.nav-link {
    display: block;
    padding: 0.5rem 1rem;
    color: var(--color-text);
    font-weight: 600;
    font-size: 0.95rem;
    border-radius: var(--radius-sm);
    background: none;
    border: none;
    cursor: pointer;
    font-family: var(--font-body);
    transition: all var(--transition-fast);
}
.nav-link:hover {
    color: var(--color-primary);
    background: var(--color-bg-alt);
}

.nav-cta {
    background: var(--color-primary);
    color: white !important;
    padding: 0.5rem 1.5rem;
    border-radius: var(--radius-md);
}
.nav-cta:hover {
    background: var(--color-primary-dark);
    color: white;
}

/* Dropdown */
.nav-dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 220px;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    padding: var(--space-xs);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-fast);
    z-index: 110;
}

.dropdown-menu li a {
    display: block;
    padding: 0.5rem 1rem;
    color: var(--color-text);
    font-size: 0.9rem;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}
.dropdown-menu li a:hover {
    background: var(--color-bg-alt);
    color: var(--color-primary);
}

.nav-dropdown:hover .dropdown-menu,
.nav-dropdown:focus-within .dropdown-menu,
.dropdown-menu.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

/* --- Header Actions --- */
.header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    flex-shrink: 0;
}

.lang-toggle {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.4rem 0.85rem;
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    font-family: var(--font-body);
    transition: all var(--transition-fast);
}
.lang-toggle:hover {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

/* Hamburger */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.hamburger-line {
    width: 24px;
    height: 3px;
    background: var(--color-text);
    border-radius: 2px;
    transition: all var(--transition-fast);
}

.hamburger.active .hamburger-line:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}
.hamburger.active .hamburger-line:nth-child(2) {
    opacity: 0;
}
.hamburger.active .hamburger-line:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* --- Hero Section --- */
.hero {
    background: linear-gradient(135deg, var(--color-bg-alt) 0%, #ede9fc 100%);
    padding: var(--space-xl) var(--space-md);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(109, 74, 255, 0.05) 0%, transparent 70%);
    pointer-events: none;
}

.hero-inner {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    margin-bottom: var(--space-md);
    color: var(--color-text);
}

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--color-text-light);
    margin-bottom: var(--space-sm);
}

.hero-cta-text {
    font-size: 1rem;
    color: var(--color-text-light);
    margin-bottom: var(--space-md);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

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

/* --- About Section --- */
.about-section { background: var(--color-bg); }

.about-content {
    max-width: var(--container-narrow);
    margin: 0 auto var(--space-lg);
}

.about-content p {
    font-size: 1.05rem;
    color: var(--color-text-light);
}

.principles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-md);
    max-width: var(--container-max);
    margin: 0 auto;
}

.principle-card {
    background: var(--color-bg-alt);
    border-radius: var(--radius-lg);
    padding: var(--space-md);
    border: 1px solid var(--color-border);
    transition: all var(--transition-med);
}

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

.principle-card h3 {
    color: var(--color-primary);
    margin-bottom: var(--space-sm);
}

.principle-card p {
    color: var(--color-text-light);
    font-size: 0.95rem;
}

/* --- Crossroads Section --- */
.crossroads-section {
    background: var(--color-bg-alt);
}

.crossroads-section .container {
    max-width: var(--container-narrow);
}

.crossroads-section p {
    font-size: 1.05rem;
    color: var(--color-text-light);
}

.crossroads-callout {
    font-family: var(--font-heading);
    font-size: 1.3rem !important;
    font-weight: 600;
    color: var(--color-primary);
    text-align: center;
    padding: var(--space-md);
    margin-top: var(--space-md);
    border-left: 4px solid var(--color-accent);
    border-right: 4px solid var(--color-accent);
    border-radius: var(--radius-sm);
    background: var(--color-bg);
}

/* --- Collections Section --- */
.collections-section { background: var(--color-bg); }

.collections-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-md);
}

.collection-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: all var(--transition-med);
}

.collection-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-6px);
}

.collection-image {
    width: 100%;
    height: 200px;
    background: var(--color-bg-alt);
    overflow: hidden;
}

.collection-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.collection-body {
    padding: var(--space-md);
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.collection-body h3 {
    margin-bottom: var(--space-sm);
    color: var(--color-text);
}

.collection-body p {
    color: var(--color-text-light);
    font-size: 0.95rem;
    flex-grow: 1;
}

.collection-featured {
    margin: var(--space-sm) 0;
    padding: var(--space-sm);
    background: var(--color-bg-alt);
    border-radius: var(--radius-sm);