/* ═══════════════════════════════════════════════════
   CML Starter Theme — Modern, Clean, Responsive
   ═══════════════════════════════════════════════════ */

:root {
    --color-primary: #2563eb;
    --color-primary-dark: #1d4ed8;
    --color-text: #1e293b;
    --color-text-light: #64748b;
    --color-bg: #ffffff;
    --color-bg-alt: #f8fafc;
    --color-border: #e2e8f0;
    --color-accent: #f59e0b;
    --font-family: 'Inter', system-ui, -apple-system, sans-serif;
    --max-width: 1100px;
    --header-height: 72px;
    --radius: 8px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
    --transition: 0.2s ease;
}

/* ── Reset ─────────────────────────── */

*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-text);
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-primary-dark); }

/* ── Container ──────────────────────── */

.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* ── Header ─────────────────────────── */

.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255,255,255,0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    height: var(--header-height);
}

.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.site-logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text);
    letter-spacing: -0.02em;
}

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

/* ── Navigation ────────────────────── */

.nav-list {
    list-style: none;
    display: flex;
    gap: 4px;
}

.nav-list > li {
    position: relative;
}

.nav-list a {
    display: inline-block;
    padding: 8px 16px;
    border-radius: var(--radius);
    color: var(--color-text-light);
    font-size: 0.9rem;
    font-weight: 500;
    transition: all var(--transition);
}

.nav-list a:hover {
    color: var(--color-text);
    background: var(--color-bg-alt);
}

.nav-list a.active {
    color: var(--color-primary);
    background: rgba(37,99,235,0.08);
}

/* ── Dropdown ─────────────────────── */

.nav-dropdown {
    list-style: none;
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 200px;
    background: white;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: 0 8px 24px rgba(0,0,0,0.1);
    padding: 4px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(4px);
    transition: all 0.2s ease;
    z-index: 200;
}

.has-dropdown:hover > .nav-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.nav-dropdown li {
    margin: 0;
}

.nav-dropdown a {
    display: block;
    padding: 8px 12px;
    border-radius: calc(var(--radius) - 2px);
    font-size: 0.85rem;
    white-space: nowrap;
}

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

.nav-dropdown a.active {
    color: var(--color-primary);
    background: rgba(37,99,235,0.08);
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    flex-direction: column;
    gap: 5px;
}

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

/* ── Main ───────────────────────────── */

.site-main {
    flex: 1;
}

/* ── Page ───────────────────────────── */

.page {
    padding: 64px 0;
}

.page h1 {
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.2;
    margin-bottom: 32px;
    color: var(--color-text);
}

.page-content {
    font-size: 1.05rem;
    color: var(--color-text);
    line-height: 1.8;
}

.page-content h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin: 2.5rem 0 1rem;
    letter-spacing: -0.02em;
}

.page-content h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin: 2rem 0 0.75rem;
}

.page-content p {
    margin-bottom: 1.25rem;
}

.page-content ul, .page-content ol {
    margin: 1rem 0 1.5rem 1.5rem;
}

.page-content li {
    margin-bottom: 0.5rem;
}

.page-content blockquote {
    border-left: 3px solid var(--color-primary);
    padding: 1rem 1.5rem;
    margin: 1.5rem 0;
    background: var(--color-bg-alt);
    border-radius: 0 var(--radius) var(--radius) 0;
    font-style: italic;
    color: var(--color-text-light);
}

.page-content img {
    border-radius: var(--radius);
    margin: 1.5rem 0;
    box-shadow: var(--shadow-md);
}

/* ── Hero (homepage) ────────────────── */

.hero {
    padding: 100px 0 80px;
    background: linear-gradient(135deg, #f0f4ff 0%, #e0e7ff 100%);
    text-align: center;
}

.hero h1 {
    font-size: 3rem;
    font-weight: 800;
    letter-spacing: -0.04em;
    line-height: 1.15;
    margin-bottom: 24px;
    background: linear-gradient(135deg, var(--color-primary), #7c3aed);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-text {
    max-width: 640px;
    margin: 0 auto;
    font-size: 1.15rem;
    color: var(--color-text-light);
    line-height: 1.8;
}

.hero-text p {
    margin-bottom: 1rem;
}

/* ── 404 ────────────────────────────── */

.page-404 {
    text-align: center;
    padding: 120px 0;
}

.page-404 h1 {
    font-size: 6rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--color-primary), #7c3aed);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 16px;
}

.page-404 .lead {
    font-size: 1.2rem;
    color: var(--color-text-light);
    margin-bottom: 32px;
}

/* ── Buttons ────────────────────────── */

.btn {
    display: inline-block;
    padding: 12px 28px;
    background: var(--color-primary);
    color: #fff;
    border: none;
    border-radius: var(--radius);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
}

.btn:hover {
    background: var(--color-primary-dark);
    color: #fff;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* ── Paragraphs ─────────────────────── */

.paragraph {
    margin-bottom: 2.5rem;
}

.paragraph:last-child {
    margin-bottom: 0;
}

.paragraph-content {
    font-size: 1.05rem;
    color: var(--color-text);
    line-height: 1.8;
}

.paragraph-content h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin: 2.5rem 0 1rem;
    letter-spacing: -0.02em;
}

.paragraph-content h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin: 2rem 0 0.75rem;
}

.paragraph-content p {
    margin-bottom: 1.25rem;
}

.paragraph-content blockquote {
    border-left: 3px solid var(--color-primary);
    padding: 1rem 1.5rem;
    margin: 1.5rem 0;
    background: var(--color-bg-alt);
    border-radius: 0 var(--radius) var(--radius) 0;
    font-style: italic;
    color: var(--color-text-light);
}

.paragraph-content img {
    border-radius: var(--radius);
    margin: 1.5rem 0;
    box-shadow: var(--shadow-md);
}

.paragraph-content ul, .paragraph-content ol {
    margin: 1rem 0 1.5rem 1.5rem;
}

.paragraph-content li {
    margin-bottom: 0.5rem;
}

.page-paragraphs {
    padding: 48px 0;
}

/* ── Gallery grid ──────────────────── */

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 12px;
    margin: 1.5rem 0;
}

.gallery-grid--large {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 16px;
}

.gallery-item {
    position: relative;
    overflow: hidden;
    border-radius: var(--radius);
    background: var(--color-bg-alt);
    aspect-ratio: 1;
}

.gallery-link {
    display: block;
    width: 100%;
    height: 100%;
}

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

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

/* ── Article detail ────────────────── */

.article-detail {
    padding: 64px 0;
}

.article-detail h1 {
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.2;
    margin-bottom: 24px;
}

.article-hero {
    margin-bottom: 32px;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.article-hero-img {
    width: 100%;
    max-height: 480px;
    object-fit: cover;
}

.article-intro {
    font-size: 1.15rem;
    color: var(--color-text-light);
    line-height: 1.8;
    margin-bottom: 32px;
    border-left: 3px solid var(--color-primary);
    padding-left: 20px;
}

/* ── Gallery detail ────────────────── */

.gallery-detail {
    padding: 64px 0;
}

.gallery-detail h1 {
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.2;
    margin-bottom: 24px;
}

.gallery-intro {
    font-size: 1.05rem;
    color: var(--color-text-light);
    line-height: 1.8;
    margin-bottom: 32px;
}

.gallery-description {
    margin-bottom: 32px;
    font-size: 1.05rem;
    line-height: 1.8;
}

/* ── Footer ─────────────────────────── */

.site-footer {
    background: var(--color-bg-alt);
    border-top: 1px solid var(--color-border);
    padding: 32px 0;
    text-align: center;
    color: var(--color-text-light);
    font-size: 0.875rem;
}

.site-footer a {
    color: var(--color-text-light);
    transition: color var(--transition);
}

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

.footer-contact {
    margin-top: 8px;
}

/* ── Responsive ────────────────────── */

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

    .site-nav .nav-list {
        display: none;
        position: absolute;
        top: var(--header-height);
        left: 0;
        right: 0;
        background: var(--color-bg);
        flex-direction: column;
        padding: 16px 24px;
        border-bottom: 1px solid var(--color-border);
        box-shadow: var(--shadow-md);
    }

    .site-nav.open .nav-list {
        display: flex;
    }

    .nav-list a {
        padding: 12px 16px;
        width: 100%;
    }

    .page h1,
    .article-detail h1,
    .gallery-detail h1 {
        font-size: 1.75rem;
    }

    .hero {
        padding: 64px 0 48px;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .page {
        padding: 40px 0;
    }

    .gallery-grid {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
        gap: 8px;
    }
}

/* ── Lightbox ──────────────────────── */

.lightbox-overlay {
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: rgba(0, 0, 0, 0.92);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.lightbox-overlay.active {
    opacity: 1;
    visibility: visible;
}

.lightbox-content {
    position: relative;
    max-width: 90vw;
    max-height: 85vh;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.lightbox-img {
    max-width: 90vw;
    max-height: 80vh;
    object-fit: contain;
    border-radius: var(--radius);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
    transition: opacity 0.2s ease;
}

.lightbox-caption {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9rem;
    margin-top: 12px;
    text-align: center;
    max-width: 600px;
}

.lightbox-counter {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.8rem;
    margin-top: 4px;
}

.lightbox-close {
    position: fixed;
    top: 16px;
    right: 20px;
    background: none;
    border: none;
    color: white;
    font-size: 2.5rem;
    cursor: pointer;
    line-height: 1;
    opacity: 0.7;
    transition: opacity var(--transition);
    z-index: 10;
}

.lightbox-close:hover {
    opacity: 1;
}

.lightbox-prev,
.lightbox-next {
    position: fixed;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.1);
    border: none;
    color: white;
    font-size: 2.5rem;
    cursor: pointer;
    padding: 8px 16px;
    border-radius: var(--radius);
    opacity: 0.6;
    transition: all var(--transition);
    z-index: 10;
}

.lightbox-prev { left: 16px; }
.lightbox-next { right: 16px; }

.lightbox-prev:hover,
.lightbox-next:hover {
    opacity: 1;
    background: rgba(255, 255, 255, 0.2);
}

@media (max-width: 768px) {
    .lightbox-prev,
    .lightbox-next {
        font-size: 1.5rem;
        padding: 6px 12px;
    }

    .lightbox-close {
        font-size: 2rem;
        top: 8px;
        right: 12px;
    }
}

/* ── Breadcrumbs ── */
.breadcrumbs {
    background: var(--bg-secondary, #f5f5f7);
    border-bottom: 1px solid var(--border-color, #e5e5e7);
    padding: 0.6rem 0;
    font-size: 0.85rem;
}

.breadcrumb-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem;
    align-items: center;
}

.breadcrumb-item + .breadcrumb-item::before {
    content: "›";
    margin-right: 0.4rem;
    color: var(--text-muted, #999);
}

.breadcrumb-item a {
    color: var(--text-muted, #666);
    text-decoration: none;
    transition: color 0.15s;
}

.breadcrumb-item a:hover {
    color: var(--primary, #2563eb);
    text-decoration: underline;
}

.breadcrumb-item.active span {
    color: var(--text-primary, #333);
    font-weight: 500;
}