/* =============================================
   白日做梦 — 现代诗博客站
   浪漫 · 极简 · 诗意
   ============================================= */

/* ----- CSS Variables ----- */
:root {
    --color-bg: #faf7f5;
    --color-bg-warm: #f5f0ec;
    --color-text: #2c2c2c;
    --color-text-light: #7a6f6a;
    --color-text-muted: #b5aaa4;
    --color-primary: #c45a6c;
    --color-primary-light: #e8a0ae;
    --color-primary-dark: #a33e50;
    --color-accent: #d4a574;
    --color-accent-light: #ecd4b8;
    --color-border: #e8ddd6;
    --color-card-bg: rgba(255, 255, 255, 0.85);
    --color-card-shadow: rgba(120, 80, 70, 0.08);
    --color-hero-start: #f5e6df;
    --color-hero-end: #e8d5ce;
    --color-white: #ffffff;

    --font-serif: 'Noto Serif SC', Georgia, 'Times New Roman', serif;
    --font-sans: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --max-width: 720px;
    --max-width-wide: 1080px;
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    font-weight: 300;
    font-size: 16px;
    line-height: 1.8;
    color: var(--color-text);
    background: var(--color-bg);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

main {
    flex: 1;
}

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

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

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

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

/* ----- Typography ----- */
h1, h2, h3, h4 {
    font-family: var(--font-serif);
    font-weight: 600;
    line-height: 1.4;
    color: var(--color-text);
}

/* =============================================
   HEADER
   ============================================= */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(250, 247, 245, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
}

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

.site-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-serif);
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--color-primary-dark);
}

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

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

.main-nav a {
    display: block;
    padding: 8px 18px;
    font-size: 0.9rem;
    font-weight: 400;
    color: var(--color-text-light);
    border-radius: 20px;
    transition: all var(--transition);
}

.main-nav a:hover,
.main-nav a.active {
    color: var(--color-primary);
    background: rgba(196, 90, 108, 0.08);
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.hamburger,
.hamburger::before,
.hamburger::after {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--color-text);
    transition: all var(--transition);
    content: '';
    position: relative;
}

.hamburger::before { top: -7px; }
.hamburger::after { top: 5px; }

/* =============================================
   HERO
   ============================================= */
.hero {
    position: relative;
    padding: 100px 0 80px;
    text-align: center;
    background: linear-gradient(180deg, var(--color-hero-start) 0%, var(--color-bg) 100%);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 30% 40%, rgba(212, 165, 116, 0.08) 0%, transparent 50%),
                radial-gradient(circle at 70% 60%, rgba(196, 90, 108, 0.06) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--color-primary-dark);
    letter-spacing: 0.08em;
    margin-bottom: 12px;
}

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--color-text-light);
    font-weight: 300;
    letter-spacing: 0.15em;
}

.hero-decoration {
    margin-top: 24px;
    display: flex;
    justify-content: center;
    gap: 12px;
}

.star {
    font-size: 0.8rem;
    color: var(--color-accent);
    animation: twinkle 3s ease-in-out infinite;
}

.star:nth-child(2) { animation-delay: 1s; }
.star:nth-child(3) { animation-delay: 2s; }

@keyframes twinkle {
    0%, 100% { opacity: 0.3; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.3); }
}

/* =============================================
   SECTION TITLE
   ============================================= */
.section-title {
    text-align: center;
    font-size: 1.8rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 40px;
    position: relative;
}

.section-title::after {
    content: '· · ·';
    display: block;
    font-size: 0.7rem;
    letter-spacing: 0.5em;
    color: var(--color-accent);
    margin-top: 8px;
}

/* =============================================
   CATEGORIES
   ============================================= */
.categories-section {
    padding: 60px 0;
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.category-card {
    background: var(--color-card-bg);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: 0 2px 20px var(--color-card-shadow);
    transition: transform var(--transition), box-shadow var(--transition);
}

.category-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(120, 80, 70, 0.12);
}

.category-link {
    display: block;
}

.category-cover {
    height: 160px;
    overflow: hidden;
    background: var(--color-hero-start);
}

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

.category-cover-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
}

.placeholder-icon {
    font-size: 2.5rem;
    color: var(--color-accent);
    opacity: 0.5;
}

.category-info {
    padding: 20px;
}

.category-name {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.category-desc {
    font-size: 0.85rem;
    color: var(--color-text-light);
    line-height: 1.6;
}

/* =============================================
   ARTICLE CARDS (Home & Category)
   ============================================= */
.articles-section {
    padding: 60px 0 80px;
}

.articles-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
    max-width: var(--max-width);
    margin: 0 auto;
}

.poem-card {
    background: var(--color-card-bg);
    border-radius: var(--radius-md);
    box-shadow: 0 2px 20px var(--color-card-shadow);
    transition: transform var(--transition), box-shadow var(--transition);
    border: 1px solid rgba(232, 213, 206, 0.3);
}

.poem-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 28px rgba(120, 80, 70, 0.1);
    border-color: var(--color-accent-light);
}

.poem-link {
    display: block;
    padding: 24px 28px;
}

.poem-title {
    font-size: 1.35rem;
    font-weight: 600;
    color: var(--color-primary-dark);
    margin-bottom: 6px;
}

.poem-subtitle {
    font-size: 0.95rem;
    color: var(--color-accent);
    font-style: italic;
    margin-bottom: 10px;
}

.poem-excerpt {
    font-size: 0.9rem;
    color: var(--color-text-light);
    line-height: 1.7;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.poem-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-top: 14px;
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

.poem-author::before {
    content: '✎ ';
    font-size: 0.75rem;
}

/* =============================================
   PAGINATION
   ============================================= */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    margin-top: 48px;
}

.page-link {
    padding: 10px 24px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 400;
    color: var(--color-text-light);
    border: 1px solid var(--color-border);
    transition: all var(--transition);
}

.page-link:hover {
    color: var(--color-white);
    background: var(--color-primary);
    border-color: var(--color-primary);
}

.page-info {
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

/* =============================================
   CATEGORY HEADER
   ============================================= */
.category-header {
    padding: 60px 0 40px;
    text-align: center;
    background: linear-gradient(180deg, var(--color-hero-start) 0%, transparent 100%);
}

.breadcrumb {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    margin-bottom: 24px;
}

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

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

.breadcrumb .sep {
    margin: 0 8px;
}

.category-title {
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--color-primary-dark);
}

.category-header .category-desc {
    margin-top: 12px;
    font-size: 1rem;
    color: var(--color-text-light);
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

/* =============================================
   ARTICLE DETAIL
   ============================================= */
.article-detail {
    padding: 40px 0 60px;
}

.article-detail .container {
    max-width: var(--max-width);
}

.article-header {
    text-align: center;
    padding: 40px 0 32px;
    position: relative;
}

.article-header::after {
    content: '~ ~ ~';
    display: block;
    font-size: 0.7rem;
    letter-spacing: 0.5em;
    color: var(--color-accent-light);
    margin-top: 32px;
}

.article-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-primary-dark);
    margin-bottom: 10px;
    letter-spacing: 0.04em;
}

.article-subtitle {
    font-size: 1.05rem;
    color: var(--color-accent);
    font-style: italic;
    margin-bottom: 10px;
}

.article-meta {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 20px;
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 4px;
}

.meta-item a {
    color: var(--color-text-muted);
    padding: 2px 10px;
    border-radius: 12px;
    background: rgba(212, 165, 116, 0.1);
}

.meta-item a:hover {
    color: var(--color-primary);
    background: rgba(196, 90, 108, 0.08);
}

/* ----- Poetry Content Display ----- */
.article-body {
    padding: 20px 0;
}

.poem-content-display {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    line-height: 2.2;
    color: var(--color-text);
    text-align: center;
    white-space: pre-line;
    padding: 32px 20px;
    background: var(--color-card-bg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    min-height: 200px;
}

/* =============================================
   ARTICLE NAV (Prev / Next)
   ============================================= */
.article-nav {
    padding: 40px 0 60px;
    border-top: 1px solid var(--color-border);
}

.article-nav .container {
    max-width: var(--max-width);
}

.nav-links {
    display: flex;
    justify-content: space-between;
    gap: 20px;
}

.nav-link {
    flex: 1;
    padding: 20px 24px;
    border-radius: var(--radius-md);
    background: var(--color-card-bg);
    border: 1px solid var(--color-border);
    transition: all var(--transition);
}

.nav-link:hover {
    border-color: var(--color-accent-light);
    box-shadow: 0 4px 16px var(--color-card-shadow);
}

.nav-link.disabled {
    opacity: 0.4;
    cursor: default;
}

.nav-link.next {
    text-align: right;
}

.nav-label {
    display: block;
    font-size: 0.8rem;
    color: var(--color-text-muted);
    margin-bottom: 4px;
}

.nav-title {
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-primary-dark);
    font-family: var(--font-serif);
}

/* =============================================
   FOOTER
   ============================================= */
.site-footer {
    background: var(--color-bg-warm);
    border-top: 1px solid var(--color-border);
    padding: 50px 0 30px;
    margin-top: auto;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    gap: 40px;
    flex-wrap: wrap;
    padding-bottom: 30px;
    border-bottom: 1px solid var(--color-border);
}

.footer-brand {
    max-width: 280px;
}

.footer-icon {
    font-size: 1.8rem;
}

.footer-name {
    font-family: var(--font-serif);
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--color-primary-dark);
    margin-left: 6px;
}

.footer-desc {
    margin-top: 12px;
    font-size: 0.85rem;
    color: var(--color-text-light);
    line-height: 1.8;
}

.footer-links h3 {
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--color-text);
}

.footer-links ul {
    list-style: none;
}

.footer-links li + li {
    margin-top: 8px;
}

.footer-links a {
    font-size: 0.85rem;
    color: var(--color-text-light);
}

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

.footer-bottom {
    text-align: center;
    padding-top: 24px;
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

/* =============================================
   RESPONSIVE
   ============================================= */
@media (max-width: 768px) {
    .hero {
        padding: 60px 0 50px;
    }

    .hero-title {
        font-size: 2.2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .menu-toggle {
        display: block;
    }

    .main-nav {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        background: rgba(250, 247, 245, 0.98);
        backdrop-filter: blur(12px);
        padding: 20px;
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: all var(--transition);
        border-bottom: 1px solid var(--color-border);
    }

    .main-nav.open {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
    }

    .main-nav ul {
        flex-direction: column;
        gap: 4px;
    }

    .main-nav a {
        padding: 12px 16px;
        border-radius: var(--radius-sm);
    }

    .section-title {
        font-size: 1.5rem;
    }

    .categories-grid {
        grid-template-columns: 1fr;
    }

    .poem-link {
        padding: 20px;
    }

    .poem-title {
        font-size: 1.2rem;
    }

    .article-title {
        font-size: 1.6rem;
    }

    .poem-content-display {
        font-size: 1rem;
        padding: 24px 16px;
    }

    .nav-links {
        flex-direction: column;
    }

    .nav-link.next {
        text-align: left;
    }

    .footer-content {
        flex-direction: column;
        gap: 24px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .hero-title {
        font-size: 1.8rem;
    }
}