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

:root {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-card: #1c2128;
    --bg-card-hover: #222830;
    --border: #30363d;
    --border-hover: #484f58;
    --text-primary: #e6edf3;
    --text-secondary: #8b949e;
    --text-tertiary: #6e7681;
    --accent-blue: #58a6ff;
    --accent-green: #3fb950;
    --accent-orange: #d29922;
    --accent-purple: #a371f7;
    --accent-red: #f85149;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans", Helvetica, Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

a { color: var(--accent-blue); text-decoration: none; transition: color 0.2s; }
a:hover { text-decoration: underline; }

/* ========== Container ========== */
.container {
    max-width: 1300px;
    margin: 0 auto;
    padding: 32px 24px 60px;
}

/* ========== Header ========== */
.header {
    text-align: center;
    padding: 36px 20px 28px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 28px;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 14px;
    flex-wrap: wrap;
}

.github-icon { color: var(--text-primary); }

.header h1 {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.subtitle {
    color: var(--text-secondary);
    margin-top: 10px;
    font-size: 0.95rem;
}

.controls {
    margin-top: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

/* ========== Buttons ========== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 9px 20px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    background: var(--bg-secondary);
    color: var(--text-primary);
}
.btn:hover { background: var(--bg-card-hover); border-color: var(--border-hover); }
.btn:active { transform: scale(0.97); }

.btn-refresh { background: #238636; border-color: #238636; color: #fff; }
.btn-refresh:hover { background: #2ea043; border-color: #2ea043; }
.btn-retry { background: var(--accent-red); border-color: var(--accent-red); color: #fff; }

.last-update { color: var(--text-tertiary); font-size: 0.85rem; }

/* ========== Loading ========== */
.loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 80px 20px;
    color: var(--text-secondary);
}

.spinner {
    width: 44px; height: 44px;
    border: 3px solid var(--border);
    border-top-color: var(--accent-blue);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin-bottom: 16px;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ========== Error ========== */
.error-box {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 60px 20px;
    color: var(--text-secondary);
    text-align: center;
}
.error-box h3 { margin-top: 16px; color: var(--accent-red); }
.error-box p { margin: 8px 0 20px; max-width: 500px; }

.empty-state {
    grid-column: 1 / -1;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 60px 20px;
    color: var(--text-secondary);
    text-align: center;
}
.empty-state h3 { margin-top: 16px; }
.empty-state p { margin-top: 8px; }

/* ========== Stats Bar ========== */
.stats-bar {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-bottom: 24px;
}

.stat-item {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 16px 12px;
    text-align: center;
    transition: border-color 0.2s;
}
.stat-item:hover { border-color: var(--border-hover); }

.stat-value {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-blue);
    line-height: 1.3;
}

.stat-label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 2px;
}

/* ========== Pagination ========== */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 6px;
    padding: 8px 0;
}

.pagination-top { margin-bottom: 20px; }
.pagination-bottom { margin-top: 24px; }

.page-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    height: 36px;
    padding: 0 10px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.15s;
}
.page-btn:hover:not(:disabled):not(.active) {
    border-color: var(--accent-blue);
    color: var(--accent-blue);
}
.page-btn.active {
    background: #1f6feb;
    border-color: #1f6feb;
    color: #fff;
    font-weight: 600;
}
.page-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.page-ellipsis {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px; height: 36px;
    color: var(--text-tertiary);
    font-size: 0.9rem;
}

.page-info {
    margin-left: 12px;
    color: var(--text-tertiary);
    font-size: 0.8rem;
    white-space: nowrap;
}

/* ========== Repo Grid ========== */
.repo-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

/* ========== Repo Card ========== */
.repo-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 18px;
    transition: all 0.2s;
    position: relative;
    display: flex;
    flex-direction: column;
}
.repo-card:hover {
    border-color: var(--border-hover);
    background: var(--bg-card-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.3);
}

/* 排名角标 */
.card-rank {
    position: absolute;
    top: 12px;
    right: 14px;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-tertiary);
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 2px 8px;
}

.repo-card.rank-1 .card-rank { border-color: #d29922; color: #d29922; background: rgba(210,153,34,0.1); }
.repo-card.rank-2 .card-rank { border-color: #8b949e; color: #c0c0c0; background: rgba(192,192,192,0.1); }
.repo-card.rank-3 .card-rank { border-color: #b0724a; color: #b0724a; background: rgba(176,114,74,0.1); }

/* 卡片头部 */
.card-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
    padding-right: 50px;
}

.avatar {
    width: 24px; height: 24px;
    border-radius: 50%;
    flex-shrink: 0;
    border: 1px solid var(--border);
}

.card-title {
    min-width: 0;
    flex: 1;
}

.repo-name {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--accent-blue);
    word-break: break-all;
    line-height: 1.3;
}
.repo-name:hover { text-decoration: underline; }

/* 描述 */
.card-desc {
    color: var(--text-secondary);
    font-size: 0.82rem;
    line-height: 1.5;
    margin-bottom: 10px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* README 简介 */
.card-readme {
    margin-bottom: 12px;
    padding: 10px 12px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    flex: 1;
    min-height: 0;
}

.readme-label {
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--accent-purple);
    margin-bottom: 4px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.readme-text {
    font-size: 0.76rem;
    color: var(--text-secondary);
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 5;
    -webkit-box-orient: vertical;
    overflow: hidden;
    word-break: break-all;
}

/* 元数据 */
.card-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 10px;
}

.meta-item {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 0.8rem;
    color: var(--text-secondary);
}
.meta-item svg { opacity: 0.7; flex-shrink: 0; }

.star-item { color: var(--accent-orange); font-weight: 600; }

.lang-dot {
    width: 10px; height: 10px;
    border-radius: 50%;
    display: inline-block;
    flex-shrink: 0;
}

/* 标签 */
.card-topics {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
    margin-bottom: 12px;
}

.topic-tag {
    display: inline-block;
    padding: 2px 9px;
    font-size: 0.7rem;
    font-weight: 500;
    border-radius: 12px;
    background: rgba(88,166,255,0.08);
    color: var(--accent-blue);
    border: 1px solid rgba(88,166,255,0.15);
    transition: all 0.15s;
}
.topic-tag:hover { background: rgba(88,166,255,0.18); border-color: rgba(88,166,255,0.3); }

/* 卡片底部 */
.card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 8px;
    padding-top: 10px;
    border-top: 1px solid var(--border);
    margin-top: auto;
}

.card-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    border-radius: 5px;
    font-size: 0.78rem;
    font-weight: 500;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    color: var(--text-primary);
    transition: all 0.15s;
    text-decoration: none;
}
.card-link:hover { border-color: var(--accent-blue); color: var(--accent-blue); text-decoration: none; }

/* ========== Footer ========== */
.footer {
    text-align: center;
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid var(--border);
    color: var(--text-tertiary);
    font-size: 0.8rem;
    line-height: 1.8;
}

/* ========== Responsive ========== */
@media (max-width: 1100px) {
    .repo-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .container { padding: 16px 12px 40px; }
    .header h1 { font-size: 1.4rem; }
    .stats-bar { grid-template-columns: repeat(2, 1fr); gap: 10px; }
    .repo-grid { grid-template-columns: 1fr; gap: 12px; }
    .repo-card { padding: 14px; }
    .card-header { padding-right: 40px; }
    .page-info { display: none; }
}

@media (max-width: 480px) {
    .stats-bar { grid-template-columns: 1fr 1fr; }
}