/* ===== 设计变量 ===== */
:root {
  /* 字体 */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SF Mono", "Fira Code", "Consolas", monospace;

  /* 字号 */
  --text-xs: 0.8rem;
  --text-sm: 0.875rem;
  --text-base: 0.95rem;
  --text-lg: 1.15rem;
  --text-xl: 1.5rem;
  --text-2xl: 2.5rem;

  /* 颜色 */
  --color-primary: #667eea;
  --color-primary-hover: #5a6fd6;
  --color-primary-light: rgba(102, 126, 234, 0.15);
  --color-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --color-bg: #f5f7fa;
  --color-surface: #ffffff;
  --color-border: #e2e8f0;
  --color-border-light: #edf2f7;
  --color-text: #2d3748;
  --color-text-secondary: #4a5568;
  --color-text-muted: #718096;
  --color-text-placeholder: #a0aec0;
  --color-text-inverse: #ffffff;
  --color-danger: #e53e3e;
  --color-danger-bg: #fed7d7;
  --color-danger-bg-hover: #fcbbbb;
  --color-danger-text: #c53030;
  --color-success-bg: #c6f6d5;
  --color-success-text: #276749;
  --color-bg-subtle: var(--color-bg-subtle);
  --color-bg-card-icon: var(--color-bg-card-icon);

  /* 圆角 */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;

  /* 阴影 */
  --shadow-sm: 0 2px 12px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 12px 40px rgba(102, 126, 234, 0.15);
  --shadow-modal: 0 20px 60px rgba(0, 0, 0, 0.2);

  /* 间距 */
  --content-max-width: 1200px;
  --admin-max-width: 1000px;
}

/* ===== 全局 ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: var(--font-sans);
    background: var(--color-bg);
    color: var(--color-text);
    min-height: 100vh;
}

/* ===== 主页 ===== */
.clock {
    position: fixed;
    top: 1rem;
    left: 1.5rem;
    font-family: var(--font-mono);
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--color-text-muted);
    background: var(--color-surface);
    padding: 0.4rem 0.9rem;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-sm);
    z-index: 50;
    letter-spacing: 0.05em;
    user-select: none;
}

.page-wrapper {
    max-width: var(--content-max-width);
    margin: 0 auto;
    padding: 2rem;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.main-header {
    text-align: center;
    padding: 3rem 1rem 2rem;
}

.main-title {
    font-size: var(--text-2xl);
    font-weight: 700;
    background: var(--color-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.subtitle {
    color: var(--color-text-placeholder);
    font-size: 1rem;
}

.content { flex: 1; }

.sites-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 1.5rem;
    padding: 1rem 0;
}

.site-card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: 1.8rem 1.5rem;
    text-align: center;
    box-shadow: var(--shadow-md);
    cursor: pointer;
    transition: all 0.3s ease;
    border: 1px solid var(--color-border);
    user-select: none;
}

.site-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary);
}

.card-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 1rem;
    border-radius: 50%;
    background: var(--color-bg-card-icon);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    font-size: 2rem;
}

.card-icon img {
    width: 32px;
    height: 32px;
    object-fit: contain;
}
.card-emoji {
    line-height: 1;
}
}

.card-title {
    font-size: var(--text-lg);
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 0.5rem;
}

.card-desc {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.empty, .error {
    text-align: center;
    color: var(--color-text-placeholder);
    padding: 3rem;
    grid-column: 1 / -1;
}

.error { color: var(--color-danger); }

.main-footer {
    text-align: center;
    padding: 2rem 0;
}

.footer-text {
    color: var(--color-text-placeholder);
    font-size: 0.9rem;
}

/* ===== 后台管理 ===== */
.admin-wrapper {
    max-width: var(--admin-max-width);
    margin: 0 auto;
    padding: 2rem;
}

.admin-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--color-border);
}

.admin-header h1 {
    font-size: var(--text-xl);
    color: var(--color-text);
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.6rem 1.2rem;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
}

.btn-primary {
    background: var(--color-primary);
    color: var(--color-text-inverse);
}
.btn-primary:hover { background: var(--color-primary-hover); }

.btn-secondary {
    background: var(--color-border-light);
    color: var(--color-text-secondary);
}
.btn-secondary:hover { background: var(--color-border); }

.btn-danger {
    background: var(--color-danger-bg);
    color: var(--color-danger-text);
}
.btn-danger:hover { background: var(--color-danger-bg-hover); }

.btn-sm {
    padding: 0.4rem 0.8rem;
    font-size: var(--text-xs);
}

.toolbar {
    display: flex;
    gap: 0.8rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.data-table {
    width: 100%;
    background: var(--color-surface);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border-collapse: collapse;
}

.data-table th,
.data-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--color-border-light);
}

.data-table th {
    background: var(--color-bg-subtle);
    font-weight: 600;
    color: var(--color-text-secondary);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.data-table td {
    color: var(--color-text);
    font-size: 0.9rem;
}

.data-table tr:hover td {
    background: var(--color-bg-subtle);
}

.site-icon-preview {
    width: 32px;
    height: 32px;
    border-radius: 6px;
    object-fit: contain;
    background: var(--color-bg-card-icon);
    padding: 2px;
}

.actions {
    display: flex;
    gap: 0.5rem;
}

/* ===== 模态框 ===== */
.modal-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s;
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: all;
}

.modal {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: 2rem;
    width: 90%;
    max-width: 480px;
    box-shadow: var(--shadow-modal);
    transform: translateY(20px);
    transition: transform 0.3s;
}

.modal-overlay.active .modal {
    transform: translateY(0);
}

.modal h2 {
    margin-bottom: 1.5rem;
    font-size: 1.3rem;
    color: var(--color-text);
}

.form-group {
    margin-bottom: 1.2rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.4rem;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-text-secondary);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.7rem 1rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: var(--text-base);
    font-family: inherit;
    transition: border-color 0.2s;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
}

.form-group textarea {
    resize: vertical;
    min-height: 80px;
}

.form-hint {
    font-size: var(--text-xs);
    color: var(--color-text-placeholder);
    margin-top: 0.3rem;
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 0.8rem;
    margin-top: 1.5rem;
}

.hidden { display: none !important; }

/* ===== 响应式 ===== */
@media (max-width: 600px) {
    .main-title { font-size: 1.8rem; }
    .clock {
        top: 0.5rem;
        left: 0.5rem;
        font-size: 0.85rem;
        padding: 0.3rem 0.6rem;
    }
    .sites-grid { grid-template-columns: 1fr; }
    .admin-header { flex-direction: column; gap: 1rem; align-items: flex-start; }
    .data-table { font-size: 0.85rem; }
    .data-table th, .data-table td { padding: 0.75rem 0.5rem; }
    .settings-panel { grid-template-columns: 1fr; }
}