/* ==================== 基础变量 ==================== */
:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-card: #1a1a25;
    --bg-input: #222233;
    --border: #2a2a3a;
    --text-primary: #e8e8f0;
    --text-secondary: #8888aa;
    --text-muted: #555570;
    --accent: #4f8fff;
    --accent-hover: #6ba0ff;
    --success: #22c55e;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #3b82f6;
    --radius: 12px;
    --shadow: 0 4px 24px rgba(0,0,0,0.3);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); }

/* ==================== Container ==================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* ==================== Flash Messages ==================== */
.flash-messages {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.flash {
    padding: 12px 20px;
    border-radius: 8px;
    font-size: 14px;
    animation: slideIn 0.3s ease;
    transition: opacity 0.3s;
}

.flash-success { background: var(--success); color: #fff; }
.flash-error { background: var(--danger); color: #fff; }
.flash-warning { background: var(--warning); color: #000; }
.flash-info { background: var(--info); color: #fff; }

@keyframes slideIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

/* ==================== Auth Box ==================== */
.auth-box {
    max-width: 400px;
    margin: 60px auto;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 40px;
    box-shadow: var(--shadow);
}

.auth-box .logo {
    font-size: 48px;
    text-align: center;
    margin-bottom: 10px;
}

.auth-box h1 {
    text-align: center;
    font-size: 24px;
    margin-bottom: 30px;
    color: var(--text-primary);
}

.auth-link {
    text-align: center;
    margin-top: 20px;
    color: var(--text-secondary);
    font-size: 14px;
}

.gift-tip {
    text-align: center;
    margin-top: 15px;
    color: var(--warning);
    font-size: 14px;
}

/* ==================== Forms ==================== */
.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-size: 14px;
    color: var(--text-secondary);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 15px;
    transition: border-color 0.2s;
}

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

/* ==================== Buttons ==================== */
.btn {
    display: inline-block;
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    text-align: center;
}

.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-success { background: var(--success); color: #fff; }
.btn-warning { background: var(--warning); color: #000; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-outline { background: transparent; border: 1px solid var(--border); color: var(--text-secondary); }
.btn-outline:hover { border-color: var(--accent); color: var(--accent); }
.btn-block { display: block; width: 100%; }
.btn-lg { padding: 14px 28px; font-size: 16px; }
.btn-sm { padding: 6px 12px; font-size: 12px; }

/* ==================== Dashboard ==================== */
.dashboard {
    max-width: 800px;
    margin: 0 auto;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.header h1 { font-size: 24px; }

.user-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.nickname {
    color: var(--text-secondary);
}

/* Status Card */
.status-card {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 24px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: 24px;
}

.status-card.active { border-color: var(--success); }
.status-card.expired { border-color: var(--danger); }

.status-icon { font-size: 48px; }

.status-info h2 {
    font-size: 20px;
    margin-bottom: 4px;
}

.status-info p {
    color: var(--text-secondary);
    font-size: 14px;
}

/* Action Grid */
.action-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-bottom: 24px;
}

.action-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
}

.action-card h3 {
    margin-bottom: 12px;
    font-size: 16px;
}

.action-card .price {
    font-size: 24px;
    font-weight: bold;
    color: var(--accent);
    margin-bottom: 16px;
}

/* Subscribe Card */
.subscribe-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
}

.subscribe-card h3 { margin-bottom: 12px; }

.link-box {
    display: flex;
    gap: 10px;
    align-items: center;
    background: var(--bg-input);
    border-radius: 8px;
    padding: 12px;
    margin-bottom: 8px;
    overflow-x: auto;
}

.link-box code {
    flex: 1;
    font-size: 12px;
    color: var(--text-secondary);
    word-break: break-all;
}

.tip {
    font-size: 12px;
    color: var(--text-muted);
}

/* ==================== Pay Box ==================== */
.pay-box {
    max-width: 400px;
    margin: 60px auto;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 40px;
    box-shadow: var(--shadow);
    text-align: center;
}

.pay-box .logo { font-size: 48px; margin-bottom: 10px; }
.pay-box h1 { font-size: 24px; margin-bottom: 24px; }

.order-info {
    background: var(--bg-input);
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 24px;
}

.info-row {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    border-bottom: 1px solid var(--border);
}

.info-row:last-child { border-bottom: none; }

.price-big {
    font-size: 24px;
    font-weight: bold;
    color: var(--accent);
}

.success-msg {
    padding: 20px;
    background: var(--success);
    color: #fff;
    border-radius: 8px;
    font-size: 18px;
    margin-bottom: 16px;
}

/* ==================== Admin Layout ==================== */
.admin-layout {
    display: flex;
    min-height: calc(100vh - 40px);
    gap: 24px;
}

.sidebar {
    width: 220px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    flex-shrink: 0;
}

.sidebar-header h2 { font-size: 18px; margin-bottom: 20px; }

.sidebar nav { display: flex; flex-direction: column; gap: 4px; }

.sidebar nav a {
    display: block;
    padding: 10px 14px;
    border-radius: 8px;
    color: var(--text-secondary);
    font-size: 14px;
    transition: all 0.2s;
}

.sidebar nav a:hover { background: var(--bg-input); color: var(--text-primary); }
.sidebar nav a.active { background: var(--accent); color: #fff; }

.sidebar-footer {
    margin-top: auto;
    padding-top: 20px;
    border-top: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.sidebar-footer a {
    font-size: 13px;
    color: var(--text-muted);
}

.main-content { flex: 1; min-width: 0; }

/* ==================== Stats Grid ==================== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    text-align: center;
}

.stat-icon { font-size: 32px; margin-bottom: 8px; }
.stat-value { font-size: 28px; font-weight: bold; color: var(--accent); }
.stat-label { font-size: 13px; color: var(--text-secondary); margin-top: 4px; }

/* ==================== Cards ==================== */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    margin-bottom: 20px;
}

.card h3 {
    margin-bottom: 16px;
    font-size: 16px;
}

/* ==================== Tables ==================== */
.table-container {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border);
    font-size: 14px;
}

th {
    background: var(--bg-secondary);
    color: var(--text-secondary);
    font-weight: 500;
}

tr:hover { background: var(--bg-secondary); }

.actions {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

/* ==================== Badges ==================== */
.badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
}

.badge-success { background: rgba(34,197,94,0.15); color: var(--success); }
.badge-warning { background: rgba(245,158,11,0.15); color: var(--warning); }
.badge-danger { background: rgba(239,68,68,0.15); color: var(--danger); }
.badge-info { background: rgba(59,130,246,0.15); color: var(--info); }

/* ==================== Form Inline ==================== */
.form-inline {
    display: flex;
    gap: 12px;
    align-items: flex-end;
    flex-wrap: wrap;
}

.form-inline .form-group {
    margin-bottom: 0;
}

.form-inline .form-group input,
.form-inline .form-group select {
    width: auto;
    min-width: 100px;
}

/* ==================== Responsive ==================== */
@media (max-width: 768px) {
    .admin-layout { flex-direction: column; }
    .sidebar { width: 100%; }
    .sidebar nav { flex-direction: row; flex-wrap: wrap; }
    .sidebar nav a { flex: 1; min-width: 100px; text-align: center; }
    .form-inline { flex-direction: column; }
    .form-inline .form-group input { width: 100%; }
    .header { flex-direction: column; gap: 12px; }
    .actions { flex-direction: column; }
}