/* ========================================
   IndexTTS API 平台 - 主样式表
   ======================================== */

:root {
    --primary: #4f46e5;
    --primary-dark: #4338ca;
    --primary-light: #eef2ff;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    --radius: 8px;
    --shadow: 0 1px 3px rgba(0,0,0,.1), 0 1px 2px rgba(0,0,0,.06);
    --shadow-lg: 0 4px 6px rgba(0,0,0,.07), 0 10px 15px rgba(0,0,0,.1);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: var(--gray-50);
    color: var(--gray-800);
    line-height: 1.6;
    min-height: 100vh;
}

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

/* ========== Header ========== */
.header {
    background: #fff;
    border-bottom: 1px solid var(--gray-200);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow);
}
.header-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 64px;
}
.logo {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--gray-900);
    display: flex;
    align-items: center;
    gap: 8px;
}
.logo .icon { font-size: 1.6rem; }
.nav { display: flex; gap: 8px; align-items: center; }
.nav a {
    padding: 8px 16px;
    border-radius: var(--radius);
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.2s;
}
.nav a:hover { background: var(--gray-100); }
.nav .btn-primary { background: var(--primary); color: #fff; }
.nav .btn-primary:hover { background: var(--primary-dark); }
.nav .btn-outline { border: 1px solid var(--gray-300); color: var(--gray-700); }
.nav .btn-outline:hover { border-color: var(--primary); color: var(--primary); }
.user-menu { display: flex; align-items: center; gap: 12px; }
.badge { background: var(--primary-light); color: var(--primary); padding: 2px 10px; border-radius: 20px; font-size: 0.75rem; font-weight: 600; }

/* ========== Container ========== */
.container { max-width: 1200px; margin: 0 auto; padding: 32px 20px; }

/* ========== Hero (首页) ========== */
.hero {
    text-align: center;
    padding: 80px 20px 60px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
}
.hero h1 { font-size: 2.8rem; margin-bottom: 16px; }
.hero p { font-size: 1.2rem; opacity: 0.9; max-width: 600px; margin: 0 auto 32px; }
.hero-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.hero-btns a {
    padding: 14px 32px;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    transition: all 0.2s;
}
.btn-white { background: #fff; color: var(--primary); }
.btn-white:hover { background: var(--gray-100); color: var(--primary-dark); }
.btn-ghost { background: transparent; color: #fff; border: 2px solid rgba(255,255,255,.5); }
.btn-ghost:hover { background: rgba(255,255,255,.15); border-color: #fff; }

/* ========== Feature Cards ========== */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    margin-top: -40px;
    padding: 0 20px;
}
.feature-card {
    background: #fff;
    padding: 32px 24px;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    text-align: center;
    transition: transform 0.2s;
}
.feature-card:hover { transform: translateY(-4px); }
.feature-card .icon { font-size: 2.5rem; margin-bottom: 12px; }
.feature-card h3 { font-size: 1.2rem; margin-bottom: 8px; color: var(--gray-900); }
.feature-card p { font-size: 0.9rem; color: var(--gray-500); }

/* ========== Pricing ========== */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    margin-top: 32px;
}
.pricing-card {
    background: #fff;
    border: 2px solid var(--gray-200);
    border-radius: 12px;
    padding: 36px 28px;
    text-align: center;
    transition: all 0.2s;
}
.pricing-card:hover { border-color: var(--primary); box-shadow: var(--shadow-lg); }
.pricing-card.popular { border-color: var(--primary); box-shadow: var(--shadow-lg); position: relative; }
.pricing-card.popular::before {
    content: "推荐";
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary);
    color: #fff;
    padding: 4px 20px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}
.pricing-card h3 { font-size: 1.3rem; margin-bottom: 8px; }
.pricing-card .price { font-size: 2.5rem; font-weight: 700; color: var(--primary); margin: 16px 0; }
.pricing-card .price span { font-size: 1rem; color: var(--gray-500); font-weight: 400; }
.pricing-card ul { list-style: none; margin: 20px 0; padding: 0; }
.pricing-card ul li { padding: 8px 0; color: var(--gray-600); border-bottom: 1px solid var(--gray-100); }
.pricing-card ul li:last-child { border-bottom: none; }

/* ========== Cards / Panels ========== */
.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: var(--shadow);
    padding: 24px;
    margin-bottom: 24px;
}
.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--gray-100);
}
.card-header h2 { font-size: 1.2rem; color: var(--gray-900); }

/* ========== Tables ========== */
table {
    width: 100%;
    border-collapse: collapse;
}
table th, table td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--gray-200);
}
table th {
    background: var(--gray-50);
    font-weight: 600;
    color: var(--gray-600);
    font-size: 0.85rem;
    text-transform: uppercase;
}
table tr:hover { background: var(--gray-50); }

/* ========== Forms ========== */
.form-group { margin-bottom: 20px; }
.form-group label {
    display: block;
    margin-bottom: 6px;
    font-weight: 600;
    color: var(--gray-700);
    font-size: 0.9rem;
}
.form-control {
    width: 100%;
    padding: 10px 16px;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius);
    font-size: 0.95rem;
    transition: all 0.2s;
}
.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}
textarea.form-control { resize: vertical; min-height: 100px; }
select.form-control { background: #fff; }

/* ========== Buttons ========== */
.btn {
    display: inline-block;
    padding: 10px 24px;
    border: none;
    border-radius: var(--radius);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    text-align: center;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { background: #059669; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #dc2626; }
.btn-warning { background: var(--warning); color: #fff; }
.btn-warning:hover { background: #d97706; }
.btn-sm { padding: 6px 14px; font-size: 0.85rem; }
.btn-block { display: block; width: 100%; }

/* ========== Stats Grid ========== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}
.stat-card {
    background: #fff;
    border-radius: 12px;
    padding: 24px;
    box-shadow: var(--shadow);
    text-align: center;
}
.stat-card .stat-value { font-size: 2rem; font-weight: 700; color: var(--primary); }
.stat-card .stat-label { font-size: 0.85rem; color: var(--gray-500); margin-top: 4px; }

/* ========== Alert ========== */
.alert {
    padding: 12px 20px;
    border-radius: var(--radius);
    margin-bottom: 20px;
    font-size: 0.9rem;
}
.alert-success { background: #d1fae5; color: #065f46; border: 1px solid #a7f3d0; }
.alert-danger { background: #fee2e2; color: #991b1b; border: 1px solid #fecaca; }
.alert-warning { background: #fef3c7; color: #92400e; border: 1px solid #fde68a; }
.alert-info { background: #dbeafe; color: #1e40af; border: 1px solid #bfdbfe; }

/* ========== API Doc ========== */
.api-section { margin-bottom: 32px; }
.api-section h3 { font-size: 1.1rem; margin-bottom: 12px; padding-bottom: 8px; border-bottom: 2px solid var(--primary-light); }
.api-endpoint {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
    flex-wrap: wrap;
}
.api-method {
    padding: 4px 12px;
    border-radius: 4px;
    font-weight: 700;
    font-size: 0.8rem;
    text-transform: uppercase;
    color: #fff;
    min-width: 60px;
    text-align: center;
}
.api-method.post { background: var(--success); }
.api-method.get { background: var(--primary); }
.api-url { font-family: "Fira Code", "Courier New", monospace; background: var(--gray-800); color: #e2e8f0; padding: 6px 14px; border-radius: 6px; font-size: 0.9rem; }
pre {
    background: var(--gray-800);
    color: #e2e8f0;
    padding: 20px;
    border-radius: 8px;
    overflow-x: auto;
    font-size: 0.85rem;
    line-height: 1.7;
    margin: 12px 0;
}
code {
    font-family: "Fira Code", "Courier New", monospace;
    background: var(--gray-100);
    color: var(--danger);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.85em;
}
pre code { background: none; color: inherit; padding: 0; }

/* ========== Footer ========== */
.footer {
    background: var(--gray-800);
    color: var(--gray-400);
    text-align: center;
    padding: 32px 20px;
    margin-top: auto;
}
.footer a { color: var(--gray-300); }

/* ========== Modal ========== */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}
.modal-overlay.active { display: flex; }
.modal {
    background: #fff;
    border-radius: 12px;
    padding: 32px;
    max-width: 500px;
    width: 90%;
    box-shadow: var(--shadow-lg);
}
.modal h3 { margin-bottom: 20px; }

/* ========== Dashboard Layout ========== */
.dashboard-layout {
    display: flex;
    min-height: calc(100vh - 64px);
}
.sidebar {
    width: 240px;
    background: #fff;
    border-right: 1px solid var(--gray-200);
    padding: 24px 0;
    flex-shrink: 0;
}
.sidebar-nav { list-style: none; padding: 0; }
.sidebar-nav li a {
    display: block;
    padding: 12px 24px;
    color: var(--gray-600);
    font-weight: 500;
    border-left: 3px solid transparent;
    transition: all 0.2s;
}
.sidebar-nav li a:hover { background: var(--gray-50); color: var(--gray-900); }
.sidebar-nav li a.active {
    background: var(--primary-light);
    color: var(--primary);
    border-left-color: var(--primary);
}
.main-content { flex: 1; padding: 32px; overflow-x: auto; }

/* ========== API Key Display ========== */
.api-key-display {
    background: var(--gray-100);
    border: 1px solid var(--gray-300);
    padding: 14px 18px;
    border-radius: var(--radius);
    font-family: "Fira Code", "Courier New", monospace;
    font-size: 0.9rem;
    word-break: break-all;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
}
.copy-btn {
    background: var(--primary);
    color: #fff;
    border: none;
    padding: 6px 16px;
    border-radius: var(--radius);
    cursor: pointer;
    font-size: 0.85rem;
    white-space: nowrap;
}

/* ========== Responsive ========== */
@media (max-width: 768px) {
    .hero h1 { font-size: 1.8rem; }
    .dashboard-layout { flex-direction: column; }
    .sidebar { width: 100%; border-right: none; border-bottom: 1px solid var(--gray-200); }
    .sidebar-nav { display: flex; overflow-x: auto; }
    .sidebar-nav li a { white-space: nowrap; border-left: none; border-bottom: 3px solid transparent; }
    .sidebar-nav li a.active { border-left: none; border-bottom-color: var(--primary); }
    .main-content { padding: 20px; }
    .header-inner { flex-wrap: wrap; height: auto; padding: 12px 20px; gap: 8px; }
    .nav { flex-wrap: wrap; }
}

/* ========== Utility Classes ========== */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--gray-500); }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.text-primary { color: var(--primary); }
.mt-20 { margin-top: 20px; }
.mb-20 { margin-bottom: 20px; }
.flex { display: flex; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.gap-10 { gap: 10px; }
.gap-20 { gap: 20px; }