:root {
    --bg-main: #0b0f19;
    --bg-card: rgba(17, 24, 39, 0.85);
    --bg-card-hover: rgba(31, 41, 55, 0.95);
    --border-color: rgba(255, 255, 255, 0.08);
    --border-glow: rgba(56, 189, 248, 0.3);
    
    --primary: #38bdf8;
    --primary-glow: rgba(56, 189, 248, 0.4);
    --accent: #818cf8;
    --success: #34d399;
    --warning: #fbbf24;
    --danger: #f87171;
    
    --text-main: #f3f4f6;
    --text-muted: #9ca3af;
    --text-dim: #6b7280;
    
    --font-heading: 'Outfit', sans-serif;
    --font-sans: 'Plus Jakarta Sans', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
}

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

body {
    background-color: var(--bg-main);
    background-image: 
        radial-gradient(circle at 15% 15%, rgba(56, 189, 248, 0.06) 0%, transparent 40%),
        radial-gradient(circle at 85% 85%, rgba(129, 140, 248, 0.06) 0%, transparent 40%);
    color: var(--text-main);
    font-family: var(--font-sans);
    line-height: 1.5;
    min-height: 100vh;
}

/* App Container */
.app-container {
    max-width: 1380px;
    margin: 0 auto;
    padding: 0 24px 60px 24px;
}

/* Navbar */
.navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 0;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 32px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 14px;
}

.brand-icon {
    width: 44px;
    height: 44px;
    background: rgba(56, 189, 248, 0.1);
    border: 1px solid rgba(56, 189, 248, 0.3);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 20px rgba(56, 189, 248, 0.15);
}

.brand-title {
    font-family: var(--font-heading);
    font-size: 20px;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.brand-title .highlight {
    background: linear-gradient(135deg, #38bdf8, #818cf8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.brand-subtitle {
    display: block;
    font-size: 12px;
    color: var(--text-muted);
}

/* Navigation Tabs */
.nav-links {
    display: flex;
    background: rgba(17, 24, 39, 0.6);
    border: 1px solid var(--border-color);
    padding: 4px;
    border-radius: var(--radius-md);
    gap: 4px;
}

.nav-tab {
    display: flex;
    align-items: center;
    gap: 8px;
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-family: var(--font-sans);
    font-size: 14px;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s ease;
}

.nav-tab:hover {
    color: var(--text-main);
    background: rgba(255, 255, 255, 0.04);
}

.nav-tab.active {
    color: #fff;
    background: linear-gradient(135deg, rgba(56, 189, 248, 0.2), rgba(129, 140, 248, 0.2));
    border: 1px solid rgba(56, 189, 248, 0.4);
    box-shadow: 0 0 12px rgba(56, 189, 248, 0.2);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(52, 211, 153, 0.1);
    border: 1px solid rgba(52, 211, 153, 0.3);
    padding: 6px 12px;
    border-radius: 9999px;
    font-size: 13px;
    color: var(--success);
    font-weight: 500;
}

.pulse-dot {
    width: 8px;
    height: 8px;
    background-color: var(--success);
    border-radius: 50%;
    box-shadow: 0 0 8px var(--success);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { transform: scale(0.95); opacity: 0.8; }
    50% { transform: scale(1.2); opacity: 1; }
    100% { transform: scale(0.95); opacity: 0.8; }
}

/* Tab panes */
.tab-pane {
    display: none;
    animation: fadeIn 0.3s ease;
}

.tab-pane.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(6px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Hero Banner */
.hero-banner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: linear-gradient(135deg, rgba(30, 41, 59, 0.7), rgba(15, 23, 42, 0.9));
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 32px 40px;
    margin-bottom: 28px;
    backdrop-filter: blur(12px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.hero-text h2 {
    font-family: var(--font-heading);
    font-size: 26px;
    font-weight: 700;
    margin-bottom: 8px;
    background: linear-gradient(to right, #ffffff, #94a3b8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-text p {
    color: var(--text-muted);
    font-size: 15px;
    max-width: 580px;
}

.hero-endpoint-box {
    background: rgba(11, 15, 25, 0.8);
    border: 1px solid var(--border-color);
    padding: 12px 18px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    gap: 12px;
}

.endpoint-label {
    font-size: 11px;
    text-transform: uppercase;
    color: var(--text-dim);
    font-weight: 600;
    letter-spacing: 0.5px;
}

.endpoint-code {
    font-family: var(--font-mono);
    color: var(--primary);
    font-size: 14px;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-bottom: 28px;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 22px;
    backdrop-filter: blur(10px);
    transition: transform 0.2s, border-color 0.2s;
}

.stat-card:hover {
    transform: translateY(-2px);
    border-color: var(--border-glow);
}

.stat-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
}

.stat-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-icon {
    font-size: 18px;
}

.stat-value {
    font-family: var(--font-heading);
    font-size: 32px;
    font-weight: 700;
    color: #fff;
    line-height: 1;
    margin-bottom: 8px;
}

.stat-meta {
    font-size: 12px;
    color: var(--text-dim);
}

/* Two Column Grid */
.two-col-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.content-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    backdrop-filter: blur(10px);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 24px;
    border-bottom: 1px solid var(--border-color);
}

.card-header h3 {
    font-family: var(--font-heading);
    font-size: 18px;
    font-weight: 600;
}

.card-body {
    padding: 24px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-family: var(--font-sans);
    font-size: 14px;
    font-weight: 600;
    padding: 9px 18px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, #38bdf8, #6366f1);
    color: #fff;
    box-shadow: 0 4px 14px rgba(56, 189, 248, 0.3);
}

.btn-primary:hover {
    box-shadow: 0 6px 20px rgba(56, 189, 248, 0.45);
    transform: translateY(-1px);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-main);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
}

.btn-sm {
    padding: 6px 12px;
    font-size: 12px;
}

.btn-copy {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    font-size: 12px;
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background 0.2s;
}

.btn-copy:hover {
    background: rgba(255, 255, 255, 0.16);
}

.btn-block {
    width: 100%;
}

/* Badges */
.badge {
    padding: 4px 10px;
    border-radius: 9999px;
    font-size: 12px;
    font-weight: 600;
}

.badge-success {
    background: rgba(52, 211, 153, 0.15);
    color: var(--success);
    border: 1px solid rgba(52, 211, 153, 0.3);
}

.badge-warning {
    background: rgba(251, 191, 36, 0.15);
    color: var(--warning);
    border: 1px solid rgba(251, 191, 36, 0.3);
}

/* Models Grid */
.models-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 20px;
    margin-top: 24px;
}

.model-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 24px;
    transition: all 0.2s;
}

.model-card:hover {
    border-color: var(--primary-glow);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.model-slug {
    font-family: var(--font-mono);
    color: var(--primary);
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 6px;
}

.model-display {
    color: var(--text-main);
    font-size: 14px;
    margin-bottom: 16px;
}

.model-meta-row {
    display: flex;
    justify-content: space-between;
    font-size: 13px;
    color: var(--text-muted);
    padding: 6px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.04);
}

.model-meta-row strong {
    color: var(--text-main);
    font-family: var(--font-mono);
}

/* Quota Item */
.quota-item {
    padding: 14px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.quota-item:last-child {
    border-bottom: none;
}

.quota-info {
    display: flex;
    justify-content: space-between;
    margin-bottom: 8px;
    font-size: 14px;
}

.quota-bar-bg {
    width: 100%;
    height: 8px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 999px;
    overflow: hidden;
}

.quota-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    border-radius: 999px;
    transition: width 0.5s ease;
}

/* Table */
.table-container {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow-x: auto;
    margin-top: 24px;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
    text-align: left;
}

.data-table th {
    background: rgba(0, 0, 0, 0.3);
    color: var(--text-muted);
    padding: 14px 18px;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 12px;
    letter-spacing: 0.5px;
    border-bottom: 1px solid var(--border-color);
}

.data-table td {
    padding: 16px 18px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
    color: var(--text-main);
}

.data-table tr:hover td {
    background: rgba(255, 255, 255, 0.02);
}

/* Code Blocks */
.code-block {
    background: #060911;
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--radius-sm);
    padding: 16px;
    overflow-x: auto;
    font-family: var(--font-mono);
    font-size: 13px;
    color: #e2e8f0;
    line-height: 1.6;
}

/* Section Header */
.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
}

.section-header h2 {
    font-family: var(--font-heading);
    font-size: 22px;
    font-weight: 700;
}

/* Playground Layout */
.playground-layout {
    display: grid;
    grid-template-columns: 420px 1fr;
    gap: 24px;
}

/* Forms */
.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 6px;
}

.form-input {
    width: 100%;
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 10px 14px;
    color: #fff;
    font-family: var(--font-sans);
    font-size: 14px;
    transition: border-color 0.2s;
}

.form-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.15);
}

/* Modals */
.modal-backdrop {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
    z-index: 999;
    align-items: center;
    justify-content: center;
}

.modal-backdrop.active {
    display: flex;
}

.modal-box {
    background: #111827;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 520px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6);
    animation: modalIn 0.25s ease;
}

@keyframes modalIn {
    from { opacity: 0; transform: scale(0.95); }
    to { opacity: 1; transform: scale(1); }
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
}

.btn-close {
    background: transparent;
    border: none;
    color: var(--text-dim);
    font-size: 24px;
    cursor: pointer;
}

.modal-body {
    padding: 24px;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    padding: 18px 24px;
    border-top: 1px solid var(--border-color);
    background: rgba(0, 0, 0, 0.2);
}

.key-result-box {
    margin-top: 16px;
}

.key-result-box.hidden {
    display: none;
}

.alert {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    margin-bottom: 12px;
}

.alert-warning {
    background: rgba(251, 191, 36, 0.15);
    border: 1px solid rgba(251, 191, 36, 0.3);
    color: #fde68a;
}

.key-display-row {
    display: flex;
    gap: 8px;
}

/* Toast */
.toast {
    position: fixed;
    bottom: 24px;
    right: 24px;
    background: #1e293b;
    border: 1px solid var(--border-color);
    color: #fff;
    padding: 12px 20px;
    border-radius: var(--radius-sm);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    transform: translateY(100px);
    opacity: 0;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    z-index: 1000;
}

.toast.show {
    transform: translateY(0);
    opacity: 1;
}

/* Utilities */
.text-emerald { color: var(--success); }
.text-muted { color: var(--text-muted); }
.text-center { text-align: center; }
.font-mono { font-family: var(--font-mono); }
.loader { color: var(--text-dim); text-align: center; padding: 24px; }

/* Responsive */
@media (max-width: 1024px) {
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .two-col-grid, .playground-layout { grid-template-columns: 1fr; }
    .navbar { flex-wrap: wrap; gap: 16px; }
}

@media (max-width: 640px) {
    .stats-grid { grid-template-columns: 1fr; }
    .hero-banner { flex-direction: column; align-items: flex-start; gap: 20px; }
}