@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
    --bg-color: #070b11;
    --surface-color: #0d1320;
    --surface-2: #121929;
    --border-color: rgba(99, 130, 179, 0.12);
    --border-hover: rgba(99, 130, 179, 0.25);
    --hover-bg: rgba(99, 130, 179, 0.06);
    --overlay-bg: rgba(0, 5, 15, 0.88);

    --text-primary: #e8edf5;
    --text-secondary: #6b7fa0;
    --text-muted: #3d4f6a;

    --accent: #3b82f6;
    --accent-glow: rgba(59, 130, 246, 0.15);
    --accent-hover: #2563eb;
    --success-color: #10b981;
    --success-glow: rgba(16, 185, 129, 0.12);
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --purple: #8b5cf6;

    --code-bg: #040810;
    --code-font: 'JetBrains Mono', 'SFMono-Regular', Consolas, monospace;

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 20px;

    --transition: 0.18s cubic-bezier(0.4, 0, 0.2, 1);
}

* { box-sizing: border-box; }

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-color);
    color: var(--text-primary);
    margin: 0;
    display: flex;
    flex-direction: column;
    height: 100vh;
    overflow: hidden;
    font-size: 14px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

h2 {
    font-size: 22px;
    font-weight: 600;
    margin: 0 0 24px 0;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
    letter-spacing: -0.3px;
}
h3 {
    font-size: 15px;
    font-weight: 600;
    margin: 28px 0 14px 0;
    color: var(--text-primary);
    letter-spacing: -0.2px;
}
h4 { font-size: 13px; font-weight: 600; margin: 20px 0 10px 0; color: var(--text-primary); }
a { text-decoration: none; color: inherit; }

::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(99, 130, 179, 0.2); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(99, 130, 179, 0.35); }

.top-bar {
    height: 56px;
    padding: 0 24px;
    background: rgba(7, 11, 17, 0.95);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-shrink: 0;
    z-index: 10;
    backdrop-filter: blur(12px);
}
.brand {
    font-weight: 600;
    font-size: 15px;
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    color: var(--text-primary);
    letter-spacing: -0.2px;
}
.brand::before {
    content: '';
    display: inline-block;
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 8px var(--accent);
}

.main-container { display: flex; flex: 1; overflow: hidden; }

.sidebar {
    width: 220px;
    background: var(--bg-color);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    padding-top: 16px;
    flex-shrink: 0;
    overflow-y: auto;
}

.content {
    flex: 1;
    padding: 32px 44px;
    overflow-y: auto;
    position: relative;
}

.nav-group-title {
    padding: 0 16px;
    margin: 0 0 6px 0;
    font-size: 10px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}
.sidebar-nav { margin-bottom: 20px; }
.sidebar-nav a {
    padding: 7px 14px;
    margin: 1px 10px;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    display: block;
    transition: all var(--transition);
    font-size: 13px;
    cursor: pointer;
    position: relative;
}
.sidebar-nav a:hover {
    background: var(--hover-bg);
    color: var(--text-primary);
}
.sidebar-nav a.active {
    background: rgba(59, 130, 246, 0.1);
    color: var(--accent);
    font-weight: 500;
}
.sidebar-nav a.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 2px;
    height: 60%;
    background: var(--accent);
    border-radius: 1px;
}

.btn {
    background: var(--surface-2);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 6px 14px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 12px;
    font-weight: 500;
    transition: all var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    font-family: inherit;
    letter-spacing: 0.1px;
}
.btn:hover {
    background: var(--hover-bg);
    border-color: var(--border-hover);
    color: var(--text-primary);
}
.btn-primary {
    background: var(--accent);
    color: #fff;
    border-color: transparent;
    font-weight: 600;
}
.btn-primary:hover { background: var(--accent-hover); }
.btn-danger { background: rgba(239, 68, 68, 0.12); color: var(--danger-color); border-color: rgba(239, 68, 68, 0.25); }
.btn-danger:hover { background: rgba(239, 68, 68, 0.2); }


.card {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 20px 24px;
    margin-bottom: 20px;
    transition: border-color var(--transition);
}
.card:hover { border-color: var(--border-hover); }

.data-table { width: 100%; border-collapse: collapse; }
.data-table th {
    text-align: left;
    padding: 10px 16px;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border-color);
    font-weight: 500;
    font-size: 11px;
    background: var(--surface-color);
    text-transform: uppercase;
    letter-spacing: 0.6px;
}
.data-table td {
    padding: 11px 16px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
    font-size: 13px;
}
.data-table tr:last-child td { border-bottom: none; }
.data-table tr:hover td { background: var(--hover-bg); }

.tab-nav {
    display: flex;
    gap: 0;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 24px;
}
.tab-item {
    padding: 10px 18px;
    cursor: pointer;
    color: var(--text-secondary);
    border-bottom: 2px solid transparent;
    font-size: 13px;
    font-weight: 500;
    transition: all var(--transition);
    margin-bottom: -1px;
}
.tab-item:hover { color: var(--text-primary); }
.tab-item.active {
    color: var(--text-primary);
    border-bottom-color: var(--accent);
}
.tab-sub-section { display: none; }
.tab-sub-section.active { display: block; animation: fadeEffect 0.2s; }

.badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 100px;
    font-size: 11px;
    font-weight: 500;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    letter-spacing: 0.2px;
}

.code-container {
    position: relative;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    background: var(--code-bg);
    margin-bottom: 20px;
    transition: border-color var(--transition);
}
.code-container:hover { border-color: var(--border-hover); }
.code-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 14px;
    background: rgba(255,255,255,0.02);
    border-bottom: 1px solid var(--border-color);
    font-size: 11px;
    color: var(--text-muted);
    font-family: var(--code-font);
    letter-spacing: 0.3px;
}
pre {
    margin: 0;
    padding: 16px;
    overflow-x: auto;
    font-family: var(--code-font);
    font-size: 12.5px;
    line-height: 1.65;
}
code { font-family: var(--code-font); }

.range-picker {
    display: flex;
    background: var(--surface-2);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 3px;
    gap: 2px;
}
.range-btn {
    border: none;
    background: transparent;
    color: var(--text-secondary);
    padding: 4px 12px;
    font-size: 12px;
    cursor: pointer;
    border-radius: 4px;
    font-family: inherit;
    font-weight: 500;
    transition: all var(--transition);
}
.range-btn.active {
    background: var(--surface-color);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.hero-section {
    display: flex;
    gap: 40px;
    margin-bottom: 56px;
    align-items: center;
}
.hero-content { flex: 1; min-width: 300px; }
.hero-title {
    font-size: 30px;
    font-weight: 700;
    line-height: 1.25;
    margin-bottom: 14px;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}
.hero-title span {
    background: linear-gradient(135deg, var(--accent) 0%, var(--purple) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.hero-desc {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 24px;
    line-height: 1.7;
}

.hero-code-window {
    flex: 1;
    background: var(--code-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    height: 400px;
    min-width: 0;
    position: relative;
}
@media (max-width: 1024px) { .hero-code-window { display: none; } }

.window-header {
    background: rgba(255,255,255,0.025);
    padding: 10px 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}
.header-controls { display: flex; gap: 7px; }
.dot {
    width: 11px;
    height: 11px;
    border-radius: 50%;
    opacity: 0.8;
}
.dot-red { background: #ff5f56; }
.dot-yellow { background: #ffbd2e; }
.dot-green { background: #27c93f; }

.copy-icon-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    border-radius: 5px;
    padding: 4px 8px;
    font-size: 11px;
    cursor: pointer;
    transition: all var(--transition);
    display: flex;
    align-items: center;
    gap: 5px;
    font-family: inherit;
}
.copy-icon-btn:hover {
    background: var(--hover-bg);
    color: var(--text-primary);
    border-color: var(--border-hover);
}

.code-scroll-container { flex: 1; overflow: auto; }
.code-scroll-container pre { background: transparent; }

.model-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 14px;
    margin-bottom: 44px;
}
.tech-card {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 20px;
    position: relative;
    transition: all var(--transition);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    cursor: default;
}
.tech-card::after {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 1px;
    background: var(--line-color, var(--accent));
    opacity: 0.5;
    transition: opacity var(--transition);
}
.tech-card:hover {
    transform: translateY(-2px);
    border-color: var(--border-hover);
    background: var(--surface-2);
}
.tech-card:hover::after { opacity: 1; }
.tech-card h3 {
    font-size: 15px;
    margin: 0 0 8px 0;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}
.tech-card p {
    font-size: 12.5px;
    color: var(--text-secondary);
    line-height: 1.55;
    margin: 0;
}

.action-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-top: 16px;
}
.action-item {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    padding: 14px 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition);
    background: var(--surface-color);
}
.action-item:hover {
    background: var(--surface-2);
    border-color: var(--border-hover);
    transform: translateY(-1px);
}
.action-icon-box {
    width: 36px;
    height: 36px;
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
    flex-shrink: 0;
}
.action-title { font-size: 13px; font-weight: 600; color: var(--text-primary); margin-bottom: 3px; }
.action-desc { font-size: 12px; color: var(--text-secondary); line-height: 1.4; }

.balance-dashboard {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1px;
    background: var(--border-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    margin-bottom: 24px;
}
.balance-item {
    background: var(--surface-color);
    padding: 20px 22px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    transition: background var(--transition);
}
.balance-item:hover { background: var(--surface-2); }
.balance-label { font-size: 11px; color: var(--text-muted); margin-bottom: 8px; text-transform: uppercase; letter-spacing: 0.6px; font-weight: 500; }
.balance-value { font-size: 24px; font-weight: 600; letter-spacing: -0.5px; }

.modal-overlay {
    display: none;
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: var(--overlay-bg);
    backdrop-filter: blur(8px);
    z-index: 2000;
    justify-content: center;
    align-items: center;
}
.modal-box {
    background: var(--surface-color);
    border: 1px solid var(--border-hover);
    border-radius: var(--radius-xl);
    width: 450px;
    box-shadow: 0 24px 64px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(255,255,255,0.03);
    animation: slideUp 0.22s cubic-bezier(0.34, 1.3, 0.64, 1);
}
.modal-header {
    padding: 16px 22px;
    border-bottom: 1px solid var(--border-color);
    font-weight: 600;
    font-size: 14px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.modal-body { padding: 22px; }
.modal-footer {
    padding: 14px 22px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    background: rgba(0,0,0,0.15);
    border-radius: 0 0 var(--radius-xl) var(--radius-xl);
}

.page-section { display: none; }
.page-section.active { display: block; animation: fadeEffect 0.2s; }

@keyframes fadeEffect {
    from { opacity: 0.5; transform: translateY(6px); }
    to { opacity: 1; transform: translateY(0); }
}
@keyframes slideUp {
    from { transform: translateY(16px) scale(0.97); opacity: 0; }
    to { transform: translateY(0) scale(1); opacity: 1; }
}

.promo-box {
    background: rgba(59, 130, 246, 0.05);
    border: 1px solid rgba(59, 130, 246, 0.18);
    border-radius: var(--radius-md);
    padding: 14px 16px;
    margin-bottom: 20px;
}
.promo-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--accent);
    margin-bottom: 6px;
    display: flex;
    align-items: center;
    gap: 6px;
}
.promo-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 6px;
}
.promo-item {
    font-size: 11px;
    color: var(--text-secondary);
    background: var(--surface-2);
    border: 1px solid var(--border-color);
    padding: 6px 8px;
    border-radius: var(--radius-sm);
    display: flex;
    flex-direction: column;
    gap: 2px;
    text-align: center;
}
.promo-item span {
    color: var(--warning-color);
    font-weight: 600;
    font-size: 12px;
}
.promo-item.highlight {
    border-color: rgba(245, 158, 11, 0.3);
    background: rgba(245, 158, 11, 0.06);
}
.arrival-preview {
    background: var(--code-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 14px 16px;
    font-size: 13px;
    color: var(--text-secondary);
}

.token-packages-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 14px;
}
.token-pkg-card {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 22px 20px;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}
.token-pkg-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 1px;
    background: var(--accent);
    opacity: 0;
    transition: opacity var(--transition);
}
.token-pkg-card:hover {
    border-color: rgba(59, 130, 246, 0.3);
    transform: translateY(-3px);
    background: var(--surface-2);
}
.token-pkg-card:hover::before { opacity: 1; }
.token-pkg-card .pkg-amount {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 6px;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 6px;
    letter-spacing: -0.3px;
}
.token-pkg-card .pkg-price {
    font-size: 15px;
    color: var(--accent);
    font-weight: 600;
    margin-bottom: 18px;
}
.token-pkg-card .pkg-btn {
    background: rgba(59,130,246,0.1);
    border: 1px solid rgba(59,130,246,0.2);
    color: var(--accent);
    padding: 8px 0;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 13px;
    transition: all var(--transition);
    width: 100%;
}
.token-pkg-card:hover .pkg-btn {
    background: var(--accent);
    border-color: transparent;
    color: #fff;
}

.info-icon-circle {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    border: 1px solid var(--text-muted);
    color: var(--text-muted);
    font-size: 9px;
    font-weight: 700;
    cursor: help;
    transition: all var(--transition);
}
.info-icon-circle:hover {
    color: var(--accent);
    border-color: var(--accent);
}

input[type="number"],
input[type="text"] {
    background: var(--surface-2);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-family: inherit;
    transition: border-color var(--transition);
    outline: none;
}
input[type="number"]:focus,
input[type="text"]:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.12);
}

.arrival-preview {
    background: var(--code-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 14px 16px;
    font-size: 13px;
    color: var(--text-secondary);
}

@media (max-width: 768px) {
    .action-grid, .model-grid { grid-template-columns: 1fr; }
    .promo-grid { grid-template-columns: repeat(2, 1fr); }
    .content { padding: 20px 20px; }
}
@media (max-width: 900px) {
    .token-packages-grid { grid-template-columns: repeat(2, 1fr); }
    .balance-dashboard { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
    .token-packages-grid { grid-template-columns: 1fr; }
}