:root {
    --bg: #09090b;
    --bg-surface: #131316;
    --bg-surface-2: #18181c;
    --bg-hover: rgba(255, 255, 255, 0.03);
    --border: rgba(255, 255, 255, 0.06);
    --border-accent: rgba(139, 92, 246, 0.15);
    --text: #fafafa;
    --text-secondary: #a1a1aa;
    --text-dim: #52525b;
    --accent: #8b5cf6;
    --accent-light: #a78bfa;
    --accent-glow: rgba(139, 92, 246, 0.2);
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --radius: 12px;
    --radius-lg: 16px;
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
    --sidebar-width: 280px;
}

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

body {
    background: var(--bg);
    color: var(--text);
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
#sidebar {
    width: var(--sidebar-width);
    background: var(--bg-surface);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    z-index: 1000;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.sidebar-header {
    padding: 24px;
    border-bottom: 1px solid var(--border);
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.brand-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--accent), #a855f7);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 16px;
    box-shadow: 0 0 16px var(--accent-glow);
}

.brand-text {
    font-size: 20px;
    font-weight: 800;
    color: #fff;
    letter-spacing: -0.5px;
}

.sidebar-nav {
    flex: 1;
    overflow-y: auto;
    padding: 24px 16px;
}

.nav-label {
    font-size: 11px;
    font-weight: 700;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 1.2px;
    margin-bottom: 12px;
    padding-left: 12px;
}

.nav-list {
    list-style: none;
    margin-bottom: 32px;
}

.nav-item {
    margin-bottom: 4px;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border-radius: 10px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.2s;
}

.nav-link:hover {
    background: var(--bg-hover);
    color: var(--text);
}

.nav-link.active {
    background: rgba(139, 92, 246, 0.1);
    color: var(--accent-light);
}

.nav-link i {
    width: 18px;
    text-align: center;
    font-size: 16px;
}

.sidebar-footer {
    padding: 16px;
    border-top: 1px solid var(--border);
    background: rgba(0, 0, 0, 0.1);
}

.user-panel {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    border-radius: 12px;
    text-decoration: none;
    transition: background 0.2s;
}

.user-panel:hover {
    background: var(--bg-hover);
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    object-fit: cover;
    background: var(--bg-surface-2);
}

.user-info {
    flex: 1;
    min-width: 0;
}

.user-name {
    font-size: 14px;
    font-weight: 700;
    color: #fff;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Navbar */
#navbar {
    position: fixed;
    top: 0;
    right: 0;
    left: var(--sidebar-width);
    height: 64px;
    background: rgba(9, 9, 11, 0.6);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 40px;
    z-index: 900;
}

.navbar-btn {
    width: 36px;
    height: 36px;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
}

.navbar-btn:hover {
    background: var(--bg-hover);
    color: #fff;
    border-color: var(--text-dim);
}

/* Main Layout */
#main-wrapper {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding-top: 64px;
    min-height: 100vh;
}

#page-content {
    padding: 40px;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

/* Components */
.card {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    margin-bottom: 24px;
}

.card-header {
    padding: 20px 24px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-title {
    font-size: 16px;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 10px;
}

.card-body {
    padding: 24px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
    border: none;
    transition: all 0.2s;
    font-family: inherit;
    text-decoration: none;
}

.btn-primary {
    background: var(--accent);
    color: #fff;
    box-shadow: 0 4px 12px rgba(139, 92, 246, 0.2);
}

.btn-primary:hover {
    background: #7c3aed;
    transform: translateY(-1px);
    box-shadow: 0 8px 20px rgba(139, 92, 246, 0.3);
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-secondary);
}

.btn-outline:hover {
    background: var(--bg-hover);
    color: #fff;
    border-color: var(--text-dim);
}

.icon-btn {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-surface-2);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
}

.icon-btn:hover {
    color: #fff;
    border-color: var(--accent);
}

/* Inputs */
.ba-input, .ba-select {
    width: 100%;
    background: #0c0c0e;
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 12px 14px;
    color: #fff;
    font-family: inherit;
    font-size: 14px;
    outline: none;
    transition: all 0.2s;
}

.ba-input:focus, .ba-select:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 4px rgba(139, 92, 246, 0.08);
}

/* Toast */
#toast-container {
    position: fixed;
    bottom: 32px;
    right: 32px;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.toast {
    background: var(--bg-surface-2);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 14px 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    color: #fff;
    font-size: 14px;
    font-weight: 600;
    min-width: 280px;
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.4);
    animation: slideIn 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
}

@keyframes slideIn {
    from { transform: translateX(30px); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

/* Responsive */
@media (max-width: 992px) {
    #sidebar {
        transform: translateX(-100%);
    }
    #sidebar.open {
        transform: translateX(0);
    }
    #navbar {
        left: 0;
        padding: 0 20px;
    }
    #main-wrapper {
        margin-left: 0;
    }
}

/* Grids */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }

@media (max-width: 768px) {
    .grid-2, .grid-3 { grid-template-columns: 1fr; }
}

/* Tier Usage Stats */
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
@media (max-width: 1200px) { .grid-4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .grid-4 { grid-template-columns: 1fr; } }

.usage-stat {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.stat-progress {
    height: 6px;
    background: var(--bg-surface-2);
    border-radius: 3px;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background: var(--accent);
    border-radius: 3px;
    transition: width 0.5s ease;
}

.stat-desc {
    font-size: 11px;
    font-weight: 700;
    color: var(--text-dim);
    text-transform: uppercase;
}

.stat-value {
    font-weight: 800;
    color: var(--text);
}

.flex { display: flex; }
.justify-between { justify-content: space-between; }
.align-center { align-items: center; }
.gap-2 { gap: 8px; }
.mb-2 { margin-bottom: 8px; }
.mb-4 { margin-bottom: 16px; }
.mt-4 { margin-top: 16px; }
.mr-2 { margin-right: 8px; }
.w-full { width: 100%; }