:root {
    --bg-primary: #0a1628;
    --bg-secondary: #0f1d35;
    --bg-card: rgba(26, 42, 74, 0.6);
    --bg-card-hover: rgba(26, 42, 74, 0.9);
    --bg-input: rgba(15, 29, 53, 0.8);
    --border-color: rgba(0, 212, 255, 0.15);
    --border-glow: rgba(0, 212, 255, 0.4);
    --text-primary: #e8edf5;
    --text-secondary: #8899b4;
    --text-muted: #5a6d85;
    --accent: #00d4ff;
    --accent-glow: rgba(0, 212, 255, 0.3);
    --success: #00ff88;
    --success-glow: rgba(0, 255, 136, 0.3);
    --warning: #ffb347;
    --danger: #ff4757;
    --danger-glow: rgba(255, 71, 87, 0.3);
    --radius: 12px;
    --radius-sm: 8px;
    --radius-lg: 16px;
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 20px var(--accent-glow);
    --font-mono: 'SF Mono', 'Cascadia Code', 'Consolas', monospace;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html, body {
    height: 100%;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

body {
    background: linear-gradient(135deg, #0a1628 0%, #0f1d35 30%, #162447 60%, #0a1628 100%);
    background-attachment: fixed;
}

::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-secondary); }
::-webkit-scrollbar-thumb { background: var(--accent); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-secondary); }

a { color: var(--accent); text-decoration: none; }
a:hover { text-shadow: 0 0 10px var(--accent-glow); }

/* Grid background animation */
.bg-grid {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    pointer-events: none; z-index: 0;
    background-image:
        linear-gradient(rgba(0,212,255,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0,212,255,0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: gridMove 20s linear infinite;
}
@keyframes gridMove { 0% { background-position: 0 0; } 100% { background-position: 50px 50px; } }

/* Particles */
.particles { position: fixed; top: 0; left: 0; width: 100%; height: 100%; pointer-events: none; z-index: 0; }

/* Glass card */
.glass-card {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: all var(--transition);
}
.glass-card:hover {
    border-color: var(--border-glow);
    box-shadow: var(--shadow), var(--shadow-glow);
}

/* Buttons */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    padding: 10px 24px; border-radius: var(--radius-sm); font-size: 14px; font-weight: 600;
    border: none; cursor: pointer; transition: all var(--transition); letter-spacing: 0.5px;
}
.btn-primary {
    background: linear-gradient(135deg, var(--accent), #0099ff);
    color: #fff; box-shadow: 0 4px 15px var(--accent-glow);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 6px 25px var(--accent-glow); }
.btn-success {
    background: linear-gradient(135deg, var(--success), #00cc6a);
    color: #0a1628;
}
.btn-danger {
    background: linear-gradient(135deg, var(--danger), #ff3366);
    color: #fff;
}
.btn-outline {
    background: transparent; border: 1px solid var(--border-color); color: var(--text-primary);
}
.btn-outline:hover { border-color: var(--accent); color: var(--accent); }
.btn-sm { padding: 6px 14px; font-size: 12px; }
.btn-lg { padding: 14px 32px; font-size: 16px; }
.btn-icon { width: 36px; height: 36px; padding: 0; border-radius: 50%; }

/* Forms */
.form-group { margin-bottom: 20px; }
.form-label { display: block; margin-bottom: 8px; color: var(--text-secondary); font-size: 13px; font-weight: 600; text-transform: uppercase; letter-spacing: 1px; }
.form-input, .form-select, .form-textarea {
    width: 100%; padding: 12px 16px;
    background: var(--bg-input); border: 1px solid var(--border-color);
    border-radius: var(--radius-sm); color: var(--text-primary); font-size: 14px;
    transition: all var(--transition); outline: none;
}
.form-input:focus, .form-select:focus, .form-textarea:focus {
    border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow);
}
.form-input::placeholder { color: var(--text-muted); }
.form-select { appearance: none; cursor: pointer; }
.form-textarea { resize: vertical; min-height: 100px; }

/* Tables */
.data-table { width: 100%; border-collapse: collapse; }
.data-table th {
    text-align: left; padding: 14px 16px;
    background: rgba(0, 212, 255, 0.05);
    color: var(--text-secondary); font-size: 12px; font-weight: 700;
    text-transform: uppercase; letter-spacing: 1px;
    border-bottom: 2px solid var(--border-color);
}
.data-table td {
    padding: 14px 16px; border-bottom: 1px solid rgba(0, 212, 255, 0.05);
    font-size: 14px;
}
.data-table tr:hover td { background: rgba(0, 212, 255, 0.03); }

/* Badge */
.badge {
    display: inline-block; padding: 4px 12px; border-radius: 20px;
    font-size: 11px; font-weight: 700; letter-spacing: 0.5px;
}
.badge-accent { background: var(--accent-glow); color: var(--accent); }
.badge-success { background: var(--success-glow); color: var(--success); }
.badge-danger { background: var(--danger-glow); color: var(--danger); }
.badge-warning { background: rgba(255, 179, 71, 0.2); color: var(--warning); }

/* Stats Card */
.stat-card {
    padding: 24px; position: relative; overflow: hidden;
}
.stat-card .stat-icon {
    position: absolute; right: 20px; top: 20px; font-size: 40px; opacity: 0.15;
}
.stat-card .stat-value {
    font-size: 36px; font-weight: 800; font-family: var(--font-mono);
    background: linear-gradient(135deg, var(--text-primary), var(--accent));
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.stat-card .stat-label { font-size: 13px; color: var(--text-secondary); margin-top: 4px; text-transform: uppercase; letter-spacing: 1px; }
.stat-card .stat-change { font-size: 12px; margin-top: 8px; }

/* Modal */
.modal-overlay {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0,0,0,0.6); z-index: 1000;
    display: flex; align-items: center; justify-content: center;
    animation: fadeIn 0.2s ease;
}
.modal-box {
    background: var(--bg-secondary); border: 1px solid var(--border-color);
    border-radius: var(--radius-lg); padding: 32px; max-width: 600px; width: 90%;
    max-height: 80vh; overflow-y: auto; box-shadow: 0 20px 60px rgba(0,0,0,0.5);
    animation: slideUp 0.3s ease;
}
.modal-title { font-size: 20px; font-weight: 700; margin-bottom: 24px; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes slideUp { from { transform: translateY(30px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }

/* Pagination */
.pagination { display: flex; gap: 6px; justify-content: center; align-items: center; margin-top: 24px; }
.pagination button {
    width: 36px; height: 36px; border-radius: var(--radius-sm);
    background: var(--bg-card); border: 1px solid var(--border-color); color: var(--text-primary);
    cursor: pointer; transition: all var(--transition); font-size: 13px;
}
.pagination button:hover, .pagination button.active {
    background: var(--accent); color: #fff; border-color: var(--accent);
}
.pagination button:disabled { opacity: 0.4; cursor: not-allowed; }

/* Toast */
.toast-container { position: fixed; top: 20px; right: 20px; z-index: 9999; display: flex; flex-direction: column; gap: 10px; }
.toast {
    padding: 14px 20px; border-radius: var(--radius-sm); font-size: 14px;
    animation: slideIn 0.3s ease; min-width: 280px;
    display: flex; align-items: center; gap: 10px;
}
.toast-success { background: linear-gradient(135deg, #00b86c, var(--success)); color: #fff; }
.toast-error { background: linear-gradient(135deg, #e84118, var(--danger)); color: #fff; }
.toast-info { background: linear-gradient(135deg, #0984e3, var(--accent)); color: #fff; }
@keyframes slideIn { from { transform: translateX(100%); } to { transform: translateX(0); } }

/* Loading spinner */
.spinner {
    width: 40px; height: 40px; border: 3px solid var(--border-color);
    border-top-color: var(--accent); border-radius: 50%;
    animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Search bar */
.search-bar {
    display: flex; gap: 12px; align-items: center; flex-wrap: wrap;
}
.search-input {
    padding: 10px 16px;
    background: var(--bg-input); border: 1px solid var(--border-color);
    border-radius: var(--radius-sm); color: var(--text-primary);
    font-size: 14px; min-width: 240px; outline: none; transition: all var(--transition);
}
.search-input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow); }

/* Utility */
.flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 12px; }
.gap-4 { gap: 16px; }
.gap-6 { gap: 24px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.mt-2 { margin-top: 8px; }
.mt-4 { margin-top: 16px; }
.mt-6 { margin-top: 24px; }
.mb-4 { margin-bottom: 16px; }
.mb-6 { margin-bottom: 24px; }
.p-4 { padding: 16px; }
.p-6 { padding: 24px; }
.text-center { text-align: center; }
.text-muted { color: var(--text-muted); }
.text-accent { color: var(--accent); }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.font-mono { font-family: var(--font-mono); }
.text-sm { font-size: 12px; }
.text-lg { font-size: 18px; }
.text-xl { font-size: 24px; }
.text-2xl { font-size: 32px; }
.font-bold { font-weight: 700; }
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.w-full { width: 100%; }
.relative { position: relative; }

/* Responsive */
@media (max-width: 1200px) {
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}