:root {
    --bg: #0f172a;
    --bg2: #0b1220;
    --card: #111827;
    --border: #1f2937;
    --text: #f1f5f9;
    --muted: #94a3b8;
    --primary: #1da1f2;
    --primary-hover: #0ea5e9;
    --danger: #ef4444;
}

/* Reset */
* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
    background: linear-gradient(160deg, var(--bg) 0%, var(--bg2) 100%);
    color: var(--text);
}

/* Layout */
.wrap {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
header {
    background: #0b1220;
    border-bottom: 1px solid var(--border);
}

.topbar {
    display: flex;
    align-items: center;
    gap: 20px;
}

.brand img {
    height: 40px;
}

nav {
    display: flex;
    gap: 12px;
    align-items: center;
    margin-left: auto;
}

nav a {
    color: var(--muted);
    text-decoration: none;
    padding: 8px 14px;
    border-radius: 10px;
    transition: 0.2s ease;
}

nav a:hover {
    background: rgba(255,255,255,0.05);
    color: var(--text);
}

nav a.active {
    background: rgba(29,161,242,0.15);
    color: var(--primary);
}

/* Cards */
.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 24px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.4);
}

h1 {
    margin-top: 0;
    font-size: 28px;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 10px 18px;
    border-radius: 12px;
    background: var(--primary);
    color: #fff;
    text-decoration: none;
    font-weight: 500;
    transition: 0.2s ease;
    border: none;
    cursor: pointer;
}

.btn:hover {
    background: var(--primary-hover);
}

.btn.secondary {
    background: #374151;
}

.btn.secondary:hover {
    background: #4b5563;
}

.btn.danger {
    background: var(--danger);
}

.btn.danger:hover {
    opacity: 0.9;
}

/* Forms */
label {
    font-size: 14px;
    color: var(--muted);
}

input,
select,
textarea {
    width: 100%;
    padding: 10px 12px;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: #0b1220;
    color: var(--text);
    margin-top: 4px;
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--primary);
}

/* Tables */
table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

th, td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

th {
    font-weight: 600;
    color: var(--muted);
}

tr:hover {
    background: rgba(255,255,255,0.03);
}

/* Alerts */
.alert {
    padding: 12px;
    border-radius: 10px;
    margin-bottom: 16px;
}

.alert.error {
    background: rgba(239,68,68,0.15);
    color: #fca5a5;
}

.alert.success {
    background: rgba(34,197,94,0.15);
    color: #86efac;
}

/* Grid helpers */
.flex {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

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