:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --info: #06b6d4;
    --dark: #111827;
    --light: #f9fafb;
    --border: #e5e7eb;
    --text: #374151;
    --text-dim: #6b7280;
}

* { box-sizing: border-box; }

body {
    background: var(--light);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    margin: 0;
}

.admin-shell {
    display: flex;
    min-height: 100vh;
}

.admin-sidebar {
    width: 260px;
    flex-shrink: 0;
    background: var(--dark);
    color: #d1d5db;
    display: flex;
    flex-direction: column;
    position: sticky;
    top: 0;
    height: 100vh;
}

.admin-sidebar-brand {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 1.25rem;
    font-weight: 700;
    font-size: 1.1rem;
    color: #fff;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.admin-sidebar-brand i { color: var(--primary); font-size: 1.3rem; }
.admin-sidebar-brand small { display: block; font-weight: 400; font-size: 0.7rem; color: var(--text-dim); }

.admin-nav {
    flex: 1;
    padding: 1rem 0.75rem;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.admin-nav-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.65rem 0.9rem;
    border-radius: 8px;
    color: #d1d5db;
    text-decoration: none;
    font-size: 0.9rem;
    transition: background 0.15s;
}

.admin-nav-link i { width: 18px; text-align: center; }
.admin-nav-link:hover { background: rgba(255,255,255,0.06); color: #fff; }
.admin-nav-link.active { background: var(--primary); color: #fff; }

.admin-sidebar-footer {
    padding: 1rem;
    border-top: 1px solid rgba(255,255,255,0.08);
}

.admin-user { display: flex; align-items: center; gap: 0.6rem; margin-bottom: 0.75rem; }
.admin-user-avatar {
    width: 34px; height: 34px; border-radius: 50%;
    background: var(--primary); color: #fff;
    display: flex; align-items: center; justify-content: center;
    font-weight: 700; flex-shrink: 0;
}
.admin-user-name { font-size: 0.85rem; color: #fff; font-weight: 600; }
.admin-user-email { font-size: 0.72rem; color: var(--text-dim); }

.admin-logout-btn {
    display: block; text-align: center;
    padding: 0.5rem; border-radius: 8px;
    background: rgba(239,68,68,0.15); color: #fca5a5;
    text-decoration: none; font-size: 0.82rem;
}
.admin-logout-btn:hover { background: rgba(239,68,68,0.25); color: #fecaca; }

.admin-main {
    flex: 1;
    padding: 2rem;
    max-width: 100%;
    overflow-x: hidden;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.stat-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.25rem;
}

.stat-card-label {
    font-size: 0.78rem;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.4px;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.stat-card-value { font-size: 1.8rem; font-weight: 700; color: var(--dark); }
.stat-card-sub { font-size: 0.78rem; color: var(--text-dim); margin-top: 0.25rem; }

.card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.card h2, .card h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: 1rem; }

table { width: 100%; border-collapse: collapse; }
th {
    background: var(--light);
    padding: 0.65rem 0.75rem;
    text-align: left;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-dim);
    text-transform: uppercase;
    border-bottom: 1px solid var(--border);
}
td { padding: 0.75rem; border-bottom: 1px solid var(--border); font-size: 0.88rem; }
tbody tr:hover { background: var(--light); }

.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #4f46e5 0%, #6366f1 100%);
}

.login-card {
    background: #fff;
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.25);
    max-width: 400px;
    width: 100%;
    padding: 2.5rem;
}

.chat-bubble {
    background: var(--light);
    border-radius: 10px;
    padding: 0.75rem 1rem;
    margin-bottom: 0.5rem;
}
.chat-bubble.user { border-left: 3px solid var(--primary); }
.chat-bubble.ai { border-left: 3px solid var(--success); }
.chat-meta { font-size: 0.72rem; color: var(--text-dim); margin-bottom: 0.25rem; }