:root {
    --primary: #4f46e5;
    --primary-dark: #4338ca;
    --success: #16a34a;
    --danger: #dc2626;
    --warning: #d97706;
    --bg: #f4f5f9;
    --panel: #ffffff;
    --border: #e5e7eb;
    --text: #1f2430;
    --muted: #6b7280;
    --radius: 10px;
}
* { box-sizing: border-box; }
body {
    margin: 0; background: var(--bg); color: var(--text);
    font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    font-size: 14.5px; line-height: 1.5;
}
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---- layout shell ---- */
.app-shell { display: flex; min-height: 100vh; }
.sidebar {
    width: 230px; background: #171b2b; color: #cbd0dc; flex-shrink: 0;
    display: flex; flex-direction: column; padding: 18px 0;
}
.sidebar .brand { padding: 0 20px 18px; font-weight: 700; font-size: 16px; color: #fff; }
.sidebar .brand span { color: var(--primary); }
.sidebar nav { flex: 1; }
.sidebar a {
    display: flex; align-items: center; gap: 10px; padding: 10px 20px; color: #b7bdcc;
    font-size: 13.5px; text-decoration: none; border-left: 3px solid transparent;
}
.sidebar a:hover { background: #1f2436; color: #fff; text-decoration: none; }
.sidebar a.active { background: #1f2436; color: #fff; border-left-color: var(--primary); }
.sidebar .footer-link { padding: 10px 20px; font-size: 12.5px; color: #7a8092; }

.main { flex: 1; min-width: 0; }
.topbar {
    background: var(--panel); border-bottom: 1px solid var(--border);
    padding: 14px 26px; display: flex; align-items: center; justify-content: space-between;
}
.topbar h1 { font-size: 18px; margin: 0; }
.content { padding: 26px; max-width: 1200px; }

/* ---- panels / cards ---- */
.panel { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px 22px; margin-bottom: 20px; }
.panel h2, .panel h3 { margin-top: 0; }
.stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-bottom: 20px; }
.stat-card { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; }
.stat-num { font-size: 24px; font-weight: 700; }
.stat-label { color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: .03em; margin-top: 4px; }

/* ---- forms ---- */
label { display: block; font-size: 12.5px; font-weight: 600; color: #465065; margin: 12px 0 5px; }
label:first-child { margin-top: 0; }
input[type=text], input[type=email], input[type=password], input[type=number], input[type=url], input[type=date], select, textarea {
    width: 100%; padding: 9px 12px; border: 1px solid var(--border); border-radius: 7px; font-size: 13.5px;
    background: #fff; color: var(--text);
}
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--primary); }
.form-hint { color: var(--muted); font-size: 12px; margin-top: 4px; }
.checkbox-row { display: flex; align-items: center; gap: 8px; font-weight: 600; font-size: 13px; margin: 12px 0; }
.checkbox-row input { width: auto; }

/* ---- buttons ---- */
.btn {
    display: inline-flex; align-items: center; gap: 6px; padding: 9px 16px; border-radius: 7px;
    border: 1px solid var(--border); background: #fff; color: var(--text); font-size: 13.5px; cursor: pointer;
}
.btn:hover { background: #f4f5f9; text-decoration: none; }
.btn-primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); color: #fff; }
.btn-danger { background: var(--danger); border-color: var(--danger); color: #fff; }
.btn-danger:hover { opacity: .9; color: #fff; }
.btn-sm { padding: 5px 11px; font-size: 12.5px; }
.actions-row { display: flex; gap: 10px; margin-top: 16px; flex-wrap: wrap; }

/* ---- tables ---- */
table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
th { text-align: left; padding: 9px 10px; border-bottom: 2px solid var(--border); color: var(--muted); font-weight: 600; }
td { padding: 10px; border-bottom: 1px solid #f0f1f5; vertical-align: middle; }

/* ---- badges / pills ---- */
.badge { padding: 3px 10px; border-radius: 20px; font-size: 11.5px; font-weight: 600; }
.badge-success { background: #e7f7ec; color: var(--success); }
.badge-warning { background: #fef3e0; color: var(--warning); }
.badge-danger { background: #fdecec; color: var(--danger); }
.badge-muted { background: #eef0f3; color: var(--muted); }

/* ---- plan cards ---- */
.plan-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.plan-card { background: var(--panel); border: 2px solid var(--border); border-radius: var(--radius); padding: 22px; text-align: center; }
.plan-card.current { border-color: var(--primary); background: #f8f7ff; }
.plan-card .price { font-size: 28px; font-weight: 700; margin: 10px 0; }
.plan-card .price small { font-size: 13px; color: var(--muted); font-weight: 400; }
.plan-card ul { list-style: none; padding: 0; margin: 16px 0; text-align: left; font-size: 13px; color: #465065; }
.plan-card li { padding: 5px 0; }

/* ---- alerts / flash messages ---- */
.alert { padding: 12px 16px; border-radius: 7px; margin-bottom: 16px; font-size: 13.5px; }
.alert-success { background: #e7f7ec; color: #166534; border: 1px solid #b8e6c5; }
.alert-error { background: #fdecec; color: #991b1b; border: 1px solid #f3bcbc; }
.alert-info { background: #eaf1ff; color: #1e3a8a; border: 1px solid #c3d7ff; }

/* ---- auth pages ---- */
.auth-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; background: var(--bg); padding: 20px; }
.auth-card { background: #fff; border-radius: 14px; box-shadow: 0 10px 40px rgba(0,0,0,.08); padding: 34px; width: 100%; max-width: 400px; }
.auth-card h1 { font-size: 20px; margin-bottom: 4px; }
.auth-card .sub { color: var(--muted); font-size: 13px; margin-bottom: 20px; }

.code-block { background: #171b2b; color: #d7ffd9; padding: 12px 14px; border-radius: 7px; font-family: monospace; font-size: 12.5px; overflow-x: auto; white-space: pre-wrap; word-break: break-all; }
.muted { color: var(--muted); }

@media (max-width: 900px) {
    .stat-grid, .plan-grid { grid-template-columns: 1fr; }
    .app-shell { flex-direction: column; }
    .sidebar { width: 100%; }
}