:root {
    --green: #25D366;
    --green-dark: #128C7E;
    --dark: #111b21;
    --bg: #f7f8fa;
    --card: #ffffff;
    --border: #e4e7eb;
    --text: #1f2937;
    --muted: #6b7280;
    --danger: #e11d48;
    --radius: 10px;
}

* { box-sizing: border-box; }

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

a { color: var(--green-dark); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---------- Login page ---------- */
.login-wrap {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}
.login-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 36px;
    width: 100%;
    max-width: 380px;
    box-shadow: 0 6px 24px rgba(0,0,0,0.06);
}
.login-card h1 {
    font-size: 20px;
    margin: 0 0 4px;
}
.login-card p.sub { color: var(--muted); margin: 0 0 24px; font-size: 14px; }

/* ---------- Layout ---------- */
.app {
    display: flex;
    min-height: 100vh;
}
.sidebar {
    width: 230px;
    background: var(--dark);
    color: #e9edef;
    padding: 20px 0;
    flex-shrink: 0;
}
.sidebar .brand {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 0 20px 20px;
    font-weight: 700;
    font-size: 17px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
    margin-bottom: 10px;
}
.sidebar .brand .dot {
    width: 10px; height: 10px; border-radius: 50%;
    background: var(--green);
}
.sidebar nav a {
    display: block;
    padding: 11px 20px;
    color: #d1d7db;
    font-size: 14px;
}
.sidebar nav a:hover { background: rgba(255,255,255,0.06); text-decoration: none; }
.sidebar nav a.active { background: var(--green-dark); color: #fff; }

.main {
    flex: 1;
    padding: 28px 32px;
    max-width: 1100px;
}
.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}
.topbar h1 { font-size: 22px; margin: 0; }
.topbar .user { font-size: 13px; color: var(--muted); }

/* ---------- Cards / stats ---------- */
.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 16px;
    margin-bottom: 28px;
}
.stat-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 18px;
}
.stat-card .num { font-size: 26px; font-weight: 700; }
.stat-card .label { color: var(--muted); font-size: 13px; margin-top: 4px; }

.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 22px;
    margin-bottom: 20px;
}
.card h2 { font-size: 16px; margin: 0 0 16px; }

/* ---------- Forms ---------- */
.form-group { margin-bottom: 16px; }
label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; color: #374151; }
input[type=text], input[type=password], input[type=number], input[type=time],
input[type=date], select, textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
    font-family: inherit;
    background: #fff;
}
textarea { resize: vertical; min-height: 80px; }
.help { color: var(--muted); font-size: 12px; margin-top: 5px; }

.btn {
    display: inline-block;
    background: var(--green-dark);
    color: #fff;
    border: none;
    padding: 10px 18px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
}
.btn:hover { background: var(--dark); text-decoration: none; color: #fff; }
.btn.secondary { background: #fff; color: var(--text); border: 1px solid var(--border); }
.btn.danger { background: var(--danger); }
.btn.small { padding: 6px 12px; font-size: 12px; }
.btn-row { display: flex; gap: 10px; margin-top: 6px; }

.row-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.row-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 16px; }

/* ---------- Tables ---------- */
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: 0.03em; }
tr:last-child td { border-bottom: none; }

.badge {
    display: inline-block;
    padding: 3px 9px;
    border-radius: 999px;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
}
.badge.confirmed { background: #dcfce7; color: #166534; }
.badge.pending { background: #fef9c3; color: #854d0e; }
.badge.cancelled { background: #fee2e2; color: #991b1b; }
.badge.completed { background: #dbeafe; color: #1e40af; }
.badge.active { background: #dcfce7; color: #166534; }
.badge.inactive { background: #f3f4f6; color: #6b7280; }

.alert {
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 18px;
    font-size: 14px;
}
.alert.success { background: #dcfce7; color: #166534; }
.alert.error { background: #fee2e2; color: #991b1b; }

.empty { color: var(--muted); padding: 24px 0; text-align: center; font-size: 14px; }

.status-dot {
    display: inline-block;
    width: 8px; height: 8px; border-radius: 50%;
    margin-right: 6px;
}
.status-dot.on { background: var(--green); }
.status-dot.off { background: var(--danger); }

code.inline {
    background: #f3f4f6;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 12.5px;
}

@media (max-width: 760px) {
    .app { flex-direction: column; }
    .sidebar { width: 100%; }
    .row-2, .row-3 { grid-template-columns: 1fr; }
    .main { padding: 20px; }
}