:root {
    --primary: #1e56c9;
    --accent: #17b999;
    --gradient: linear-gradient(90deg, var(--primary), var(--accent));
    --bg: #f2f5fa;
    --card: #ffffff;
    --border: #e3eaf3;
    --text: #10233f;
    --text-muted: #5b6b82;
    --radius: 12px;
}
* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
}
a { text-decoration: none; color: inherit; }

/* ---- Login page ---- */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #e9f1ff, #e7fbf5);
}
.login-box {
    background: #fff;
    padding: 40px;
    border-radius: 18px;
    width: 360px;
    box-shadow: 0 20px 50px rgba(16,35,63,.12);
}
.login-box h1 { font-size: 22px; margin-bottom: 4px; text-align: center; }
.login-box p.sub { text-align: center; color: var(--text-muted); font-size: 14px; margin-bottom: 24px; }
.login-brand { display: flex; align-items: center; justify-content: center; gap: 10px; margin-bottom: 18px; }
.login-brand .mark {
    width: 40px; height: 40px; border-radius: 12px; background: var(--gradient);
    color: #fff; font-weight: 800; display: flex; align-items: center; justify-content: center;
}

/* ---- Layout ---- */
.admin-shell { display: flex; min-height: 100vh; }
.sidebar {
    width: 230px;
    background: #101c33;
    color: #c9d4e5;
    flex-shrink: 0;
    padding: 22px 0;
}
.sidebar .brand { display: flex; align-items: center; gap: 10px; padding: 0 20px 20px; color: #fff; font-weight: 800; font-size: 17px; }
.sidebar .brand .mark {
    width: 34px; height: 34px; border-radius: 10px; background: var(--gradient);
    display: flex; align-items: center; justify-content: center; font-size: 15px;
}
.sidebar nav a {
    display: flex; align-items: center; gap: 10px;
    padding: 12px 20px; font-size: 14px; font-weight: 600; color: #aab7cc;
    border-left: 3px solid transparent;
}
.sidebar nav a:hover { background: rgba(255,255,255,.04); color: #fff; }
.sidebar nav a.active { background: rgba(30,86,201,.25); border-left-color: var(--accent); color: #fff; }

.main { flex: 1; min-width: 0; }
.topbar {
    background: #fff;
    border-bottom: 1px solid var(--border);
    padding: 16px 28px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.topbar h1 { font-size: 20px; margin: 0; }
.topbar .admin-user { display: flex; align-items: center; gap: 12px; font-size: 14px; }
.content { padding: 28px; }

/* ---- Cards / stats ---- */
.stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; margin-bottom: 26px; }
.stat-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; }
.stat-card .label { color: var(--text-muted); font-size: 13px; font-weight: 600; margin-bottom: 6px; }
.stat-card .value { font-size: 28px; font-weight: 800; }

.panel { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; margin-bottom: 24px; }
.panel-head { display: flex; align-items: center; justify-content: between; justify-content: space-between; margin-bottom: 16px; }
.panel-head h2 { font-size: 17px; margin: 0; }

/* ---- Table ---- */
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 12px 10px; border-bottom: 1px solid var(--border); }
th { color: var(--text-muted); font-weight: 700; font-size: 12px; text-transform: uppercase; letter-spacing: .5px; }
tr:hover td { background: #fafcff; }

/* ---- Badges ---- */
.badge { display: inline-block; padding: 4px 10px; border-radius: 20px; font-size: 12px; font-weight: 700; }
.badge-active, .badge-confirmed, .badge-completed { background: #e5f8f1; color: #0d7a54; }
.badge-inactive, .badge-cancelled { background: #fdecec; color: #b3261e; }
.badge-pending { background: #fff6e0; color: #a5720b; }

/* ---- Buttons ---- */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 6px;
    padding: 10px 18px; border-radius: 8px; font-weight: 700; font-size: 14px;
    border: none; cursor: pointer;
}
.btn-primary { background: var(--gradient); color: #fff; }
.btn-outline { background: #fff; border: 1.5px solid var(--border); color: var(--text); }
.btn-danger { background: #fdecec; color: #b3261e; }
.btn-small { padding: 7px 12px; font-size: 13px; }
.btn-block { width: 100%; }

/* ---- Forms ---- */
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 16px; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-weight: 600; font-size: 14px; margin-bottom: 6px; }
.form-group input, .form-group select, .form-group textarea {
    width: 100%; padding: 11px 13px; border-radius: 8px; border: 1.5px solid var(--border); font-size: 14px; font-family: inherit;
}

.flash { margin-bottom: 18px; padding: 12px 16px; border-radius: 8px; font-weight: 600; font-size: 14px; }
.flash-success { background: #e5f8f1; color: #0d7a54; border: 1px solid #b7ecd8; }
.flash-error { background: #fdecec; color: #b3261e; border: 1px solid #f6c6c3; }

.text-muted { color: var(--text-muted); }
.actions-cell { display: flex; gap: 8px; }

@media (max-width: 900px) {
    .stat-grid { grid-template-columns: repeat(2, 1fr); }
    .form-row { grid-template-columns: 1fr; }
    .sidebar { display: none; }
}