:root {
    --primary: #4f46e5;        /* indigo */
    --primary-dark: #4338ca;
    --primary-soft: #eef2ff;
    --header: #0f172a;         /* slate */
    --bg: #f1f5f9;
    --card-bg: #ffffff;
    --text: #1e293b;
    --muted: #64748b;
    --border: #e2e8f0;
    --success: #15803d;
    --danger: #dc2626;
    --warning: #c2410c;
    --shadow: 0 1px 2px rgba(15, 23, 42, 0.04), 0 4px 12px rgba(15, 23, 42, 0.06);
    --font: 'Inter', 'Segoe UI', Arial, sans-serif;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
}

/* header and nav */
.admin-header {
    background: var(--header);
    color: white;
    padding: 0.85rem 1.5rem;
    border-bottom: 3px solid var(--primary);
}

.header-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.brand {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.01em;
    color: white;
    text-decoration: none;
}

.brand span {
    background: var(--primary);
    border-radius: 6px;
    padding: 0.1rem 0.5rem;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    margin-left: 0.3rem;
    vertical-align: middle;
}

.admin-nav ul {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
    margin: 0;
    padding: 0;
}

.admin-nav a {
    color: #cbd5e1;
    text-decoration: none;
    font-weight: 500;
    padding: 0.45rem 0.9rem;
    border-radius: 8px;
    display: block;
}

.admin-nav a:hover { color: white; background: rgba(255,255,255,0.08); }
.admin-nav a.active { color: white; background: var(--primary); }

main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.5rem;
}

footer {
    text-align: center;
    padding: 1.5rem;
    color: var(--muted);
    font-size: 0.85rem;
}

.page-heading {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 1.25rem;
}

.page-heading h1 { margin: 0; font-size: 1.65rem; font-weight: 700; letter-spacing: -0.02em; }
.subtitle { margin: 0.2rem 0 0; color: var(--muted); }
.muted { color: var(--muted); font-size: 0.85rem; }

.panel {
    background: var(--card-bg);
    border-radius: 12px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.panel h2 { margin-top: 0; font-size: 1.2rem; }

/* Buttons */
.btn, button {
    display: inline-block;
    cursor: pointer;
    border: none;
    border-radius: 8px;
    padding: 0.55rem 1.15rem;
    font-size: 0.92rem;
    font-weight: 600;
    font-family: inherit;
    transition: background 0.15s ease, color 0.15s ease;
    text-decoration: none;
    text-align: center;
    white-space: nowrap;
}
.btn-primary { background: var(--primary); color: white; box-shadow: 0 2px 6px rgba(79, 70, 229, 0.25); }
.btn-primary:hover { background: var(--primary-dark); }
.btn-secondary { background: #e2e8f0; color: var(--text); }
.btn-secondary:hover { background: #cbd5e1; }
.btn-danger { background: #fef2f2; color: var(--danger); border: 1px solid #fecaca; }
.btn-danger:hover { background: var(--danger); color: white; }
.btn-small { padding: 0.3rem 0.7rem; font-size: 0.85rem; }
button:disabled { opacity: 0.6; cursor: not-allowed; }

.table-wrapper { overflow-x: auto; }

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.92rem;
}
.data-table th, .data-table td {
    text-align: left;
    padding: 0.65rem 0.8rem;
    border-bottom: 1px solid var(--border);
    vertical-align: middle;
}
.data-table th {
    background: #f8fafc;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--muted);
}
.data-table tr:hover td { background: #f8faff; }
.data-table td.actions { white-space: nowrap; }
.data-table td.actions .btn { margin-right: 0.3rem; }

.empty-state { text-align: center; color: var(--muted); padding: 1.5rem; }

.badge {
    display: inline-block;
    padding: 0.15rem 0.6rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
}
.badge.status-upcoming { background: #dcfce7; color: var(--success); }
.badge.status-past { background: #e2e8f0; color: var(--muted); }
.badge.status-suspended { background: #ffedd5; color: var(--warning); }

/* Forms */
.form-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem 1.25rem;
}
.form-grid .span-2, .form-section { grid-column: 1 / -1; }
.form-section {
    margin: 0.75rem 0 0;
    font-size: 1rem;
    font-weight: 600;
    color: var(--primary);
    border-bottom: 1px solid var(--border);
    padding-bottom: 0.4rem;
}
.form-section:first-child { margin-top: 0; }

.form-group { display: flex; flex-direction: column; gap: 0.35rem; }
.form-group label {
    font-weight: 600;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--muted);
}

input[type="text"], input[type="search"], input[type="number"], input[type="date"],
input[type="time"], input[type="url"], select, textarea {
    padding: 0.6rem 0.8rem;
    border: 1px solid #cbd5e1;
    border-radius: 8px;
    font-family: inherit;
    font-size: 0.95rem;
    background: #ffffff;
    color: var(--text);
}
input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.18);
}
input:disabled { background: var(--bg); color: var(--muted); }

.checkbox-group { justify-content: flex-end; }
.checkbox-group label {
    text-transform: none;
    letter-spacing: 0;
    font-size: 0.95rem;
    color: var(--text);
    font-weight: 500;
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.form-actions {
    display: flex;
    justify-content: flex-end;
    gap: 0.6rem;
    border-top: 1px solid var(--border);
    padding-top: 1rem;
}

.inline-form {
    display: flex;
    align-items: flex-end;
    gap: 1rem;
    flex-wrap: wrap;
}
.inline-form .form-group { flex: 1; min-width: 220px; }

@media (max-width: 700px) {
    .form-grid { grid-template-columns: 1fr; }
    main { padding: 1rem; }
}