:root {
  --bg: #f8f2f2;
  --card: #ffffff;
  --text: #183153;
  --muted: #6b7a90;
  --border: #ecd6d5;
  --primary: #cf1b15;
  --primary-dark: #a81712;
  --success: #27a05d;
  --danger: #d74b4b;
  --warning: #7a8ca8;
  --waitlist: #bf8b16;
  --shadow: 0 12px 28px rgba(24,49,83,.08);
  --radius: 18px;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: linear-gradient(180deg, #f7e7e6 0, var(--bg) 220px);
  color: var(--text);
  font-family: Inter, Arial, sans-serif;
}
.sidebar {
  position: fixed;
  inset: 0 auto 0 0;
  width: 240px;
  background: linear-gradient(180deg, #7e1512 0%, #cf1b15 100%);
  color: #fff;
  padding: 28px 20px;
  overflow: hidden;
}
.sidebar::before {
  content: "";
  position: absolute;
  inset: -70px -90px auto auto;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: rgba(255,255,255,.08);
}
.sidebar::after {
  content: "";
  position: absolute;
  inset: auto auto 40px -70px;
  width: 160px;
  height: 160px;
  border-radius: 50%;
  background: rgba(0,0,0,.08);
}
.brand { font-size: 28px; font-weight: 800; margin-bottom: 28px; }
.brand small { display:block; font-size:14px; opacity:.8; margin-top:8px; font-weight:500; }
.brand-logo-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 18px;
  padding: 14px 12px;
  margin-bottom: 14px;
  position: relative;
  z-index: 1;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.12), 0 12px 24px rgba(0,0,0,.12);
}
.brand-logo {
  display: block;
  width: 100%;
  max-width: 190px;
  height: auto;
  filter: drop-shadow(0 6px 12px rgba(0,0,0,.14));
}
.brand-label {
  display: block;
  text-align: center;
  font-size: 13px;
  opacity: .82;
  letter-spacing: .04em;
  text-transform: uppercase;
  margin-top: 8px;
  position: relative;
  z-index: 1;
}
.nav { position: relative; z-index: 1; }
.nav a {
  display:block; color:#e8f0ff; text-decoration:none; padding:14px 16px; border-radius:14px; margin-bottom:10px; font-weight:700; border:1px solid transparent;
}
.nav a.active, .nav a:hover { background: rgba(255,255,255,.18); border-color: rgba(255,255,255,.14); transform: translateX(2px); }
.main { margin-left: 240px; padding: 30px; }
.topbar { display:flex; justify-content:space-between; align-items:center; gap:20px; margin-bottom:24px; }
.topbar h1 { margin:0; font-size:34px; }
.topbar p { margin:6px 0 0; color:var(--muted); }
.actions { display:flex; gap:12px; flex-wrap:wrap; }
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.panel { padding: 22px; }
.kpi-grid { display:grid; grid-template-columns: repeat(4, minmax(180px,1fr)); gap:18px; margin-bottom:22px; }
.kpi { color:#fff; padding:22px; border-radius:18px; }
.kpi.success { background: linear-gradient(135deg, #31b86d, #248b53); }
.kpi.danger { background: linear-gradient(135deg, #ee6262, #c54040); }
.kpi.warning { background: linear-gradient(135deg, #8798b4, #697994); }
.kpi.waitlist { background: linear-gradient(135deg, #d7ab38, #af7f0b); }
.kpi .label { opacity:.92; font-weight:700; letter-spacing:.03em; }
.kpi .value { font-size:42px; font-weight:800; margin-top:8px; }
.filters { display:grid; grid-template-columns: 1.5fr 180px 180px auto; gap:14px; align-items:end; }
.field {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 12px;
  transition: border-color .2s ease, box-shadow .2s ease, transform .2s ease;
}
.field:hover {
  border-color: var(--primary);
}
.field:focus-within {
  border-color: var(--primary);
  box-shadow: var(--shadow);
  transform: translateY(-1px);
}
.field label {
  display:block;
  font-size:12px;
  font-weight:800;
  margin-bottom:8px;
  letter-spacing:.04em;
  text-transform: uppercase;
  color:var(--muted);
}
.input, select, textarea {
  width:100%;
  border:1px solid var(--border);
  border-radius:12px;
  background:#fff;
  padding:13px 14px;
  font-size:15px;
  color:var(--text);
  transition: border-color .2s ease, box-shadow .2s ease, background-color .2s ease;
}
.input::placeholder,
textarea::placeholder {
  color: var(--muted);
}
.input:hover, select:hover, textarea:hover {
  border-color: var(--primary);
}
.input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 2px var(--primary);
}
select {
  appearance: none;
  background-image: linear-gradient(45deg, transparent 50%, var(--muted) 50%), linear-gradient(135deg, var(--muted) 50%, transparent 50%);
  background-position: calc(100% - 20px) calc(50% - 2px), calc(100% - 14px) calc(50% - 2px);
  background-size: 6px 6px, 6px 6px;
  background-repeat: no-repeat;
  padding-right: 36px;
}
textarea {
  min-height:180px;
  resize:vertical;
  line-height: 1.5;
}
input[type="datetime-local"] {
  font-variant-numeric: tabular-nums;
}
input[type="number"] {
  text-align: left;
}
.button {
  display:inline-flex; align-items:center; justify-content:center; gap:8px; border:none; border-radius:14px; padding:14px 18px; font-size:16px; font-weight:800; text-decoration:none; cursor:pointer;
  transition: transform .18s ease, box-shadow .18s ease, background-color .18s ease, border-color .18s ease;
  box-shadow: var(--shadow);
}
.button.primary { background: var(--primary); color:#fff; }
.button.primary:hover { background: var(--primary-dark); transform: translateY(-1px); box-shadow: var(--shadow); }
.button.secondary { background:#fff; border:1px solid var(--border); color:var(--text); }
.button.secondary:hover { border-color: var(--primary); transform: translateY(-1px); box-shadow: var(--shadow); }
.button.success { background: var(--success); color:#fff; }
.button.success:hover { transform: translateY(-1px); box-shadow: var(--shadow); }
.button.warn { background: var(--waitlist); color:#fff; }
.button.warn:hover { transform: translateY(-1px); box-shadow: var(--shadow); }
.button:active { transform: translateY(0); box-shadow: var(--shadow); }
.tag { display:inline-block; padding:8px 12px; border-radius:999px; font-weight:800; font-size:13px; }
.tag.success { background:#e8f7ef; color:var(--success); }
.tag.danger { background:#fdecec; color:var(--danger); }
.tag.warning { background:#eef2f7; color:#61758f; }
.tag.waitlist { background:#fff3d6; color:#9a6e05; }
.year-group { margin-top:28px; }
.year-header { font-size:24px; font-weight:800; margin:0 0 14px; }
.events-grid { display:grid; grid-template-columns: repeat(3, minmax(260px,1fr)); gap:18px; }
.event-card { overflow:hidden; }
.event-card .cover { height:8px; background: linear-gradient(90deg, #cf1b15, #f06b55); }
.event-card .content { padding:20px; }
.event-card h3 { margin:0 0 8px; font-size:24px; }
.meta { color:var(--muted); margin-bottom:14px; }
.stats-row { display:flex; gap:10px; flex-wrap:wrap; margin-bottom:14px; }
.toolbar { display:flex; justify-content:space-between; gap:16px; align-items:center; margin-bottom:16px; }
.table-wrap { overflow:auto; }
.table { width:100%; border-collapse:collapse; }
.table th, .table td { padding:15px 14px; border-bottom:1px solid var(--border); text-align:left; }
.table th {
  color:var(--muted);
  font-size:14px;
  text-transform:uppercase;
  letter-spacing:.03em;
  background: var(--bg);
  position: sticky;
  top: 0;
  z-index: 1;
}
.table tbody tr {
  transition: background-color .15s ease;
}
.table tbody tr:nth-child(even) {
  background: var(--card);
}
.table tbody tr:hover {
  background: var(--bg);
}
.table td {
  vertical-align: middle;
}
.notice { padding:14px 16px; border-radius:14px; margin-bottom:16px; font-weight:700; }
.notice.ok { background:#e8f7ef; color:#226b44; }
.notice.error { background:#fdecec; color:#9c3131; }
.split { display:grid; grid-template-columns: 1.5fr .9fr; gap:18px; }
.info-list { display:grid; grid-template-columns: repeat(2, minmax(180px,1fr)); gap:14px; }
.info-box { background:#fff7f6; border:1px solid var(--border); border-radius:16px; padding:16px; }
.panel form,
form.panel {
  display: grid;
  gap: 14px;
}
form.panel .split {
  align-items: start;
}
form.panel .actions {
  padding-top: 8px;
  border-top: 1px solid var(--border);
}
.small { font-size:14px; color:var(--muted); }
.progress-track {
  width: 100%;
  height: 12px;
  border-radius: 999px;
  background: #e8eef7;
  overflow: hidden;
  border: 1px solid var(--border);
}
.progress-bar {
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, #f06b55, #cf1b15);
  transition: width .25s ease;
}
.empty { padding:28px; text-align:center; color:var(--muted); }
@media (max-width: 1200px) {
  .events-grid { grid-template-columns: repeat(2, minmax(260px,1fr)); }
  .kpi-grid { grid-template-columns: repeat(2, minmax(180px,1fr)); }
  .filters { grid-template-columns: 1fr 1fr; }
  .split { grid-template-columns: 1fr; }
}
@media (max-width: 820px) {
  .sidebar { position: static; width: auto; }
  .main { margin-left: 0; padding: 18px; }
  .brand-logo { max-width: 210px; }
  .topbar { flex-direction:column; align-items:flex-start; }
  .events-grid, .kpi-grid, .filters, .info-list { grid-template-columns: 1fr; }
}