:root {
  --bg: #0b1220;
  --panel: #121b2f;
  --panel-soft: #18233d;
  --line: #263453;
  --text: #e8edf7;
  --muted: #9fb1d1;
  --primary: #4f8cff;
  --primary-strong: #2f6ae7;
  --success: #1eb980;
  --warning: #ffb020;
  --danger: #ff5a74;
  --shadow: 0 18px 40px rgba(0,0,0,.25);
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: linear-gradient(180deg, #08101f, #0c1425 30%, #0e1629 100%);
  color: var(--text);
  font: 14px/1.6 "Inter", "Hiragino Sans", "Yu Gothic UI", sans-serif;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.app-shell { min-height: 100vh; display: grid; grid-template-columns: 280px 1fr; }
.sidebar {
  background: rgba(10,15,28,.82);
  backdrop-filter: blur(16px);
  border-right: 1px solid rgba(255,255,255,.06);
  padding: 24px 20px;
  position: sticky;
  top: 0;
  height: 100vh;
}
.brand { font-size: 20px; font-weight: 800; letter-spacing: .02em; margin-bottom: 28px; }
.user-card, .card {
  background: linear-gradient(180deg, rgba(255,255,255,.04), rgba(255,255,255,.02));
  border: 1px solid rgba(255,255,255,.07);
  border-radius: 20px;
  box-shadow: var(--shadow);
}
.user-card { padding: 16px; margin-bottom: 20px; }
.user-name { font-weight: 700; }
.user-role { color: var(--muted); font-size: 12px; }
.nav { display: grid; gap: 8px; }
.nav a {
  padding: 12px 14px;
  border-radius: 14px;
  color: #d8e3fa;
}
.nav a:hover { background: rgba(255,255,255,.06); }
.main { padding: 28px; }
.main.full { max-width: 1100px; margin: 0 auto; width: 100%; }
.page-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 18px; gap: 16px; }
.page-head h1 { margin: 0; font-size: 28px; letter-spacing: .02em; }
.pill, .badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 5px 10px; border-radius: 999px; font-size: 12px; font-weight: 700;
  background: rgba(79,140,255,.14); color: #cfe0ff; border: 1px solid rgba(79,140,255,.28);
}
.badge.success { background: rgba(30,185,128,.14); color: #c8f5e5; border-color: rgba(30,185,128,.25); }
.badge.warning { background: rgba(255,176,32,.12); color: #ffe2a7; border-color: rgba(255,176,32,.25); }
.badge.danger { background: rgba(255,90,116,.13); color: #ffd6de; border-color: rgba(255,90,116,.25); }
.card { padding: 20px; }
.hero-card { padding: 28px; }
.flash { padding: 14px 16px; border-radius: 14px; margin-bottom: 14px; }
.flash.success { background: rgba(30,185,128,.14); border: 1px solid rgba(30,185,128,.18); }
.flash.error { background: rgba(255,90,116,.13); border: 1px solid rgba(255,90,116,.18); }
.stats-grid, .grid { display: grid; gap: 16px; }
.stats-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); margin-bottom: 20px; }
.grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid.four { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid.compact, .metric-grid { gap: 12px; }
.stat-card {
  background: linear-gradient(180deg, rgba(79,140,255,.18), rgba(255,255,255,.03));
  border: 1px solid rgba(255,255,255,.06);
  border-radius: 18px;
  padding: 18px;
}
.stat-card span { display: block; color: var(--muted); font-size: 13px; }
.stat-card strong { display: block; margin-top: 8px; font-size: 34px; }
.section-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; margin-bottom: 14px; }
.section-head h2, .card h2 { margin: 0 0 6px; font-size: 20px; }
.mini-link { color: #9dc1ff; font-size: 13px; }
.list-item, .link-card {
  display: block; border-radius: 16px; border: 1px solid rgba(255,255,255,.06);
  background: rgba(255,255,255,.02); padding: 14px 16px;
}
.list-item + .list-item, .announcement-item + .announcement-item, .comment-item + .comment-item, .attendance-row + .attendance-row { margin-top: 12px; }
.list-item:hover, .link-card:hover, .photo-card:hover { border-color: rgba(79,140,255,.38); transform: translateY(-1px); }
.link-card { transition: .18s ease; }
.list-item { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.list-item.no-link { cursor: default; }
.muted { color: var(--muted); font-size: 12px; }
.announcement-item p, .comment-item p, .card p { margin: 8px 0 0; }
.metric-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); }
.metric-card {
  padding: 14px;
  border-radius: 16px;
  background: rgba(255,255,255,.03);
  border: 1px solid rgba(255,255,255,.05);
}
.metric-card span { display: block; color: var(--muted); font-size: 12px; }
.metric-card strong { display: block; margin-top: 6px; font-size: 24px; }
.metric-card.compact strong { font-size: 18px; }
.delta { margin-top: 6px; font-size: 12px; font-weight: 700; }
.delta.up { color: #79dfaf; }
.delta.down { color: #ff9baa; }
.btn {
  appearance: none; border: none; cursor: pointer;
  color: white; background: rgba(255,255,255,.08); padding: 11px 16px;
  border-radius: 12px; font-weight: 700;
}
.btn.primary { background: linear-gradient(180deg, var(--primary), var(--primary-strong)); }
.btn.small { padding: 8px 12px; font-size: 12px; }
input, select, textarea {
  width: 100%; margin-top: 6px; background: rgba(255,255,255,.03);
  color: white; border: 1px solid rgba(255,255,255,.12);
  border-radius: 12px; padding: 11px 12px; outline: none;
}
textarea { resize: vertical; }
label { display: block; font-weight: 600; }
.check { display: flex; align-items: center; gap: 10px; margin-top: 30px; }
.check input { width: auto; margin: 0; }
.stack { display: grid; gap: 16px; }
.attendance-row { display: flex; justify-content: space-between; gap: 14px; padding-bottom: 12px; border-bottom: 1px solid rgba(255,255,255,.06); }
.inline-form { display: grid; grid-template-columns: 120px 1fr auto; gap: 8px; align-items: center; }
.photo-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 16px; }
.photo-card { overflow: hidden; border-radius: 18px; border: 1px solid rgba(255,255,255,.08); background: rgba(255,255,255,.03); transition: .18s ease; }
.photo-card img { aspect-ratio: 4 / 3; object-fit: cover; width: 100%; }
.photo-card figcaption, .photo-meta { padding: 12px; }
.table { width: 100%; border-collapse: collapse; }
.table th, .table td { border-bottom: 1px solid rgba(255,255,255,.08); padding: 12px 10px; text-align: left; }
.login-wrap { min-height: 100vh; display: grid; grid-template-columns: 1.2fr .8fr; gap: 24px; align-items: center; }
.login-card { padding: 24px; }
.demo-box { background: rgba(255,255,255,.04); border-radius: 16px; padding: 16px; margin-top: 18px; }
.form-card { margin-bottom: 18px; }
.align-end { display: flex; align-items: end; }
@media (max-width: 1080px) {
  .app-shell { grid-template-columns: 1fr; }
  .sidebar { position: static; height: auto; }
  .stats-grid, .grid.two, .grid.three, .grid.four, .login-wrap { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
  .main { padding: 16px; }
  .page-head { align-items: flex-start; flex-direction: column; }
  .inline-form { grid-template-columns: 1fr; }
  .attendance-row { flex-direction: column; }
}