:root {
  --bg:       #060608;
  --surface:  #0f0f12;
  --card:     #111116;
  --border:   #1e1e28;
  --cyan:     #00cfff;
  --blue:     #2666ff;
  --green:    #20b858;
  --amber:    #c9a84c;
  --ruby:     #e0305a;
  --text:     #ffffff;
  --muted:    #666677;
  --sidebar-w: 220px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
       background: var(--bg); color: var(--text); min-height: 100vh; display: flex; }

/* ── Sidebar ── */
.sidebar {
  width: var(--sidebar-w); min-height: 100vh; background: var(--surface);
  border-right: 1px solid var(--border); display: flex; flex-direction: column;
  position: fixed; top: 0; left: 0; bottom: 0; z-index: 100;
}
.sidebar-brand {
  padding: 20px 18px 16px; border-bottom: 1px solid var(--border);
}
.sidebar-brand h1 { font-size: 13px; font-weight: 800; letter-spacing: 2px;
  text-transform: uppercase;
  background: linear-gradient(90deg, var(--cyan), var(--blue));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.sidebar-brand p { font-size: 10px; color: var(--muted); margin-top: 2px; }
.nav-section { padding: 14px 0 4px; }
.nav-label { font-size: 9px; font-weight: 700; letter-spacing: 2px;
  text-transform: uppercase; color: var(--muted); padding: 0 18px; margin-bottom: 4px; }
.nav-item { display: flex; align-items: center; gap: 10px;
  padding: 9px 18px; font-size: 13px; color: #aaaacc; text-decoration: none;
  transition: background 0.15s, color 0.15s; cursor: pointer; }
.nav-item:hover { background: rgba(255,255,255,0.04); color: var(--text); }
.nav-item.active { background: rgba(0,207,255,0.08); color: var(--cyan);
  border-right: 2px solid var(--cyan); }
.nav-icon { font-size: 15px; width: 18px; text-align: center; }
.sidebar-footer { margin-top: auto; padding: 14px 18px;
  border-top: 1px solid var(--border); }
.sidebar-user { font-size: 11px; color: var(--muted); margin-bottom: 8px; }
.sidebar-user strong { color: var(--text); display: block; font-size: 12px; }
.btn-logout { width: 100%; padding: 7px; background: transparent;
  border: 1px solid var(--border); border-radius: 6px; color: var(--muted);
  font-size: 11px; cursor: pointer; transition: all 0.15s; }
.btn-logout:hover { border-color: var(--ruby); color: var(--ruby); }

/* ── Main ── */
.main { margin-left: var(--sidebar-w); flex: 1; display: flex; flex-direction: column; }
.topbar { height: 52px; background: var(--surface);
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; padding: 0 24px;
  position: sticky; top: 0; z-index: 50; }
.topbar-title { font-size: 15px; font-weight: 600; }
.topbar-actions { margin-left: auto; display: flex; gap: 10px; align-items: center; }
.content { padding: 24px; flex: 1; }

/* ── Cards ── */
.card { background: var(--card); border: 1px solid var(--border);
  border-radius: 10px; padding: 20px; margin-bottom: 20px; }
.card-title { font-size: 11px; font-weight: 700; text-transform: uppercase;
  letter-spacing: 2px; color: var(--muted); margin-bottom: 16px; }

/* ── Stat cards ── */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 14px; margin-bottom: 24px; }
.stat-card { background: var(--card); border: 1px solid var(--border);
  border-radius: 10px; padding: 16px; }
.stat-label { font-size: 10px; color: var(--muted); margin-bottom: 6px; }
.stat-value { font-size: 28px; font-weight: 800; }
.stat-value.cyan  { color: var(--cyan); }
.stat-value.green { color: var(--green); }
.stat-value.amber { color: var(--amber); }
.stat-value.blue  { color: var(--blue); }

/* ── Table ── */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th { font-size: 9px; font-weight: 700; letter-spacing: 1.5px;
  text-transform: uppercase; color: var(--muted);
  padding: 10px 14px; border-bottom: 1px solid var(--border);
  text-align: left; white-space: nowrap; }
td { padding: 11px 14px; border-bottom: 1px solid #12121a; vertical-align: middle; }
tr:last-child td { border-bottom: none; }
tr:hover td { background: rgba(255,255,255,0.02); }

/* ── Badges ── */
.badge { display: inline-block; padding: 2px 8px; border-radius: 4px;
  font-size: 9px; font-weight: 700; letter-spacing: 0.5px; }
.badge-green { background: rgba(32,184,88,0.15); color: var(--green); }
.badge-muted { background: rgba(100,100,120,0.2);  color: var(--muted); }
.badge-red   { background: rgba(224,48,90,0.15);   color: var(--ruby); }
.badge-blue  { background: rgba(38,102,255,0.15);  color: var(--blue); }
.badge-amber { background: rgba(201,168,76,0.15);  color: var(--amber); }
.badge-cyan  { background: rgba(0,207,255,0.12);   color: var(--cyan); }

/* ── Buttons ── */
.btn { display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 16px; border-radius: 7px; font-size: 12px; font-weight: 600;
  cursor: pointer; text-decoration: none; border: none; transition: opacity 0.15s; }
.btn:hover { opacity: 0.85; }
.btn-primary { background: linear-gradient(90deg, var(--cyan), var(--blue)); color: #fff; }
.btn-outline { background: transparent; border: 1px solid var(--border);
  color: var(--text); }
.btn-danger  { background: rgba(224,48,90,0.15); border: 1px solid rgba(224,48,90,0.3);
  color: var(--ruby); }
.btn-sm { padding: 5px 10px; font-size: 11px; }

/* ── Forms ── */
.form-group { margin-bottom: 16px; }
label { display: block; font-size: 11px; font-weight: 600; color: var(--muted);
  margin-bottom: 6px; letter-spacing: 0.5px; }
input[type="text"], input[type="email"], input[type="password"],
input[type="date"], input[type="time"], input[type="color"],
select, textarea {
  width: 100%; padding: 9px 12px; background: #0c0c14;
  border: 1px solid var(--border); border-radius: 7px;
  color: var(--text); font-size: 13px; outline: none; transition: border 0.15s; }
input:focus, select:focus, textarea:focus { border-color: var(--blue); }
textarea { resize: vertical; min-height: 80px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-actions { display: flex; gap: 10px; margin-top: 20px; }

/* ── Login page ── */
.login-wrap { min-height: 100vh; display: flex; align-items: center;
  justify-content: center; background: var(--bg); }
.login-card { width: 100%; max-width: 380px; padding: 36px;
  background: var(--card); border: 1px solid var(--border); border-radius: 14px; }
.login-logo { text-align: center; margin-bottom: 28px; }
.login-logo h1 { font-size: 18px; font-weight: 800; letter-spacing: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--blue));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.login-logo p { font-size: 11px; color: var(--muted); margin-top: 4px; }
.login-error { background: rgba(224,48,90,0.12); border: 1px solid rgba(224,48,90,0.3);
  color: var(--ruby); border-radius: 7px; padding: 10px 14px;
  font-size: 12px; margin-bottom: 16px; }
.login-btn { width: 100%; padding: 11px;
  background: linear-gradient(90deg, var(--cyan), var(--blue));
  border: none; border-radius: 7px; color: #fff;
  font-size: 13px; font-weight: 700; cursor: pointer;
  transition: opacity 0.15s; margin-top: 8px; }
.login-btn:hover { opacity: 0.88; }

/* ── Alerts ── */
.alert { padding: 12px 16px; border-radius: 8px; margin-bottom: 16px; font-size: 13px; }
.alert-info    { background: rgba(0,207,255,0.08);  border: 1px solid rgba(0,207,255,0.2);  color: var(--cyan); }
.alert-success { background: rgba(32,184,88,0.08);  border: 1px solid rgba(32,184,88,0.2);  color: var(--green); }

/* ── Announcement form ── */
.announce-card { background: var(--card); border: 1px solid var(--border); border-radius: 10px; padding: 20px; }

/* ── Responsive ── */
@media (max-width: 700px) {
  .sidebar { transform: translateX(-100%); }
  .main { margin-left: 0; }
  .form-row { grid-template-columns: 1fr; }
}