:root {
  --bg0: #0b1220;
  --bg1: #121c2e;
  --bg2: #1a2740;
  --surface: rgba(255, 255, 255, 0.04);
  --line: rgba(255, 255, 255, 0.1);
  --text: #eef3fb;
  --muted: #9aacc4;
  --accent: #ff5a3c;
  --accent-2: #2fd4a3;
  --warn: #f0b429;
  --danger: #ff5a6a;
  --ok: #2fd4a3;
  --shadow: 0 20px 50px rgba(0, 0, 0, 0.35);
  --radius: 18px;
  --font-display: "Syne", sans-serif;
  --font-body: "Manrope", sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  min-height: 100vh;
  font-family: var(--font-body);
  color: var(--text);
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(47, 212, 163, 0.18), transparent 55%),
    radial-gradient(900px 500px at 100% 0%, rgba(255, 90, 60, 0.16), transparent 50%),
    linear-gradient(160deg, var(--bg0), var(--bg1) 45%, #0e1830);
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.app-shell { display: grid; grid-template-columns: 250px 1fr; min-height: 100vh; }
.sidebar {
  padding: 1.4rem 1rem;
  background: rgba(8, 14, 26, 0.72);
  border-right: 1px solid var(--line);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}
.brand {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.03em;
  font-size: 1.45rem;
  margin: 0.2rem 0 1.4rem;
}
.brand span { color: var(--accent); }
.nav a {
  display: flex;
  align-items: center;
  gap: .6rem;
  padding: .7rem .85rem;
  border-radius: 12px;
  color: var(--muted);
  margin-bottom: .25rem;
  transition: .2s ease;
}
.nav a:hover, .nav a.active {
  background: rgba(255, 90, 60, 0.12);
  color: var(--text);
}
.badge {
  margin-left: auto;
  background: var(--accent);
  color: white;
  border-radius: 999px;
  font-size: .72rem;
  padding: .1rem .45rem;
  min-width: 1.2rem;
  text-align: center;
}

.content { padding: 1.4rem 1.6rem 2.5rem; }
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.2rem;
}
.topbar h1 {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 2vw, 2rem);
  margin: 0;
  letter-spacing: -0.03em;
}
.muted { color: var(--muted); }
.grid { display: grid; gap: 1rem; }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
  box-shadow: var(--shadow);
}
.stat strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.7rem;
  margin-top: .35rem;
}

.btn, button, input[type=submit] {
  appearance: none;
  border: 0;
  border-radius: 12px;
  padding: .72rem 1rem;
  font-family: var(--font-body);
  font-weight: 700;
  cursor: pointer;
  background: linear-gradient(135deg, var(--accent), #ff7a3c);
  color: white;
}
.btn.secondary, button.secondary {
  background: transparent;
  border: 1px solid var(--line);
  color: var(--text);
}
.btn.ghost { background: rgba(255,255,255,.06); }
.btn:disabled { opacity: .5; cursor: not-allowed; }

input, select, textarea {
  width: 100%;
  background: rgba(0,0,0,.25);
  border: 1px solid var(--line);
  color: var(--text);
  border-radius: 12px;
  padding: .75rem .85rem;
  font: inherit;
}
label { display: block; margin: .55rem 0 .3rem; color: var(--muted); font-size: .9rem; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: .8rem; }

.table { width: 100%; border-collapse: collapse; }
.table th, .table td {
  text-align: left;
  padding: .7rem .4rem;
  border-bottom: 1px solid var(--line);
  vertical-align: middle;
}
.table th { color: var(--muted); font-weight: 600; font-size: .85rem; }

.avatar, .avatar-lg {
  width: 42px; height: 42px; border-radius: 14px; object-fit: cover;
  background: var(--bg2); border: 1px solid var(--line);
}
.avatar-lg { width: 96px; height: 96px; border-radius: 22px; }
.avatar.placeholder, .avatar-lg.placeholder {
  display: inline-flex; align-items: center; justify-content: center;
  font-family: var(--font-display); font-weight: 800; color: var(--accent-2);
}

.pill {
  display: inline-flex; align-items: center; gap: .35rem;
  border-radius: 999px; padding: .2rem .55rem; font-size: .78rem; font-weight: 700;
  background: rgba(255,255,255,.08);
}
.pill.ok { background: rgba(47,212,163,.15); color: var(--ok); }
.pill.warn { background: rgba(240,180,41,.15); color: var(--warn); }
.pill.danger { background: rgba(255,90,106,.15); color: var(--danger); }

.flash-wrap { display: grid; gap: .5rem; margin-bottom: 1rem; }
.flash {
  padding: .8rem 1rem; border-radius: 12px; border: 1px solid var(--line);
  background: rgba(255,255,255,.05);
}
.flash.success { border-color: rgba(47,212,163,.4); }
.flash.warning { border-color: rgba(240,180,41,.45); }
.flash.error { border-color: rgba(255,90,106,.45); }

.card-number {
  font-family: var(--font-display);
  letter-spacing: .08em;
  color: var(--accent-2);
}

.checkin-hero {
  display: grid;
  grid-template-columns: 1.2fr .8fr;
  gap: 1rem;
  margin-bottom: 1rem;
}
.checkin-input {
  font-size: 1.35rem;
  letter-spacing: .06em;
  padding: 1.1rem 1rem;
}

.login-page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 1.5rem;
}
.login-card {
  width: min(420px, 100%);
  padding: 2rem;
  border-radius: 24px;
  background: rgba(10, 16, 30, 0.8);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}
.login-card h1 {
  font-family: var(--font-display);
  margin: 0 0 .3rem;
}
.login-card .btn { width: 100%; margin-top: 1rem; }

@media (max-width: 960px) {
  .app-shell { grid-template-columns: 1fr; }
  .sidebar { position: relative; height: auto; }
  .grid-2, .grid-3, .grid-4, .checkin-hero, .form-row { grid-template-columns: 1fr; }
}