:root {
  --bg: #0f0a1e;
  --surface: #1a1430;
  --surface-2: #221b3d;
  --border: #3d3560;
  --text: #f0ecff;
  --muted: #a89cc8;
  --accent: #7c5cff;
  --accent-dim: #5a3fd4;
  --accent-glow: rgba(124, 92, 255, 0.25);
  --warn: #ffb347;
  --danger: #ff6b8a;
  --ok: #3dd6c3;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: "Inter", "Segoe UI", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.55;
}

.aurora-bg {
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 20% -10%, rgba(124, 92, 255, 0.18), transparent),
    radial-gradient(ellipse 60% 40% at 90% 10%, rgba(61, 214, 195, 0.1), transparent),
    linear-gradient(180deg, #0f0a1e 0%, #120d24 100%);
  pointer-events: none;
  z-index: 0;
}

.layout {
  position: relative;
  z-index: 1;
  max-width: 1000px;
  margin: 0 auto;
  padding: 1.25rem 1.5rem 2.5rem;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  padding: 1rem 0 1.25rem;
  margin-bottom: 1.25rem;
  border-bottom: 1px solid var(--border);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.brand__icon {
  font-size: 1.75rem;
  filter: drop-shadow(0 0 12px var(--accent-glow));
}

.brand__title {
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.brand__sub {
  font-size: 0.78rem;
  color: var(--muted);
  margin-top: 0.1rem;
}

.badge-exam {
  display: inline-block;
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.2rem 0.5rem;
  border-radius: 999px;
  background: var(--accent-glow);
  color: var(--accent);
  border: 1px solid var(--accent-dim);
  margin-left: 0.35rem;
  vertical-align: middle;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.nav a {
  color: var(--muted);
  text-decoration: none;
  padding: 0.42rem 0.8rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 0.82rem;
  transition: border-color 0.15s, color 0.15s;
}

.nav a:hover,
.nav a.is-active {
  color: var(--ok);
  border-color: var(--ok);
  background: rgba(61, 214, 195, 0.08);
}

.card {
  background: linear-gradient(145deg, var(--surface) 0%, var(--surface-2) 100%);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.6rem;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
}

.card__title {
  font-size: 1.45rem;
  font-weight: 800;
  margin-bottom: 0.35rem;
}

.card__sub {
  color: var(--muted);
  margin-bottom: 1.35rem;
  font-size: 0.92rem;
}

.form-label {
  display: block;
  font-size: 0.82rem;
  color: var(--muted);
  margin-bottom: 0.35rem;
  font-weight: 600;
}

.form-input {
  width: 100%;
  padding: 0.7rem 0.9rem;
  margin-bottom: 1rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  font-size: 1rem;
}

.form-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.68rem 1.15rem;
  border-radius: 10px;
  border: none;
  font-size: 0.92rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.1s, filter 0.15s;
}

.btn:active { transform: scale(0.98); }

.btn--primary {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dim) 100%);
  color: #fff;
}

.btn--primary:hover { filter: brightness(1.08); }

.btn--ghost {
  background: transparent;
  color: var(--muted);
  border: 1px solid var(--border);
}

.btn--warn {
  background: transparent;
  color: var(--warn);
  border: 1px solid var(--warn);
}

.error-msg {
  color: var(--danger);
  font-size: 0.9rem;
  margin-top: 0.85rem;
  min-height: 1.3rem;
}

.status-msg {
  margin-top: 1.1rem;
  padding: 0.8rem 1rem;
  border-radius: 10px;
  background: rgba(61, 214, 195, 0.1);
  border: 1px solid rgba(61, 214, 195, 0.35);
  color: var(--ok);
  font-size: 0.9rem;
  min-height: 2.75rem;
}

.welcome {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  color: var(--warn);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 0.5rem;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1rem;
  font-size: 0.88rem;
}

.data-table th,
.data-table td {
  border: 1px solid var(--border);
  padding: 0.7rem 0.8rem;
  text-align: left;
}

.data-table th {
  background: var(--bg);
  color: var(--muted);
  font-weight: 700;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.data-table button {
  padding: 0.38rem 0.7rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  cursor: pointer;
  font-size: 0.78rem;
  margin-right: 0.35rem;
}

.data-table button:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.upload-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  align-items: center;
  margin-top: 1rem;
}

.meta-box {
  margin-top: 1.5rem;
  padding: 0.9rem 1rem;
  border-radius: 10px;
  border: 1px dashed var(--border);
  color: var(--muted);
  font-size: 0.8rem;
}

.meta-box code {
  color: var(--warn);
  font-size: 0.78rem;
}

.footer-note {
  margin-top: 2rem;
  text-align: center;
  color: var(--muted);
  font-size: 0.76rem;
}

.hidden { display: none !important; }