:root {
  --bg: #f4f7fb;
  --card: #ffffff;
  --text: #1e293b;
  --muted: #64748b;
  --accent: #2c5aa0;
  --success: #166534;
  --error: #991b1b;
  --border: #dbe3ef;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
}
.container { max-width: 900px; margin: 0 auto; padding: 0 1rem; }
.topbar { background: var(--card); border-bottom: 1px solid var(--border); }
.topbar-inner { display: flex; justify-content: space-between; align-items: center; min-height: 64px; }
.topbar a { color: var(--accent); text-decoration: none; margin-left: 1rem; }
.brand { font-weight: 700; margin-left: 0 !important; }
.content { padding-top: 1.5rem; padding-bottom: 3rem; }
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 1.25rem;
  margin-bottom: 1rem;
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.05);
}
.hero h1 { margin-top: 0; }
.button-row { display: flex; gap: .75rem; flex-wrap: wrap; margin-top: 1rem; }
.button {
  display: inline-block;
  background: var(--accent);
  color: white;
  border: 0;
  border-radius: 12px;
  padding: .8rem 1rem;
  text-decoration: none;
  cursor: pointer;
  font-weight: 600;
}
.button.secondary { background: #e7eef9; color: var(--accent); }
label { display: block; margin-bottom: 1rem; font-weight: 600; }
input {
  display: block;
  width: 100%;
  margin-top: .4rem;
  padding: .8rem .9rem;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: white;
}
.form-card { max-width: 520px; margin-left: auto; margin-right: auto; }
.profile-head { display: flex; gap: 1rem; align-items: center; flex-wrap: wrap; }
.selfie {
  width: 120px;
  height: 120px;
  object-fit: cover;
  border-radius: 16px;
  border: 3px solid #edf2fa;
}
.selfie-center { display: block; margin: 0 auto 1rem; }
.qr { display: block; width: min(100%, 340px); margin: 1rem auto 0; border-radius: 18px; background: white; padding: .75rem; }
.attendance-list { list-style: none; padding: 0; margin: 0; }
.attendance-list li {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: .85rem 0;
  border-bottom: 1px solid var(--border);
}
.table { width: 100%; border-collapse: collapse; }
.table th, .table td { text-align: left; padding: .75rem .5rem; border-bottom: 1px solid var(--border); }
.flash {
  padding: .85rem 1rem;
  border-radius: 12px;
  margin-bottom: 1rem;
}
.flash.success { background: #ecfdf5; color: var(--success); }
.flash.error { background: #fef2f2; color: var(--error); }
code {
  background: #f1f5f9;
  padding: .2rem .4rem;
  border-radius: 8px;
}
@media (max-width: 640px) {
  .attendance-list li { flex-direction: column; }
}