:root {
  color-scheme: light;
  --app-bg: #f5f8f6;
  --app-surface: #ffffff;
  --app-soft: #edf7f2;
  --app-border: #dfe9e4;
  --app-text: #16241d;
  --app-muted: #68776f;
  --app-primary: #198754;
  --app-danger: #dc3545;
  --app-shadow: 0 18px 48px rgba(19, 72, 46, 0.1);
  font-family: "Pretendard", "Apple SD Gothic Neo", "Noto Sans KR", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
}

body {
  min-height: 100vh;
  background: var(--app-bg);
  color: var(--app-text);
}

[hidden] {
  display: none !important;
}

.section-kicker {
  display: block;
  margin-bottom: 0.45rem;
  color: var(--app-primary);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.auth-card {
  width: min(100%, 420px);
  max-width: 420px;
}

.small-note {
  margin: 18px 0 0;
  color: var(--app-muted);
  font-size: 0.9rem;
}

.toast-root {
  position: fixed;
  top: 16px;
  left: 50%;
  z-index: 1080;
  display: grid;
  gap: 8px;
  transform: translateX(-50%);
}

.fallback-toast {
  min-width: min(88vw, 340px);
  padding: 12px 16px;
  border-radius: 8px;
  background: var(--app-primary);
  color: #fff;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.12);
}

.fallback-toast.error {
  background: var(--app-danger);
}

/* Public attendance page */
.attendance-body {
  background:
    linear-gradient(135deg, rgba(25, 135, 84, 0.11), rgba(255, 255, 255, 0) 38%),
    var(--app-bg);
}

.attendance-shell {
  width: min(100% - 32px, 1040px);
  min-height: 100vh;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, 440px);
  align-items: center;
  gap: 28px;
  padding: 32px 0;
}

.attendance-hero,
.attendance-card {
  border: 1px solid var(--app-border);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.92);
  box-shadow: var(--app-shadow);
}

.attendance-hero {
  min-height: 420px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: clamp(28px, 5vw, 48px);
  background:
    linear-gradient(160deg, rgba(25, 135, 84, 0.13), rgba(255, 255, 255, 0.92)),
    #fff;
}

.attendance-hero h1 {
  margin: 0 0 12px;
  font-size: clamp(2rem, 5vw, 3.4rem);
  font-weight: 900;
}

.attendance-hero p {
  max-width: 520px;
  margin: 0;
  color: var(--app-muted);
  font-size: 1.05rem;
}

.attendance-clock {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  width: fit-content;
  padding: 12px 14px;
  border: 1px solid var(--app-border);
  border-radius: 8px;
  background: #fff;
  color: var(--app-muted);
  font-weight: 700;
}

.attendance-card {
  padding: clamp(22px, 4vw, 32px);
}

.attendance-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 24px;
}

.attendance-card-header h2 {
  margin: 0;
  font-size: 1.55rem;
  font-weight: 850;
}

.icon-round {
  width: 42px;
  height: 42px;
  display: inline-grid;
  place-items: center;
  border-radius: 50%;
}

.student-chip {
  display: grid;
  gap: 6px;
  padding: 22px;
  margin-bottom: 18px;
  border: 1px solid var(--app-border);
  border-radius: 8px;
  background: var(--app-soft);
}

.student-chip span {
  color: var(--app-muted);
  font-size: 0.88rem;
  font-weight: 700;
}

.student-chip strong {
  font-size: 1.55rem;
}

.attendance-submit {
  min-height: 58px;
}

.result-card {
  opacity: 0;
  transform: translateY(8px) scale(0.98);
  animation: resultShow 0.28s ease forwards;
}

.result-icon {
  width: 64px;
  height: 64px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--bs-success-bg-subtle);
  color: var(--app-primary);
  font-size: 2rem;
  font-weight: 800;
  animation: resultPulse 0.55s ease;
}

.result-card.duplicate .result-icon {
  background: var(--bs-warning-bg-subtle);
  color: var(--bs-warning-text-emphasis);
}

.result-card.error .result-icon {
  background: var(--bs-danger-bg-subtle);
  color: var(--app-danger);
}

.info-list {
  display: grid;
  gap: 0;
  margin: 0;
}

.info-list div {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--bs-border-color);
}

.info-list div:last-child {
  border-bottom: 0;
}

.info-list dt {
  color: var(--bs-secondary-color);
  font-weight: 700;
}

.info-list dd {
  margin: 0;
  word-break: break-word;
}

/* Admin */
.admin-layout {
  min-height: 100vh;
  display: flex;
}

.admin-sidebar {
  position: sticky;
  top: 0;
  width: 280px;
  height: 100vh;
  flex: 0 0 280px;
  flex-direction: column;
  justify-content: space-between;
  padding: 24px;
  border-right: 1px solid var(--app-border);
  background: #fff;
}

.admin-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 28px;
  color: var(--app-text);
  font-weight: 850;
  text-decoration: none;
}

.admin-brand-mark {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  background: var(--app-primary);
  color: #fff;
}

.admin-menu {
  display: grid;
  gap: 8px;
}

.admin-menu-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  border-radius: 8px;
  color: var(--app-muted);
  font-weight: 750;
  text-decoration: none;
}

.admin-menu-link:hover,
.admin-menu-link.is-active {
  background: var(--app-soft);
  color: var(--app-primary);
}

.admin-content {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: 32px;
}

.admin-page-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 22px;
}

.admin-page-header h1 {
  margin: 0 0 6px;
  font-size: clamp(1.6rem, 3vw, 2.15rem);
  font-weight: 850;
}

.admin-page-header p {
  margin: 0;
  color: var(--app-muted);
}

.admin-card,
.stat-card {
  border: 1px solid var(--app-border);
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 12px 32px rgba(24, 61, 42, 0.06);
}

.admin-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 20px;
  border-bottom: 1px solid var(--app-border);
}

.form-card {
  max-width: 680px;
  padding: 24px;
}

.date-filter-card {
  min-width: min(100%, 360px);
  padding: 16px;
  border: 1px solid var(--app-border);
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 12px 32px rgba(24, 61, 42, 0.06);
}

.admin-table {
  --bs-table-bg: transparent;
}

.admin-table thead th {
  padding: 14px 18px;
  border-bottom: 1px solid var(--app-border);
  background: #f8fbf9;
  color: #52635a;
  font-size: 0.88rem;
  font-weight: 800;
}

.admin-table tbody td {
  padding: 16px 18px;
  border-color: #edf2ef;
}

.admin-table tbody tr:hover {
  background: #fbfdfc;
}

.empty-table-state {
  display: grid;
  justify-items: center;
  gap: 8px;
}

.empty-table-icon {
  min-width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--app-soft);
  color: var(--app-primary);
  font-weight: 900;
}

.stat-card {
  height: 100%;
  padding: 24px;
}

.stat-card span {
  display: block;
  margin-bottom: 8px;
  color: var(--app-muted);
  font-weight: 750;
}

.stat-card strong {
  display: block;
  font-size: 2rem;
  line-height: 1.15;
}

.admin-action-card {
  min-height: 116px;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 22px;
  border: 1px solid var(--app-border);
  border-radius: 8px;
  background: #fff;
  color: var(--app-text);
  text-decoration: none;
  box-shadow: 0 12px 32px rgba(24, 61, 42, 0.06);
  transition: transform 0.16s ease, border-color 0.16s ease, box-shadow 0.16s ease;
}

.admin-action-card:hover {
  border-color: rgba(25, 135, 84, 0.35);
  box-shadow: 0 16px 42px rgba(25, 135, 84, 0.12);
  transform: translateY(-2px);
}

.admin-action-card i {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  border-radius: 8px;
  background: var(--app-soft);
  color: var(--app-primary);
  font-size: 1.35rem;
}

.admin-action-card strong,
.admin-action-card small {
  display: block;
}

.admin-action-card small {
  margin-top: 4px;
  color: var(--app-muted);
}

.attendance-time-box {
  display: grid;
  gap: 6px;
  padding: 16px;
  border: 1px solid var(--app-border);
  border-radius: 8px;
  background: var(--app-soft);
}

.attendance-time-box span {
  color: var(--app-muted);
  font-size: 0.88rem;
  font-weight: 750;
}

@keyframes resultShow {
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes resultPulse {
  0% {
    transform: scale(0.86);
  }
  55% {
    transform: scale(1.08);
  }
  100% {
    transform: scale(1);
  }
}

@media (max-width: 991.98px) {
  .attendance-shell {
    grid-template-columns: 1fr;
    align-content: center;
  }

  .attendance-hero {
    min-height: auto;
  }

  .admin-layout {
    display: block;
  }

  .admin-content {
    padding: 20px 16px 28px;
  }

  .admin-page-header {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (max-width: 576px) {
  .attendance-shell {
    width: min(100% - 24px, 440px);
    padding: 16px 0;
  }

  .attendance-hero {
    padding: 20px;
    gap: 18px;
  }

  .attendance-hero h1 {
    font-size: 1.7rem;
  }

  .attendance-hero p {
    font-size: 0.95rem;
  }

  .attendance-clock {
    width: 100%;
    justify-content: center;
  }

  .attendance-card {
    padding: 22px;
  }

  .date-filter-card {
    width: 100%;
  }

  .date-filter-card .d-flex {
    flex-direction: column;
  }

  .info-list div {
    grid-template-columns: 1fr;
    gap: 4px;
  }
}