:root {
  --color-primary: #124e78;
  --color-primary-dark: #0a3656;
  --color-accent: #f4b942;
  --color-ink: #17212b;
  --color-muted: #64748b;
  --color-border: #dbe4ea;
  --color-surface: #ffffff;
  --color-background: #f3f7fa;
  --color-success: #16835b;
  --shadow: 0 18px 55px rgb(22 49 71 / 10%);
  --radius-lg: 22px;
  --radius-md: 14px;
}

* {
  box-sizing: border-box;
}

html {
  color-scheme: light;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--color-ink);
  background:
    radial-gradient(circle at top left, rgb(18 78 120 / 9%), transparent 30rem),
    var(--color-background);
}

a {
  color: var(--color-primary);
}

button,
input,
select,
textarea {
  font: inherit;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.75rem 1rem;
  color: white;
  background: var(--color-primary-dark);
  border-radius: 0.5rem;
  transform: translateY(-200%);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 78px;
  padding: 0.9rem clamp(1rem, 5vw, 4rem);
  background: rgb(255 255 255 / 88%);
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: blur(12px);
}

.brand {
  display: inline-flex;
  gap: 0.8rem;
  align-items: center;
  color: var(--color-ink);
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 46px;
  height: 46px;
  place-items: center;
  color: white;
  font-weight: 800;
  background: var(--color-primary);
  border-radius: 13px;
  box-shadow: 0 8px 24px rgb(18 78 120 / 20%);
}

.brand strong,
.brand small {
  display: block;
}

.brand small {
  margin-top: 0.15rem;
  color: var(--color-muted);
  font-size: 0.75rem;
}

.user-nav {
  display: flex;
  gap: 1rem;
  align-items: center;
  color: var(--color-muted);
}

.nav-link {
  padding: 0.55rem 0.7rem;
  color: var(--color-primary-dark);
  font-weight: 700;
  text-decoration: none;
  border-radius: 8px;
}

.nav-link:hover,
.nav-link:focus-visible {
  background: #eaf1f5;
}

.page-shell {
  width: min(1180px, calc(100% - 2rem));
  min-height: calc(100vh - 144px);
  margin: 0 auto;
  padding: clamp(2rem, 6vw, 5rem) 0;
}

.hero {
  display: flex;
  gap: 2rem;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 3.5rem;
}

.hero h1,
.auth-intro h1 {
  max-width: 760px;
  margin: 0.45rem 0 0.8rem;
  font-size: clamp(2rem, 5vw, 4rem);
  line-height: 1.04;
  letter-spacing: -0.045em;
}

.hero p,
.auth-intro p,
.auth-card > p,
.card p {
  color: var(--color-muted);
  line-height: 1.65;
}

.eyebrow {
  color: var(--color-primary);
  font-size: 0.77rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.status-pill {
  display: inline-flex;
  flex-shrink: 0;
  gap: 0.55rem;
  align-items: center;
  padding: 0.65rem 0.9rem;
  color: var(--color-success);
  font-size: 0.85rem;
  font-weight: 700;
  background: rgb(22 131 91 / 9%);
  border: 1px solid rgb(22 131 91 / 18%);
  border-radius: 999px;
}

.status-pill span {
  width: 8px;
  height: 8px;
  background: var(--color-success);
  border-radius: 50%;
}

.section-heading h2 {
  margin: 0.4rem 0 1.5rem;
  font-size: clamp(1.5rem, 3vw, 2.2rem);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.card,
.auth-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.card {
  padding: 1.5rem;
}

.card h3 {
  margin: 1.25rem 0 0.4rem;
}

.card h2 {
  margin: 1.25rem 0 0.4rem;
  font-size: 1.2rem;
}

.card-link,
.back-link {
  display: inline-block;
  margin-top: 0.75rem;
  font-weight: 750;
  text-decoration: none;
}

.card-icon {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  color: var(--color-primary-dark);
  font-size: 0.78rem;
  font-weight: 800;
  background: rgb(244 185 66 / 25%);
  border-radius: 12px;
}

.auth-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(340px, 0.85fr);
  gap: clamp(2rem, 7vw, 7rem);
  align-items: center;
  min-height: 62vh;
}

.auth-intro p {
  max-width: 590px;
  font-size: 1.08rem;
}

.auth-card {
  padding: clamp(1.5rem, 4vw, 2.5rem);
}

.auth-card-centered {
  width: min(500px, 100%);
  margin: 2rem auto;
}

.auth-card h1,
.auth-card h2 {
  margin: 0.5rem 0;
}

.form-field {
  margin: 1.15rem 0;
}

.form-field label {
  display: block;
  margin-bottom: 0.45rem;
  font-size: 0.88rem;
  font-weight: 700;
}

.form-field input {
  width: 100%;
  min-height: 48px;
  padding: 0.75rem 0.9rem;
  color: var(--color-ink);
  background: white;
  border: 1px solid #b8c7d1;
  border-radius: 11px;
  outline: none;
}

.form-field select,
.form-field textarea {
  width: 100%;
  padding: 0.75rem 0.9rem;
  color: var(--color-ink);
  background: white;
  border: 1px solid #b8c7d1;
  border-radius: 11px;
  outline: none;
}

.form-field select {
  min-height: 48px;
}

.form-field textarea {
  resize: vertical;
}

.form-field select:focus,
.form-field textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px rgb(18 78 120 / 12%);
}

.form-field-checkbox {
  display: flex;
  gap: 0.65rem;
  align-items: center;
}

.form-field-checkbox label,
.form-field-checkbox input {
  width: auto;
  min-height: auto;
  margin: 0;
}

.field-help {
  display: block;
  margin-top: 0.35rem;
  color: var(--color-muted);
}

.form-field input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px rgb(18 78 120 / 12%);
}

.field-error {
  display: block;
  margin-top: 0.4rem;
  color: #a52020;
}

.form-alert,
.message {
  padding: 0.85rem 1rem;
  line-height: 1.45;
  border-radius: 10px;
}

.form-alert {
  color: #7b1b1b;
  background: #fff1f1;
  border: 1px solid #f5c2c2;
}

.button {
  display: inline-flex;
  min-height: 42px;
  padding: 0.7rem 1rem;
  align-items: center;
  justify-content: center;
  color: inherit;
  font-weight: 750;
  text-decoration: none;
  background: transparent;
  border: 0;
  border-radius: 10px;
  cursor: pointer;
}

.button-primary {
  color: white;
  background: var(--color-primary);
}

.button-primary:hover,
.button-primary:focus-visible {
  background: var(--color-primary-dark);
}

.button-secondary {
  color: var(--color-primary-dark);
  background: #eaf1f5;
}

.button-ghost:hover,
.button-ghost:focus-visible {
  background: #eaf1f5;
}

.button-block {
  width: 100%;
}

.auth-link {
  display: block;
  margin-top: 1.25rem;
  text-align: center;
}

.page-heading {
  margin-bottom: 1.5rem;
}

.page-heading h1 {
  margin: 0.4rem 0;
  font-size: clamp(2rem, 4vw, 3rem);
  letter-spacing: -0.035em;
}

.page-heading p {
  margin: 0;
  color: var(--color-muted);
}

.page-heading-actions,
.panel-heading,
.form-actions,
.search-bar,
.pagination {
  display: flex;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
}

.panel {
  padding: clamp(1.25rem, 3vw, 2rem);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.panel h2 {
  margin-top: 0;
}

.form-page {
  width: min(820px, 100%);
  margin: 0 auto;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 1.25rem;
}

.form-span,
.form-actions {
  grid-column: 1 / -1;
}

.form-actions {
  justify-content: flex-end;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border);
}

.search-bar {
  justify-content: flex-start;
  margin: 1rem 0;
}

.search-bar input {
  width: min(420px, 100%);
  min-height: 44px;
  padding: 0.7rem 0.9rem;
  border: 1px solid #b8c7d1;
  border-radius: 10px;
}

.table-shell {
  overflow-x: auto;
  background: white;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow);
}

.table-wrap {
  overflow-x: auto;
}

.muted {
  color: var(--color-muted);
}

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  padding: 0.9rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

th {
  color: var(--color-muted);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

tbody tr:last-child td {
  border-bottom: 0;
}

.table-action {
  text-align: right;
}

.badge {
  display: inline-flex;
  padding: 0.32rem 0.55rem;
  font-size: 0.76rem;
  font-weight: 750;
  border-radius: 999px;
}

.badge-success {
  color: #0f6948;
  background: #e5f6ef;
}

.badge-muted {
  color: #56616b;
  background: #edf1f3;
}

.badge-primary {
  color: var(--color-primary-dark);
  background: #e3f0f7;
}

.badge-danger {
  color: #8b1e1e;
  background: #feecec;
}

.badge-warning {
  color: #725000;
  background: #fff2cd;
}

.button-danger {
  color: #8b1e1e;
  background: #feecec;
}

.action-row,
.subnav {
  display: flex;
  gap: 0.65rem;
  align-items: center;
  flex-wrap: wrap;
}

.action-row form {
  margin: 0;
}

.action-row-end {
  justify-content: flex-end;
}

.link-button-success {
  color: #0f6948;
}

.link-success {
  color: #0f6948;
}

.link-danger {
  color: #8b1e1e;
}

.status-detail {
  display: block;
  margin-top: 0.25rem;
  color: var(--color-muted);
}

.search-bar select {
  min-height: 44px;
  padding: 0.65rem 0.8rem;
  background: white;
  border: 1px solid #b8c7d1;
  border-radius: 10px;
}

.search-bar-wrap {
  flex-wrap: wrap;
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
}

.metric-card {
  padding: 1.15rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow);
}

.metric-card small,
.compact-details dt {
  color: var(--color-muted);
}

.metric-card strong {
  display: block;
  margin-top: 0.35rem;
  font-size: 1.7rem;
}

.enrollment-grid {
  grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
}

.class-card h2 {
  margin-bottom: 0.5rem;
}

.compact-details {
  margin: 1rem 0;
}

.compact-details div {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--color-border);
}

.compact-details dd {
  margin: 0;
  font-weight: 700;
  text-align: right;
}

.frequency-row {
  display: flex;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--color-border);
}

.frequency-row small {
  display: block;
  margin-top: 0.25rem;
  color: var(--color-muted);
}

.frequency-value {
  color: var(--color-primary-dark);
  font-size: 1.25rem;
}

.attendance-page {
  width: min(980px, 100%);
  margin: 0 auto;
}

.attendance-list {
  display: grid;
  gap: 0.75rem;
}

.attendance-entry {
  display: grid;
  grid-template-columns: minmax(220px, 1fr) minmax(170px, 0.5fr) minmax(240px, 1fr);
  gap: 1rem;
  padding: 1rem 1.25rem;
  align-items: end;
}

.attendance-entry .form-field {
  margin: 0;
}

.attendance-entry input:disabled {
  color: var(--color-ink);
  background: #f5f8fa;
  opacity: 1;
}

.attendance-actions {
  margin-top: 1rem;
}

.frequency-card h2 {
  margin-bottom: 0.35rem;
}

.subnav {
  margin-bottom: 1.25rem;
  border-bottom: 1px solid var(--color-border);
}

.subnav a {
  padding: 0.7rem 0.2rem;
  font-weight: 750;
  text-decoration: none;
}

.subnav a[aria-current="page"] {
  border-bottom: 3px solid var(--color-primary);
}

.section-gap {
  margin-top: 1rem;
}

.summary-panel {
  margin-bottom: 1rem;
}

.schedule-item {
  display: flex;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--color-border);
}

.schedule-item small {
  display: block;
  margin-top: 0.25rem;
  color: var(--color-muted);
}

.link-button {
  padding: 0;
  color: #8b1e1e;
  font-weight: 700;
  background: transparent;
  border: 0;
  cursor: pointer;
  text-decoration: underline;
}

.empty-state,
.empty-copy {
  color: var(--color-muted);
  text-align: center;
}

.pagination {
  justify-content: center;
  margin-top: 1.25rem;
  color: var(--color-muted);
}

.detail-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 1rem;
}

.detail-list {
  margin: 0;
}

.detail-list div {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 1rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--color-border);
}

.detail-list dt {
  color: var(--color-muted);
  font-size: 0.84rem;
}

.detail-list dd {
  margin: 0;
  font-weight: 650;
}

.stack-item {
  display: flex;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--color-border);
}

.stack-item small {
  display: block;
  margin-top: 0.25rem;
  color: var(--color-muted);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.site-footer {
  padding: 1.5rem;
  color: var(--color-muted);
  font-size: 0.82rem;
  text-align: center;
}

@media (max-width: 780px) {
  .site-header,
  .hero {
    align-items: flex-start;
  }

  .auth-layout,
  .card-grid,
  .detail-grid,
  .form-grid,
  .metric-grid,
  .attendance-entry {
    grid-template-columns: 1fr;
  }

  .page-heading-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .user-nav {
    flex-wrap: wrap;
    justify-content: flex-end;
  }

  .auth-intro {
    text-align: center;
  }

  .user-nav > span {
    display: none;
  }
}

@media (max-width: 520px) {
  .brand small {
    display: none;
  }

  .hero {
    flex-direction: column;
  }

  .page-shell {
    width: min(100% - 1.25rem, 1180px);
  }
}


.certificate-preview {
  position: relative;
  overflow: hidden;
  padding: clamp(2rem, 7vw, 5rem);
  text-align: center;
  background: white;
  border: 3px solid var(--color-primary);
  box-shadow:
    inset 0 0 0 10px white,
    inset 0 0 0 12px var(--color-accent),
    var(--shadow);
}

.certificate-preview h2 {
  margin: 1.5rem 0 2rem;
  color: var(--color-primary-dark);
  font-size: clamp(2rem, 5vw, 3.6rem);
  letter-spacing: -0.035em;
}

.certificate-name {
  display: block;
  margin: 1rem 0;
  color: var(--color-primary-dark);
  font-size: clamp(1.8rem, 4vw, 3rem);
}

.certificate-metadata {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
  margin: 2rem 0;
}

.certificate-metadata div {
  padding: 1rem;
  background: var(--color-background);
  border-radius: var(--radius-md);
}

.certificate-metadata dt {
  color: var(--color-muted);
  font-size: 0.78rem;
  text-transform: uppercase;
}

.certificate-metadata dd {
  margin: 0.4rem 0 0;
  font-weight: 750;
}

.certificate-code {
  margin-top: 2rem;
  font-size: 0.85rem;
}

.certificate-revoked {
  opacity: 0.82;
}

.certificate-stamp {
  position: absolute;
  top: 48%;
  left: 50%;
  padding: 0.4rem 1rem;
  color: #a52020;
  font-size: clamp(2rem, 8vw, 5rem);
  font-weight: 900;
  border: 6px solid #a52020;
  transform: translate(-50%, -50%) rotate(-12deg);
}

@media (max-width: 780px) {
  .certificate-metadata {
    grid-template-columns: repeat(2, 1fr);
  }
}


.reporting-filters {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0 1rem;
  margin-bottom: 1rem;
}

.reporting-filters .form-field {
  margin-top: 0;
}

.reporting-metrics {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.metric-card span {
  display: block;
  color: var(--color-muted);
  font-size: 0.78rem;
}

.distribution-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.7rem 0;
  border-bottom: 1px solid var(--color-border);
}

.distribution-row:last-child {
  border-bottom: 0;
}

.privacy-note {
  margin: 1rem 0 0;
  color: var(--color-muted);
  font-size: 0.82rem;
  line-height: 1.5;
}

@media (max-width: 980px) {
  .reporting-filters,
  .reporting-metrics {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 520px) {
  .reporting-filters,
  .reporting-metrics {
    grid-template-columns: 1fr;
  }
}