:root {
  --bg: #f3f6fb;
  --surface: #ffffff;
  --surface-alt: #f7f9fd;
  --text: #1c2430;
  --muted: #6d7784;
  --line: #d9e0ea;
  --brand: #0e4aa8;
  --ok: #2e7d32;
  --warn: #ef6c00;
  --err: #c62828;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: linear-gradient(180deg, #eef3fb 0%, #f6f8fc 100%);
  color: var(--text);
  font-family: "Segoe UI", "Trebuchet MS", Arial, sans-serif;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 22px;
  border-bottom: 1px solid var(--line);
  background: var(--surface);
  position: sticky;
  top: 0;
  z-index: 20;
}

.topbar__left {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.brand {
  text-decoration: none;
  color: var(--brand);
  font-weight: 700;
  font-size: 20px;
}

.brand__sub {
  color: var(--muted);
  font-size: 14px;
}

.topbar__nav {
  display: flex;
  gap: 14px;
  align-items: center;
}

.topbar__nav a,
.link-button {
  text-decoration: none;
  color: var(--text);
  font-size: 14px;
  background: none;
  border: 0;
  cursor: pointer;
}

.page {
  max-width: 1500px;
  margin: 18px auto;
  padding: 0 16px 24px;
  display: grid;
  gap: 16px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px;
}

.filters-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.login-card {
  max-width: 460px;
  margin: 48px auto;
}

h1,
h2,
h3 {
  margin-top: 0;
}

.filters-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 12px;
}

.form-grid {
  display: grid;
  gap: 12px;
}

label {
  display: grid;
  gap: 6px;
  font-weight: 600;
  font-size: 14px;
}

.class-filter-box {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 8px 10px;
  margin: 0;
}

.class-filter-box summary {
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  margin-bottom: 8px;
}

.class-filter-search {
  width: 100%;
  margin-bottom: 8px;
}

.class-filter-actions {
  display: flex;
  gap: 8px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}

.class-filter-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 6px 10px;
  margin-bottom: 6px;
}

.check-inline {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 500;
}

.class-filter-label.is-hidden {
  display: none;
}

.date-filter-box {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px;
  background: #fbfcff;
  display: grid;
  gap: 8px;
  grid-column: span 2;
}

.date-filter-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
}

.date-filter-inputs {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.date-filter-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.date-preset-btn.is-active {
  background: var(--brand);
  border-color: var(--brand);
  color: #fff;
}

input,
textarea,
select,
button,
.button-secondary {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 8px 10px;
  font-size: 14px;
}

button {
  background: var(--brand);
  color: #fff;
  border-color: var(--brand);
  cursor: pointer;
}

.button-secondary {
  text-decoration: none;
  color: var(--text);
  background: var(--surface-alt);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.filters-actions,
.actions-row {
  display: flex;
  gap: 8px;
  align-items: end;
}

.filter-chips {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-top: 10px;
}

.chip {
  border: 1px solid var(--line);
  background: var(--surface-alt);
  color: var(--text);
  border-radius: 999px;
  padding: 3px 8px;
  font-size: 12px;
}

.chip-class {
  background: #e8f0ff;
  border-color: #cddcff;
}

.cards-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 12px;
}

.metric-card {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
  padding: 14px;
}

.metric-card h3 {
  margin: 0;
  font-size: 13px;
  font-weight: 600;
  color: var(--muted);
}

.metric-card strong {
  display: inline-block;
  margin-top: 8px;
  font-size: 22px;
}

.metric-card--processed strong,
.metric-card--online strong {
  color: var(--ok);
}

.metric-card--pending strong {
  color: var(--warn);
}

.metric-card--error strong,
.metric-card--offline strong {
  color: var(--err);
}

.two-columns {
  display: grid;
  gap: 16px;
  grid-template-columns: 2fr 1fr;
}

.two-columns--single {
  grid-template-columns: 1fr;
}

.filters-grid--viewer {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.filters-grid--viewer .date-filter-box,
.filters-grid--viewer .class-filter-box,
.filters-grid--viewer .filters-actions {
  grid-column: 1 / -1;
}

.table-wrap {
  overflow: auto;
}

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.table th,
.table td {
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
  padding: 10px 8px;
}

.table thead th {
  background: var(--surface-alt);
  position: sticky;
  top: 0;
  z-index: 1;
}

.badge-wrap {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.exam-thumb {
  width: 140px;
  max-height: 90px;
  object-fit: cover;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: #fff;
}

.class-badge,
.status-badge {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 3px 8px;
  color: #fff;
  font-size: 11px;
  font-weight: 700;
}

.status-pending {
  background: var(--warn);
}

.status-processed {
  background: var(--ok);
}

.status-error {
  background: var(--err);
}

.status-online {
  background: var(--ok);
}

.status-offline {
  background: #7f8c8d;
}

.ubs-line {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.online-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  display: inline-block;
}

.online-dot.online {
  background: var(--ok);
}

.online-dot.offline {
  background: var(--err);
}

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

.alert {
  display: inline-block;
  border-radius: 8px;
  padding: 6px 10px;
  font-size: 12px;
}

.alert-error {
  background: #fdeaea;
  color: #9b1c1c;
  border: 1px solid #f2bcbc;
}

.alert-ok {
  background: #e8f5e9;
  color: #1b5e20;
  border: 1px solid #b7dfbd;
}

.pagination {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 10px;
}

.table-summary {
  margin-top: -4px;
  margin-bottom: 10px;
}

.exam-row {
  transition: background-color 0.15s ease;
}

.exam-row:hover {
  background: #f7faff;
}

.exam-row--error {
  box-shadow: inset 3px 0 0 #f8b4b4;
}

.exam-row--pending {
  box-shadow: inset 3px 0 0 #f9d39e;
}

.details-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 16px;
}

.info-list {
  margin: 0;
  display: grid;
  grid-template-columns: 170px 1fr;
  gap: 8px 12px;
}

.info-list dt {
  color: var(--muted);
  font-weight: 600;
}

.info-list dd {
  margin: 0;
}

.header-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
}

.actions-col {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
}

.mini-form {
  margin: 0;
}

.mini-form button {
  padding: 6px 10px;
  font-size: 12px;
}

.danger-button {
  background: var(--err);
  border-color: var(--err);
  color: #fff;
}

.admin-batch-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items: end;
  margin-bottom: 12px;
}

.admin-batch-actions label {
  min-width: 320px;
}

.class-count-badge {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 3px 8px;
  font-size: 11px;
  font-weight: 600;
  background: #eef3ff;
  border: 1px solid #d1defc;
  color: #183157;
}

.mt-12 {
  margin-top: 12px;
}

.inline-credentials-form {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  align-items: center;
}

.inline-credentials-form input {
  min-width: 170px;
  max-width: 220px;
}

.exam-image {
  width: 100%;
  max-width: 100%;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: #fff;
}

.exam-image-link {
  display: block;
}

@media (max-width: 1200px) {
  .filters-grid,
  .cards-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .two-columns {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .filters-grid,
  .cards-grid,
  .details-grid {
    grid-template-columns: 1fr;
  }

  .filters-head {
    flex-direction: column;
    align-items: flex-start;
  }

  .class-filter-list {
    grid-template-columns: 1fr;
  }

  .date-filter-box {
    grid-column: auto;
  }

  .date-filter-inputs {
    grid-template-columns: 1fr;
  }

  .topbar {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .info-list {
    grid-template-columns: 1fr;
  }
}