:root {
  --bg: #f5f6f8;
  --card: #ffffff;
  --surface: #ffffff;
  --surface-hover: #f0f5ff;
  --chip: #eef1f5;
  --thead: #f0f2f5;
  --row-alt: #f7f8fa;
  --text: #1f2328;
  --muted: #6b7280;
  --border: #d8dce1;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --green-bg: #d7f5df;
  --green-border: #1a9e4b;
  --green-text: #0f5c2b;
  --red-bg: #fcdada;
  --red-border: #d63b3b;
  --red-text: #8a1f1f;
  --amber-bg: #fdf3d7;
  --amber-border: #d9a300;
  --amber-text: #8a5a00;
}

[data-theme="dark"] {
  --bg: #14171c;
  --card: #1d2129;
  --surface: #232830;
  --surface-hover: #2b3341;
  --chip: #2b3341;
  --thead: #232830;
  --row-alt: #232830;
  --text: #e6e8eb;
  --muted: #9aa3af;
  --border: #363d47;
  --accent: #6a97ff;
  --accent-hover: #85aaff;
  --green-bg: #16351f;
  --green-border: #37b765;
  --green-text: #86e0a6;
  --red-bg: #3a1c1c;
  --red-border: #e06060;
  --red-text: #ffa3a3;
  --amber-bg: #3a3117;
  --amber-border: #c9a233;
  --amber-text: #e7c96a;
}

* { box-sizing: border-box; }

[hidden] { display: none !important; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.5;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--card);
  border-bottom: 1px solid var(--border);
  transition: transform 0.25s ease;
}

.topbar.is-hidden {
  transform: translateY(-100%);
}

.topbar-inner {
  max-width: 760px;
  margin: 0 auto;
  padding: 12px 20px;
}

.topbar-row {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.topbar-row + .topbar-row {
  margin-top: 10px;
}

.topbar h1 {
  font-size: 1.15rem;
  margin: 0;
}

.tabs {
  margin-left: auto;
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.tab {
  padding: 6px 12px;
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: 6px;
  font: inherit;
  cursor: pointer;
  color: var(--muted);
}

.tab.is-active {
  background: var(--accent);
  border-color: var(--accent);
  color: #ffffff;
}

.progress {
  margin: 0 0 0 auto;
  color: var(--muted);
  font-size: 0.9rem;
}

.result {
  display: inline-block;
  font-weight: 700;
  padding: 8px 12px;
  border-radius: 8px;
}

.result.is-passed { background: var(--green-bg); color: var(--green-text); }
.result.is-almost { background: var(--amber-bg); color: var(--amber-text); }
.result.is-failed { background: var(--red-bg); color: var(--red-text); }

.content {
  max-width: 760px;
  margin: 0 auto;
  padding: 20px;
}

.quiz {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.card {
  position: relative;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 18px 20px;
}

.card-head {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
  min-height: 22px;
}

.card-head .question-source {
  margin: 0;
}

.question {
  font-size: 1.05rem;
  font-weight: 600;
  margin: 0 0 14px;
}

.question-source {
  margin: 0 0 6px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--accent);
}

.question .num {
  color: var(--muted);
  margin-right: 4px;
}

.answers {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.answer {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  width: 100%;
  text-align: left;
  padding: 12px 14px;
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: 8px;
  font: inherit;
  color: inherit;
  cursor: pointer;
  transition: background 0.12s, border-color 0.12s;
}

.answer:hover:not(:disabled) {
  border-color: var(--accent);
  background: var(--surface-hover);
}

.answer:disabled {
  cursor: default;
}

.answer .letter {
  flex: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--chip);
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 700;
}

.answer .text {
  flex: 1;
}

.answer.correct {
  background: var(--green-bg);
  border-color: var(--green-border);
}

.answer.correct .letter {
  background: var(--green-border);
  color: #ffffff;
}

.answer.wrong {
  background: var(--red-bg);
  border-color: var(--red-border);
}

.answer.wrong .letter {
  background: var(--red-border);
  color: #ffffff;
}

.answer.revealed {
  border-color: var(--green-border);
  box-shadow: inset 0 0 0 1px var(--green-border);
}

.answer.revealed .letter {
  background: var(--green-border);
  color: #ffffff;
}

.feedback {
  margin: 12px 2px 0;
  font-size: 0.9rem;
}

.feedback.is-correct { color: var(--green-text); }
.feedback.is-wrong { color: var(--red-text); }

.stats-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  font-size: 0.92rem;
}

.table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.table-wrap .stats-table {
  min-width: 520px;
}

.stats-table th,
.stats-table td {
  padding: 10px 12px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.stats-table thead th {
  background: var(--thead);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--muted);
}

.stats-table tbody tr:last-child th,
.stats-table tbody tr:last-child td {
  border-bottom: none;
}

.stats-total {
  font-weight: 700;
  background: var(--row-alt);
}

.st-passed { color: var(--green-text); }
.st-almost { color: var(--amber-text); }
.st-failed { color: var(--red-text); }

.stats-note {
  color: var(--muted);
  font-size: 0.85rem;
  margin: 0 0 14px;
}

.stats-actions {
  margin-top: 16px;
}

.clear-stats {
  padding: 10px 14px;
  background: var(--surface);
  color: var(--red-text);
  border: 1.5px solid var(--red-border);
  border-radius: 8px;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

.clear-stats:hover {
  background: var(--red-bg);
}

.stats-heading {
  font-size: 1rem;
  margin: 26px 0 10px;
}

.stats-subheading {
  font-size: 0.82rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  margin: 14px 0 6px;
}

.attempts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.attempt {
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  font-size: 0.88rem;
}

.attempt.is-passed { border-color: var(--green-border); color: var(--green-text); }
.attempt.is-almost { border-color: var(--amber-border); color: var(--amber-text); }
.attempt.is-failed { border-color: var(--red-border); color: var(--red-text); }

.rename-section {
  margin-top: 26px;
}

.rename-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.rename-row {
  display: flex;
  align-items: center;
  gap: 12px;
}

.rename-id {
  flex: none;
  width: 90px;
  color: var(--muted);
  font-size: 0.8rem;
}

.rename-input {
  flex: 1;
  min-width: 0;
  padding: 8px 10px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  font: inherit;
  background: var(--surface);
  color: inherit;
}

.rename-input:focus {
  outline: none;
  border-color: var(--accent);
}

.rename-save {
  flex: none;
  padding: 8px 14px;
  border: none;
  border-radius: 8px;
  background: var(--accent);
  color: #ffffff;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

.rename-save:hover:not(:disabled) {
  background: var(--accent-hover);
}

.rename-save:disabled {
  opacity: 0.7;
  cursor: default;
}

/* -------------------------------------------------------------- home view */

.home {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.welcome {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 22px 24px;
}

.welcome h2 {
  margin: 0 0 12px;
  font-size: 1.25rem;
}

.welcome p {
  margin: 0 0 10px;
}

.welcome p:last-child {
  margin-bottom: 0;
}

.subject-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

/* ------------------------------------------------------------- card grid */

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
  gap: 16px;
}

.grid-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 22px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
}

div.grid-card {
  cursor: default;
}

.grid-card:hover {
  border-color: var(--accent);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.08);
}

.grid-card.is-active {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent);
}

.card-icon {
  flex: 0 0 auto;
  width: 46px;
  height: 46px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: var(--chip);
  font-size: 24px;
  line-height: 1;
}

.card-body {
  min-width: 0;
}

.card-title {
  margin-bottom: 4px;
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.card-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--muted);
  font-size: 0.85rem;
}

.card-meta .sep {
  color: var(--border);
}

/* Compact variant used by the per-account summary cards. */
.card-grid--compact {
  grid-template-columns: repeat(auto-fill, minmax(215px, 1fr));
  gap: 12px;
}

.card-grid--compact .grid-card {
  padding: 13px 15px;
  gap: 12px;
}

.card-grid--compact .card-icon {
  width: 38px;
  height: 38px;
  font-size: 19px;
  border-radius: 10px;
}

.card-grid--compact .card-title {
  margin-bottom: 2px;
  font-size: 0.95rem;
}

.card-grid--compact .card-meta {
  font-size: 0.8rem;
  gap: 8px;
}

.card-tiers {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 3px;
  color: var(--muted);
  font-size: 0.75rem;
}

.card-tiers .sep {
  color: var(--border);
}

.tier-passed {
  color: var(--green-text);
}

.tier-almost {
  color: var(--amber-text);
}

.tier-failed {
  color: var(--red-text);
}

.back-button {
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface);
  color: var(--muted);
  font: inherit;
  font-size: 0.85rem;
  cursor: pointer;
}

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

.view-actions {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 12px;
}

.refresh-button {
  padding: 8px 14px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--accent);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

.refresh-button:hover:not(:disabled) {
  background: var(--surface-hover);
  border-color: var(--accent);
}

.refresh-button:disabled {
  opacity: 0.6;
  cursor: default;
}

/* ------------------------------------------------------------ small screens */

@media (max-width: 640px) {
  .topbar-inner {
    padding: 10px 12px;
  }

  .topbar h1 {
    font-size: 1rem;
  }

  .topbar-row {
    gap: 8px;
  }

  .topbar-row + .topbar-row {
    margin-top: 8px;
  }

  .tab {
    padding: 6px 10px;
    font-size: 0.88rem;
  }

  .account-name {
    font-size: 0.95rem;
  }

  .link-button {
    font-size: 0.82rem;
  }

  .content {
    padding: 12px;
  }

  .footer {
    padding: 6px 12px 28px;
  }

  .card {
    padding: 14px;
  }

  .question {
    font-size: 0.98rem;
  }

  .answer {
    padding: 11px 12px;
    gap: 10px;
  }

  .answer .letter {
    width: 24px;
    height: 24px;
  }

  .welcome {
    padding: 16px;
  }

  .welcome h2 {
    font-size: 1.1rem;
  }

  .stats-table th,
  .stats-table td {
    padding: 8px 9px;
    font-size: 0.84rem;
  }

  .rename-id {
    width: 62px;
    font-size: 0.72rem;
  }

  .rename-row {
    gap: 8px;
  }

  .rename-save {
    padding: 8px 10px;
    font-size: 0.85rem;
  }

  .refresh-button {
    padding: 7px 12px;
    font-size: 0.88rem;
  }

  .collapse-body {
    padding: 12px;
  }
}

.footer {
  max-width: 760px;
  margin: 0 auto;
  padding: 8px 20px 40px;
}

.reset {
  width: 100%;
  padding: 12px 16px;
  background: var(--surface);
  color: var(--red-text);
  border: 1.5px solid var(--red-border);
  border-radius: 8px;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

.reset:hover:not(:disabled) {
  background: var(--red-bg);
}

.reset:disabled {
  opacity: 0.5;
  cursor: default;
}

/* ------------------------------------------------------------------ login */

.login-view {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.login-card {
  width: 100%;
  max-width: 360px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px 26px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  text-align: center;
}

.login-title {
  margin: 0;
  font-size: 1.3rem;
}

.login-hint {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.login-input {
  width: 100%;
  padding: 12px 14px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  font: inherit;
  background: var(--surface);
  color: inherit;
  text-align: center;
  letter-spacing: 0.05em;
}

.login-input:focus {
  outline: none;
  border-color: var(--accent);
}

.login-button {
  padding: 12px 16px;
  border: none;
  border-radius: 8px;
  background: var(--accent);
  color: #ffffff;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

.login-button:hover {
  background: var(--accent-hover);
}

.login-error {
  margin: 0;
  color: var(--red-text);
  font-size: 0.85rem;
}

.account-name {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
}

.session-timer {
  padding: 3px 8px;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.session-timer.is-low {
  color: var(--red-text);
  border-color: var(--red-border);
}

.link-button {
  padding: 0;
  border: none;
  background: none;
  color: var(--accent);
  font: inherit;
  font-size: 0.85rem;
  cursor: pointer;
}

.link-button:hover {
  text-decoration: underline;
}

/* ------------------------------------------------------------- theme toggle */

.theme-section {
  margin-top: 26px;
}

.theme-options {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.theme-options--center {
  justify-content: center;
  margin-top: 4px;
}

.theme-option {
  padding: 8px 16px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

.theme-option:hover {
  border-color: var(--accent);
}

.theme-option.is-active {
  background: var(--accent);
  border-color: var(--accent);
  color: #ffffff;
}

/* ------------------------------------------------------ report a question */

.report-dot {
  flex: none;
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: var(--surface);
  color: var(--muted);
  font: inherit;
  font-size: 0.75rem;
  line-height: 1;
  cursor: pointer;
}

.report-dot:hover {
  border-color: var(--red-border);
  color: var(--red-text);
}

.report-box {
  margin: 12px 0 4px;
  padding: 12px;
  border: 1px dashed var(--border);
  border-radius: 8px;
  background: var(--bg);
}

/* --------------------------------------------------- messages and notes */

.message-input {
  width: 100%;
  padding: 10px 12px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  font: inherit;
  background: var(--surface);
  color: inherit;
  resize: vertical;
}

.message-input:focus {
  outline: none;
  border-color: var(--accent);
}

.message-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 10px;
}

.message-status {
  margin-right: auto;
  color: var(--muted);
  font-size: 0.82rem;
}

.message-section {
  margin-top: 26px;
}

.message-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.message-item {
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-left: 3px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
}

.message-item.is-unread {
  border-left-color: var(--accent);
  background: var(--surface-hover);
}

.message-meta {
  margin-bottom: 4px;
  font-size: 0.78rem;
  color: var(--muted);
}

.message-body {
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
}

.message-question {
  margin: 0 0 4px;
  font-size: 0.85rem;
}

.seen-button {
  padding: 6px 12px;
  border: 1.5px solid var(--accent);
  border-radius: 8px;
  background: var(--surface);
  color: var(--accent);
  font: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
}

.seen-button:hover:not(:disabled) {
  background: var(--accent);
  color: #ffffff;
}

.seen-button:disabled {
  opacity: 0.6;
  cursor: default;
}

/* ------------------------------------------------------ admin detail drawer */

.detail-panel {
  margin-top: 14px;
}

.detail-picker {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
}

.detail-pick {
  padding: 6px 12px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  font: inherit;
  font-size: 0.85rem;
  cursor: pointer;
}

.detail-pick:hover {
  border-color: var(--accent);
}

.detail-pick.is-active {
  background: var(--accent);
  border-color: var(--accent);
  color: #ffffff;
}

.detail-panel .stats-subheading {
  margin-top: 18px;
}

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

/* ------------------------------------------------- admin logins (per day) */

.day-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.day-section {
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--card);
  overflow: hidden;
}

.day-summary {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  background: var(--surface);
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  list-style: none;
}

.day-summary::-webkit-details-marker {
  display: none;
}

.day-summary::before {
  content: "\25B8";
  color: var(--muted);
  font-size: 0.75rem;
}

.day-section[open] .day-summary {
  border-bottom: 1px solid var(--border);
}

.day-section[open] .day-summary::before {
  content: "\25BE";
}

.day-count {
  margin-left: auto;
  color: var(--muted);
  font-weight: 400;
  font-size: 0.82rem;
}

.day-body {
  padding: 8px 14px 12px;
}

.day-body .attempts {
  gap: 0;
}

.day-body .login-entry {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 7px 2px;
  border: none;
  border-bottom: 1px solid var(--border);
  border-radius: 0;
  background: transparent;
}

.day-body .login-entry:last-child {
  border-bottom: none;
}

.login-time {
  flex: none;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

/* ---------------------------------------------------- collapsible sections */

.collapse-section {
  margin-top: 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--card);
  overflow: hidden;
}

.collapse-summary {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background: var(--surface);
  font-weight: 700;
  cursor: pointer;
  list-style: none;
}

.collapse-summary::-webkit-details-marker {
  display: none;
}

.collapse-summary::before {
  content: "\25B8";
  color: var(--muted);
  font-size: 0.75rem;
}

.collapse-section[open] .collapse-summary {
  border-bottom: 1px solid var(--border);
}

.collapse-section[open] .collapse-summary::before {
  content: "\25BE";
}

.collapse-badge {
  margin-left: auto;
  color: var(--muted);
  font-weight: 400;
  font-size: 0.82rem;
}

.collapse-body {
  padding: 14px 16px;
}

.collapse-body > :last-child {
  margin-bottom: 0;
}

/* ------------------------------------------------------ hard questions */

.hard-chip {
  flex: none;
  padding: 1px 7px;
  border-radius: 999px;
  background: var(--amber-bg);
  color: var(--amber-text);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.hard-toggle {
  padding: 6px 12px;
  border: 1.5px solid var(--amber-border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--amber-text);
  font: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  white-space: nowrap;
  cursor: pointer;
}

.hard-toggle:hover:not(:disabled) {
  background: var(--amber-bg);
}

.hard-toggle.is-active {
  background: var(--amber-bg);
  border-color: var(--amber-border);
}

.hard-toggle:disabled {
  opacity: 0.6;
  cursor: default;
}

.hard-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.hard-start {
  padding: 8px 14px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  font: inherit;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
}

.hard-start:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* ------------------------------------------------------------- M&B sheet */

.wb {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 18px 20px;
}

.wb-title {
  margin: 0 0 12px;
  font-size: 1.05rem;
  letter-spacing: 0.02em;
  text-align: center;
  text-transform: uppercase;
}

.wb-fields {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 10px;
}

.wb-field {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.wb-field-label {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--muted);
  text-transform: uppercase;
}

.wb-text,
.wb-select {
  width: 100%;
  padding: 7px 9px;
  border: 1.5px solid var(--border);
  border-radius: 7px;
  background: var(--surface);
  color: inherit;
  font: inherit;
  font-size: 0.9rem;
}

.wb-text:focus,
.wb-select:focus,
.wb-input:focus {
  outline: none;
  border-color: var(--accent);
}

.wb-clear {
  margin-top: 10px;
  padding: 6px 12px;
  border: 1.5px solid var(--border);
  border-radius: 7px;
  background: var(--surface);
  color: var(--text);
  font: inherit;
  font-size: 0.85rem;
  cursor: pointer;
}

.wb-clear:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.wb-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  margin-bottom: 16px;
  min-width: 460px;
}

.wb-th {
  padding: 8px 10px;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--muted);
  background: var(--thead);
  border: 1px solid var(--border);
  text-align: center;
}

.wb-row td {
  border: 1px solid var(--border);
  padding: 5px 8px;
}

.wb-label {
  width: 40%;
  text-align: left;
}

.wb-label-main {
  display: block;
}

.wb-label-sub {
  display: block;
  font-size: 0.72rem;
  color: var(--muted);
}

.wb-cell {
  width: 20%;
}

.wb-calc {
  width: 20%;
  text-align: right;
}

.wb-value {
  font-variant-numeric: tabular-nums;
}

.wb-input {
  width: 100%;
  padding: 6px 8px;
  border: 1.5px solid var(--border);
  border-radius: 6px;
  background: var(--surface);
  color: inherit;
  font: inherit;
  font-size: 0.9rem;
  text-align: right;
}

.wb-fuel {
  display: flex;
  align-items: center;
  gap: 6px;
}

.wb-fuel .wb-input {
  width: 72px;
}

.wb-unit {
  color: var(--muted);
  font-size: 0.8rem;
}

.wb-fuel-weight {
  margin-left: auto;
}

.wb-chart {
  margin: 10px 0 16px;
}

.wb-chart-title {
  margin: 0 0 8px;
  text-align: center;
  font-size: 0.95rem;
  font-weight: 600;
}

.wb-svg {
  display: block;
  width: 100%;
  height: auto;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.wb-grid {
  stroke: var(--border);
  stroke-width: 0.5;
}

.wb-plot {
  fill: none;
  stroke: var(--muted);
  stroke-width: 1;
}

.wb-envelope {
  fill: rgba(37, 99, 235, 0.08);
  stroke: var(--accent);
  stroke-width: 2;
}

.wb-tick {
  fill: var(--muted);
  font-size: 10px;
}

.wb-axis {
  fill: var(--muted);
  font-size: 11px;
}

.wb-point {
  fill: var(--green-border);
  stroke: #ffffff;
  stroke-width: 1.5;
}

.wb-point.is-bad {
  fill: var(--red-border);
}

.wb-point-label {
  fill: var(--green-text);
  font-size: 11px;
  font-weight: 700;
}

.wb-point-label.is-bad {
  fill: var(--red-text);
}

.wb-warnings {
  list-style: none;
  margin: 0 0 10px;
  padding: 0;
}

.wb-warnings li {
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.88rem;
  margin-bottom: 6px;
}

.wb-ok {
  background: var(--green-bg);
  color: var(--green-text);
  border-color: var(--green-border) !important;
}

.wb-bad {
  background: var(--red-bg);
  color: var(--red-text);
  border-color: var(--red-border) !important;
}

.wb-hint {
  margin: 0;
  color: var(--muted);
  font-size: 0.82rem;
}

/* ----------------------------------------------------- sheet switcher / print */

.sheet-switch {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin-bottom: 14px;
}

.sheet-btn {
  padding: 6px 14px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  font: inherit;
  font-weight: 600;
  font-size: 0.88rem;
  cursor: pointer;
}

.sheet-btn:hover {
  border-color: var(--accent);
}

.sheet-btn.is-active {
  background: var(--accent);
  border-color: var(--accent);
  color: #ffffff;
}

.print-button {
  margin-left: auto;
  padding: 6px 14px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--accent);
  font: inherit;
  font-weight: 600;
  font-size: 0.88rem;
  cursor: pointer;
}

.print-button:hover {
  background: var(--surface-hover);
  border-color: var(--accent);
}

/* ------------------------------------------------------------- send-mail */

.mail-slot:empty {
  display: none;
}

.mail-panel {
  margin-bottom: 14px;
  padding: 12px 14px;
  border: 1.5px solid var(--accent);
  border-radius: 10px;
  background: var(--surface);
}

.mail-head {
  margin: 0 0 10px;
  font-size: 0.95rem;
}

.mail-note {
  margin: -4px 0 10px;
  color: var(--muted);
  font-size: 0.8rem;
}

.mail-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.mail-email {
  flex: 1 1 220px;
  min-width: 170px;
  padding: 7px 10px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  background: var(--card);
  color: inherit;
  font: inherit;
  font-size: 0.85rem;
}

.mail-email:focus {
  outline: none;
  border-color: var(--accent);
}

.mail-select {
  padding: 7px 10px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  background: var(--card);
  color: inherit;
  font: inherit;
  font-size: 0.85rem;
}

.mail-status {
  display: inline-block;
  margin-top: 8px;
  color: var(--muted);
  font-size: 0.8rem;
}

.mail-status.is-ok {
  color: var(--green-text);
}

.mail-status.is-bad {
  color: var(--red-text);
}

.wb-head-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: flex-end;
  margin-top: 10px;
}

.wb-fuel-field {
  min-width: 160px;
}

.wb-select.is-required {
  border-color: var(--red-border);
  background: var(--red-bg);
  color: var(--red-text);
}

/* ------------------------------------------------------------------ navlog */

.nl {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px 18px;
}

.nl-title {
  margin: 0 0 12px;
  text-align: center;
  font-size: 1.02rem;
  letter-spacing: 0.03em;
}

.nl-top {
  display: grid;
  grid-template-columns: 1fr 240px;
  gap: 12px;
  margin-bottom: 12px;
}

.nl-fields {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  align-content: start;
}

.nl-field {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.nl-field-label {
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
}

.nl-input,
.nl-field input {
  width: 100%;
  padding: 5px 7px;
  border: 1px solid var(--border);
  border-radius: 5px;
  background: var(--surface);
  color: inherit;
  font: inherit;
  font-size: 0.85rem;
}

.nl-input:focus,
.nl-field input:focus {
  outline: none;
  border-color: var(--accent);
}

.nl-side {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.nl-side-title {
  margin-bottom: 4px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
}

.nl-freq,
.nl-check {
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
}

.nl-freq-row,
.nl-check-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 2px 0;
  font-size: 0.8rem;
}

.nl-freq-name {
  flex: 1;
  color: var(--muted);
}

.nl-freq-val {
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.nl-check-row {
  cursor: pointer;
}

.nl-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 12px;
  font-size: 0.82rem;
}

.nl-table th,
.nl-table td {
  border: 1px solid var(--border);
  padding: 3px 4px;
}

.nl-th {
  padding: 5px 4px;
  background: var(--thead);
  color: var(--muted);
  font-size: 0.66rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  text-align: center;
  white-space: pre-line;
}

.nl-table tbody th {
  padding: 5px 8px;
  background: var(--thead);
  text-align: left;
  font-size: 0.72rem;
  white-space: nowrap;
}

.nl-cell {
  padding: 2px 3px;
}

.nl-cell .nl-input {
  border: none;
  background: transparent;
  padding: 3px 4px;
}

.nl-waypoints .nl-cell {
  height: 22px;
}

.nl-waypoints td:nth-child(1) .nl-input {
  font-weight: 600;
}

/* -------------------------------------------------------------- printing */

@media print {
  :root,
  [data-theme="dark"] {
    --bg: #ffffff;
    --card: #ffffff;
    --surface: #ffffff;
    --surface-hover: #ffffff;
    --text: #000000;
    --muted: #444444;
    --border: #999999;
    --thead: #eeeeee;
    --row-alt: #f4f4f4;
    --chip: #eeeeee;
  }

  @page {
    margin: 12mm;
  }

  body {
    background: #ffffff;
    color: #000000;
  }

  .topbar,
  .footer,
  .sheet-switch,
  .print-button,
  .wb-hint,
  .wb-clear,
  .briefing-status,
  .link-button {
    display: none !important;
  }

  .content {
    max-width: none;
    padding: 0;
  }

  .view[hidden] {
    display: none !important;
  }

  .wb,
  .nl {
    border: none;
    border-radius: 0;
    padding: 0;
    background: #ffffff;
  }

  .wb-svg {
    border: 1px solid #999999;
  }

  .nl-waypoints tr,
  .nl-perf tr,
  .wb-row {
    page-break-inside: avoid;
  }
}

/* ------------------------------------------------------------------ weather */

.wx {
  padding: 16px 18px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--card);
}

.wx-title {
  margin: 0 0 6px;
  text-align: center;
  font-size: 1.05rem;
}

.wx-status {
  margin: 0 0 12px;
  text-align: center;
  color: var(--muted);
  font-size: 0.82rem;
}

.wx-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 16px;
}

.wx-card {
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
}

.wx-card-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}

.wx-icao {
  font-weight: 700;
  letter-spacing: 0.03em;
}

.wx-name {
  color: var(--muted);
  font-size: 0.85rem;
}

.wx-cat {
  margin-left: auto;
  padding: 2px 8px;
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 700;
}

.wx-cat.is-vfr {
  background: var(--green-bg);
  color: var(--green-text);
  border-color: var(--green-border);
}

.wx-cat.is-mvfr {
  background: var(--amber-bg);
  color: var(--amber-text);
  border-color: var(--amber-border);
}

.wx-cat.is-ifr,
.wx-cat.is-lifr {
  background: var(--red-bg);
  color: var(--red-text);
  border-color: var(--red-border);
}

.wx-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 6px 12px;
}

.wx-cell {
  display: flex;
  flex-direction: column;
}

.wx-cell-label {
  font-size: 0.66rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.wx-cell-value {
  font-size: 0.88rem;
  font-variant-numeric: tabular-nums;
}

.wx-raw {
  margin: 8px 0 0;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.76rem;
  white-space: pre-wrap;
  word-break: break-word;
}

.wx-none {
  margin: 4px 0;
  color: var(--muted);
  font-size: 0.85rem;
}

.wx-notam {
  padding-top: 12px;
  border-top: 1px solid var(--border);
}

.wx-section-title {
  margin: 0 0 6px;
  font-size: 1rem;
}

.wx-note {
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 0.82rem;
}

.wx-link {
  color: var(--accent);
}

.wx-textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: inherit;
  font: inherit;
  font-size: 0.85rem;
  resize: vertical;
}

.wx-textarea:focus {
  outline: none;
  border-color: var(--accent);
}

.wx-saved {
  display: inline-block;
  margin-top: 6px;
  color: var(--muted);
  font-size: 0.75rem;
}

/* ----------------------------------------------------------------- briefing */

.briefing {
  padding: 16px 18px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--card);
}

.briefing-title {
  margin: 0 0 12px;
  text-align: center;
  font-size: 1.15rem;
}

.briefing-status {
  color: var(--muted);
  font-size: 0.8rem;
}

.briefing-part {
  margin-top: 16px;
  padding-top: 12px;
  border-top: 2px solid var(--border);
}

.briefing-head {
  margin: 0 0 10px;
  font-size: 1rem;
  color: var(--accent);
}

.briefing-host .wb,
.briefing-host .nl,
.briefing-host .wx {
  padding: 0;
  border: none;
}

/* ------------------------------------------------------ M&B save / presets */

.wb-status {
  color: var(--muted);
  font-size: 0.8rem;
}

.wb-flight {
  border-color: var(--accent);
  color: var(--accent);
}

.preset-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
}

.preset-name {
  min-width: 160px;
  padding: 6px 10px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: inherit;
  font: inherit;
  font-size: 0.85rem;
}

.preset-name:focus {
  outline: none;
  border-color: var(--accent);
}

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

.preset-chip {
  display: inline-flex;
  align-items: stretch;
  overflow: hidden;
  border: 1.5px solid var(--border);
  border-radius: 999px;
  background: var(--chip);
}

.preset-load {
  border: none;
  background: transparent;
  color: var(--text);
  font: inherit;
  font-size: 0.82rem;
  font-weight: 600;
  padding: 4px 10px;
  cursor: pointer;
}

.preset-load:hover {
  background: var(--surface-hover);
}

.preset-del {
  border: none;
  border-left: 1px solid var(--border);
  background: transparent;
  color: var(--red-text);
  font: inherit;
  font-size: 0.9rem;
  line-height: 1;
  padding: 4px 8px;
  cursor: pointer;
}

.preset-del:hover {
  background: var(--red-bg);
}

.preset-none {
  color: var(--muted);
  font-size: 0.8rem;
}

/* --------------------------------------------------------------- logbook */

.logbook {
  padding: 16px 18px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--card);
}

.logbook-title {
  margin: 0 0 12px;
  text-align: center;
  font-size: 1.15rem;
}

.logbook-empty {
  color: var(--muted);
  font-size: 0.9rem;
  text-align: center;
}

.logbook-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.logbook-card {
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
}

.logbook-card-head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 6px;
}

.logbook-card-title {
  display: flex;
  flex: 1;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px;
}

.logbook-reg {
  font-weight: 700;
  letter-spacing: 0.03em;
}

.logbook-type {
  color: var(--muted);
  font-size: 0.85rem;
}

.logbook-route {
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 600;
}

.logbook-when {
  color: var(--muted);
  font-size: 0.78rem;
  white-space: nowrap;
}

.logbook-del {
  padding: 2px 8px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface);
  color: var(--red-text);
  font: inherit;
  font-size: 0.9rem;
  line-height: 1;
  cursor: pointer;
}

.logbook-del:hover {
  background: var(--red-bg);
  border-color: var(--red-border);
}

.logbook-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 14px;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 0.8rem;
}

.logbook-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
  gap: 6px 12px;
}

.logbook-grid + .logbook-grid {
  margin-top: 8px;
}

.logbook-cell {
  display: flex;
  flex-direction: column;
}

.logbook-cell-label {
  font-size: 0.66rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.logbook-cell-value {
  font-size: 0.88rem;
  font-variant-numeric: tabular-nums;
}

.logbook-form-select {
  padding: 6px 10px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: inherit;
  font: inherit;
  font-size: 0.85rem;
}

.logbook-badge {
  padding: 1px 7px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--chip);
  font-size: 0.7rem;
  font-weight: 700;
}

.logbook-remarks {
  margin: 8px 0 0;
  font-size: 0.85rem;
  white-space: pre-wrap;
}

.logbook-photo {
  display: block;
  width: 100%;
  max-width: 320px;
  margin-top: 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
}

/* ------------------------------------------------------- photo import */

.logbook-import {
  margin-bottom: 16px;
  padding: 12px 14px;
  border: 1.5px solid var(--accent);
  border-radius: 10px;
  background: var(--surface);
}

.logbook-import-head {
  margin: 0 0 4px;
  font-size: 1rem;
}

.logbook-import-note {
  margin: 0 0 10px;
  color: var(--muted);
  font-size: 0.82rem;
}

.logbook-import-body {
  display: grid;
  grid-template-columns: minmax(180px, 320px) 1fr;
  gap: 14px;
  align-items: start;
}

.logbook-import-photo {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 8px;
}

.logbook-import-fields {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 8px;
}

.logbook-import-field {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.logbook-import-label {
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
}

.logbook-import-input {
  width: 100%;
  padding: 5px 7px;
  border: 1px solid var(--border);
  border-radius: 5px;
  background: var(--card);
  color: inherit;
  font: inherit;
  font-size: 0.85rem;
}

.logbook-import-input:focus {
  outline: none;
  border-color: var(--accent);
}

.logbook-import-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-top: 12px;
}

.logbook-import-status {
  color: var(--muted);
  font-size: 0.82rem;
}

.logbook-import-status.is-bad {
  color: var(--red-text);
}

.logbook-import-check {
  margin-top: 12px;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--card);
}

.logbook-import-check.is-bad {
  border-color: var(--red-border);
  background: var(--red-bg);
}

.logbook-import-check.is-warn {
  border-color: var(--amber-border);
  background: var(--amber-bg);
}

.logbook-check-head {
  margin-bottom: 6px;
  font-size: 0.85rem;
  font-weight: 700;
}

.logbook-check-note {
  margin: 0;
  color: var(--muted);
  font-size: 0.82rem;
}

.logbook-check-list {
  margin: 0;
  padding-left: 18px;
  font-size: 0.82rem;
}

.logbook-check-item.is-match {
  color: var(--green-text);
}

.logbook-check-item.is-mismatch {
  color: var(--red-text);
  font-weight: 600;
}

.logbook-check-item.is-override {
  color: var(--amber-text);
  font-weight: 600;
}

.logbook-check-item.is-unknown {
  color: var(--muted);
}

.logbook-check-ref {
  margin-left: -14px;
  list-style: none;
  color: var(--muted);
}

.logbook-check-jump {
  margin-top: 8px;
}

@media (max-width: 720px) {
  .logbook-import-body {
    grid-template-columns: 1fr;
  }
}

@media print {
  .preset-bar,
  .wb-status,
  .logbook-del,
  .logbook-import,
  .mail-slot,
  .mail-panel {
    display: none !important;
  }

  .logbook {
    border: none;
    border-radius: 0;
    padding: 0;
    background: #ffffff;
  }

  .logbook-card {
    page-break-inside: avoid;
  }
}