:root {
  --bg: #f3f6fb;
  --card: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --primary: #006eff;
  --success: #0f9d58;
  --danger: #dc2626;
  --warning: #d97706;
  --border: #e5e7eb;
  --shadow: 0 20px 50px rgba(15, 23, 42, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(0, 110, 255, 0.12), transparent 28%),
    radial-gradient(circle at top right, rgba(15, 157, 88, 0.08), transparent 24%),
    var(--bg);
  -webkit-text-size-adjust: 100%;
}

.page {
  width: min(1180px, calc(100% - 24px));
  margin: 0 auto;
  padding: calc(24px + env(safe-area-inset-top)) 0 calc(48px + env(safe-area-inset-bottom));
}

.hero {
  margin-bottom: 24px;
}

.hero-badge {
  display: inline-block;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(0, 110, 255, 0.1);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
}

.hero h1 {
  margin: 14px 0 8px;
  font-size: 34px;
  line-height: 1.2;
}

.hero p {
  margin: 0;
  color: var(--muted);
  font-size: 16px;
}

.layout {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 20px;
  align-items: start;
}

.card {
  background: var(--card);
  border: 1px solid rgba(255, 255, 255, 0.7);
  border-radius: 24px;
  box-shadow: var(--shadow);
  padding: 28px;
}

.section-title {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 18px;
}

.form {
  display: grid;
  gap: 18px;
}

.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.field {
  display: grid;
  gap: 8px;
}

.field span {
  font-size: 14px;
  font-weight: 600;
}

.field span em {
  color: var(--danger);
  font-style: normal;
}

.field input,
.field select,
.history-toolbar input,
.history-toolbar select {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: 14px;
  font-size: 16px;
  background: #fafbfc;
  transition: border-color 0.2s, box-shadow 0.2s;
  min-height: 48px;
}

.field input:focus,
.field select:focus,
.history-toolbar input:focus,
.history-toolbar select:focus {
  outline: none;
  border-color: rgba(0, 110, 255, 0.45);
  box-shadow: 0 0 0 4px rgba(0, 110, 255, 0.12);
  background: #fff;
}

.end-preview {
  margin-top: -6px;
  min-height: 20px;
  color: var(--muted);
  font-size: 13px;
}

.submit-btn {
  border: none;
  border-radius: 14px;
  padding: 16px 18px;
  background: linear-gradient(135deg, var(--primary), #2f8bff);
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.15s ease, opacity 0.15s ease;
  width: 100%;
  min-height: 52px;
}

.submit-btn:hover:not(:disabled) {
  transform: translateY(-1px);
}

.submit-btn:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

.status {
  margin-top: 18px;
  padding: 14px 16px;
  border-radius: 14px;
  font-size: 14px;
}

.status.error {
  background: rgba(220, 38, 38, 0.08);
  color: var(--danger);
}

.status.loading {
  background: rgba(0, 110, 255, 0.08);
  color: var(--primary);
}

.result {
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.result h2 {
  margin: 0 0 16px;
  font-size: 22px;
  color: var(--success);
}

.result-grid {
  display: grid;
  gap: 14px;
}

.result-item {
  display: grid;
  gap: 4px;
  padding: 14px 16px;
  border-radius: 14px;
  background: #f8fafc;
}

.result-item .label {
  color: var(--muted);
  font-size: 13px;
}

.result-item strong {
  font-size: 16px;
  word-break: break-all;
}

.result-item .code {
  font-size: 24px;
  letter-spacing: 2px;
}

.actions,
.history-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.action {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px 14px;
  background: #fff;
  color: var(--text);
  font-size: 14px;
  text-decoration: none;
  cursor: pointer;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.action.small {
  padding: 8px 12px;
  font-size: 13px;
}

.action.primary {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

.action.danger {
  color: var(--danger);
  border-color: rgba(220, 38, 38, 0.25);
}

.history-card {
  position: sticky;
  top: 20px;
  max-height: calc(100vh - 40px);
  display: flex;
  flex-direction: column;
}

.history-header {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: start;
  margin-bottom: 14px;
}

.history-subtitle {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.history-toolbar {
  display: grid;
  grid-template-columns: 1fr 120px;
  gap: 10px;
  margin-bottom: 16px;
}

.history-list {
  display: grid;
  gap: 14px;
  overflow: auto;
  padding-right: 4px;
}

.history-empty {
  padding: 28px 16px;
  text-align: center;
  color: var(--muted);
  border: 1px dashed var(--border);
  border-radius: 16px;
}

.history-item {
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 16px;
  background: #fafbfc;
}

.history-item-top {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: start;
}

.history-item h3 {
  margin: 0 0 6px;
  font-size: 16px;
}

.history-meta {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.status-pill {
  flex-shrink: 0;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
}

.status-pill.upcoming,
.status-pill.scheduled {
  background: rgba(0, 110, 255, 0.1);
  color: var(--primary);
}

.status-pill.ended {
  background: rgba(107, 114, 128, 0.12);
  color: var(--muted);
}

.status-pill.cancelled {
  background: rgba(220, 38, 38, 0.1);
  color: var(--danger);
}

.history-details {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px 12px;
  margin-top: 14px;
}

.history-details div {
  display: grid;
  gap: 2px;
}

.history-details div.full {
  grid-column: 1 / -1;
}

.history-details span {
  color: var(--muted);
  font-size: 12px;
}

.history-details strong {
  font-size: 14px;
  word-break: break-all;
}

.hidden {
  display: none;
}

@media (max-width: 960px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .history-card {
    position: static;
    max-height: none;
  }
}

@media (max-width: 640px) {
  .page {
    width: calc(100% - 16px);
    padding-top: calc(16px + env(safe-area-inset-top));
  }

  .hero {
    margin-bottom: 16px;
  }

  .hero h1 {
    font-size: 26px;
  }

  .hero p {
    font-size: 14px;
    line-height: 1.6;
  }

  .card {
    padding: 16px;
    border-radius: 18px;
  }

  .section-title {
    font-size: 18px;
    margin-bottom: 14px;
  }

  .field-row,
  .history-toolbar {
    grid-template-columns: 1fr;
  }

  .history-header {
    flex-direction: column;
    align-items: stretch;
  }

  .history-header .action.small {
    width: 100%;
  }

  .history-item-top {
    flex-direction: column;
    gap: 8px;
  }

  .history-details {
    grid-template-columns: 1fr;
  }

  .actions,
  .history-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
  }

  .actions .action.primary,
  .history-actions .action.primary {
    grid-column: 1 / -1;
  }

  .actions .action,
  .history-actions .action {
    width: 100%;
    padding: 12px 10px;
    font-size: 13px;
  }

  .result-item .code {
    font-size: 20px;
    letter-spacing: 1px;
  }

  .history-list {
    max-height: none;
  }
}

/* Student affairs presentation and interaction states */
:root { --primary: #006eff; --bg: #f3f6fb; --shadow: 0 12px 38px rgba(26,55,45,.06); }
body { background: radial-gradient(ellipse at top left, #e7f0ff, transparent 55%), var(--bg); }
.hero { padding: 12px 0 6px; }
.hero-badge { background: #e6f0ff; color: var(--primary); letter-spacing: 1px; }
.hero h1 { color: #17345e; }
.card { border: 1px solid #e2e8f0; border-radius: 20px; }
.submit-btn { background: var(--primary); }
.action:focus-visible, summary:focus-visible, .mobile-tabs button:focus-visible { outline: 3px solid #80b7ff; outline-offset: 3px; }
.action:disabled { opacity: .5; cursor: wait; }
.result { padding: 22px; border: 1px solid #cfe0fa; background: #f3f7ff; border-radius: 16px; }
.result-hint { color: var(--muted); font-size: 14px; }
.result-grid { grid-template-columns: 1fr 1fr; }
.result-item:has(.code), #result-notes-row { grid-column: 1 / -1; }
.result-item .code { font-size: 32px; color: #006eff; letter-spacing: 4px; }
.history-group { margin: 16px 0 0; font-size: 13px; color: #526988; }
.history-item { background: #fff; }
.history-actions { align-items: start; }
.history-actions .primary { background: #e7f0ff; color: #006eff; border-color: #ccddf5; }
.status-pill.ongoing { background: #e4f5e8; color: #18733d; }
.more-actions { position: relative; margin-left: auto; }
.more-actions summary { list-style: none; }
.more-actions summary::-webkit-details-marker { display: none; }
.more-menu { position: absolute; right: 0; bottom: calc(100% + 6px); z-index: 2; min-width: 140px; padding: 6px; background: white; border: 1px solid var(--border); border-radius: 12px; box-shadow: var(--shadow); }
.more-menu button { width: 100%; margin: 2px 0; }
.history-list { padding: 0 4px 12px 0; }
#history-count { margin-bottom: 4px; }
.toast { position: fixed; bottom: calc(24px + env(safe-area-inset-bottom)); left: 50%; transform: translateX(-50%); z-index: 10; width: max-content; max-width: calc(100% - 32px); padding: 14px 20px; border-radius: 12px; color: white; background: #17345e; box-shadow: var(--shadow); }
.skeleton { height: 160px; border-radius: 16px; background: linear-gradient(100deg, #eef2f8 30%, #fafcff 50%, #eef2f8 70%); background-size: 200% 100%; animation: shimmer 1.5s infinite; }
@keyframes shimmer { to { background-position: -200% 0; } }
.mobile-tabs { display: none; }
@media(max-width:640px) {
  .mobile-tabs { display: grid; grid-template-columns: 1fr 1fr; gap: 4px; margin: 0 0 16px; background: #e6edf7; padding: 4px; border-radius: 12px; }
  .mobile-tabs button { border: 0; padding: 12px; border-radius: 9px; background: transparent; color: #526988; font-size: 15px; }
  .mobile-tabs button[aria-pressed="true"] { background: white; color: #006eff; font-weight: 700; box-shadow: 0 2px 6px #17345e10; }
  #history-panel { display: none; }
  .show-history #booking-panel { display: none; }
  .show-history #history-panel { display: flex; }
  .history-header { flex-direction: row; align-items: start; }
  .history-header .action.small { width: auto; }
  .history-actions { display: flex; flex-wrap: wrap; }
  .history-actions .action { width: auto; }
  .history-actions .action.primary { flex: 1; }
  .more-actions { margin-left: 0; }
  .result { padding: 16px; }
  .result-grid { grid-template-columns: 1fr; }
  .result-item .code { font-size: 28px; }
  .hero h1 { font-size: 28px; }
}
@media(prefers-reduced-motion:reduce) { *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; } }

.status-pill.pending {background:#fff1cf;color:#986500;}

.success-dialog { width: min(560px, calc(100% - 28px)); max-height: calc(100dvh - 48px); overflow: auto; margin: auto; padding: 28px; box-shadow: 0 24px 90px #15325c40; color: var(--text); }
.success-dialog::backdrop { background: #10284780; backdrop-filter: blur(4px); }
.success-dialog .result-grid { gap: 10px; }
.success-dialog .result-item { padding: 10px 14px; }
.dialog-close { position: absolute; right: 12px; top: 12px; width: 40px; height: 40px; background: transparent; border: 0; font-size: 28px; color: #526988; cursor: pointer; border-radius: 8px; }
.success-dialog h2 { padding-right: 36px; }
.modal-open { overflow: hidden; }
.success-dialog .toast { position: sticky; bottom: 0; left: auto; transform: none; width: auto; margin-top: 12px; text-align: center; }
@media(max-width:640px) { .success-dialog { padding: 20px; } }


.notice-dialog { max-width: 420px; }
.notice-message { white-space: pre-wrap; overflow-wrap: anywhere; line-height: 1.8; user-select: text; -webkit-user-select: text; }
.in-wechat input[type="datetime-local"] { min-width: 0; max-width: 100%; }
.in-wechat .field { min-width: 0; }

.poster-dialog { background: #fff; }
#poster-image { display: block; width: 100%; height: auto; border-radius: 16px; -webkit-touch-callout: default; user-select: auto; }

#result .result-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
#result .result-actions #copy-info { grid-column: 1 / -1; }
#result .result-actions .action { width: 100%; }

.logged-out .layout, .logged-out .mobile-tabs { display:none; }
.auth-card { max-width: 440px; margin: 24px auto; }
.auth-tabs { display:flex; gap:10px; margin:20px 0; }
.auth-tabs button { flex:1; }
.account-bar { display:flex; align-items:center; justify-content:space-between; margin-bottom:18px; color:#526988; }
.account-bar.hidden { display:none; }