* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  font-family: Arial, Helvetica, sans-serif;
  background: #f8fafc;
  color: #0f172a;
}

.hidden {
  display: none !important;
}

.muted {
  color: #64748b;
}

.error {
  color: #b91c1c;
}

.center-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.login-card {
  width: min(420px, 100%);
  background: #fff;
  border-radius: 16px;
  padding: 24px;
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
}

.login-card input {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid #cbd5e1;
  border-radius: 10px;
  margin: 12px 0;
}

.login-card button,
.header-actions button,
.tab-btn,
.toolbar select,
.toolbar input,
.favorite-btn {
  font: inherit;
}

.login-card button,
.header-actions button,
.tab-btn {
  padding: 10px 14px;
  border: none;
  border-radius: 10px;
  background: #0f172a;
  color: #fff;
  cursor: pointer;
}

.app-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: #fff;
  padding: 16px 14px;
  border-bottom: 1px solid #e2e8f0;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: flex-start;
}

.app-header h1 {
  margin: 0 0 4px 0;
  font-size: 1.25rem;
}

.header-actions {
  display: flex;
  gap: 8px;
}

.toolbar {
  padding: 12px 14px;
  background: #fff;
  border-bottom: 1px solid #e2e8f0;
  position: sticky;
  top: 73px;
  z-index: 19;
}

.toolbar-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

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

.tab-btn {
  background: #334155;
}

.tab-btn.active {
  background: #0f172a;
}

.filters select,
.filters input {
  padding: 10px 12px;
  border: 1px solid #cbd5e1;
  border-radius: 10px;
  background: #fff;
}

.filters input {
  flex: 1;
  min-width: 220px;
}

#mainContent {
  padding: 14px;
  display: grid;
  gap: 12px;
}

.session-card {
  background: #fff;
  border-radius: 16px;
  padding: 14px;
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.06);
  border: 1px solid #e2e8f0;
}

.session-top {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  align-items: flex-start;
}

.session-title {
  margin: 4px 0 0 0;
  font-size: 1.05rem;
  line-height: 1.35;
}

.session-meta,
.session-submeta {
  font-size: 0.9rem;
  color: #475569;
  line-height: 1.45;
}

.session-submeta {
  margin-top: 6px;
}

.favorite-btn {
  background: #fff;
  border: 1px solid #cbd5e1;
  border-radius: 10px;
  padding: 6px 10px;
  cursor: pointer;
  color: #0f172a;
}

.favorite-btn.active {
  background: #fef3c7;
  border-color: #f59e0b;
}

.paper {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid #e2e8f0;
}

.paper-title {
  font-weight: 700;
  line-height: 1.4;
}

.paper-title a {
  text-decoration: none;
  color: #0f172a;
}

.paper-title a:hover {
  text-decoration: underline;
}

.paper-meta {
  font-size: 0.9rem;
  color: #475569;
  line-height: 1.5;
  margin-top: 4px;
}

.timetable-grid {
  display: grid;
  gap: 10px;
}

.slot-block {
  background: #fff;
  border-radius: 16px;
  padding: 12px;
  border: 1px solid #e2e8f0;
}

.slot-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.room-grid {
  display: grid;
  gap: 8px;
}

.room-cell {
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  padding: 10px;
  background: #f8fafc;
  cursor: pointer;
}

.room-name {
  font-size: 0.9rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.list-header {
  font-weight: 700;
  color: #334155;
  margin: 2px 0 6px 0;
}

.pill {
  display: inline-block;
  padding: 3px 8px;
  border-radius: 999px;
  background: #e2e8f0;
  font-size: 0.8rem;
  color: #334155;
  margin-right: 6px;
}

@media (min-width: 768px) {
  #mainContent {
    padding: 18px;
  }

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

@media (min-width: 1100px) {
  .room-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.program-notice {
  background: #fff7ed;
  border-bottom: 1px solid #fed7aa;
  padding: 12px 14px;
  color: #431407;
}

.notice-title {
  font-weight: 800;
  margin-bottom: 8px;
}

.notice-grid {
  display: grid;
  gap: 6px;
  font-size: 0.92rem;
  line-height: 1.45;
}

.session-notice {
  margin-top: 8px;
  padding: 8px 10px;
  border-radius: 10px;
  background: #fef3c7;
  color: #78350f;
  font-size: 0.88rem;
  line-height: 1.45;
}

.special-pill {
  background: #fee2e2;
  color: #7f1d1d;
}

.maps-card h2 {
  margin-top: 0;
}

.map-list {
  display: grid;
  gap: 18px;
}

.map-list figure {
  margin: 0;
}

.map-list figcaption {
  font-weight: 700;
  margin-bottom: 8px;
  color: #334155;
}

.map-img {
  width: 100%;
  height: auto;
  display: block;
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  background: #fff;
}

.narrow-map {
  max-width: 520px;
  margin: 0 auto;
}

@media (min-width: 768px) {
  .notice-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1100px) {
  .notice-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}