/* UG-UI-20261015-02 · Traditional / AI study rooms.
 * Scoped layout; colors follow core/dream-theme.css, including dark mode. */
.study-rooms-intro { margin: 6px 0 24px; color: var(--muted); font-size: 15px; line-height: 1.7; }
.study-rooms-intro p { margin: 0; }
.study-room-list { display: grid; gap: 18px; }
.phone .study-room-card {
  position: relative;
  display: grid;
  grid-template-columns: 76px minmax(0, 1fr) 28px;
  align-items: center;
  gap: 22px;
  width: 100%;
  min-height: 170px;
  margin: 0;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 28px;
  background: var(--dream-surface);
  color: var(--ink);
  text-align: left;
  box-shadow: var(--dream-shadow);
  cursor: pointer;
  overflow: hidden;
  transition: border-color .2s, transform .2s, box-shadow .2s;
}
.phone .study-room-card--ai { background: var(--dream-gradient); }
.study-room-card::after {
  content: "";
  position: absolute;
  right: -45px;
  top: -68px;
  width: 200px;
  height: 200px;
  border: 1px solid var(--line);
  border-radius: 50%;
  box-shadow: 0 0 0 22px rgba(130,171,234,.045), 0 0 0 44px rgba(130,171,234,.035);
  pointer-events: none;
}
.study-room-card > * { position: relative; z-index: 1; }
.phone .study-room-card:hover { border-color: var(--dream-border); transform: translateY(-2px); box-shadow: 0 14px 30px rgba(63,101,169,.12); }
.study-room-icon {
  width: 76px;
  height: 76px;
  border-radius: 24px;
  display: grid;
  place-items: center;
  background: var(--dream-soft);
  color: var(--button-blue-text);
  box-shadow: inset 0 0 0 1px var(--line);
}
.study-room-icon svg { width: 44px; height: 44px; }
.study-room-copy { display: grid; gap: 7px; min-width: 0; }
.phone .study-room-copy strong { font-size: 23px; font-weight: 700; line-height: 1.4; }
.phone .study-room-copy small { color: var(--muted); font-size: 13px; line-height: 1.7; margin: 0; }
.study-room-tag { color: var(--button-blue-text); font-size: 11px; letter-spacing: .07em; }
.study-room-arrow { color: var(--button-blue-text); font-size: 24px; }
.phone .study-room-screen {
  min-height: 0;
  padding: 0;
  border-radius: 24px;
  background: transparent;
  color: var(--ink);
}
.study-room-intro { margin: 6px 0 24px; font-size: 15px; color: var(--muted); line-height: 1.7; }
.study-workspace { display: grid; gap: 18px; align-items: start; }
.study-workspace > *, .study-environment > * { min-width: 0; }
.study-timer-panel,
.study-goal-panel,
.study-checkin-panel,
.study-settings-block {
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: 24px;
  background: var(--dream-surface);
  box-shadow: var(--dream-shadow);
}
.study-environment { display: grid; gap: 18px; }
.study-workspace h3 { margin: 0 0 12px; font-size: 16px; font-weight: 700; line-height: 1.5; }
.phone .study-workspace .helper { color: var(--muted); font-size: 13px; margin-bottom: 16px; }
.phone .study-workspace .study-ai-note { font-size: 12px; }
.study-timer-panel { background: var(--dream-gradient); }
.study-room-screen .study-timer { padding: 30px 0 32px; gap: 14px; text-align: center; }
.study-room-screen .study-timer strong {
  color: var(--ink);
  font-size: clamp(52px, 9vw, 76px);
  line-height: 1.1;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  letter-spacing: -.045em;
}
.study-timer span { color: var(--muted); font-size: 13px; }
.study-timer-caption { letter-spacing: .08em; }
.study-duration-options { justify-content: center; gap: 8px; margin: 8px 0 22px; }
.study-duration-options .chip { padding: 10px 12px; font-size: 12px; }
.study-timer-actions { display: grid; grid-template-columns: 1.4fr 1fr; gap: 12px; }
.study-timer-actions :is(.primary, .secondary) { margin: 0; min-width: 0; font-size: 14px; }
.study-settings-block .chips { margin: 0; gap: 8px; }
.study-settings-block .chip { font-size: 12px; padding: 10px 12px; }
.study-workspace input { background: var(--paper); color: var(--ink); border-color: var(--line); border-radius: 14px; min-width: 0; }
.study-workspace input::placeholder { color: var(--muted); }
.study-checkin-list:empty { display: none; }
.study-checkin-list { margin-top: 16px; display: grid; gap: 8px; }
.phone .study-checkin-record { margin: 0; padding: 12px 14px; background: var(--dream-soft); border-radius: 14px; box-shadow: none; font-size: 13px; line-height: 1.7; overflow-wrap: anywhere; }
.study-checkin-reminder { color: var(--button-blue-text); background: var(--dream-soft); padding: 12px; border-radius: 12px; font-size: 13px; }
/* Background choices tint the timer only, so controls remain legible in both app themes. */
.phone .study-room-screen.theme-paper .study-timer-panel { background: linear-gradient(145deg, #f9fbff, #ecf3ff 75%, #e8edff); }
.phone .study-room-screen.theme-forest .study-timer-panel { background: linear-gradient(145deg, #edf8fc, #e1eff6 60%, #e5f1ed); }
.phone .study-room-screen.theme-night .study-timer-panel { background: radial-gradient(ellipse at 75% 15%, #3f5784, transparent 70%), #24385d; --ink: #f1f5ff; --muted: #c3d3ed; }
.phone.theme-dark .study-room-screen.theme-paper .study-timer-panel { background: linear-gradient(145deg, #243b5d, #28365a); }
.phone.theme-dark .study-room-screen.theme-forest .study-timer-panel { background: linear-gradient(145deg, #203d51, #254758); }
@media (min-width: 720px) {
  .study-workspace { grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); }
  .study-timer-panel { grid-column: 1; grid-row: 1 / span 2; }
  .study-environment { grid-column: 2; }
  .study-goal-panel { grid-column: 2; grid-row: 1; }
  .study-checkin-panel { grid-column: 1 / -1; }
}
@media (max-width: 479px) {
  .phone .study-room-card { padding: 22px 18px; gap: 14px; grid-template-columns: 58px minmax(0, 1fr) 20px; min-height: 152px; border-radius: 24px; }
  .study-room-icon { width: 58px; height: 58px; border-radius: 20px; }
  .study-room-icon svg { width: 36px; height: 36px; }
  .phone .study-room-copy strong { font-size: 20px; }
  .phone .study-room-copy small { font-size: 11px; }
  .study-timer-panel, .study-goal-panel, .study-checkin-panel, .study-settings-block { padding: 20px 16px; }
  .study-duration-options { gap: 6px; }
  .study-duration-options .chip { padding: 10px; }
}