/* ============================================================
   Question Everything — Self-Paced Course
   Track A course mode. Static, local-only progress.
   ============================================================ */

:root {
  --course-orange: #f97316;
  --course-orange-dark: #c2410c;
  --course-blue: #2563eb;
  --course-green: #15803d;
  --course-red: #b91c1c;
}

.course-home-page,
.course-unit-page {
  background:
    linear-gradient(90deg, rgba(79,70,229,.05) 1px, transparent 1px),
    linear-gradient(0deg, rgba(79,70,229,.05) 1px, transparent 1px),
    #fff;
  background-size: 28px 28px;
}

/* ============================================================
   Course home
   ============================================================ */
.course-hero {
  padding: 62px 0 52px;
  background:
    linear-gradient(135deg, #fff7ed 0%, #ffffff 50%, #eff6ff 100%);
  border-bottom: 1px solid var(--line);
}

.course-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(280px, .9fr);
  gap: 34px;
  align-items: center;
}

.course-hero h1 {
  margin: 0 0 14px;
  max-width: 700px;
  font-size: 2.6rem;
  line-height: 1.1;
}

.course-hero p {
  max-width: 640px;
  color: var(--ink-soft);
  font-size: 1.08rem;
}

.course-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 24px;
}

.course-hero-card {
  min-height: 330px;
  border: 2px solid #fed7aa;
  border-radius: 28px;
  background:
    linear-gradient(180deg, rgba(255,255,255,.8), rgba(255,247,237,.9)),
    repeating-linear-gradient(45deg, rgba(249,115,22,.08) 0 12px, transparent 12px 24px);
  box-shadow: 0 22px 60px rgba(194,65,12,.14);
  position: relative;
  overflow: hidden;
}

.scene-shelf {
  position: absolute;
  inset: 24px;
  display: grid;
  place-items: center;
}

.scene-shelf::after {
  content: "";
  position: absolute;
  left: 18%;
  right: 18%;
  bottom: 54px;
  height: 18px;
  border-radius: 999px;
  background: rgba(194,65,12,.14);
}

.scene-card {
  position: absolute;
  padding: 12px 15px;
  border: 2px solid var(--ink);
  border-radius: 14px;
  background: #fff;
  font-weight: 900;
  box-shadow: 5px 5px 0 rgba(23,32,51,.14);
}
.scene-card.one { left: 22px; top: 50px; transform: rotate(-9deg); color: var(--course-blue); }
.scene-card.two { right: 18px; bottom: 92px; transform: rotate(8deg); color: var(--course-green); }

.course-robo {
  width: 150px;
  height: 190px;
  position: relative;
  z-index: 2;
}
.robo-antenna {
  width: 8px;
  height: 34px;
  margin: 0 auto -2px;
  background: var(--ink);
  border-radius: 999px;
  position: relative;
}
.robo-antenna::before {
  content: "";
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--course-orange);
  border: 3px solid var(--ink);
  position: absolute;
  left: 50%;
  top: -18px;
  transform: translateX(-50%);
}
.robo-head {
  height: 112px;
  border: 4px solid var(--ink);
  border-radius: 32px;
  background: #dff5ff;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  align-items: center;
  justify-items: center;
  padding: 24px 26px 34px;
  box-shadow: 8px 8px 0 rgba(23,32,51,.12);
}
.robo-head span {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--ink);
}
.robo-head i {
  grid-column: 1 / 3;
  width: 52px;
  height: 12px;
  border-radius: 999px;
  background: var(--course-orange);
}
.robo-body {
  width: 104px;
  height: 58px;
  margin: 8px auto 0;
  border: 4px solid var(--ink);
  border-radius: 20px;
  background: #fff;
}

.course-stat-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.course-stat {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #fff;
  padding: 18px 20px;
}
.course-stat strong {
  display: block;
  font-size: 1.7rem;
  line-height: 1;
}
.course-stat span {
  color: var(--ink-soft);
  font-weight: 700;
  font-size: .88rem;
}

.course-note {
  margin-top: 22px;
  border-left: 5px solid var(--course-orange);
  border-radius: 0 18px 18px 0;
  background: #fff7ed;
  padding: 18px 22px;
  color: var(--ink);
}

.course-map {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 26px;
}

.course-unit-card {
  display: grid;
  grid-template-rows: auto auto 1fr auto;
  min-height: 230px;
  text-decoration: none;
  color: inherit;
  background: #fff;
  border: 2px solid var(--line);
  border-radius: 22px;
  padding: 20px;
  box-shadow: 0 8px 0 rgba(23,32,51,.04);
  transition: transform .16s ease, box-shadow .16s ease, border-color .16s ease;
}
.course-unit-card:hover {
  transform: translateY(-3px);
  border-color: #fdba74;
  box-shadow: 0 14px 32px rgba(194,65,12,.12);
}
.course-unit-card.done {
  border-color: #86efac;
  background: linear-gradient(180deg, #fff, #f0fdf4);
}
.course-unit-card.locked {
  border-color: #fed7aa;
  background: linear-gradient(180deg, #fff, #fff7ed);
}
.course-unit-card.locked:hover {
  border-color: var(--course-orange);
}
.course-unit-card .course-cap {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  color: var(--ink-soft);
  font-size: .76rem;
  font-weight: 900;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.course-unit-card h3 {
  margin: 10px 0 8px;
  font-size: 1.16rem;
  line-height: 1.25;
}
.course-unit-card p {
  margin: 0;
  color: var(--ink-soft);
  font-size: .92rem;
}
.course-unit-card .course-stars {
  margin-top: 16px;
  color: var(--course-orange);
  font-weight: 900;
  letter-spacing: 2px;
}
.course-unit-card .course-go {
  margin-top: 12px;
  font-weight: 900;
  color: var(--course-orange-dark);
}

/* ============================================================
   Unit player shell
   ============================================================ */
.course-player-top {
  position: sticky;
  top: 0;
  z-index: 60;
  border-bottom: 1px solid var(--line);
  background: rgba(255,255,255,.96);
  backdrop-filter: blur(10px);
}
.course-player-top .top-inner {
  display: grid;
  grid-template-columns: auto 1fr auto auto;
  gap: 14px;
  align-items: center;
  padding: 12px 22px;
  max-width: var(--maxw);
  margin: 0 auto;
}
.course-exit {
  color: var(--ink-soft);
  text-decoration: none;
  font-weight: 900;
  font-size: 1.45rem;
  line-height: 1;
}
.course-title-mini {
  min-width: 0;
  font-weight: 900;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.course-step-name {
  color: var(--ink-soft);
  font-size: .86rem;
  font-weight: 800;
}
.course-progress {
  height: 12px;
  background: var(--bg-soft);
  border-radius: 999px;
  overflow: hidden;
}
.course-progress i {
  display: block;
  height: 100%;
  width: 0;
  background: var(--course-orange);
  transition: width .22s ease;
}

.course-stage {
  max-width: 900px;
  min-height: calc(100vh - 78px);
  margin: 0 auto;
  padding: 42px 22px 120px;
}

.course-panel {
  background: #fff;
  border: 2px solid var(--line);
  border-radius: 28px;
  padding: 32px;
  box-shadow: 0 16px 44px rgba(23,32,51,.08);
}

.course-panel h1,
.course-panel h2 {
  margin-top: 0;
  line-height: 1.12;
}
.course-panel h1 { font-size: 2.25rem; }
.course-panel h2 { font-size: 1.8rem; }
.course-panel .course-lead {
  color: var(--ink-soft);
  font-size: 1.08rem;
}

.course-kicker {
  color: var(--course-orange-dark);
  font-size: .78rem;
  font-weight: 900;
  letter-spacing: .1em;
  text-transform: uppercase;
}

.course-bottom-nav {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 50;
  border-top: 1px solid var(--line);
  background: rgba(255,255,255,.96);
  backdrop-filter: blur(10px);
}
.course-bottom-nav .nav-inner {
  max-width: 900px;
  margin: 0 auto;
  padding: 14px 22px;
  display: flex;
  justify-content: space-between;
  gap: 14px;
}
.course-bottom-nav .btn {
  text-align: center;
}
.course-bottom-nav .btn[disabled] {
  opacity: .45;
  pointer-events: none;
}

/* ============================================================
   Section renderers
   ============================================================ */
.mission-scene {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 220px;
  gap: 24px;
  align-items: center;
}
.mission-scene-box {
  border: 2px dashed #fdba74;
  border-radius: 24px;
  background: #fff7ed;
  padding: 22px;
}
.robo-say {
  margin-top: 16px;
  border: 2px solid var(--ink);
  border-radius: 22px 22px 22px 6px;
  background: #fff;
  padding: 16px 18px;
  font-weight: 800;
}

.learn-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 22px;
}
.learn-card {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--bg-soft);
  padding: 18px;
}
.learn-card h3 {
  margin: 0 0 8px;
  font-size: 1.05rem;
}
.learn-card p {
  margin: 0;
  color: var(--ink-soft);
}

.play-list {
  display: grid;
  gap: 18px;
  margin-top: 22px;
}
.play-card {
  border: 2px solid var(--line);
  border-radius: 22px;
  background: #fff;
  padding: 22px;
}
.play-card.answered.good { border-color: #86efac; background: #f0fdf4; }
.play-card.answered.bad  { border-color: #fecaca; background: #fff5f5; }
.play-card h3 {
  margin: 0 0 12px;
  font-size: 1.08rem;
}
.play-prompt {
  font-weight: 800;
  font-size: 1.06rem;
  margin: 0 0 14px;
}
.play-options {
  display: grid;
  gap: 10px;
}
.play-option {
  width: 100%;
  text-align: left;
  border: 2px solid var(--line);
  border-radius: 16px;
  background: #fff;
  color: var(--ink);
  padding: 14px 16px;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}
.play-option:hover:not(:disabled) { border-color: var(--course-orange); }
.play-option.chosen { border-color: var(--course-orange); background: #fff7ed; }
.play-option.correct { border-color: var(--course-green); background: #dcfce7; }
.play-option.wrong { border-color: var(--course-red); background: #fee2e2; }
.play-option:disabled { cursor: default; }

.player-btn {
  width: 100%;
  margin-top: 12px;
  cursor: pointer;
  font-family: inherit;
  font-weight: 800;
  font-size: 1rem;
  padding: 13px 20px;
  border-radius: 999px;
  border: 2px solid transparent;
  background: var(--course-orange);
  color: #fff;
}
.player-btn:hover:not(:disabled) { background: var(--course-orange-dark); }
.player-btn:disabled {
  background: var(--line);
  color: #94a3b8;
  cursor: default;
}
.catch-next {
  background: var(--course-green);
}
.catch-next:hover:not(:disabled) {
  background: #166534;
}

.play-feedback {
  display: none;
  margin-top: 14px;
  border-radius: 16px;
  padding: 14px 16px;
  font-weight: 700;
}
.play-feedback.show { display: block; }
.play-feedback.good { background: #dcfce7; color: #14532d; }
.play-feedback.bad { background: #fee2e2; color: #7f1d1d; }

.tap-passage {
  border: 2px solid var(--line);
  border-radius: 18px;
  background: var(--bg-soft);
  padding: 18px;
  font-size: 1.12rem;
  line-height: 2;
}
.tap-w {
  cursor: pointer;
  border-radius: 7px;
  padding: 2px 4px;
  border: 0;
  border-bottom: 2px dashed transparent;
  background: transparent;
  color: inherit;
  font: inherit;
  line-height: inherit;
}
.tap-w:hover { background: #fff7ed; }
.tap-w.picked { background: #ffedd5; border-bottom-color: var(--course-orange); }
.tap-w.hit { background: #dcfce7; border-bottom-color: var(--course-green); }
.tap-w.miss { background: #fee2e2; border-bottom-color: var(--course-red); }
.tap-w.target { background: #fef9c3; border-bottom-color: #ca8a04; }
.tap-w:disabled { cursor: default; opacity: 1; }

.sort-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}
.sort-item {
  display: block;
  width: 100%;
  margin: 8px 0;
  border: 2px solid var(--line);
  border-radius: 14px;
  background: #fff;
  color: var(--ink);
  padding: 11px 12px;
  font: inherit;
  font-weight: 700;
  cursor: default;
}
.sort-item strong {
  display: block;
  margin-bottom: 10px;
}
.sort-item.active { border-color: var(--course-orange); background: #fff7ed; }
.sort-item.good { border-color: var(--course-green); background: #dcfce7; }
.sort-item.bad { border-color: var(--course-red); background: #fee2e2; }

:where(.course-unit-card, .course-exit, .play-option, .tap-w, .player-btn, .course-bottom-nav .btn):focus-visible {
  outline: 3px solid var(--course-blue);
  outline-offset: 3px;
}

.reflect-box {
  border-left: 5px solid var(--course-blue);
  border-radius: 0 20px 20px 0;
  background: #eff6ff;
  padding: 20px 22px;
  margin-top: 18px;
}
.reflection-space {
  min-height: 110px;
  border: 2px dashed #93c5fd;
  border-radius: 18px;
  background: rgba(255,255,255,.65);
  padding: 16px;
  color: var(--ink-soft);
  font-weight: 700;
}
.mentor-prompt {
  margin-top: 18px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #fff;
  padding: 16px 18px;
}

.promise-badge {
  width: 96px;
  height: 96px;
  border: 4px solid var(--ink);
  border-radius: 28px;
  display: grid;
  place-items: center;
  margin: 0 auto 18px;
  background: #ffedd5;
  color: var(--course-orange-dark);
  font-size: 2.7rem;
  font-weight: 900;
  box-shadow: 8px 8px 0 rgba(23,32,51,.12);
}
.mission-card {
  margin-top: 18px;
  border: 2px solid #fed7aa;
  border-radius: 20px;
  background: #fff7ed;
  padding: 18px 20px;
  text-align: left;
}
.course-upgrade-card {
  margin-top: 28px;
  border: 2px solid #fed7aa;
  border-radius: 22px;
  background: #fff7ed;
  padding: 22px;
}
.course-upgrade-card h2 {
  margin-bottom: 8px;
}
.course-upgrade-card p {
  max-width: 620px;
  margin: 0 auto;
  color: var(--ink-soft);
}
.completion-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 22px;
}
.completion-box {
  background: var(--bg-soft);
  border-radius: 18px;
  padding: 16px;
  text-align: center;
}
.completion-box strong {
  display: block;
  font-size: 1.45rem;
}

.course-loading,
.course-error {
  max-width: 560px;
  margin: 70px auto;
  border: 1px solid #fde68a;
  border-radius: 20px;
  background: #fffbeb;
  padding: 24px;
}
.storage-note {
  margin-top: 16px;
  color: var(--ink-soft);
  font-size: .9rem;
  text-align: center;
}

@media (max-width: 860px) {
  .course-hero-grid,
  .mission-scene,
  .learn-grid,
  .course-map {
    grid-template-columns: 1fr;
  }
  .course-hero-card { min-height: 280px; }
}

@media (max-width: 640px) {
  .course-hero h1 { font-size: 2rem; }
  .course-panel { padding: 22px; border-radius: 22px; }
  .course-panel h1 { font-size: 1.72rem; }
  .course-panel h2 { font-size: 1.42rem; }
  .course-stat-row,
  .completion-grid,
  .sort-grid {
    grid-template-columns: 1fr;
  }
  .course-player-top .top-inner {
    grid-template-columns: auto 1fr auto;
  }
  .course-step-name { display: none; }
  .course-bottom-nav .nav-inner {
    flex-direction: column-reverse;
  }
  .course-bottom-nav .btn {
    width: 100%;
  }
}