/* Shrimp: playful, friendly. Coral is you and your progress; mat teal is learning. */

:root {
  --coral: #EF6A4D;
  --coral-dark: #C94A33;
  --coral-tint: #FEEDE8;
  --coral-halo: #FBD9D0;
  --teal: #3AA6B9;
  --teal-dark: #23808F;
  --teal-tint: #DDF0F3;
  --ink: #1B2A3A;
  --text: #1B2A3A;
  --text-2: #4E6274;
  --muted: #8A9BAA;
  --line: #DCE4EA;
  --ground: #F4F7F9;
  --surface: #FFFFFF;
  --locked: #E3EAEF;
  --locked-dark: #C5D0D8;
  --mat: #E3EAEF;
  --mat-edge: #C5D0D8;
  --green: #3FB26A;
  --green-dark: #2E8C52;
  --green-tint: #DDF5E5;
  --red: #E0475B;
  --red-dark: #B8323F;
  --red-tint: #FBE1E4;
  --thumb: #1B2A3A;
  --display: 'Fredoka', 'Trebuchet MS', 'Segoe UI', sans-serif;
  --body: 'Nunito', 'Trebuchet MS', 'Segoe UI', sans-serif;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --coral-tint: #3A2320;
    --coral-halo: #5A2E27;
    --teal-tint: #12343B;
    --text: #F1F7FB;
    --text-2: #B9C7D2;
    --muted: #7F92A1;
    --line: #2A3B47;
    --ground: #0F181E;
    --surface: #17242C;
    --locked: #223039;
    --locked-dark: #16222A;
    --mat: #223039;
    --mat-edge: #2E404C;
    --green-tint: #173425;
    --red-tint: #3E1B22;
    --thumb: #0B1218;
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --coral-tint: #3A2320;
  --coral-halo: #5A2E27;
  --teal-tint: #12343B;
  --text: #F1F7FB;
  --text-2: #B9C7D2;
  --muted: #7F92A1;
  --line: #2A3B47;
  --ground: #0F181E;
  --surface: #17242C;
  --locked: #223039;
  --locked-dark: #16222A;
  --mat: #223039;
  --mat-edge: #2E404C;
  --green-tint: #173425;
  --red-tint: #3E1B22;
  --thumb: #0B1218;
  color-scheme: dark;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--ground);
  color: var(--text);
  font-family: var(--body);
  font-size: 16px;
  -webkit-tap-highlight-color: transparent;
}

#app {
  max-width: 480px;
  margin: 0 auto;
  min-height: 100vh;
  background: var(--surface);
  display: flex;
  flex-direction: column;
  box-shadow: 0 0 32px rgba(0,0,0,0.06);
}

@media (min-width: 520px) {
  #app { background: var(--ground); }
  .view { background: var(--ground); }
}

.hidden { display: none !important; }
.icon svg, .icon-btn svg { width: 100%; height: 100%; display: block; }

h1, h2, .display { font-family: var(--display); font-weight: 600; margin: 0; text-wrap: balance; }
.eyebrow { font-size: 12px; font-weight: 800; letter-spacing: 0.1em; color: var(--teal-dark); text-transform: uppercase; }

button { font-family: inherit; color: inherit; }
button:focus-visible, .lesson-node:focus-visible, .choice-btn:focus-visible {
  outline: 3px solid var(--teal);
  outline-offset: 3px;
}

/* ---------- Buttons ---------- */

.primary-btn {
  width: 100%;
  height: 56px;
  border: none;
  border-radius: 16px;
  background: var(--coral);
  box-shadow: 0 5px 0 var(--coral-dark);
  color: #FFFFFF;
  font-family: var(--display);
  font-size: 19px;
  font-weight: 600;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: transform 0.06s ease, box-shadow 0.06s ease;
}
.primary-btn:active:not(:disabled) { transform: translateY(4px); box-shadow: 0 1px 0 var(--coral-dark); }
.primary-btn:disabled {
  background: var(--locked);
  box-shadow: 0 5px 0 var(--locked-dark);
  color: var(--muted);
  cursor: not-allowed;
}
.primary-btn.teal { background: var(--teal); box-shadow: 0 5px 0 var(--teal-dark); }
.primary-btn.teal:active:not(:disabled) { box-shadow: 0 1px 0 var(--teal-dark); }

.secondary-btn {
  width: 100%;
  height: 52px;
  border: 2.5px solid var(--line);
  border-radius: 16px;
  background: var(--surface);
  color: var(--text-2);
  font-family: var(--display);
  font-size: 17px;
  font-weight: 600;
  cursor: pointer;
}

.icon-btn {
  width: 44px;
  height: 44px;
  padding: 10px;
  background: none;
  border: none;
  color: var(--muted);
  cursor: pointer;
  border-radius: 12px;
  flex-shrink: 0;
}

/* ---------- Top bar & belt card ---------- */

.top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px 12px;
  position: sticky;
  top: 0;
  background: var(--ground);
  z-index: 5;
}
.brand { display: flex; align-items: center; gap: 8px; font-family: var(--display); font-size: 22px; font-weight: 700; }
.brand svg { width: 34px; height: 28px; }
.stats { display: flex; align-items: center; gap: 14px; }
.stat { display: flex; align-items: center; gap: 4px; font-weight: 800; font-size: 15px; min-height: 44px; }
.stat .icon { width: 20px; height: 20px; }
.stat-streak { color: var(--coral); }
.stat-xp { color: var(--teal-dark); }

.belt-card {
  margin: 0 20px;
  background: var(--surface);
  border-radius: 20px;
  padding: 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  box-shadow: 0 2px 0 var(--line);
}
.belt-card-head { display: flex; align-items: baseline; justify-content: space-between; }
.belt-card-head h2 { font-size: 22px; }
.belt-card-head .stripes-label { font-size: 13px; font-weight: 800; color: var(--muted); }
.belt-card-note { font-size: 13px; font-weight: 600; color: var(--text-2); }

.belt {
  position: relative;
  height: 24px;
  border: 1.5px solid;
  border-radius: 6px;
}
.belt-bar {
  position: absolute;
  right: 12%;
  top: 0;
  bottom: 0;
  width: 26%;
  background: #2A2A2A;
  display: flex;
  align-items: stretch;
  justify-content: space-evenly;
  padding: 0 6px;
}
.belt-stripe { width: 6px; background: #4A4A4A; }
.belt-stripe.on { background: #FFFFFF; }

/* ---------- Sound toggle & account ---------- */

.sound-btn { color: var(--muted); padding: 11px; margin-right: -8px; }
.sound-btn.on { color: var(--teal-dark); }
.account-btn { color: var(--muted); padding: 11px; margin-right: -8px; position: relative; }
.account-btn.signed-in { color: var(--teal-dark); }
.account-btn.signed-in::after { content: ""; position: absolute; right: 8px; top: 8px; width: 8px; height: 8px; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 2px var(--ground); }

.account-card {
  background: var(--surface);
  border-radius: 20px;
  padding: 18px;
  box-shadow: 0 2px 0 var(--line);
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.account-card h2 { font-size: 19px; }
.account-card p { margin: 0; font-size: 14px; font-weight: 600; color: var(--text-2); line-height: 1.45; }
.account-mascot { display: flex; justify-content: center; }
.account-mascot svg { width: 120px; height: 100px; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field label { font-size: 12px; font-weight: 800; letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); }
.field input {
  height: 52px;
  padding: 0 14px;
  border: 2.5px solid var(--line);
  border-radius: 14px;
  background: var(--surface);
  color: var(--text);
  font-family: var(--body);
  font-size: 16px;
  font-weight: 700;
}
.field input:focus { outline: none; border-color: var(--teal); }
.field-row { display: flex; gap: 10px; align-items: flex-end; }
.field-row .field { flex: 1; }
.field-row .secondary-btn { width: auto; padding: 0 18px; height: 52px; flex-shrink: 0; }
.account-note { font-size: 13px; font-weight: 700; color: var(--muted); display: flex; align-items: center; gap: 8px; }
.account-note svg { width: 18px; height: 18px; flex-shrink: 0; }
.account-note.ok { color: var(--green-dark); }
.account-note.err { color: var(--red-dark); }
.account-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; font-size: 15px; font-weight: 700; }
.account-row .muted { color: var(--muted); font-weight: 600; }
.provider-btn { display: flex; align-items: center; justify-content: center; gap: 10px; }
.provider-btn svg { width: 20px; height: 20px; }
.danger-btn { color: var(--red-dark); border-color: var(--red-tint); }

.toast {
  position: fixed;
  left: 50%;
  bottom: 28px;
  transform: translateX(-50%);
  z-index: 60;
  max-width: calc(100% - 40px);
  padding: 12px 18px;
  border-radius: 999px;
  background: var(--ink);
  color: #FFFFFF;
  font-size: 14px;
  font-weight: 800;
  box-shadow: 0 6px 20px rgba(0,0,0,0.18);
  animation: rise-in 0.25s ease-out;
}

/* ---------- Streak celebration overlay ---------- */

.overlay {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px 20px;
  background: var(--ground);
  animation: overlay-in 0.25s ease-out;
}
.overlay-card {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 400px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}
.streak-mascot { height: 150px; display: flex; align-items: flex-end; justify-content: center; }
.streak-mascot svg { width: 180px; height: 150px; animation: mascot-pop 0.6s cubic-bezier(0.34, 1.56, 0.64, 1) both, mascot-wiggle 0.9s ease-in-out 0.65s 2; transform-origin: 50% 80%; }
.overlay.milestone .streak-mascot svg { animation: mascot-pop 0.6s cubic-bezier(0.34, 1.56, 0.64, 1) both, mascot-bounce 0.7s ease-in-out 0.65s 3; }
.streak-count {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--coral);
  font-family: var(--display);
  font-size: 84px;
  font-weight: 700;
  line-height: 1;
  font-variant-numeric: tabular-nums;
  animation: count-in 0.5s cubic-bezier(0.34, 1.56, 0.64, 1) 0.3s both;
}
.streak-count .icon { width: 56px; height: 56px; display: flex; animation: flame-pulse 1.2s ease-in-out 0.8s infinite; }
.overlay h2 { font-size: 28px; animation: rise-in 0.4s ease-out 0.5s both; }
.streak-msg { margin: 0; color: var(--text-2); font-weight: 600; font-size: 15px; line-height: 1.45; max-width: 320px; animation: rise-in 0.4s ease-out 0.65s both; }
.week.big { gap: 10px; margin: 8px 0 14px; animation: rise-in 0.4s ease-out 0.8s both; }
.week.big .day .dot { width: 32px; height: 32px; }
.week.big .day .dot svg { width: 18px; height: 18px; }
.week.big .day.active .dot { animation: dot-pop 0.35s cubic-bezier(0.34, 1.56, 0.64, 1) both; animation-delay: calc(0.9s + var(--i) * 0.08s); }
.week.big .day .letter { font-size: 11px; }
.overlay .primary-btn { max-width: 320px; animation: rise-in 0.4s ease-out 1s both; }

.confetti { position: absolute; inset: 0; overflow: hidden; pointer-events: none; }
.confetti i {
  position: absolute;
  top: -12px;
  width: 10px;
  height: 14px;
  border-radius: 2px;
  opacity: 0;
  animation: confetti-fall var(--d) ease-in var(--delay) forwards;
}

@keyframes overlay-in { from { opacity: 0; } to { opacity: 1; } }
@keyframes mascot-pop { from { transform: scale(0.2) rotate(-20deg); opacity: 0; } to { transform: scale(1) rotate(0); opacity: 1; } }
@keyframes mascot-wiggle { 0%, 100% { transform: rotate(0); } 25% { transform: rotate(-8deg) translateX(-6px); } 75% { transform: rotate(8deg) translateX(6px); } }
@keyframes mascot-bounce { 0%, 100% { transform: translateY(0) scale(1); } 40% { transform: translateY(-26px) scale(1.06, 0.94); } 60% { transform: translateY(0) scale(0.96, 1.04); } }
@keyframes count-in { from { transform: scale(0.4); opacity: 0; } to { transform: scale(1); opacity: 1; } }
@keyframes flame-pulse { 0%, 100% { transform: scale(1); } 50% { transform: scale(1.18); } }
@keyframes rise-in { from { transform: translateY(14px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }
@keyframes dot-pop { from { transform: scale(0.3); } to { transform: scale(1); } }
@keyframes confetti-fall {
  0% { opacity: 1; transform: translate3d(0, 0, 0) rotate(0); }
  100% { opacity: 0.9; transform: translate3d(var(--x), 105vh, 0) rotate(var(--r)); }
}

/* ---------- Today (daily goal + streak) ---------- */

.today-card {
  margin: 12px 20px 0;
  background: var(--surface);
  border-radius: 20px;
  padding: 14px 18px 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  box-shadow: 0 2px 0 var(--line);
}
.today-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.today-xp { font-family: var(--display); font-size: 22px; font-weight: 600; margin-top: 2px; font-variant-numeric: tabular-nums; }
.today-xp strong { color: var(--coral); font-weight: 700; }
.goal-btn {
  min-height: 44px;
  padding: 0 14px;
  border-radius: 999px;
  border: 2px solid var(--line);
  background: var(--surface);
  color: var(--text-2);
  font-size: 13px;
  font-weight: 800;
  cursor: pointer;
}
.goal-track { height: 12px; border-radius: 6px; background: var(--line); overflow: hidden; }
.goal-fill { height: 100%; border-radius: 6px; background: var(--coral); transition: width 0.4s ease; }
.goal-fill.met { background: var(--green); }
.today-foot { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.week { display: flex; gap: 6px; }
.day { display: flex; flex-direction: column; align-items: center; gap: 3px; }
.day .dot {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--locked);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #FFFFFF;
  box-sizing: border-box;
}
.day .dot svg { width: 14px; height: 14px; }
.day.active .dot { background: var(--coral); }
.day.goal .dot { background: var(--green); }
.day.today .dot { box-shadow: 0 0 0 2px var(--surface), 0 0 0 4px var(--teal); }
.day .letter { font-size: 10px; font-weight: 800; color: var(--muted); }
.streak-note { font-size: 13px; font-weight: 800; color: var(--coral); white-space: nowrap; }

/* ---------- Practice ---------- */

.practice-card {
  width: calc(100% - 40px);
  margin: 12px 20px 0;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-radius: 18px;
  border: none;
  background: var(--teal);
  box-shadow: 0 5px 0 var(--teal-dark);
  color: #FFFFFF;
  text-align: left;
  cursor: pointer;
  transition: transform 0.06s ease, box-shadow 0.06s ease;
}
.practice-card:active:not(:disabled) { transform: translateY(4px); box-shadow: 0 1px 0 var(--teal-dark); }
.practice-card.disabled { background: var(--locked); box-shadow: 0 5px 0 var(--locked-dark); color: var(--muted); cursor: not-allowed; }
.practice-icon { position: relative; width: 40px; height: 40px; flex-shrink: 0; }
.practice-icon svg { width: 40px; height: 40px; }
.practice-icon .badge {
  position: absolute;
  top: -6px;
  right: -8px;
  min-width: 20px;
  height: 20px;
  padding: 0 6px;
  border-radius: 10px;
  background: var(--coral);
  color: #FFFFFF;
  font-size: 11px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 0 2px var(--teal);
}
.practice-card.disabled .badge { display: none; }
.practice-text { flex: 1; display: flex; flex-direction: column; gap: 2px; }
.practice-title { font-family: var(--display); font-size: 18px; font-weight: 600; }
.practice-sub { font-size: 12px; font-weight: 700; opacity: 0.9; line-height: 1.35; }
.practice-go { width: 24px; height: 24px; flex-shrink: 0; }
.practice-go svg { width: 24px; height: 24px; }

.practice-tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--teal-tint);
  color: var(--teal-dark);
  font-size: 12px;
  font-weight: 800;
}
.practice-tag svg { width: 16px; height: 16px; }
.eyebrow.weak { color: var(--coral-dark); }

.goal-banner {
  width: 100%;
  padding: 12px 16px;
  border-radius: 16px;
  background: var(--teal-tint);
  color: var(--teal-dark);
  font-weight: 700;
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
  text-align: left;
}
.goal-banner svg { width: 22px; height: 22px; flex-shrink: 0; }

/* ---------- Path ---------- */

#view-path { background: var(--ground); min-height: 100vh; }
.path-container { padding: 8px 0 80px; display: flex; flex-direction: column; }

.unit {
  position: relative;
  padding: 22px 0 8px;
}
.unit-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin: 0 20px 6px;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--teal-tint);
  color: var(--teal-dark);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.unit.locked .unit-chip { background: var(--locked); color: var(--muted); }
.unit-belt-chip { margin-left: 20px; }

.unit-nodes { position: relative; }
.unit-path {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.node-row {
  display: flex;
  min-height: 100px;
  align-items: flex-start;
  padding-top: 6px;
}
.node-row.c { justify-content: center; }
.node-row.l { justify-content: flex-start; padding-left: 15%; }
.node-row.r { justify-content: flex-end; padding-right: 15%; }

.node-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  width: 110px;
  position: relative;
  z-index: 1;
}
.lesson-node {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  border: none;
  background: var(--coral);
  box-shadow: 0 6px 0 var(--coral-dark);
  color: #FFFFFF;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  padding: 0;
  transition: transform 0.08s ease, box-shadow 0.08s ease;
}
.lesson-node svg { width: 28px; height: 28px; }
.lesson-node:active { transform: translateY(4px); box-shadow: 0 2px 0 var(--coral-dark); }
.lesson-node.learn { background: var(--teal); box-shadow: 0 6px 0 var(--teal-dark); }
.lesson-node.learn:active { box-shadow: 0 2px 0 var(--teal-dark); }
.lesson-node.current { box-shadow: 0 6px 0 var(--coral-dark), 0 0 0 7px var(--coral-halo); }
.lesson-node.learn.current { box-shadow: 0 6px 0 var(--teal-dark), 0 0 0 7px var(--teal-tint); }
.lesson-node.locked {
  background: var(--locked);
  box-shadow: 0 6px 0 var(--locked-dark);
  color: var(--muted);
  cursor: not-allowed;
}
.lesson-node.locked:active { transform: none; }
.node-label {
  font-size: 12px;
  font-weight: 800;
  color: var(--text-2);
  text-align: center;
  line-height: 1.25;
  max-width: 110px;
  background: var(--ground);
  padding: 2px 6px;
  border-radius: 8px;
}
.node-wrap.locked .node-label { color: var(--muted); }
.node-stars { font-size: 11px; font-weight: 800; color: var(--coral); display: flex; gap: 1px; }
.node-stars svg { width: 12px; height: 12px; }

.callout {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 20px 4px;
  position: relative;
  z-index: 1;
}
.callout svg { width: 54px; height: 44px; flex-shrink: 0; }
.callout-bubble {
  background: var(--surface);
  border: 2px solid var(--line);
  border-radius: 14px;
  padding: 8px 12px;
  font-size: 13px;
  font-weight: 700;
  line-height: 1.3;
}

.belt-divider {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 34px 20px 0;
}
.belt-divider .belt-chip { margin-top: 0; }
.belt-divider-line { flex: 1; height: 2px; background: var(--line); border-radius: 1px; }

.promo-card {
  margin: 30px 20px 0;
  padding: 18px;
  border-radius: 20px;
  background: var(--surface);
  box-shadow: 0 2px 0 var(--line);
  display: flex;
  gap: 14px;
  align-items: center;
}
.promo-card svg { width: 72px; height: 60px; flex-shrink: 0; }
.promo-card h3 { font-family: var(--display); font-size: 18px; margin: 0 0 4px; }
.promo-card p { margin: 0; font-size: 13px; color: var(--text-2); line-height: 1.4; }

/* ---------- Learn ---------- */

#view-learn { display: flex; flex-direction: column; min-height: 100vh; }
.learn-header {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 18px 20px 0 12px;
}
.learn-title { flex: 1; display: flex; flex-direction: column; gap: 2px; padding-top: 4px; }
.learn-title h1 { font-size: 30px; line-height: 1.1; }
.belt-chip {
  margin-top: 8px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1.5px solid var(--line);
  background: var(--surface);
  font-size: 12px;
  font-weight: 800;
  color: var(--text-2);
  white-space: nowrap;
}
.belt-chip .swatch { width: 18px; height: 8px; border-radius: 2px; border: 1px solid; display: inline-block; }

.learn-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding: 14px 20px 20px;
}
.learn-intro { font-size: 15px; font-weight: 600; color: var(--text-2); line-height: 1.45; text-wrap: pretty; }

.video-list { display: flex; flex-direction: column; gap: 10px; }
.video-card {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--surface);
  border-radius: 16px;
  padding: 8px;
  box-shadow: 0 2px 0 var(--line);
  border: none;
  width: 100%;
  text-align: left;
  cursor: pointer;
}
.video-thumb {
  position: relative;
  width: 100px;
  height: 60px;
  border-radius: 10px;
  background: var(--thumb);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #FFFFFF;
  overflow: hidden;
}
.video-thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.video-thumb .play { position: absolute; width: 26px; height: 26px; }
.video-duration {
  position: absolute;
  right: 6px;
  bottom: 6px;
  padding: 2px 6px;
  border-radius: 6px;
  background: rgba(0,0,0,0.6);
  color: #FFFFFF;
  font-size: 11px;
  font-weight: 800;
}
.video-text { flex: 1; display: flex; flex-direction: column; gap: 3px; min-width: 0; }
.video-title { font-size: 15px; font-weight: 800; line-height: 1.25; }
.video-channel { font-size: 13px; font-weight: 600; color: var(--muted); }
.video-status {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 2.5px solid var(--line);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #FFFFFF;
}
.video-status.watched { background: var(--teal); border-color: var(--teal); }
.video-status svg { width: 16px; height: 16px; }
.video-card.placeholder { cursor: default; }
.video-card.placeholder .video-thumb { background: var(--locked); color: var(--muted); }

.video-player {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: 16px;
  overflow: hidden;
  background: var(--thumb);
}
.video-player iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.video-player.blocked { display: flex; align-items: center; justify-content: center; padding: 20px; aspect-ratio: auto; min-height: 120px; background: var(--locked); }
.blocked-msg { display: flex; gap: 12px; align-items: center; color: var(--text-2); font-size: 14px; line-height: 1.4; }
.blocked-msg svg { width: 32px; height: 32px; flex-shrink: 0; color: var(--muted); }
.open-youtube {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  align-self: flex-start;
  margin-top: -8px;
  min-height: 44px;
  font-size: 13px;
  font-weight: 800;
  color: var(--teal-dark);
  text-decoration: none;
}
.open-youtube svg { width: 16px; height: 16px; }

.key-ideas { display: flex; flex-direction: column; gap: 10px; }
.key-ideas h2 { font-size: 19px; }
.key-ideas ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.key-ideas li {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  font-size: 14px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--text-2);
}
.key-ideas li::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--teal);
  margin-top: 6px;
  flex-shrink: 0;
}
.key-ideas li.has-fig::before { content: none; }
.key-idea-fig { width: 64px; flex-shrink: 0; border-radius: 10px; overflow: hidden; background: var(--surface); }
.key-idea-fig svg { display: block; }

.sticky-footer {
  position: sticky;
  bottom: 0;
  padding: 12px 20px 22px;
  background: var(--ground);
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: center;
}
.footer-note { font-size: 12px; font-weight: 700; color: var(--muted); }

/* ---------- Lesson ---------- */

#view-lesson { display: flex; flex-direction: column; min-height: 100vh; }

.lesson-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 18px 16px 8px 12px;
}
.progress-track { flex: 1; height: 14px; border-radius: 7px; background: var(--line); overflow: hidden; }
.progress-fill { height: 100%; width: 0%; border-radius: 7px; background: var(--coral); transition: width 0.3s ease; }
.hearts { display: flex; align-items: center; gap: 2px; color: var(--red); }
.hearts svg { width: 20px; height: 20px; }

.question-container {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 12px 20px 0;
}
.question-prompt { font-family: var(--display); font-size: 24px; font-weight: 600; line-height: 1.2; text-wrap: balance; }
.teach-body { color: var(--text-2); font-weight: 600; font-size: 16px; line-height: 1.5; margin: 0; }

.choice-list { display: flex; flex-direction: column; gap: 10px; }
.choice-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.choice-btn {
  min-height: 56px;
  text-align: left;
  padding: 14px 16px;
  border: 2.5px solid var(--line);
  border-radius: 16px;
  background: var(--surface);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.3;
  cursor: pointer;
  color: var(--text);
}
.choice-grid .choice-btn { min-height: 64px; text-align: center; justify-content: center; display: flex; align-items: center; font-size: 17px; font-weight: 800; }
.choice-btn.selected { border-color: var(--coral); background: var(--coral-tint); color: var(--coral-dark); }
.choice-btn.correct { border-color: var(--green); background: var(--green-tint); color: var(--green-dark); }
.choice-btn.incorrect { border-color: var(--red); background: var(--red-tint); color: var(--red-dark); }
.choice-btn.disabled { cursor: default; }

.illustration-card {
  background: var(--surface);
  border-radius: 20px;
  padding: 14px 14px 10px;
  box-shadow: 0 2px 0 var(--line);
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.illustration-card svg { display: block; }
.legend { display: flex; gap: 14px; padding: 0 4px; }
.legend span { display: flex; align-items: center; gap: 6px; font-size: 12px; font-weight: 800; color: var(--text-2); }
.legend i { width: 10px; height: 10px; border-radius: 50%; display: inline-block; }

.sequence-answer {
  min-height: 60px;
  border: 2.5px dashed var(--locked-dark);
  border-radius: 16px;
  padding: 10px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.sequence-answer .placeholder { color: var(--muted); font-size: 14px; font-weight: 700; text-align: center; padding: 8px; }
.sequence-pool { display: flex; flex-direction: column; gap: 8px; }
.sequence-step {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 48px;
  padding: 10px 12px;
  border-radius: 12px;
  border: 2.5px solid var(--line);
  background: var(--surface);
  cursor: pointer;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.3;
  text-align: left;
  width: 100%;
  color: var(--text);
}
.sequence-step .step-num {
  background: var(--teal);
  color: #FFFFFF;
  border-radius: 50%;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 800;
  flex-shrink: 0;
}
.sequence-step.correct-final { border-color: var(--green); background: var(--green-tint); }
.sequence-step.incorrect-final { border-color: var(--red); background: var(--red-tint); }

.lesson-footer { padding: 14px 20px 24px; border-top: 2px solid var(--line); margin-top: 16px; }
.feedback-banner { padding: 6px 4px 12px; font-weight: 800; font-size: 15px; display: flex; align-items: center; gap: 8px; }
.feedback-banner.correct { color: var(--green-dark); }
.feedback-banner.incorrect { color: var(--red-dark); }

/* ---------- Results ---------- */

#view-complete, #view-failed {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px 20px;
}
.result-card { text-align: center; width: 100%; display: flex; flex-direction: column; align-items: center; gap: 12px; }
.result-mascot svg { width: 160px; height: 133px; }
.result-card h2 { font-size: 30px; }
.result-msg { color: var(--text-2); font-weight: 600; font-size: 15px; line-height: 1.45; margin: 0 0 8px; max-width: 320px; }
.result-stats { display: flex; justify-content: center; gap: 36px; margin: 6px 0 14px; }
.result-stat { display: flex; flex-direction: column; }
.result-stat .label { font-size: 12px; color: var(--muted); font-weight: 800; letter-spacing: 0.04em; }
.result-stat .value { font-family: var(--display); font-size: 28px; font-weight: 600; font-variant-numeric: tabular-nums; }

.stripe-banner {
  width: 100%;
  padding: 14px 16px;
  border-radius: 16px;
  background: var(--coral-tint);
  color: var(--coral-dark);
  font-weight: 800;
  font-size: 15px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: center;
}
.stripe-banner .belt { width: 70%; }

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; }
  .confetti { display: none; }
}