:root {
  --bg: #f4f2ee;
  --bg-elev: #ffffff;
  --ink: #1a1d21;
  --muted: #6b7280;
  --muted-2: #9ca3af;
  --line: #e5e2db;
  --line-strong: #d4d0c8;
  --accent: #0f6e6a;
  --accent-soft: #e6f3f2;
  --accent-ink: #0a4f4c;
  --good: #1f7a4d;
  --good-bg: #e8f6ee;
  --good-line: #b7e0c8;
  --bad: #b42318;
  --bad-bg: #fef3f2;
  --bad-line: #f5c4bf;
  --warn: #8a6a1a;
  --warn-bg: #faf6e9;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 1px 2px rgba(26, 29, 33, 0.04), 0 12px 32px rgba(26, 29, 33, 0.06);
  --font: "Inter", "SF Pro Text", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--bg); color: var(--ink); }
body { min-height: 100vh; -webkit-font-smoothing: antialiased; }

.app {
  max-width: 640px;
  margin: 0 auto;
  padding: 1.75rem 1.25rem 3.5rem;
}

/* —— Header —— */
.top { margin-bottom: 1.25rem; }
.brand-row {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: .75rem 1rem;
}
.brand h1 {
  margin: 0;
  font-size: 1.2rem;
  font-weight: 650;
  letter-spacing: -0.02em;
  color: var(--ink);
}
.sub {
  margin: .2rem 0 0;
  color: var(--muted);
  font-size: .82rem;
}
.study-chip {
  display: inline-flex;
  align-items: center;
  font-size: .72rem;
  font-weight: 550;
  letter-spacing: .01em;
  color: var(--muted);
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: .28rem .7rem;
  white-space: nowrap;
}

/* —— Controls —— */
.controls {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem 1rem;
  align-items: flex-end;
  margin-bottom: 1.35rem;
  padding: 0;
  background: transparent;
  border: none;
}
.filter {
  display: flex;
  flex-direction: column;
  gap: .28rem;
}
.filter-label {
  font-size: .68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--muted-2);
}
.filter select {
  appearance: none;
  background: var(--bg-elev) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%236b7280' d='M1 1l5 5 5-5'/%3E%3C/svg%3E") right .7rem center / 10px no-repeat;
  color: var(--ink);
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  padding: .45rem 2rem .45rem .7rem;
  font-size: .9rem;
  min-width: 11.5rem;
  font-family: inherit;
}
.filter select:focus {
  outline: 2px solid var(--accent-soft);
  border-color: var(--accent);
}
.progress-wrap { flex: 1; min-width: 140px; padding-bottom: .15rem; }
.progress-meta {
  display: flex;
  justify-content: space-between;
  font-size: .8rem;
  color: var(--muted);
  margin-bottom: .4rem;
}
.bar {
  height: 3px;
  background: var(--line);
  border-radius: 99px;
  overflow: hidden;
}
.bar-fill {
  height: 100%;
  width: 0%;
  background: var(--accent);
  transition: width .28s ease;
}

/* —— Buttons —— */
.btn {
  appearance: none;
  border: none;
  cursor: pointer;
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  border-radius: 10px;
  padding: .6rem 1.15rem;
  font-size: .92rem;
  font-family: inherit;
  transition: background .15s, opacity .15s, box-shadow .15s;
}
.btn:hover { background: var(--accent-ink); }
.btn:disabled { opacity: .4; cursor: not-allowed; }
.btn.ghost {
  background: transparent;
  color: var(--muted);
  border: 1px solid var(--line-strong);
  font-weight: 550;
  padding: .42rem .85rem;
  font-size: .85rem;
}
.btn.ghost:hover {
  color: var(--ink);
  border-color: var(--muted-2);
  background: var(--bg-elev);
}
.btn.next { min-width: 7rem; }
.btn.secondary {
  background: var(--bg-elev);
  color: var(--accent-ink);
  border: 1px solid var(--line-strong);
}
.btn.secondary:hover { border-color: var(--accent); background: var(--accent-soft); }

/* —— Main card —— */
.main { min-height: 380px; }
.loading, .empty {
  color: var(--muted);
  padding: 3rem 0;
  text-align: center;
  font-size: .95rem;
}

.card {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.75rem 1.65rem 1.5rem;
}

.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: .35rem;
  margin-bottom: 1.1rem;
}
.chip {
  font-size: .68rem;
  font-weight: 600;
  letter-spacing: .03em;
  text-transform: uppercase;
  padding: .2rem .5rem;
  border-radius: 999px;
  background: var(--bg);
  color: var(--muted);
  border: 1px solid var(--line);
}
.chip.mod {
  color: var(--accent-ink);
  background: var(--accent-soft);
  border-color: transparent;
}

.story {
  font-size: 1rem;
  line-height: 1.55;
  margin: 0 0 .65rem;
  color: var(--ink);
}
.trap {
  font-size: .84rem;
  color: var(--muted);
  margin: 0 0 1.25rem;
  padding: 0;
  border: none;
  background: transparent;
}
.trap strong { color: var(--warn); font-weight: 600; }

.stem {
  font-size: 1.28rem;
  font-weight: 650;
  letter-spacing: -0.02em;
  margin: 0 0 1.15rem;
  line-height: 1.35;
  color: var(--ink);
}

.choices { display: flex; flex-direction: column; gap: .55rem; }
.choice {
  display: flex;
  gap: .85rem;
  align-items: flex-start;
  text-align: left;
  width: 100%;
  background: var(--bg-elev);
  color: var(--ink);
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  padding: .95rem 1rem;
  cursor: pointer;
  font-size: .98rem;
  line-height: 1.4;
  font-family: inherit;
  transition: border-color .15s, background .15s, box-shadow .15s;
}
.choice:hover:not(:disabled) {
  border-color: var(--accent);
  background: var(--accent-soft);
}
.choice:disabled { cursor: default; }
.choice .letter {
  flex: 0 0 1.55rem;
  height: 1.55rem;
  border-radius: 8px;
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: .78rem;
  background: var(--bg);
  color: var(--muted);
  border: 1px solid var(--line);
}
.choice.correct {
  border-color: var(--good-line);
  background: var(--good-bg);
}
.choice.correct .letter {
  background: var(--good);
  color: #fff;
  border-color: var(--good);
}
.choice.wrong {
  border-color: var(--bad-line);
  background: var(--bad-bg);
}
.choice.wrong .letter {
  background: var(--bad);
  color: #fff;
  border-color: var(--bad);
}
.choice.missed {
  border-color: var(--good-line);
  background: var(--good-bg);
  opacity: .92;
}

/* —— Feedback (compact on-card; detail in spotlight) —— */
.feedback {
  margin-top: 1.25rem;
  padding-top: 1.15rem;
  border-top: 1px solid var(--line);
  animation: fade .22s ease;
}
@keyframes fade {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: none; }
}

.verdict {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  font-weight: 650;
  font-size: .95rem;
  margin-bottom: .85rem;
  padding: .35rem .7rem;
  border-radius: 8px;
}
.verdict.ok { color: var(--good); background: var(--good-bg); }
.verdict.no { color: var(--bad); background: var(--bad-bg); }

.why-line {
  margin: 0 0 1rem;
  font-size: .92rem;
  line-height: 1.45;
  color: var(--muted);
}

.shot-row {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  align-items: stretch;
  margin-bottom: .25rem;
}
.shot-thumb {
  position: relative;
  flex: 0 0 auto;
  width: 160px;
  max-width: 42%;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--line);
  background: #111;
  cursor: zoom-in;
  padding: 0;
  font: inherit;
  color: inherit;
  text-align: left;
  transition: box-shadow .15s, border-color .15s;
}
.shot-thumb:hover,
.shot-thumb:focus-visible {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
  outline: none;
}
.shot-thumb img {
  display: block;
  width: 100%;
  height: 100px;
  object-fit: cover;
  object-position: top center;
}
.shot-thumb .open-label {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  background: linear-gradient(transparent, rgba(0,0,0,.72));
  color: #fff;
  font-size: .7rem;
  font-weight: 600;
  padding: 1.1rem .55rem .4rem;
  letter-spacing: .02em;
}
.shot-actions {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: .5rem;
  flex: 1;
  min-width: 140px;
}
.shot-actions p {
  margin: 0;
  font-size: .82rem;
  color: var(--muted);
  line-height: 1.4;
}
.unknown {
  color: var(--warn);
  font-size: .88rem;
  margin: .5rem 0;
}

.actions {
  display: flex;
  gap: .6rem;
  flex-wrap: wrap;
  margin-top: 1.15rem;
  align-items: center;
}

/* —— Done —— */
.done { text-align: center; padding: 2.5rem 1.25rem; }
.done h2 { margin: 0 0 .35rem; font-weight: 650; letter-spacing: -0.02em; }
.done .big {
  font-size: 2.6rem;
  color: var(--accent);
  font-weight: 700;
  margin: .5rem 0 1rem;
  letter-spacing: -0.03em;
}
.done p { color: var(--muted); margin: 0 0 1.25rem; }

.foot {
  margin-top: 1.5rem;
  color: var(--muted-2);
  font-size: .75rem;
  text-align: center;
}

/* —— Spotlight overlay —— */
.spotlight[hidden] { display: none !important; }
.spotlight {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: stretch;
  justify-content: center;
}
.spotlight-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(26, 29, 33, 0.55);
  backdrop-filter: blur(4px);
}
.spotlight-panel {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  width: min(1100px, 100%);
  max-height: 100%;
  margin: 0 auto;
  background: var(--bg);
  box-shadow: 0 24px 64px rgba(0,0,0,.28);
}
.spotlight-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: .85rem 1.15rem;
  border-bottom: 1px solid var(--line);
  background: var(--bg-elev);
  flex-shrink: 0;
}
.spotlight-head h2 {
  margin: 0;
  font-size: 1rem;
  font-weight: 650;
  letter-spacing: -0.01em;
}
.spotlight-body {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 0;
  flex: 1;
  min-height: 0;
  overflow: hidden;
}
.spotlight-visual {
  display: flex;
  flex-direction: column;
  min-height: 0;
  background: #1a1d21;
  border-right: 1px solid var(--line);
}
.spotlight-shot {
  position: relative;
  flex: 1;
  overflow: auto;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 1rem;
  min-height: 240px;
}
.spotlight-shot img {
  max-width: 100%;
  width: auto;
  height: auto;
  display: block;
  border-radius: 4px;
  box-shadow: 0 8px 24px rgba(0,0,0,.35);
}
.img-callout {
  position: absolute;
  left: 1.25rem;
  bottom: 1.25rem;
  max-width: min(420px, 85%);
  background: rgba(255, 252, 245, 0.96);
  color: var(--ink);
  border-left: 4px solid var(--accent);
  border-radius: 0 8px 8px 0;
  padding: .65rem .85rem;
  font-size: .88rem;
  font-weight: 600;
  line-height: 1.35;
  box-shadow: 0 6px 20px rgba(0,0,0,.25);
  pointer-events: none;
}
.spotlight-hint {
  margin: 0;
  padding: .45rem .85rem .65rem;
  font-size: .72rem;
  color: var(--muted-2);
  background: #111;
  text-align: center;
  flex-shrink: 0;
}
.spotlight-aside {
  overflow: auto;
  padding: 1.15rem 1.25rem 1.75rem;
  background: var(--bg-elev);
  min-height: 0;
}
.sp-block { margin: 0 0 1.15rem; }
.sp-block:last-child { margin-bottom: 0; }
.sp-block h3 {
  margin: 0 0 .4rem;
  font-size: .68rem;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--muted-2);
  font-weight: 700;
}
.sp-block p, .sp-block blockquote {
  margin: 0;
  line-height: 1.5;
  font-size: .9rem;
  color: var(--ink);
}
.sp-verdict {
  display: inline-flex;
  font-weight: 650;
  font-size: .88rem;
  padding: .3rem .65rem;
  border-radius: 8px;
  margin-bottom: .55rem;
}
.sp-verdict.ok { color: var(--good); background: var(--good-bg); }
.sp-verdict.no { color: var(--bad); background: var(--bad-bg); }
.sp-plain {
  background: var(--accent-soft);
  border: 1px solid #c5e0dd;
  padding: .7rem .85rem;
  border-radius: var(--radius-sm);
  color: var(--accent-ink);
  font-weight: 550;
}
.sp-hook {
  background: var(--warn-bg);
  border: 1px solid #ead9a8;
  padding: .65rem .85rem;
  border-radius: var(--radius-sm);
  color: var(--warn);
  font-style: italic;
}
.sp-passage {
  background: var(--bg);
  border: 1px solid var(--line);
  padding: .75rem .85rem;
  border-radius: var(--radius-sm);
  color: #374151;
  white-space: pre-wrap;
  font-size: .85rem;
  line-height: 1.5;
  max-height: 280px;
  overflow: auto;
  font-family: var(--font);
}
.sp-passage mark {
  background: #fef08a;
  color: inherit;
  padding: .05em .12em;
  border-radius: 2px;
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
}
.sp-passage .cite {
  display: block;
  margin-top: .55rem;
  font-size: .72rem;
  color: var(--muted);
  font-style: normal;
  white-space: normal;
  font-family: var(--mono);
}

body.spotlight-open { overflow: hidden; }

@media (max-width: 820px) {
  .spotlight-body {
    grid-template-columns: 1fr;
    overflow: auto;
  }
  .spotlight-visual {
    border-right: none;
    border-bottom: 1px solid var(--line);
    max-height: 48vh;
  }
  .spotlight-shot { max-height: 42vh; }
  .spotlight-panel { max-height: 100%; }
}

@media (max-width: 560px) {
  .app { padding: 1.1rem .85rem 2.5rem; }
  .card { padding: 1.25rem 1.1rem 1.2rem; }
  .stem { font-size: 1.12rem; }
  .shot-thumb { width: 130px; }
}

/* —— Drive mode —— */
.btn.drive-toggle {
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  padding: .42rem .9rem;
  font-size: .85rem;
  white-space: nowrap;
}
.btn.drive-toggle:hover { background: var(--accent-ink); }
.btn.drive-toggle.active {
  background: var(--bad);
}
.btn.drive-toggle.active:hover { background: #912018; }

.drive-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .65rem 1rem;
  margin: 0 0 1.1rem;
  padding: .7rem .9rem;
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow);
}
.drive-bar[hidden] { display: none !important; }

.drive-status {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  font-size: .88rem;
  font-weight: 600;
  color: var(--ink);
  min-width: 9rem;
}
.drive-dot {
  width: .7rem;
  height: .7rem;
  border-radius: 50%;
  background: var(--muted-2);
  flex-shrink: 0;
  box-shadow: 0 0 0 0 transparent;
}
.drive-dot[data-phase="speaking"] {
  background: var(--accent);
  animation: pulse-speak 1.1s ease-in-out infinite;
}
.drive-dot[data-phase="listening"] {
  background: #c2410c;
  animation: pulse-listen .9s ease-in-out infinite;
}
.drive-dot[data-phase="feedback"] {
  background: var(--good);
}
.drive-dot[data-phase="paused"],
.drive-dot[data-phase="idle"] {
  background: var(--muted-2);
}
.drive-dot[data-phase="error"] {
  background: var(--bad);
}

@keyframes pulse-speak {
  0%, 100% { box-shadow: 0 0 0 0 rgba(15, 110, 106, 0.45); transform: scale(1); }
  50% { box-shadow: 0 0 0 6px rgba(15, 110, 106, 0); transform: scale(1.15); }
}
@keyframes pulse-listen {
  0%, 100% { box-shadow: 0 0 0 0 rgba(194, 65, 12, 0.5); transform: scale(1); }
  50% { box-shadow: 0 0 0 7px rgba(194, 65, 12, 0); transform: scale(1.2); }
}


.voice-provider {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  font-size: .78rem;
  color: var(--muted);
}
.voice-provider-label {
  font-weight: 600;
  color: var(--muted);
}
.voice-provider select {
  font: inherit;
  font-size: .78rem;
  color: var(--ink);
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: .25rem .4rem;
  max-width: 9.5rem;
}

.ptt-toggle {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  font-size: .78rem;
  color: var(--muted);
  cursor: pointer;
  user-select: none;
}
.ptt-toggle input { accent-color: var(--accent); }

.ptt-btn {
  min-width: 7.5rem;
  touch-action: none;
}
.ptt-btn.armed {
  background: #c2410c;
  color: #fff;
  border-color: #c2410c;
}

.drive-hint {
  margin: 0;
  flex: 1 1 100%;
  font-size: .72rem;
  color: var(--muted-2);
  line-height: 1.35;
}

body.drive-on .app {
  /* subtle parked-car cue */
}
body.drive-on .choice:hover:not(:disabled) {
  /* keep clickable fallback clear */
}

@media (max-width: 560px) {
  .btn.drive-toggle { width: 100%; }
  .drive-bar { padding: .65rem .75rem; }
}


/* —— Phase C tutor panel —— */
.tutor-panel {
  margin: 0 0 1.25rem;
  padding: 1rem 1.1rem 1.15rem;
  background: var(--bg-elev);
  border: 1px solid var(--line-strong);
  border-radius: 14px;
  box-shadow: 0 1px 0 rgba(15, 23, 42, .04);
}
.tutor-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem .85rem;
  margin-bottom: .45rem;
}
.tutor-title {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.tutor-chip {
  font-size: .68rem;
  font-weight: 600;
  color: var(--accent-ink);
  background: var(--accent-soft);
  border-radius: 999px;
  padding: .22rem .65rem;
}
.tutor-lead {
  margin: 0 0 .75rem;
  font-size: .86rem;
  color: var(--muted);
  line-height: 1.45;
}
.tutor-label {
  display: block;
  font-size: .68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--muted-2);
  margin-bottom: .3rem;
}
.tutor-input {
  width: 100%;
  box-sizing: border-box;
  resize: vertical;
  min-height: 4.5rem;
  font-family: inherit;
  font-size: .95rem;
  line-height: 1.45;
  color: var(--ink);
  background: var(--bg);
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  padding: .65rem .75rem;
}
.tutor-input:focus {
  outline: 2px solid var(--accent-soft);
  border-color: var(--accent);
}
.tutor-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin-top: .7rem;
}
.tutor-status {
  margin-top: .65rem;
  font-size: .82rem;
  color: var(--muted);
  min-height: 1.2em;
}
.tutor-answer {
  margin-top: .75rem;
  padding: .85rem .9rem;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 12px;
}
.tutor-answer.refused {
  border-color: #f0c7c0;
  background: #fff8f7;
}
.tutor-answer h3 {
  margin: 0 0 .45rem;
  font-size: .78rem;
  text-transform: uppercase;
  letter-spacing: .05em;
  color: var(--muted-2);
}
.tutor-answer .tutor-body {
  margin: 0;
  font-size: .92rem;
  line-height: 1.5;
  white-space: pre-wrap;
}
.tutor-cites {
  margin: .75rem 0 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: .55rem;
}
.tutor-cites li {
  font-size: .8rem;
  line-height: 1.4;
  color: var(--muted);
  padding: .55rem .65rem;
  border-left: 3px solid var(--accent);
  background: var(--accent-soft);
  border-radius: 0 8px 8px 0;
}
.tutor-cites .cite-meta {
  display: block;
  font-weight: 600;
  color: var(--accent-ink);
  margin-bottom: .2rem;
  font-size: .72rem;
  text-transform: uppercase;
  letter-spacing: .04em;
}