/* ── CSS Variables ── */
:root {
  --quiz-bg:    #3DDE6C;
  --scene-bg:   #FAFAFA;
  --text:       #111111;
  --white:      #FFFFFF;
  --muted:      rgba(0, 0, 0, 0.42);
  --border:     rgba(0, 0, 0, 0.14);
  --ok:         #3DDE6C;
  --close:      #FFD60A;
  --wrong:      #FF3B30;
  --radius-pill: 999px;
  --radius-card: 18px;
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
h1, h2, h3, h4, p { margin: 0; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "PingFang SC", "Hiragino Sans GB", "Microsoft Yahei", sans-serif;
  background: var(--scene-bg);
  transition: background 0.2s ease;
  color: var(--text);
  min-height: 100dvh;
}

/* ── App Shell ── */
.app-shell {
  width: min(100%, 560px);
  margin: 0 auto;
  min-height: 100dvh;
}

/* ── View System ── */
.view { display: none; }
.view.active {
  display: block;
  animation: fadeIn 0.18s ease both;
}
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* Full-screen flex views */
#quizView.active,
#feedbackView.active,
#answerView.active,
#doneView.active {
  display: flex;
  flex-direction: column;
  min-height: 100dvh;
}

/* ══════════════════════════════
   HOME VIEW
══════════════════════════════ */

#homeView.active {
  padding: 40px 24px calc(36px + env(keyboard-inset-height, 0px));
}

.home-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 28px;
}

.home-header h1 {
  font-size: 1.65rem;
  font-weight: 800;
  letter-spacing: -0.025em;
  color: var(--text);
  line-height: 1.1;
}

.home-sub {
  font-size: 0.78rem;
  color: var(--muted);
  margin-top: 4px;
  letter-spacing: 0.01em;
}

/* Stats row — flat, no cards */
.stats-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-bottom: 36px;
}

.stat-card {
  padding: 0;
  background: none;
  border: none;
  border-radius: 0;
  position: static;
  overflow: visible;
}

/* Colored left accent line instead of card border */
.stat-card {
  padding-left: 14px;
  border-left: 3px solid transparent;
}
.stat-new      { border-left-color: #8B97FF; }
.stat-progress { border-left-color: #4C6FFF; }
.stat-mastered { border-left-color: #3DDE6C; }

/* Remove old bottom strip */
.stat-card::after { display: none; }

/* Hide old emoji icon */
.stat-icon { display: none; }

.stat-num {
  display: block;
  font-size: 2.6rem;
  font-weight: 800;
  line-height: 1;
  color: var(--text);
  letter-spacing: -0.03em;
}

.stat-card label {
  display: block;
  font-size: 0.65rem;
  color: var(--muted);
  margin-top: 6px;
  text-transform: uppercase;
  letter-spacing: 0.07em;
}

/* Settings toggle */
.icon-btn {
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 6px 8px;
  color: var(--text);
  border-radius: 8px;
  transition: background 0.12s, transform 0.1s, opacity 0.1s;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.icon-btn:hover  { background: rgba(0,0,0,0.06); }
.icon-btn:active { opacity: 0.7; transform: scale(0.92); }

/* Ensure SVG icons inherit color and don't stretch */
.icon-btn svg,
.circle-btn svg {
  display: block;
  flex-shrink: 0;
  pointer-events: none;
}

/* Settings panel — flat, just a top divider */
.settings-panel {
  background: none;
  border: none;
  border-top: 1px solid #E8E8E8;
  border-radius: 0;
  padding: 18px 0;
  margin-bottom: 8px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.settings-title { font-size: 0.95rem; font-weight: 700; }
.settings-desc  { font-size: 0.78rem; color: var(--muted); }
.settings-label { font-size: 0.78rem; color: var(--muted); }
.settings-input {
  width: 100%;
  padding: 10px 12px;
  border: 1.5px solid #E0E0E0;
  border-radius: 10px;
  font-size: 0.9rem;
  background: var(--white);
  color: var(--text);
  outline: none;
}
.settings-input:focus { border-color: var(--text); }
.settings-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-top: 4px;
}
.settings-status { font-size: 0.78rem; min-height: 1.2em; color: #3DDE6C; }
.settings-status.err { color: var(--wrong); }

/* Interest tags — flat */
.interest-section {
  background: none;
  border: none;
  border-radius: 0;
  padding: 0;
  margin-bottom: 24px;
}
.interest-section .section-title { margin-bottom: 12px; }

.interest-tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  min-height: 28px;
  margin-bottom: 10px;
}
.interest-tag {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: #F0F0F0;
  color: var(--text);
  border-radius: 20px;
  padding: 4px 12px 4px 10px;
  font-size: 0.82rem;
  font-weight: 500;
}
.interest-tag-remove {
  cursor: pointer;
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1;
  padding: 0 2px;
  background: none;
  border: none;
}
.interest-tag-remove:hover { color: var(--wrong); }
.interest-input-row { display: flex; gap: 8px; }
.interest-input {
  flex: 1;
  padding: 9px 12px;
  border: 1.5px solid #E0E0E0;
  border-radius: 10px;
  font-size: 0.88rem;
  background: var(--white);
  color: var(--text);
  outline: none;
}
.interest-input:focus { border-color: var(--text); }
.interest-empty-hint {
  font-size: 0.78rem;
  color: var(--muted);
  font-style: italic;
}

/* Home plan card — flat, top divider only */
.home-plan-card {
  background: none;
  border: none;
  border-top: 1px solid #E8E8E8;
  border-radius: 0;
  padding: 20px 0 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.section-title {
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* Count picker */
.count-picker { display: flex; flex-direction: column; gap: 8px; }
.count-label  { font-size: 0.8rem; color: var(--muted); }

.count-input-row {
  display: flex;
  align-items: center;
  gap: 8px;
}
.count-step {
  width: 36px; height: 36px;
  border: 1px solid #D8D8D8;
  border-radius: 8px;
  background: transparent;
  color: var(--text);
  font-size: 1.3rem;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: background 0.12s;
}
.count-step:active { background: #EFEFEF; }
.count-input {
  flex: 1;
  padding: 8px 12px;
  border: none;
  border-bottom: 1.5px solid #D0D0D0;
  border-radius: 0;
  font-size: 1.2rem;
  font-weight: 800;
  text-align: center;
  color: var(--text);
  background: transparent;
  outline: none;
  -moz-appearance: textfield;
  letter-spacing: -0.01em;
}
.count-input::-webkit-outer-spin-button,
.count-input::-webkit-inner-spin-button { -webkit-appearance: none; }
.count-input:focus { border-bottom-color: var(--text); }
.count-hint { font-size: 0.73rem; color: var(--muted); }

/* Today board */
.today-board { font-size: 0.9rem; color: var(--text); }
.overflow-hint {
  font-size: 0.78rem;
  color: var(--wrong);
  background: #FFF0EE;
  border-radius: 8px;
  padding: 6px 10px;
}

/* Progress */
.progress-wrap {
  height: 5px;
  border-radius: var(--radius-pill);
  background: #EBEBEB;
  overflow: hidden;
}
.progress-bar {
  height: 100%;
  width: 0;
  background: var(--text);
  border-radius: var(--radius-pill);
  transition: width 0.4s ease;
}
.progress-text { font-size: 0.78rem; color: var(--muted); text-align: right; }

/* Primary button — black capsule */
.primary-btn {
  border: none;
  cursor: pointer;
  font-size: 0.95rem;
  font-weight: 700;
  padding: 14px 22px;
  border-radius: var(--radius-pill);
  background: var(--text);
  color: var(--white);
  transition: opacity 0.15s, transform 0.1s;
  letter-spacing: 0.01em;
}
.primary-btn:hover  { opacity: 0.85; }
.primary-btn:active { transform: scale(0.97); }
.primary-btn:disabled { opacity: 0.4; pointer-events: none; }
.full-btn { width: 100%; }

/* Ghost button */
.ghost-btn {
  border: 1.5px solid #DCDCDC;
  background: transparent;
  color: var(--text);
  padding: 10px 14px;
  border-radius: 10px;
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 500;
  transition: background 0.12s;
}
.ghost-btn:active { background: #F0F0F0; }

/* Danger btn (hidden in new design, skip uses circle-btn) */
.danger-btn { display: none; }

/* ══════════════════════════════
   QUIZ VIEW  — full-screen color
══════════════════════════════ */

/* Dual progress: very thin strip at the very top */
#quizView .dual-progress {
  display: flex;
  gap: 3px;
  padding: 0 16px;
  margin-top: 14px;
}
.dp-track {
  flex: 1;
  height: 3px;
  border-radius: var(--radius-pill);
  background: rgba(0,0,0,0.15);
  overflow: hidden;
}
.dp-bar {
  height: 100%;
  width: 0;
  transition: width 0.35s ease;
  border-radius: var(--radius-pill);
  background: rgba(0,0,0,0.45);
}

.quiz-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 8px 0;
}
.quiz-progress-text {
  font-size: 0.75rem;
  color: rgba(0,0,0,0.45);
  text-align: center;
  flex: 1;
  letter-spacing: 0.01em;
}

/* Question content area: fills remaining space, text at bottom */
.quiz-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 0 24px 20px;
}

.mode-tag {
  font-size: 0.68rem;
  font-weight: 700;
  color: rgba(0,0,0,0.45);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 14px;
}

/* Main question text — huge, left-aligned, black */
.question {
  font-size: clamp(2.2rem, 9vw, 3.6rem);
  font-weight: 800;
  color: var(--text);
  line-height: 1.08;
  word-break: break-word;
  /* Remove any gradient from previous design */
  background: none !important;
  -webkit-text-fill-color: initial !important;
  -webkit-background-clip: initial !important;
  background-clip: initial !important;
}

/* Chinese question (cn-en mode): slightly smaller for readability */
.question.question-cn {
  font-size: clamp(1.5rem, 6vw, 2.2rem);
  font-weight: 700;
  line-height: 1.25;
}

.hint {
  margin-top: 10px;
  font-size: 0.85rem;
  color: rgba(0,0,0,0.45);
}

.chain-prompt {
  font-size: 0.88rem;
  color: rgba(0,0,0,0.6);
  margin-bottom: 16px;
  line-height: 1.55;
  padding: 10px 14px;
  background: rgba(0,0,0,0.08);
  border-radius: 12px;
}

/* Input area: stuck to bottom */
.input-area {
  padding: 0 20px calc(28px + env(keyboard-inset-height, 0px));
}

#answerInput {
  width: 100%;
  padding: 14px 20px;
  border: 2px solid rgba(0,0,0,0.65);
  border-radius: var(--radius-pill);
  font-size: 1rem;
  background: transparent;
  color: var(--text);
  margin-bottom: 18px;
  outline: none;
  transition: border-color 0.15s;
}
#answerInput::placeholder { color: rgba(0,0,0,0.3); }
#answerInput:focus { border-color: var(--text); }

/* Three circle ghost buttons */
.btn-row {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 28px;
}

.circle-btn {
  width: 56px; height: 56px;
  border-radius: 50%;
  border: 1.5px solid rgba(0,0,0,0.55);
  background: transparent;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text);
  transition: background 0.12s, transform 0.1s, border-color 0.12s;
  position: relative;
  overflow: hidden;
}
.circle-btn:active { transform: scale(0.91); }
.circle-btn:disabled { opacity: 0.35; pointer-events: none; }

/* Loading state: overlay spinner */
.circle-btn.is-loading::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 2px solid transparent;
  border-top-color: rgba(0,0,0,0.6);
  animation: spin 0.7s linear infinite;
}
.circle-btn.is-loading > * { opacity: 0; }

/* Mic recording state */
.circle-btn.recording {
  border-color: var(--wrong);
  color: var(--wrong);
  animation: mic-pulse 1s ease-in-out infinite;
}
@keyframes mic-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(255,59,48,0.35); }
  50%       { box-shadow: 0 0 0 10px rgba(255,59,48,0); }
}

/* ══════════════════════════════
   FEEDBACK VIEW — same bg as quiz
══════════════════════════════ */

#feedbackView.active {
  align-items: center;
  justify-content: center;
  gap: 0;
}

#feedbackView .quiz-topbar {
  position: absolute;
  top: 0; left: 0; right: 0;
  max-width: 560px;
  margin: 0 auto;
}

.feedback-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 0 20px;
}

.feedback-spinner {
  width: 32px; height: 32px;
  border: 2px solid rgba(0,0,0,0.15);
  border-top-color: rgba(0,0,0,0.6);
  border-radius: 50%;
  animation: spin 0.75s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.feedback-card h2 {
  font-size: 0.95rem;
  font-weight: 600;
  color: rgba(0,0,0,0.55);
}
.feedback-msg {
  font-size: 0.82rem;
  color: rgba(0,0,0,0.38);
}
.feedback-compare { display: none; }

/* ══════════════════════════════
   ANSWER VIEW — dark
══════════════════════════════ */

/* Judge banner: colored full-width strip at the very top */
/* Judge banner — inline pill, sits inside answer-body */
.judge-banner {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 4px 8px;
  margin-bottom: 20px;
  padding: 0;
  background: none;
}

/* Colored status dot */
.judge-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  display: inline-block;
  flex-shrink: 0;
  align-self: center;
}
.judge-banner.status-correct .judge-dot { background: #3DDE6C; }
.judge-banner.status-close   .judge-dot { background: #FFD60A; }
.judge-banner.status-wrong   .judge-dot { background: #FF5C5C; }
.judge-banner.status-skip    .judge-dot { background: rgba(255,255,255,0.3); }

#judgeStatusText {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}
.judge-banner.status-correct #judgeStatusText { color: #3DDE6C; }
.judge-banner.status-close   #judgeStatusText { color: #FFD60A; }
.judge-banner.status-wrong   #judgeStatusText { color: #FF5C5C; }
.judge-banner.status-skip    #judgeStatusText { color: rgba(255,255,255,0.4); }

.judge-msg {
  font-size: 0.82rem;
  color: rgba(255,255,255,0.55);
  margin: 0;
  line-height: 1.6;
  width: 100%;
}

.judge-compare {
  width: 100%;
  font-size: 0.82rem;
  line-height: 1.7;
  white-space: pre-line;
  color: rgba(255,255,255,0.48);
  border-top: none;
  padding-top: 0;
  margin-top: 0;
}

/* Answer topbar: white icons on dark bg */
#answerView .quiz-topbar {
  padding: 10px 8px 0;
}
#answerView .icon-btn       { color: rgba(255,255,255,0.7); }
#answerView .icon-btn:hover { background: rgba(255,255,255,0.1); }
#answerView .quiz-progress-text { color: rgba(255,255,255,0.45); }

/* Scrollable content area */
.answer-body {
  flex: 1;
  padding: 20px 24px 20px;
  overflow-y: auto;
}

.answer-word-row {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 6px;
}

/* Large serif word */
.answer-word-row h2 {
  font-family: 'Playfair Display', Georgia, 'Noto Serif SC', "Times New Roman", serif;
  font-size: clamp(2.4rem, 9vw, 3.6rem);
  font-weight: 700;
  color: var(--white);
  flex: 1;
  line-height: 1.08;
  word-break: break-word;
}

.answer-phonetic {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.52);
  font-family: "Courier New", "Consolas", monospace;
  margin-bottom: 22px;
  letter-spacing: 0.02em;
}

/* Tier-2: meaning — primary readable content */
.answer-meaning {
  font-size: 1.05rem;
  line-height: 1.85;
  color: rgba(255,255,255,0.92);
  margin-bottom: 28px;
  font-weight: 400;
}

/* ── Shared section block style ── */
.root-card,
.example-card {
  border-radius: 0 10px 10px 0;
  padding: 14px 16px 14px 18px;
  margin-bottom: 10px;
  animation: fadeIn 0.3s ease both;
}

/* Root section — neutral left accent */
.root-card {
  background: rgba(255,255,255,0.045);
  border-left: 2px solid rgba(255,255,255,0.18);
}
.root-card > h3 {
  font-size: 0.6rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: rgba(255,255,255,0.28);
  margin: 0 0 12px;
  font-weight: 600;
}
.root-card section + section {
  border-top: 1px solid rgba(255,255,255,0.07);
  padding-top: 12px;
  margin-top: 12px;
}
.root-card section h3 {
  font-size: 0.93rem;
  margin: 0 0 5px;
  color: rgba(255,255,255,0.88);
  font-weight: 600;
}
.root-card section p {
  font-size: 0.84rem;
  color: rgba(255,255,255,0.56);
  margin: 3px 0;
  line-height: 1.6;
}
.root-card ul {
  margin: 6px 0 0;
  padding-left: 16px;
  font-size: 0.83rem;
}
.root-card li {
  margin-bottom: 4px;
  color: rgba(255,255,255,0.6);
  line-height: 1.55;
}

/* Example section — green left accent (life / usage) */
.example-card {
  background: rgba(61,222,108,0.06);
  border-left: 2px solid rgba(61,222,108,0.35);
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.example-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}
.example-tag {
  font-size: 0.6rem;
  color: rgba(255,255,255,0.28);
  background: none;
  border-radius: 0;
  padding: 0;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-weight: 600;
}
.example-speak-btn {
  flex: 0 0 auto;
  width: 30px;
  height: 30px;
  color: rgba(255,255,255,0.45);
}
.example-speak-btn:hover { color: rgba(255,255,255,0.75); }
.example-en {
  font-size: 0.95rem;
  color: rgba(255,255,255,0.84);
  font-style: italic;
  line-height: 1.7;
}
.example-cn {
  font-size: 0.86rem;
  color: rgba(255,255,255,0.52);
  line-height: 1.6;
}
.example-loading {
  font-size: 0.83rem;
  color: rgba(255,255,255,0.3);
  text-align: left;
  padding: 4px 0;
  animation: pulse 1.2s ease-in-out infinite;
}

/* Answer footer: sticky bottom */
.answer-footer {
  padding: 12px 20px calc(28px + env(keyboard-inset-height, 0px));
}

/* Capsule button (white on dark, for answer/done) */
.capsule-btn {
  border: none;
  cursor: pointer;
  font-size: 0.95rem;
  font-weight: 700;
  padding: 15px 24px;
  border-radius: var(--radius-pill);
  background: var(--white);
  color: #111;
  transition: opacity 0.15s, transform 0.1s;
  letter-spacing: 0.01em;
}
.capsule-btn:hover  { opacity: 0.9; }
.capsule-btn:active { transform: scale(0.97); }
.capsule-btn:disabled { opacity: 0.35; pointer-events: none; }
.capsule-btn.full-btn { width: 100%; }

/* Chain prompt (light on dark answer bg — but this shows in QUIZ not answer) */
/* Already styled under quiz-content */

/* ══════════════════════════════
   DONE VIEW — full-screen dark
══════════════════════════════ */

#doneView.active {
  align-items: center;
  justify-content: center;
  padding: 40px 28px;
}

.done-icon { display: none; }

.done-card {
  width: 100%;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.done-card h2 {
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--white);
  letter-spacing: -0.02em;
}

.done-stats {
  font-size: 0.95rem;
  color: rgba(255,255,255,0.5);
  line-height: 1.7;
}

/* ══════════════════════════════
   KEYFRAMES
══════════════════════════════ */

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.35; }
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-6px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── Utilities ── */
.hidden { display: none !important; }