/* ── Variables ─────────────────────────────────────────── */
:root {
  --green:        #58CC02;
  --green-dark:   #46a302;
  --green-light:  #e5f9c0;
  --blue:         #1CB0F6;
  --blue-light:   #d7f1fd;
  --red:          #FF4B4B;
  --red-light:    #ffe0e0;
  --purple:       #CE82FF;
  --purple-light: #f5e8ff;
  --yellow:       #FFD900;
  --gray-1:       #afafaf;
  --gray-2:       #e5e5e5;
  --gray-3:       #f7f7f7;
  --text:         #3c3c3c;
  --radius:       16px;
  --shadow:       0 2px 10px rgba(0,0,0,.08);
}

/* ── Reset ─────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--gray-3);
  color: var(--text);
  min-height: 100dvh;
  -webkit-tap-highlight-color: transparent;
}

#app {
  max-width: 480px;
  margin: 0 auto;
  min-height: 100dvh;
  background: #fff;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

/* ── Screens ───────────────────────────────────────────── */
.screen {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 0;
  padding-bottom: env(safe-area-inset-bottom, 16px);
}

/* ── Native Language Select (first launch) ─────────────── */
.native-lang-screen {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 28px;
  padding: 40px 24px;
  text-align: center;
}

.native-lang-logo { font-size: 5rem; line-height: 1; }

.native-lang-title {
  font-size: 1.5rem;
  font-weight: 800;
  line-height: 1.4;
}

.native-lang-title span {
  font-size: 1.3rem;
  color: var(--gray-1);
}

.native-lang-sub {
  font-size: .85rem;
  color: var(--gray-1);
  margin-top: -16px;
}

.native-lang-options {
  display: flex;
  flex-direction: column;
  gap: 14px;
  width: 100%;
  max-width: 320px;
}

.native-lang-btn {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 24px;
  background: #fff;
  border: 2px solid var(--gray-2);
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  transition: border-color .15s, box-shadow .15s;
}

.native-lang-btn:hover,
.native-lang-btn:active {
  border-color: var(--green);
  box-shadow: var(--shadow);
}

.nlb-flag { font-size: 2rem; }

/* ── Language Select ───────────────────────────────────── */
.lang-header {
  padding: 40px 24px 32px;
  text-align: center;
}

.lang-header-top {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 12px;
}

.btn-settings {
  background: none;
  border: none;
  font-size: 1.3rem;
  cursor: pointer;
  opacity: .6;
  transition: opacity .15s;
}

.btn-settings:hover { opacity: 1; }

.lang-header h1 {
  font-size: 1.75rem;
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 8px;
}

.lang-header p {
  color: var(--gray-1);
  font-size: .95rem;
}

.lang-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 0 20px;
}

.lang-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 20px;
  background: #fff;
  border: 2px solid var(--gray-2);
  border-radius: var(--radius);
  cursor: pointer;
  transition: border-color .15s, box-shadow .15s;
  text-decoration: none;
  color: inherit;
}

.lang-card:not(.locked):hover,
.lang-card:not(.locked):active {
  border-color: var(--green);
  box-shadow: var(--shadow);
}

.lang-card.locked {
  background: var(--gray-3);
  cursor: default;
  opacity: .7;
}

.lang-flag { font-size: 2.2rem; line-height: 1; }

.lang-info { flex: 1; text-align: left; }
.lang-info strong { font-size: 1rem; display: block; }
.lang-info span { font-size: .8rem; color: var(--gray-1); }

.lang-chevron { color: var(--gray-1); font-size: 1rem; }

/* ── Section Select ────────────────────────────────────── */
.section-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 12px 20px 24px;
}

.section-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 22px 20px;
  background: #fff;
  border: 2px solid var(--gray-2);
  border-radius: var(--radius);
  cursor: pointer;
  transition: border-color .15s, box-shadow .15s;
}

.section-card:hover,
.section-card:active {
  border-color: var(--blue);
  box-shadow: var(--shadow);
}

.section-icon { font-size: 2.2rem; line-height: 1; }

.section-info { flex: 1; }
.section-info strong { font-size: 1.05rem; display: block; font-weight: 700; }
.section-info span   { font-size: .85rem; color: var(--gray-1); }

/* ── Resources Screen ──────────────────────────────────── */
.res-content {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 8px 20px 32px;
  overflow-y: auto;
}

.res-card {
  background: #fff;
  border: 2px solid var(--gray-2);
  border-radius: var(--radius);
  overflow: hidden;
}

.res-card-header {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 18px;
  background: var(--gray-3);
  border-bottom: 1px solid var(--gray-2);
}

.res-icon { font-size: 1.8rem; line-height: 1; }

.res-title  { display: block; font-size: .95rem; font-weight: 700; }
.res-source { font-size: .75rem; color: var(--gray-1); }

.res-section {
  padding: 14px 18px;
  border-bottom: 1px solid var(--gray-2);
}

.res-section:last-child { border-bottom: none; }

.res-section-heading {
  font-size: .8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .05em;
  color: var(--blue);
  margin-bottom: 10px;
}

.res-note {
  font-size: .85rem;
  color: var(--text);
  line-height: 1.6;
  margin-bottom: 6px;
}

.res-table {
  width: 100%;
  border-collapse: collapse;
  font-size: .82rem;
}

.res-table th {
  text-align: left;
  font-weight: 700;
  color: var(--gray-1);
  padding: 4px 6px;
  border-bottom: 1px solid var(--gray-2);
}

.res-table td {
  padding: 5px 6px;
  border-bottom: 1px solid var(--gray-3);
  vertical-align: top;
}

.res-table tr:last-child td { border-bottom: none; }
.res-table td:first-child { font-weight: 600; color: var(--text); }

/* ── Level Select ──────────────────────────────────────── */
.level-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 12px 20px 24px;
}

.level-card {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 18px;
  background: #fff;
  border: 2px solid var(--gray-2);
  border-radius: var(--radius);
  cursor: pointer;
  transition: border-color .15s, box-shadow .15s;
}

.level-card:not(.locked):hover,
.level-card:not(.locked):active {
  border-color: var(--green);
  box-shadow: var(--shadow);
}

.level-card.locked {
  background: var(--gray-3);
  cursor: default;
  opacity: .65;
}

.level-badge {
  min-width: 52px;
  height: 52px;
  border-radius: 12px;
  background: var(--blue-light);
  color: var(--blue);
  font-size: .78rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  letter-spacing: .02em;
}

.level-card.locked .level-badge {
  background: var(--gray-2);
  color: var(--gray-1);
}

.level-info { flex: 1; }
.level-info strong { font-size: .95rem; display: block; font-weight: 700; }
.level-info span   { font-size: .8rem; color: var(--gray-1); }

/* ── Lesson List ───────────────────────────────────────── */
.list-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 20px 20px 8px;
}

.btn-back {
  background: none;
  border: none;
  font-size: 1.4rem;
  cursor: pointer;
  color: var(--text);
  line-height: 1;
  padding: 4px;
}

.list-header h2 { font-size: 1.3rem; font-weight: 700; }

.lesson-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 12px 20px 24px;
}

.lesson-card {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px;
  background: #fff;
  border: 2px solid var(--gray-2);
  border-radius: var(--radius);
  cursor: pointer;
  transition: border-color .15s, box-shadow .15s;
}

.lesson-card:hover, .lesson-card:active {
  border-color: var(--green);
  box-shadow: var(--shadow);
}

.lesson-num {
  width: 48px; height: 48px;
  border-radius: 50%;
  background: var(--green-light);
  color: var(--green);
  font-size: 1.2rem;
  font-weight: 800;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}

.lesson-info { flex: 1; }
.lesson-info strong { font-size: .95rem; display: block; }
.lesson-info span { font-size: .8rem; color: var(--gray-1); }

.lesson-play { color: var(--green); font-size: 1rem; }

/* ── Lesson Screen ─────────────────────────────────────── */
.lesson-topbar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px 8px;
  flex-shrink: 0;
}

.lesson-topbar .btn-back { flex-shrink: 0; }
.btn-back:disabled { opacity: 0.25; cursor: default; }

.lesson-topbar-mid {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  flex-wrap: nowrap;
  overflow: hidden;
}

.lesson-pill {
  background: #FFF3C4;
  color: #92400E;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 999px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 160px;
}

.lesson-counter {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--gray-1);
  white-space: nowrap;
}

.exercise-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 24px 20px 0;
  overflow-y: auto;
}

/* ── Exercise shared ───────────────────────────────────── */
.ex-question {
  font-size: 1.4rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 10px;
  line-height: 1.4;
}

.ex-target {
  font-size: 2.8rem;
  font-weight: 800;
  text-align: center;
  color: var(--blue);
  margin-bottom: 8px;
  line-height: 1.2;
}

.ex-translation {
  text-align: center;
  color: var(--gray-1);
  font-size: .9rem;
  margin-bottom: 20px;
}

.spacer { flex: 1; }

.ex-img {
  display: block;
  max-width: 280px;
  max-height: 260px;
  width: auto;
  height: auto;
  margin: 14px auto 10px;
  border-radius: 16px;
  object-fit: contain;
  align-self: center;
}

.ex-example {
  display: flex;
  align-items: flex-start;
  gap: 6px;
  background: var(--gray-3);
  border-radius: 12px;
  padding: 12px 16px;
  margin: 0 0 4px;
  font-size: .95rem;
  color: var(--text);
  line-height: 1.5;
}

.ex-example-icon { flex-shrink: 0; font-size: 1rem; }

.ex-gap { height: 12px; }

/* ── Option Buttons ────────────────────────────────────── */
.options {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 16px;
}

.opt-btn {
  width: 100%;
  padding: 17px 15px;
  background: #fff;
  border: 2px solid var(--gray-2);
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  transition: border-color .12s, background .12s;
  text-align: center;
}

.opt-btn:not([disabled]):hover { border-color: var(--blue); }
.opt-btn:not([disabled]):active { background: var(--blue-light); }

.opt-btn.correct  { border-color: var(--green); background: var(--green-light); }
.opt-btn.wrong    { border-color: var(--red);   background: var(--red-light);   }

/* ── Type Answer ───────────────────────────────────────── */
.type-input {
  width: 100%;
  padding: 18px;
  font-size: 1.2rem;
  text-align: center;
  border: 2px solid var(--gray-2);
  border-radius: var(--radius);
  outline: none;
  transition: border-color .15s;
  margin-bottom: 14px;
}

.type-input:focus { border-color: var(--blue); }
.type-input:disabled { background: var(--gray-3); }

.btn-check {
  width: 100%;
  padding: 18px;
  background: var(--blue);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  font-size: 1.05rem;
  font-weight: 700;
  cursor: pointer;
  transition: background .15s;
  margin-bottom: 16px;
}

.btn-check:disabled { background: var(--gray-2); color: var(--gray-1); cursor: default; }
.btn-check:not(:disabled):hover { background: #0d9de0; }

/* ── Listening ─────────────────────────────────────────── */
.listen-hint {
  text-align: center;
  color: var(--gray-1);
  font-size: .85rem;
  margin-bottom: 20px;
}

/* ── Speaker / Mic buttons ─────────────────────────────── */
.circle-btn {
  width: 110px; height: 110px;
  border-radius: 50%;
  border: none;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  font-size: 2.6rem;
  align-self: center;
  margin: 8px auto 16px;
  transition: transform .1s;
}

.circle-btn:active { transform: scale(.94); }

.circle-btn.speaker {
  background: var(--blue-light);
  color: var(--blue);
}

.circle-btn.mic {
  background: var(--purple-light);
  color: var(--purple);
}

.circle-btn.mic.recording {
  background: var(--red-light);
  color: var(--red);
  animation: pulse 1s infinite;
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(255,75,75,.4); }
  50%       { box-shadow: 0 0 0 14px rgba(255,75,75,0); }
}

.circle-btn-label {
  text-align: center;
  font-size: .85rem;
  color: var(--gray-1);
  margin-bottom: 12px;
}

/* ── Speaking screen extras ────────────────────────────── */
.speaking-word {
  font-size: 3rem;
  font-weight: 800;
  text-align: center;
  color: var(--purple);
  margin: 12px 0 4px;
}

.btn-hear {
  background: none;
  border: none;
  color: var(--blue);
  font-size: .9rem;
  cursor: pointer;
  text-align: center;
  display: block;
  margin: 0 auto 20px;
  text-decoration: underline;
}

.recognized-text {
  text-align: center;
  font-size: .85rem;
  color: var(--gray-1);
  min-height: 20px;
  margin-bottom: 8px;
}

.btn-skip {
  background: none;
  border: none;
  color: var(--gray-1);
  font-size: .85rem;
  cursor: pointer;
  text-align: center;
  display: block;
  margin: 0 auto;
  text-decoration: underline;
}

.btn-try-later {
  background: none;
  border: none;
  color: var(--gray-1);
  font-size: .9rem;
  cursor: pointer;
  text-align: center;
  display: block;
  margin: 0 auto 24px;
  text-decoration: underline;
}

/* ── Feedback bar ──────────────────────────────────────── */
.feedback-bar {
  flex-shrink: 0;
  padding: 16px 20px 20px;
  border-top: 1px solid var(--gray-2);
}

.feedback-bar.correct { background: var(--green-light); border-color: var(--green); }
.feedback-bar.wrong   { background: var(--red-light);   border-color: var(--red);   }

.feedback-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.feedback-icon { font-size: 1.4rem; }
.feedback-label { font-weight: 700; font-size: 1rem; }
.feedback-bar.correct .feedback-label { color: var(--green-dark); }
.feedback-bar.wrong   .feedback-label { color: var(--red); }
.feedback-answer { font-size: .85rem; color: var(--gray-1); }

.btn-continue {
  width: 100%;
  padding: 16px;
  border: none;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  cursor: pointer;
  transition: opacity .15s;
}

.btn-continue:hover { opacity: .9; }
.feedback-bar.correct .btn-continue { background: var(--green); }
.feedback-bar.wrong   .btn-continue { background: var(--red);   }

/* ── Complete Screen ───────────────────────────────────── */
.complete-screen {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 40px 24px;
  gap: 20px;
  text-align: center;
}

.complete-emoji { font-size: 5rem; line-height: 1; }
.complete-title { font-size: 1.8rem; font-weight: 800; }
.complete-sub   { color: var(--gray-1); font-size: 1rem; }

.score-ring {
  position: relative;
  width: 130px; height: 130px;
  display: flex; align-items: center; justify-content: center;
}

.score-ring svg { position: absolute; top: 0; left: 0; transform: rotate(-90deg); }
.score-pct { font-size: 1.6rem; font-weight: 800; }

.xp-pill {
  display: flex; align-items: center; gap: 6px;
  background: #fff9c4;
  border: 2px solid var(--yellow);
  border-radius: 999px;
  padding: 8px 20px;
  font-weight: 700;
  font-size: .95rem;
  color: #7a6000;
}

.btn-home {
  width: 100%;
  max-width: 320px;
  padding: 16px;
  border: none;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  background: var(--green);
  cursor: pointer;
  transition: background .15s;
}

.btn-home:hover { background: var(--green-dark); }