/* Inglês+ — design system Paulo UI (dark default, light via prefers-color-scheme) */

:root {
  --bg: #0b0d11;
  --surface-1: #14171f;
  --surface-2: #1a1e29;
  --surface-3: #222738;
  --border: #252a38;
  --border-hover: #3a4058;
  --text: #eaedf3;
  --text-2: #8b95a5;
  --text-3: #5a6478;
  --accent: #34d399;
  --accent-dim: #064e3b;
  --accent-hover: #2fc78d;
  --warn: #fbbf24;
  --warn-dim: #78350f;
  --danger: #f87171;
  --danger-dim: #7f1d1d;
  --blue: #60a5fa;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f5f5f7;
    --surface-1: #ffffff;
    --surface-2: #f0f0f3;
    --surface-3: #e8e8ec;
    --border: #e2e2e8;
    --border-hover: #d0d0d8;
    --text: #1a1a1a;
    --text-2: #6b7280;
    --text-3: #9ca3af;
    --accent: #10b981;
    --accent-dim: #d1fae5;
  }
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, 'SF Pro Display', 'Inter', 'Segoe UI', sans-serif;
  font-size: 13px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

#app {
  max-width: 440px;
  margin: 0 auto;
  padding: 20px 16px 96px;
  min-height: 100vh;
}

/* ---------- header ---------- */
.page-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 16px;
}
h1 { font-size: 23px; font-weight: 800; letter-spacing: -0.5px; }
.eyebrow {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 2px;
  color: var(--text-3);
  text-transform: uppercase;
}
.streak {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-3);
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 6px 12px;
}
.streak-on { color: var(--warn); }

/* ---------- cards ---------- */
.card {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px;
  margin-bottom: 12px;
  transition: border-color 0.15s ease;
}
.card-title { font-size: 13px; font-weight: 700; margin-bottom: 10px; }

.level-card { padding: 20px 16px; }
.level-row { display: flex; align-items: center; gap: 14px; margin-bottom: 14px; }
.level-big { font-size: 36px; font-weight: 800; letter-spacing: -1px; color: var(--accent); line-height: 1; }
.level-name { font-size: 15px; font-weight: 700; }
.level-sub { font-size: 11px; color: var(--text-2); }

.progress-track {
  height: 6px;
  background: var(--surface-3);
  border-radius: 3px;
  overflow: hidden;
}
.progress-fill { height: 100%; background: var(--accent); border-radius: 3px; transition: width 0.3s ease; }
.fill-warn { background: var(--warn); }

/* ---------- rows / dots / chips ---------- */
.row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
}
.row:last-child { border-bottom: none; }
.row-label { flex: 1; font-size: 12px; }
.row-value { font-size: 12px; font-weight: 600; color: var(--text-2); }
.row-value.ok { color: var(--accent); }
.row-value.warn, .warn { color: var(--warn); }
.row-col { flex-direction: column; align-items: flex-start; }

.dot { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; }
.dot-ok { background: var(--accent); box-shadow: 0 0 6px rgba(52, 211, 153, 0.25); }
.dot-warn { background: var(--warn); box-shadow: 0 0 6px rgba(251, 191, 36, 0.25); }
.dot-bad { background: var(--danger); box-shadow: 0 0 6px rgba(248, 113, 113, 0.25); }

.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip {
  font-size: 10px;
  font-weight: 600;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 4px 8px;
  color: var(--text-2);
}
.badge {
  background: var(--accent-dim);
  color: var(--accent);
  font-size: 10px;
  font-weight: 700;
  border-radius: 8px;
  padding: 2px 8px;
  margin-left: 6px;
}

/* ---------- buttons ---------- */
button { font-family: inherit; cursor: pointer; }
.btn-primary {
  background: var(--accent);
  color: #0b0d11;
  border: none;
  border-radius: 10px;
  padding: 10px 20px;
  font-weight: 600;
  font-size: 13px;
}
.btn-primary:active { background: var(--accent-hover); }
.btn-secondary {
  background: var(--surface-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 20px;
  font-weight: 600;
  font-size: 13px;
}
.btn-danger {
  background: none;
  color: var(--danger);
  border: 1px solid var(--danger-dim);
  border-radius: 10px;
  padding: 10px 20px;
  font-weight: 600;
  font-size: 13px;
  width: 100%;
}
.btn-big { width: 100%; padding: 14px; font-size: 14px; margin-bottom: 10px; }
.btn-row { display: flex; gap: 8px; }
.btn-icon {
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text-2);
  border-radius: 10px;
  width: 34px; height: 34px;
  font-size: 14px;
  flex-shrink: 0;
}

/* ---------- quiz ---------- */
.quiz-header { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }
.quiz-progress { flex: 1; }
.quiz-count { font-size: 11px; font-weight: 600; color: var(--text-2); min-width: 34px; text-align: right; }
.quiz-meta { display: flex; gap: 6px; margin-bottom: 12px; }

.tag {
  font-size: 10px;
  font-weight: 600;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text-2);
  border-radius: 8px;
  padding: 3px 8px;
}
.tag-dim { color: var(--text-3); }
.tag-review { color: var(--blue); border-color: rgba(96, 165, 250, 0.3); }
.tag-stretch { color: var(--warn); border-color: rgba(251, 191, 36, 0.3); }

.quiz-card { padding: 20px 16px; }
.prompt { font-size: 16px; font-weight: 600; line-height: 1.5; margin-bottom: 16px; }
.prompt-pt { font-style: italic; }
.passage {
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-2);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px;
  margin-bottom: 16px;
}

.options { display: flex; flex-direction: column; gap: 8px; }
.option {
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 10px;
  padding: 13px 14px;
  font-size: 14px;
  text-align: left;
  transition: border-color 0.12s ease;
}
.option:not(:disabled):active { border-color: var(--border-hover); background: var(--surface-3); }
.option:disabled { cursor: default; opacity: 0.85; }
.opt-correct { border-color: var(--accent); background: rgba(52, 211, 153, 0.08); color: var(--accent); opacity: 1 !important; font-weight: 600; }
.opt-wrong { border-color: var(--danger); background: rgba(248, 113, 113, 0.08); color: var(--danger); opacity: 1 !important; }

.audio-box { display: flex; gap: 8px; margin-bottom: 18px; }
.btn-audio {
  flex: 1;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 10px;
  padding: 14px;
  font-size: 14px;
  font-weight: 600;
}
.btn-audio-slow { flex: 0 0 auto; padding: 14px 16px; color: var(--text-2); }

.typed-box { display: flex; flex-direction: column; gap: 10px; }
.typed-box input {
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 10px;
  padding: 13px 14px;
  font-size: 15px;
  font-family: inherit;
  outline: none;
}
.typed-box input:focus { border-color: var(--border-hover); }
.input-correct { border-color: var(--accent) !important; }
.input-wrong { border-color: var(--danger) !important; }

/* ---------- feedback ---------- */
.feedback { border-width: 1px; }
.fb-correct { border-color: rgba(52, 211, 153, 0.4); }
.fb-wrong { border-color: rgba(248, 113, 113, 0.4); }
.fb-title { font-size: 15px; font-weight: 700; margin-bottom: 8px; }
.fb-correct .fb-title { color: var(--accent); }
.fb-wrong .fb-title { color: var(--danger); }
.fb-expected { font-size: 13px; margin-bottom: 8px; }
.fb-explain { font-size: 12px; color: var(--text-2); line-height: 1.6; margin-bottom: 8px; }
.fb-note { font-size: 11px; color: var(--blue); margin-bottom: 8px; }
.feedback .btn-big { margin-bottom: 0; margin-top: 8px; }

/* ---------- resultado ---------- */
.result { text-align: center; padding-top: 32px; }
.result-score { font-size: 48px; font-weight: 800; letter-spacing: -1px; color: var(--accent); line-height: 1; }
.result-label { font-size: 12px; color: var(--text-2); margin: 8px 0 24px; }
.result .card { text-align: left; }
.result-msg { font-size: 13px; color: var(--text-2); margin: 16px 0; }

/* ---------- progresso ---------- */
.stat-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; margin-bottom: 12px; }
.stat { text-align: center; padding: 14px 8px; margin-bottom: 0; }
.stat-num { font-size: 26px; font-weight: 800; letter-spacing: -0.5px; line-height: 1.1; }
.stat-label { font-size: 10px; font-weight: 600; letter-spacing: 1px; text-transform: uppercase; color: var(--text-3); margin-top: 4px; }

.skill-row { display: flex; align-items: center; gap: 10px; padding: 7px 0; }
.skill-row .row-label { flex: 0 0 90px; }
.skill-track { flex: 1; }
.skill-row .row-value { min-width: 36px; text-align: right; }

/* ---------- ajustes ---------- */
.row-toggle { cursor: pointer; }
.row-toggle input { accent-color: var(--accent); width: 18px; height: 18px; }
select {
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  padding: 6px 10px;
  font-size: 12px;
  font-family: inherit;
}

.hint-card { border-color: rgba(52, 211, 153, 0.25); }
.hint-text { font-size: 12px; color: var(--text-2); line-height: 1.6; margin-bottom: 8px; }
.empty { text-align: center; color: var(--text-2); padding: 60px 20px; font-size: 14px; }

/* ---------- bottom nav ---------- */
#nav {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  background: color-mix(in srgb, var(--surface-1) 90%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-around;
  padding: 6px 0;
  padding-bottom: max(8px, env(safe-area-inset-bottom));
  z-index: 10;
}
.nav-item {
  background: none;
  border: none;
  color: var(--text-3);
  font-size: 10px;
  font-weight: 500;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  padding: 4px 16px;
}
.nav-item .nav-icon { font-size: 16px; }
.nav-item.active { color: var(--accent); font-weight: 700; }