/* grammar.css — LOGOS Grammar Engine */

/* ── Shell ── */
.logos-shell {
  display: flex;
  flex-direction: column;
  min-height: 100%;
  max-width: 560px;
  margin: 0 auto;
  padding: 1rem 1rem 5rem;
  color: #e2e8f0;
}

/* ── Header ── */
.logos-header {
  text-align: center;
  padding: 1.5rem 0 1.2rem;
}
.logos-logo { font-size: 3rem; line-height: 1; margin-bottom: 0.4rem; }
.logos-title {
  font-size: 1.6rem;
  font-weight: 800;
  letter-spacing: 2px;
  color: #e2e8f0;
  margin: 0 0 0.25rem;
}
.logos-sub { font-size: 0.85rem; color: #64748b; margin: 0 0 1rem; }
.logos-hint {
  font-size: 0.78rem;
  color: #475569;
  text-align: center;
  margin-top: 1rem;
}
.logos-back {
  background: transparent;
  border: 1px solid rgba(255,255,255,0.12);
  color: #94a3b8;
  font-size: 0.82rem;
  padding: 0.35rem 0.75rem;
  border-radius: 8px;
  cursor: pointer;
  font-family: inherit;
  transition: all 0.15s;
}
.logos-back:hover { background: rgba(255,255,255,0.07); color: #e2e8f0; }
.logos-start-btn {
  display: block;
  width: 100%;
  margin-top: 1.2rem;
  padding: 0.85rem;
  background: linear-gradient(135deg, #0ea5e9, #00d4ff);
  color: #0f172a;
  font-weight: 800;
  font-size: 0.95rem;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  font-family: inherit;
  transition: opacity 0.15s, transform 0.1s;
}
.logos-start-btn:hover { opacity: 0.9; }
.logos-start-btn:active { transform: scale(0.98); }

/* ── Level cards grid ── */
.gl-levels {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
}
.gl-level-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 16px;
  padding: 1rem;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, transform 0.1s;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.gl-level-card:hover { background: rgba(255,255,255,0.08); border-color: rgba(255,255,255,0.15); }
.gl-level-card:active { transform: scale(0.97); }
.glc-ring {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(255,255,255,0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
}
.glc-ring-icon { font-size: 1.5rem; }
.glc-body { display: flex; flex-direction: column; gap: 0.15rem; }
.glc-level {
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 1px;
  color: #00d4ff;
  text-transform: uppercase;
}
.glc-label { font-size: 0.95rem; font-weight: 700; color: #e2e8f0; }
.glc-desc { font-size: 0.75rem; color: #64748b; }
.glc-prog {
  height: 4px;
  background: rgba(255,255,255,0.08);
  border-radius: 99px;
  overflow: hidden;
  margin-top: 0.25rem;
}
.glc-prog-fill {
  height: 100%;
  background: linear-gradient(90deg, #0ea5e9, #00d4ff);
  border-radius: 99px;
  transition: width 0.4s ease;
}
.glc-arrow {
  font-size: 1rem;
  color: #475569;
  align-self: flex-end;
  margin-top: auto;
}

/* ── Rules list ── */
.grl-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}
.grl-level-badge {
  font-size: 0.75rem;
  font-weight: 800;
  padding: 4px 12px;
  border-radius: 99px;
  border: 1px solid;
  letter-spacing: 0.5px;
}
.grl-list { display: flex; flex-direction: column; gap: 0.5rem; }
.grl-category { margin-top: 1rem; }
.grl-cat-label {
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: #475569;
  margin-bottom: 0.5rem;
  padding-left: 0.25rem;
}
.grl-rule-card {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: 12px;
  padding: 0.75rem 1rem;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
  width: 100%;
  text-align: left;
  font-family: inherit;
  color: #e2e8f0;
}
.grl-rule-card:hover { background: rgba(255,255,255,0.08); border-color: rgba(255,255,255,0.12); }
.grl-icon { font-size: 1.3rem; flex-shrink: 0; }
.grl-info { flex: 1; min-width: 0; }
.grl-title { font-size: 0.9rem; font-weight: 700; }
.grl-sub { font-size: 0.75rem; color: #64748b; margin-top: 2px; }
.grl-stars { font-size: 0.8rem; letter-spacing: 1px; flex-shrink: 0; }
.grl-progress {
  margin-top: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
.grl-progbar-wrap { display: flex; align-items: center; gap: 0.5rem; }
.grl-progbar-fill {
  flex: 1;
  height: 4px;
  background: rgba(255,255,255,0.08);
  border-radius: 99px;
  overflow: hidden;
}

/* ── Rule detail ── */
.rule-detail-shell {}
.rd-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.2rem;
}
.rd-stars { font-size: 1.2rem; letter-spacing: 2px; }
.rd-hero { text-align: center; padding: 1.5rem 0 1rem; }
.rd-icon { font-size: 3rem; margin-bottom: 0.5rem; }
.rd-level-tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 1px;
  padding: 3px 10px;
  border-radius: 99px;
  background: rgba(14,165,233,0.15);
  color: #0ea5e9;
  margin-bottom: 0.5rem;
}
.rd-title { font-size: 1.3rem; font-weight: 800; margin: 0.25rem 0; }
.rd-sub { font-size: 0.85rem; color: #94a3b8; }
.rd-desc {
  font-size: 0.9rem;
  color: #cbd5e1;
  line-height: 1.6;
  background: rgba(255,255,255,0.04);
  border-radius: 12px;
  padding: 1rem;
  margin-top: 0.75rem;
}
.rd-section-label {
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: #475569;
  margin: 1.2rem 0 0.5rem;
}
.rd-contrast {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}
.rd-contrast-label {
  font-size: 0.7rem;
  font-weight: 700;
  color: #64748b;
  margin-bottom: 0.25rem;
}
.rd-contrast-text {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 10px;
  padding: 0.65rem 0.75rem;
  font-size: 0.88rem;
  color: #e2e8f0;
}
.rd-error-box {
  background: rgba(239,68,68,0.07);
  border: 1px solid rgba(239,68,68,0.2);
  border-radius: 12px;
  padding: 0.75rem 1rem;
  margin-bottom: 0.5rem;
}
.rd-error-label { font-size: 0.7rem; font-weight: 800; color: #f87171; margin-bottom: 0.4rem; letter-spacing: 1px; }
.rd-error-wrong { font-size: 0.85rem; color: #f87171; text-decoration: line-through; margin-bottom: 0.2rem; }
.rd-error-right { font-size: 0.85rem; color: #4ade80; }
.rd-error-tip { font-size: 0.78rem; color: #94a3b8; margin-top: 0.35rem; font-style: italic; }

/* ── Rule examples ── */
.rule-examples { display: flex; flex-direction: column; gap: 0.5rem; margin-top: 0.5rem; }
.rule-example {
  background: rgba(255,255,255,0.04);
  border-left: 3px solid #00d4ff;
  border-radius: 0 10px 10px 0;
  padding: 0.6rem 0.85rem;
  font-size: 0.88rem;
  color: #e2e8f0;
  line-height: 1.5;
}
.rex-tr { color: #94a3b8; font-size: 0.8rem; margin-top: 2px; }
.rex-en { color: #e2e8f0; }

/* ── Drill screen ── */
.drill-shell {}
.drill-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
  gap: 0.75rem;
}
.drill-prog-label { font-size: 0.78rem; color: #64748b; white-space: nowrap; }
.drill-progbar-track {
  flex: 1;
  height: 5px;
  background: rgba(255,255,255,0.08);
  border-radius: 99px;
  overflow: hidden;
}
.drill-progbar-fill {
  height: 100%;
  background: linear-gradient(90deg, #0ea5e9, #00d4ff);
  border-radius: 99px;
  transition: width 0.3s ease;
}
.drill-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 16px;
  padding: 1.25rem;
  margin-bottom: 1rem;
}
.drill-type-badge {
  display: inline-block;
  font-size: 0.65rem;
  font-weight: 800;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  padding: 3px 9px;
  border-radius: 99px;
  background: rgba(14,165,233,0.15);
  color: #0ea5e9;
  margin-bottom: 0.75rem;
}
.drill-rule-icon { font-size: 1.5rem; margin-bottom: 0.4rem; }
.drill-rule-name { font-size: 0.8rem; font-weight: 700; color: #94a3b8; }
.drill-rule-context { font-size: 0.75rem; color: #475569; margin-top: 2px; }
.drill-level-tag {
  display: inline-block;
  font-size: 0.65rem;
  padding: 2px 8px;
  border-radius: 99px;
  font-weight: 700;
  background: rgba(255,255,255,0.07);
  color: #64748b;
  margin-top: 0.4rem;
}
.drill-prompt {
  font-size: 1rem;
  color: #e2e8f0;
  line-height: 1.6;
  margin: 1rem 0 0.75rem;
  font-weight: 600;
}
.drill-actions {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-top: 0.75rem;
}
.drill-submit-btn, .drill-next-btn {
  flex: 1;
  padding: 0.75rem;
  background: linear-gradient(135deg, #0ea5e9, #00d4ff);
  color: #0f172a;
  font-weight: 800;
  font-size: 0.9rem;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  font-family: inherit;
  transition: opacity 0.15s;
}
.drill-submit-btn:hover, .drill-next-btn:hover { opacity: 0.85; }
.drill-clear-btn {
  padding: 0.75rem 1rem;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  color: #94a3b8;
  font-size: 0.85rem;
  border-radius: 12px;
  cursor: pointer;
  font-family: inherit;
  transition: background 0.15s;
}
.drill-clear-btn:hover { background: rgba(255,255,255,0.1); }

/* ── Forge (word bank) ── */
.forge-word-bank {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 0.75rem 0;
}
.forge-word, .gram-forge-word-btn {
  padding: 0.4rem 0.8rem;
  background: rgba(255,255,255,0.07);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 99px;
  font-size: 0.85rem;
  color: #e2e8f0;
  cursor: pointer;
  font-family: inherit;
  transition: background 0.15s, opacity 0.15s;
}
.forge-word:hover, .gram-forge-word-btn:hover { background: rgba(255,255,255,0.12); }
.forge-word[disabled], .gram-forge-word-btn[disabled] { opacity: 0.3; cursor: default; }
.forge-answer-box {
  min-height: 48px;
  background: rgba(255,255,255,0.03);
  border: 2px dashed rgba(255,255,255,0.12);
  border-radius: 12px;
  padding: 0.5rem 0.75rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  align-items: center;
  margin: 0.5rem 0;
  transition: border-color 0.2s;
}
.forge-answer-box.active { border-color: rgba(14,165,233,0.4); }
.forge-placed, .forge-badge {
  padding: 0.3rem 0.7rem;
  background: rgba(14,165,233,0.15);
  border: 1px solid rgba(14,165,233,0.3);
  border-radius: 99px;
  font-size: 0.82rem;
  color: #0ea5e9;
  font-weight: 600;
}

/* ── Mutate drill ── */
.mutate-sentence {
  font-size: 1rem;
  color: #e2e8f0;
  line-height: 1.6;
  margin-bottom: 0.75rem;
  padding: 0.75rem;
  background: rgba(255,255,255,0.04);
  border-radius: 10px;
}
.mutate-options, .clash-options, .decode-options {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.mutate-opt, .gram-mutate-pick-btn,
.clash-btn, .gram-clash-pick-btn,
.decode-opt, .gram-decode-pick-btn {
  width: 100%;
  padding: 0.75rem 1rem;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 12px;
  font-size: 0.9rem;
  color: #e2e8f0;
  cursor: pointer;
  font-family: inherit;
  text-align: left;
  transition: background 0.15s, border-color 0.15s;
}
.mutate-opt:hover, .gram-mutate-pick-btn:hover,
.clash-btn:hover, .gram-clash-pick-btn:hover,
.decode-opt:hover, .gram-decode-pick-btn:hover {
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.18);
}
.mutate-badge, .clash-badge, .decode-badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 99px;
  margin-right: 0.4rem;
  background: rgba(255,255,255,0.08);
  color: #94a3b8;
}

/* ── Clash drill ── */
.clash-text {
  font-size: 1.05rem;
  font-weight: 700;
  color: #e2e8f0;
  margin-bottom: 0.75rem;
  text-align: center;
}
.clash-label { font-size: 0.78rem; color: #64748b; text-align: center; margin-bottom: 0.5rem; }

/* ── Decode drill ── */
.decode-sentence {
  font-size: 0.95rem;
  color: #e2e8f0;
  line-height: 1.7;
  margin-bottom: 0.75rem;
  padding: 0.75rem;
  background: rgba(255,255,255,0.04);
  border-radius: 10px;
}
.decode-highlight {
  background: rgba(251,191,36,0.2);
  color: #fbbf24;
  border-radius: 4px;
  padding: 1px 4px;
  font-weight: 700;
}

/* ── DNA drill ── */
.dna-strand {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  justify-content: center;
  margin: 0.75rem 0;
}
.dna-base, .gram-dna-base {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 0.5rem 0.65rem;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 10px;
  cursor: pointer;
  font-family: inherit;
  transition: background 0.15s;
  min-width: 52px;
}
.dna-base:hover, .gram-dna-base:hover { background: rgba(255,255,255,0.12); }
.dna-word { font-size: 0.88rem; font-weight: 700; color: #e2e8f0; }
.dna-role { font-size: 0.62rem; color: #64748b; font-weight: 600; letter-spacing: 0.5px; }
.dna-tap-hint { font-size: 0.75rem; color: #475569; text-align: center; margin-top: 0.4rem; }

/* ── Transform drill ── */
.transform-input, .gram-transform-input {
  width: 100%;
  padding: 0.75rem 1rem;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 12px;
  font-size: 0.95rem;
  color: #e2e8f0;
  font-family: inherit;
  transition: border-color 0.2s;
  box-sizing: border-box;
}
.transform-input:focus, .gram-transform-input:focus {
  outline: none;
  border-color: rgba(14,165,233,0.5);
  background: rgba(255,255,255,0.07);
}
.transform-badge {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 3px 9px;
  border-radius: 99px;
  background: rgba(167,139,250,0.15);
  color: #a78bfa;
  display: inline-block;
  margin-bottom: 0.5rem;
}

/* ── Formula ── */
.formula-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  padding: 0.75rem;
  background: rgba(255,255,255,0.04);
  border-radius: 10px;
  margin: 0.5rem 0;
}
.formula-part {
  padding: 3px 10px;
  background: rgba(14,165,233,0.12);
  border: 1px solid rgba(14,165,233,0.25);
  border-radius: 6px;
  font-size: 0.82rem;
  color: #0ea5e9;
  font-weight: 600;
}
.formula-op { font-size: 0.9rem; color: #475569; font-weight: 700; }

/* ── Result banners ── */
.result-banner, .correct-banner, .wrong-banner {
  border-radius: 12px;
  padding: 1rem 1.25rem;
  margin: 0.75rem 0;
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
}
.correct-banner {
  background: rgba(74,222,128,0.1);
  border: 1px solid rgba(74,222,128,0.25);
}
.wrong-banner {
  background: rgba(248,113,113,0.1);
  border: 1px solid rgba(248,113,113,0.25);
}
.result-icon { font-size: 1.5rem; flex-shrink: 0; }
.result-title {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}
.correct-banner .result-title { color: #4ade80; }
.wrong-banner .result-title { color: #f87171; }
.result-correct {
  font-size: 0.85rem;
  color: #e2e8f0;
  margin-bottom: 0.25rem;
}
.result-tip { font-size: 0.8rem; color: #94a3b8; font-style: italic; }

/* ── Rule complete card ── */
.rule-complete-card {
  text-align: center;
  padding: 2rem 1rem;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 20px;
  margin: 1rem 0;
}
.rc-icon { font-size: 3.5rem; margin-bottom: 0.5rem; }
.rc-title { font-size: 1.3rem; font-weight: 800; color: #e2e8f0; margin-bottom: 0.25rem; }
.rc-rule { font-size: 0.9rem; color: #94a3b8; margin-bottom: 0.75rem; }
.rc-stars { font-size: 1.4rem; letter-spacing: 4px; margin-bottom: 0.75rem; }
.rc-xp {
  display: inline-block;
  font-size: 1.1rem;
  font-weight: 800;
  color: #fbbf24;
  background: rgba(251,191,36,0.12);
  padding: 4px 16px;
  border-radius: 99px;
  margin-bottom: 1rem;
}
.rc-level-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 99px;
  margin-bottom: 0.5rem;
}
.rc-level-prog {
  height: 6px;
  background: rgba(255,255,255,0.08);
  border-radius: 99px;
  overflow: hidden;
  margin: 0.75rem 0;
}
.rc-actions {
  display: flex;
  gap: 0.5rem;
  justify-content: center;
  margin-top: 1rem;
  flex-wrap: wrap;
}

/* ── Reg bars (mastery) ── */
.reg-bars { display: flex; flex-direction: column; gap: 0.5rem; margin: 0.75rem 0; }
.reg-bar-wrap { display: flex; align-items: center; gap: 0.6rem; }
.reg-bar-label { font-size: 0.78rem; color: #94a3b8; min-width: 80px; flex-shrink: 0; }
.reg-bar-track {
  flex: 1;
  height: 6px;
  background: rgba(255,255,255,0.08);
  border-radius: 99px;
  overflow: hidden;
}
.reg-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, #0ea5e9, #00d4ff);
  border-radius: 99px;
  transition: width 0.4s ease;
}
.reg-bar-val { font-size: 0.75rem; color: #64748b; min-width: 32px; text-align: right; }

/* ── Utility buttons ── */
.btn { padding: 0.6rem 1.2rem; border-radius: 10px; font-size: 0.88rem; font-weight: 700; cursor: pointer; font-family: inherit; border: none; transition: opacity 0.15s; }
.btn-primary { background: linear-gradient(135deg, #0ea5e9, #00d4ff); color: #0f172a; }
.btn-ghost { background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.1); color: #94a3b8; }
.btn-sm { padding: 0.4rem 0.85rem; font-size: 0.8rem; }
.btn:hover { opacity: 0.85; }
.gram-continue-btn, .gram-repeat-btn, .gram-speak-btn,
.gram-forge-submit-btn, .gram-forge-clear-btn,
.gram-transform-submit-btn {
  padding: 0.65rem 1.2rem;
  border-radius: 10px;
  font-size: 0.88rem;
  font-weight: 700;
  cursor: pointer;
  font-family: inherit;
  border: none;
  transition: opacity 0.15s;
}
.gram-continue-btn, .gram-forge-submit-btn, .gram-transform-submit-btn {
  background: linear-gradient(135deg, #0ea5e9, #00d4ff);
  color: #0f172a;
}
.gram-repeat-btn, .gram-forge-clear-btn {
  background: rgba(255,255,255,0.07);
  border: 1px solid rgba(255,255,255,0.12);
  color: #94a3b8;
}
.gram-speak-btn {
  background: rgba(167,139,250,0.15);
  border: 1px solid rgba(167,139,250,0.3);
  color: #a78bfa;
}
.gram-continue-btn:hover, .gram-forge-submit-btn:hover,
.gram-transform-submit-btn:hover, .gram-repeat-btn:hover,
.gram-forge-clear-btn:hover, .gram-speak-btn:hover { opacity: 0.8; }