/* ── Variables ── */
:root {
  --bg:       #0d0f0e;
  --surface:  #141716;
  --surface2: #1c201e;
  --border:   #252a27;
  --accent:   #b8e04a;
  --accent2:  #4ae0b8;
  --accent3:  #e04a7a;
  --text:     #e8ede9;
  --text2:    #8a9490;
  --text3:    #5a6460;
  --fr:       #e8c547;
  --it:       #4aade0;
  --en:       #e04a4a;
  --pt:       #4ae0b8;
  --radius:   .75rem;
  --font-body:    'Syne', system-ui, sans-serif;
  --font-serif:   'Playfair Display', Georgia, serif;
  --font-mono:    'DM Mono', ui-monospace, monospace;
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.5;
  min-height: 100vh;
  overflow-x: hidden;
}
button, input, textarea { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }
button:focus-visible, input:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
a { color: inherit; text-decoration: none; }
strong { font-weight: 700; }
em { font-style: italic; }

/* ── Noise overlay ── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.03'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 1000;
  opacity: .4;
}

/* ── Animations ── */
@keyframes fadeUp  { from { opacity:0; transform:translateY(20px); } to { opacity:1; transform:translateY(0); } }
@keyframes fadeIn  { from { opacity:0; } to { opacity:1; } }
@keyframes spin    { to { transform: rotate(360deg); } }

/* ─────────────────────────────────────────
   LOGIN
───────────────────────────────────────── */
.login-view {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 2rem;
}
.login-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 1.5rem;
  padding: 3rem;
  width: 100%;
  max-width: 400px;
  animation: fadeUp .6s ease both;
}
.login-logo {
  display: flex;
  align-items: baseline;
  gap: .6rem;
  margin-bottom: 2.5rem;
}
.login-logo-mark {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 2.2rem;
  color: var(--accent);
  line-height: 1;
}
.login-logo-text {
  font-size: .72rem;
  color: var(--text3);
  letter-spacing: .2em;
  text-transform: uppercase;
  font-weight: 600;
}
.login-field-label {
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .15em;
  text-transform: uppercase;
  color: var(--text3);
  display: block;
  margin-bottom: .5rem;
}
.login-input {
  width: 100%;
  background: var(--surface2);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: .85rem 1rem;
  font-size: 1rem;
  color: var(--text);
  outline: none;
  transition: border-color .2s;
  margin-bottom: 1.25rem;
}
.login-input:focus { border-color: var(--accent); }
.login-input::placeholder { color: var(--text3); }
.login-submit {
  width: 100%;
  background: var(--accent);
  color: var(--bg);
  border-radius: var(--radius);
  padding: .9rem;
  font-family: var(--font-body);
  font-size: .95rem;
  font-weight: 700;
  letter-spacing: .04em;
  transition: background .2s, transform .1s;
}
.login-submit:hover { background: #cff060; transform: translateY(-1px); }
.login-error {
  margin-top: 1rem;
  padding: .75rem 1rem;
  background: rgba(224,74,74,.1);
  border: 1px solid rgba(224,74,74,.3);
  border-radius: var(--radius);
  font-size: .82rem;
  color: var(--en);
  font-family: var(--font-mono);
}
.login-error:empty { display: none; }

/* ─────────────────────────────────────────
   INDEX / CONFIG
───────────────────────────────────────── */
.config-view {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  position: relative;
}
.config-view::after {
  content: 'SL';
  position: fixed;
  bottom: -2rem;
  right: -1rem;
  font-family: var(--font-serif);
  font-size: 18rem;
  color: var(--surface2);
  font-weight: 700;
  pointer-events: none;
  line-height: 1;
  z-index: 0;
}
.config-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 1.5rem;
  padding: 2.5rem;
  width: 100%;
  max-width: 520px;
  position: relative;
  z-index: 1;
  animation: fadeUp .6s ease both;
}
.config-logo {
  display: flex;
  align-items: baseline;
  gap: .6rem;
  margin-bottom: 2rem;
}
.config-logo-mark { font-family: var(--font-serif); font-style: italic; font-size: 1.8rem; color: var(--accent); }
.config-logo-text  { font-size: .72rem; color: var(--text3); letter-spacing: .2em; text-transform: uppercase; font-weight: 600; }

/* Profile bar */
.profile-bar {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: .75rem 1rem;
  margin-bottom: 2rem;
}
.profile-avatar {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: .9rem;
  color: var(--bg);
  flex-shrink: 0;
}
.profile-info { flex: 1; min-width: 0; }
.profile-name { font-size: .9rem; font-weight: 600; }
.profile-sub  { font-size: .72rem; color: var(--text3); font-family: var(--font-mono); }
.streak-badge {
  background: var(--bg);
  border: 1px solid var(--accent);
  border-radius: .5rem;
  padding: .3rem .65rem;
  font-size: .75rem;
  color: var(--accent);
  font-family: var(--font-mono);
  white-space: nowrap;
}

/* Section label */
.section-label {
  font-size: .7rem;
  letter-spacing: .15em;
  text-transform: uppercase;
  color: var(--text3);
  font-weight: 600;
  margin-bottom: .75rem;
}

/* Language grid */
.lang-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .75rem;
  margin-bottom: 2rem;
}
.lang-btn {
  background: var(--surface2);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  cursor: pointer;
  transition: border-color .2s, background .2s;
  text-align: left;
  color: var(--text);
}
.lang-btn:hover { border-color: var(--text3); }
.lang-btn.lang-active { border-color: var(--accent); background: rgba(184,224,74,.07); }
.lang-flag { font-size: 1.6rem; margin-bottom: .3rem; display: block; line-height: 1; }
.lang-name  { font-size: .9rem; font-weight: 600; }
.lang-level { font-size: .7rem; font-family: var(--font-mono); margin-top: .2rem; color: var(--text3); }
.lang-btn[data-lang="frances"]  .lang-level { color: var(--fr); }
.lang-btn[data-lang="italiano"] .lang-level { color: var(--it); }
.lang-btn[data-lang="ingles"]   .lang-level { color: var(--en); }
.lang-btn[data-lang="portugues"].lang-level { color: var(--pt); }
.lang-btn.lang-active .lang-level { opacity: 1; }

/* Duration grid */
.duration-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: .75rem;
  margin-bottom: 2.5rem;
}
.dur-btn {
  background: var(--surface2);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem .5rem;
  cursor: pointer;
  transition: border-color .2s, background .2s;
  text-align: center;
  color: var(--text);
}
.dur-btn:hover { border-color: var(--text3); }
.dur-btn.dur-active { border-color: var(--accent2); background: rgba(74,224,184,.06); }
.dur-min  { font-family: var(--font-serif); font-size: 1.5rem; font-weight: 700; }
.dur-unit { font-size: .65rem; color: var(--text3); text-transform: uppercase; letter-spacing: .1em; margin-top: .2rem; }
.dur-desc { font-size: .68rem; color: var(--text3); font-family: var(--font-mono); margin-top: .4rem; }
.dur-btn.dur-active .dur-min { color: var(--accent2); }

/* Start button */
.btn-start {
  width: 100%;
  background: var(--accent);
  color: var(--bg);
  border-radius: var(--radius);
  padding: 1rem 2rem;
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: .04em;
  transition: background .2s, transform .15s, box-shadow .2s;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
}
.btn-start:hover { background: #cff060; transform: translateY(-1px); box-shadow: 0 8px 24px rgba(184,224,74,.25); }
.btn-start:active { transform: scale(0.99); }
.btn-start.loading { opacity: .5; pointer-events: none; }

/* Recent sessions */
.recent-section { margin-top: 2rem; }
.recent-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: .75rem 0;
  border-bottom: 1px solid var(--border);
  font-size: .85rem;
}
.recent-item:last-child { border-bottom: none; }
.recent-date { font-family: var(--font-mono); font-size: .7rem; color: var(--text3); }
.recent-dur  { font-size: .8rem; color: var(--text2); margin-top: .1rem; }
.recent-score { font-family: var(--font-serif); font-size: 1.4rem; font-weight: 700; }
.score-good  { color: var(--accent); }
.score-ok    { color: var(--fr); }
.score-bad   { color: var(--accent3); }

/* ─────────────────────────────────────────
   LESSON SHELL
───────────────────────────────────────── */
.lesson-shell { display: flex; flex-direction: column; min-height: 100vh; }

.lesson-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: .9rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  position: sticky;
  top: 0;
  z-index: 100;
}
.lesson-lang-badge {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: .5rem;
  padding: .3rem .7rem;
  font-size: .75rem;
  font-family: var(--font-mono);
  display: flex;
  align-items: center;
  gap: .4rem;
  white-space: nowrap;
}
.lesson-lang-badge.fr { color: var(--fr); }
.lesson-lang-badge.it { color: var(--it); }
.lesson-lang-badge.en { color: var(--en); }
.lesson-lang-badge.pt { color: var(--pt); }
.lesson-header-title { flex: 1; font-size: .9rem; font-weight: 600; min-width: 0; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.timer-display {
  font-family: var(--font-mono);
  font-size: .85rem;
  color: var(--accent2);
  background: var(--surface2);
  padding: .3rem .7rem;
  border-radius: .5rem;
  border: 1px solid var(--border);
  white-space: nowrap;
}
.timer-display.warn { color: var(--accent3); border-color: var(--accent3); }

.lesson-progress-bar { height: 2px; background: var(--border); }
.lesson-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  transition: width .5s ease;
  width: 0%;
}

.lesson-body {
  flex: 1;
  padding: 1.5rem;
  max-width: 700px;
  margin: 0 auto;
  width: 100%;
  overflow-y: auto;
}

/* Block header */
.block-header {
  display: flex;
  align-items: center;
  gap: .75rem;
  margin-bottom: 1.5rem;
  animation: fadeUp .4s ease both;
}
.block-type-badge {
  font-size: .65rem;
  letter-spacing: .15em;
  text-transform: uppercase;
  padding: .3rem .7rem;
  border-radius: .4rem;
  font-weight: 700;
  font-family: var(--font-mono);
  white-space: nowrap;
}
.badge-srs      { background: rgba(232,197,71,.12); color: var(--fr);     border: 1px solid rgba(232,197,71,.3); }
.badge-input    { background: rgba(74,173,224,.12);  color: var(--it);     border: 1px solid rgba(74,173,224,.3); }
.badge-gramatica{ background: rgba(184,224,74,.12);  color: var(--accent); border: 1px solid rgba(184,224,74,.3); }
.badge-output   { background: rgba(224,74,122,.12);  color: var(--accent3);border: 1px solid rgba(224,74,122,.3); }
.badge-falso    { background: rgba(224,74,74,.12);   color: var(--en);     border: 1px solid rgba(224,74,74,.3); }
.block-title-main { font-size: 1.1rem; font-weight: 700; }
.block-num { margin-left: auto; font-size: .75rem; color: var(--text3); font-family: var(--font-mono); white-space: nowrap; }

/* ── SRS Flashcard ── */
.flashcard-wrap {
  perspective: 1000px;
  height: 220px;
  margin-bottom: 1.5rem;
  cursor: pointer;
  animation: fadeUp .4s .1s ease both;
}
.flashcard {
  width: 100%; height: 100%;
  transform-style: preserve-3d;
  transition: transform .5s cubic-bezier(.4,0,.2,1);
  position: relative;
}
.flashcard.flipped { transform: rotateY(180deg); }
.card-face {
  position: absolute; inset: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 1rem;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  gap: .75rem;
  backface-visibility: hidden;
  padding: 2rem;
  text-align: center;
}
.card-back { transform: rotateY(180deg); background: var(--surface2); }
.card-word { font-family: var(--font-serif); font-size: 2.5rem; font-weight: 700; color: var(--accent); }
.card-hint { font-size: .8rem; color: var(--text3); font-family: var(--font-mono); }
.card-tap  { font-size: .7rem; color: var(--text3); }
.card-answer { font-family: var(--font-serif); font-size: 1.8rem; font-weight: 700; color: var(--accent2); }
.card-example { font-family: var(--font-serif); font-size: .85rem; color: var(--text2); font-style: italic; }
.card-tip { font-size: .72rem; color: var(--text3); font-family: var(--font-mono); }

.srs-feedback-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: .75rem;
  animation: fadeUp .3s ease both;
}
.srs-btn {
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: .75rem;
  cursor: pointer;
  text-align: center;
  transition: all .2s;
  font-family: var(--font-body);
  color: var(--text);
  font-size: .8rem;
  font-weight: 600;
}
.srs-btn:disabled { opacity: .4; pointer-events: none; }
.srs-easy { background: rgba(184,224,74,.08); border-color: rgba(184,224,74,.4); }
.srs-easy:hover { background: rgba(184,224,74,.2); border-color: var(--accent); }
.srs-hard { background: rgba(232,197,71,.08); border-color: rgba(232,197,71,.4); }
.srs-hard:hover { background: rgba(232,197,71,.2); border-color: var(--fr); }
.srs-fail { background: rgba(224,74,122,.08); border-color: rgba(224,74,122,.4); }
.srs-fail:hover { background: rgba(224,74,122,.2); border-color: var(--accent3); }
.srs-btn-icon  { font-size: 1.2rem; margin-bottom: .2rem; display: block; }
.srs-btn-sub   { font-size: .65rem; color: var(--text3); font-family: var(--font-mono); margin-top: .3rem; display: block; }
.srs-counter   { font-family: var(--font-mono); font-size: .75rem; color: var(--text3); text-align: right; margin-bottom: .75rem; }
.srs-confirmed { text-align: center; padding: .75rem; font-family: var(--font-mono); font-size: .8rem; margin-top: .5rem; }

/* ── Reading block ── */
.reading-text {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 1rem;
  padding: 1.5rem;
  font-family: var(--font-serif);
  font-size: 1rem;
  line-height: 1.8;
  margin-bottom: 1.25rem;
  animation: fadeUp .4s .1s ease both;
}
.hl {
  color: var(--accent2);
  text-decoration: underline;
  text-decoration-style: dotted;
  cursor: help;
  position: relative;
}
.tooltip {
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: .5rem;
  padding: .4rem .7rem;
  font-size: .72rem;
  font-family: var(--font-mono);
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition: opacity .15s;
  z-index: 50;
  color: var(--text);
  margin-bottom: .4rem;
}
.hl:hover .tooltip { opacity: 1; }

.keywords-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .5rem;
  margin-bottom: 1.25rem;
  animation: fadeUp .4s .15s ease both;
}
.keyword-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: .6rem;
  padding: .6rem .9rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: .5rem;
}
.kw-word { font-family: var(--font-mono); font-size: .8rem; color: var(--accent2); }
.kw-def  { font-size: .75rem; color: var(--text3); text-align: right; }

.comp-questions { display: flex; flex-direction: column; gap: .75rem; }
.comp-q {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  animation: fadeUp .4s ease both;
}
.comp-q-text {
  padding: .85rem 1rem;
  font-size: .85rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background .15s;
  user-select: none;
}
.comp-q-text:hover { background: var(--surface2); }
.comp-q-arrow { color: var(--text3); transition: transform .2s; }
.comp-q.open .comp-q-arrow { transform: rotate(180deg); }
.comp-q-answer {
  display: none;
}
.comp-q.open .comp-q-answer {
  display: block;
}
.comp-q-answer-inner {
  padding: .75rem 1rem;
  border-top: 1px solid var(--border);
  font-size: .82rem;
  color: var(--text2);
  font-family: var(--font-mono);
}

/* ── Grammar block ── */
.grammar-card {
  background: var(--surface);
  border: 1px solid var(--accent);
  border-radius: 1rem;
  padding: 1.5rem;
  margin-bottom: 1rem;
  animation: fadeUp .4s .1s ease both;
  position: relative;
  overflow: hidden;
}
.grammar-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 3px; height: 100%;
  background: linear-gradient(180deg, var(--accent), var(--accent2));
}
.grammar-card.cognate { border-color: var(--accent2); }
.grammar-card.cognate::before { background: linear-gradient(180deg, var(--accent2), var(--it)); }
.grammar-cognate-label { font-size: .75rem; font-family: var(--font-mono); color: var(--accent2); margin-bottom: .75rem; }
.grammar-explanation { font-size: .88rem; color: var(--text2); line-height: 1.65; margin-bottom: 1rem; }
.grammar-pattern {
  background: var(--bg);
  border-radius: .5rem;
  padding: .75rem 1rem;
  font-family: var(--font-mono);
  font-size: .85rem;
  color: var(--accent);
  margin-bottom: 1rem;
}
.grammar-examples { display: flex; flex-direction: column; gap: .5rem; }
.grammar-ex {
  font-family: var(--font-serif);
  font-size: .9rem;
  color: var(--text);
  padding: .4rem 0;
  border-bottom: 1px solid var(--border);
  display: flex;
  gap: .75rem;
  align-items: flex-start;
}
.grammar-ex:last-child { border-bottom: none; }
.ex-num { font-family: var(--font-mono); font-size: .7rem; color: var(--text3); padding-top: .15rem; flex-shrink: 0; }

/* ── Output exercises ── */
.exercise-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 1rem;
  padding: 1.5rem;
  margin-bottom: 1rem;
  animation: fadeUp .4s ease both;
}
.exercise-type-label {
  font-size: .65rem;
  letter-spacing: .15em;
  text-transform: uppercase;
  color: var(--text3);
  font-weight: 600;
  font-family: var(--font-mono);
  margin-bottom: .75rem;
}
.exercise-prompt { font-size: .95rem; margin-bottom: 1rem; line-height: 1.55; }
.exercise-blank {
  display: inline-block;
  min-width: 60px;
  border-bottom: 2px solid var(--accent3);
  color: var(--accent3);
  font-family: var(--font-mono);
  padding: 0 .3rem;
  font-weight: 600;
}
.text-input {
  width: 100%;
  background: var(--bg);
  border: 2px solid var(--border);
  border-radius: .6rem;
  padding: .75rem 1rem;
  color: var(--text);
  font-family: var(--font-serif);
  font-size: .95rem;
  outline: none;
  transition: border-color .2s;
  margin-bottom: 1rem;
}
.text-input:focus { border-color: var(--accent3); }
.text-input.correct   { border-color: var(--accent);  background: rgba(184,224,74,.05); }
.text-input.incorrect { border-color: var(--accent3); background: rgba(224,74,122,.05); }

.word-chips { display: flex; flex-wrap: wrap; gap: .5rem; margin-bottom: 1rem; }
.word-chip {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: .4rem;
  padding: .4rem .75rem;
  font-family: var(--font-serif);
  font-size: .9rem;
  cursor: pointer;
  transition: all .15s;
  user-select: none;
}
.word-chip:hover { background: var(--bg); border-color: var(--accent3); }
.word-chip.used   { opacity: .3; pointer-events: none; }

.answer-zone {
  min-height: 44px;
  background: var(--bg);
  border: 2px dashed var(--border);
  border-radius: .5rem;
  padding: .5rem 1rem;
  font-family: var(--font-serif);
  font-size: .95rem;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: .5rem;
  flex-wrap: wrap;
  color: var(--text2);
}
.answer-chip {
  background: rgba(224,74,122,.1);
  border: 1px solid rgba(224,74,122,.4);
  border-radius: .3rem;
  padding: .25rem .6rem;
  font-family: var(--font-serif);
  cursor: pointer;
  transition: all .15s;
}
.answer-chip:hover { background: rgba(224,74,122,.25); }

.check-btn {
  background: var(--surface2);
  border: 2px solid var(--accent3);
  color: var(--accent3);
  border-radius: .6rem;
  padding: .6rem 1.5rem;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: .85rem;
  cursor: pointer;
  transition: all .2s;
  margin-right: .5rem;
}
.check-btn:hover { background: rgba(224,74,122,.12); }
.check-btn:disabled { opacity: .4; pointer-events: none; }
.check-btn.reset-btn { border-color: var(--text3); color: var(--text3); }
.check-btn.reset-btn:hover { background: rgba(255,255,255,.05); }

.feedback-box {
  border-radius: .6rem;
  padding: .75rem 1rem;
  font-size: .82rem;
  margin-top: .75rem;
  font-family: var(--font-mono);
  display: none;
}
.feedback-box.show { display: block; }
.feedback-box.correct   { background: rgba(184,224,74,.1);  border: 1px solid rgba(184,224,74,.3);  color: var(--accent); }
.feedback-box.incorrect { background: rgba(224,74,122,.1);  border: 1px solid rgba(224,74,122,.3);  color: var(--accent3); }

/* ── False friend ── */
.falso-card {
  background: linear-gradient(135deg, rgba(224,74,74,.08), rgba(224,74,122,.04));
  border: 1px solid rgba(224,74,74,.3);
  border-radius: 1rem;
  padding: 1.75rem;
  text-align: center;
  animation: fadeUp .4s .1s ease both;
}
.falso-emoji { font-size: 2.5rem; margin-bottom: 1rem; }
.falso-pair {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
}
.falso-word { text-align: center; }
.falso-lang { font-size: .65rem; letter-spacing: .15em; text-transform: uppercase; color: var(--text3); font-family: var(--font-mono); }
.falso-term { font-family: var(--font-serif); font-size: 1.8rem; font-weight: 700; }
.falso-meaning { font-size: .75rem; color: var(--text3); font-family: var(--font-mono); }
.falso-arrow { font-size: 1.5rem; color: var(--accent3); }
.falso-explanation { font-size: .88rem; color: var(--text2); line-height: 1.65; margin-bottom: 1.25rem; }
.falso-examples { display: flex; flex-direction: column; gap: .5rem; }
.falso-ex {
  background: var(--surface);
  border-radius: .5rem;
  padding: .65rem .9rem;
  font-family: var(--font-serif);
  font-size: .85rem;
  text-align: left;
  display: flex;
  gap: .6rem;
  align-items: flex-start;
}
.falso-ex-icon { flex-shrink: 0; }

/* ── Bottom nav ── */
.block-nav {
  display: flex;
  gap: .5rem;
  padding: .9rem 1.5rem;
  border-top: 1px solid var(--border);
  justify-content: space-between;
  background: var(--surface);
  position: sticky;
  bottom: 0;
  z-index: 100;
}
.nav-btn {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: .6rem;
  padding: .6rem 1.25rem;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: .85rem;
  cursor: pointer;
  color: var(--text);
  transition: all .2s;
  display: flex;
  align-items: center;
  gap: .4rem;
}
.nav-btn:hover { border-color: var(--text3); background: var(--bg); }
.nav-btn.primary { background: var(--accent); border-color: var(--accent); color: var(--bg); }
.nav-btn.primary:hover { background: #cff060; }
.nav-btn:disabled { opacity: .3; pointer-events: none; }
.block-indicator { font-size: .75rem; color: var(--text3); font-family: var(--font-mono); align-self: center; }

/* ── Loading screen ── */
.loading-screen {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  padding: 2rem;
}
.loading-ring {
  width: 72px; height: 72px;
  border-radius: 50%;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  animation: spin 1s linear infinite;
}
.loading-title { font-size: 1.1rem; font-weight: 600; text-align: center; margin-bottom: .5rem; }
.loading-sub   { font-size: .8rem; color: var(--text3); font-family: var(--font-mono); text-align: center; }
.loading-steps { display: flex; flex-direction: column; gap: .5rem; margin-top: .5rem; }
.load-step {
  display: flex;
  align-items: center;
  gap: .75rem;
  font-size: .8rem;
  color: var(--text3);
  font-family: var(--font-mono);
  opacity: 0;
  animation: fadeIn .3s ease both;
}
.load-step.done  { color: var(--accent); }
.load-step.error { color: var(--accent3); }
.load-dot { width: 6px; height: 6px; border-radius: 50%; background: currentColor; flex-shrink: 0; }

/* ── Finish screen ── */
.finish-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}
.results-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 1.5rem;
  padding: 2.5rem;
  max-width: 520px;
  width: 100%;
  animation: fadeUp .5s ease both;
}
.results-header { text-align: center; margin-bottom: 2rem; }
.results-score-ring {
  width: 120px; height: 120px;
  border-radius: 50%;
  border: 4px solid var(--border);
  margin: 0 auto 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
}
.results-score-num   { font-family: var(--font-serif); font-size: 2.2rem; font-weight: 700; color: var(--accent); }
.results-score-label { font-size: .7rem; color: var(--text3); display: block; }
.results-title { font-size: 1.3rem; font-weight: 800; margin-bottom: .5rem; }
.results-nota  { font-size: .88rem; color: var(--text2); font-family: var(--font-serif); font-style: italic; line-height: 1.6; }

.results-stats {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: .75rem;
  margin-bottom: 1.75rem;
}
.stat-item {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: .85rem;
  text-align: center;
}
.stat-num   { font-size: 1.4rem; font-weight: 800; font-family: var(--font-serif); }
.stat-label { font-size: .65rem; color: var(--text3); text-transform: uppercase; letter-spacing: .1em; font-family: var(--font-mono); }

.results-analysis { margin-bottom: 1.75rem; }
.analysis-row {
  display: flex;
  align-items: flex-start;
  gap: .75rem;
  padding: .75rem 0;
  border-bottom: 1px solid var(--border);
  font-size: .83rem;
}
.analysis-row:last-child { border-bottom: none; }
.analysis-icon  { font-size: 1rem; flex-shrink: 0; padding-top: .05rem; }
.analysis-label { font-weight: 600; margin-bottom: .15rem; }
.analysis-value { color: var(--text3); font-family: var(--font-mono); font-size: .78rem; }

.level-change {
  background: var(--surface2);
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  padding: 1rem;
  text-align: center;
  margin-bottom: 1.75rem;
}
.level-change-label { font-size: .7rem; color: var(--text3); text-transform: uppercase; letter-spacing: .15em; font-family: var(--font-mono); margin-bottom: .4rem; }
.level-change-value { font-size: 1rem; font-weight: 700; color: var(--accent); }

.results-actions { display: flex; gap: .75rem; }
.results-actions .nav-btn { flex: 1; justify-content: center; }

/* ── Error screen ── */
.error-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 1.25rem;
  padding: 2rem;
  text-align: center;
}
.error-icon  { font-size: 3rem; }
.error-msg   { font-size: .95rem; color: var(--accent3); max-width: 400px; }
.error-back  { font-family: var(--font-mono); font-size: .8rem; color: var(--accent); letter-spacing: .1em; text-transform: uppercase; }

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

/* ── Responsive ── */
@media (max-width: 480px) {
  .config-card, .results-card, .login-card { padding: 1.75rem; }
  .srs-feedback-grid { grid-template-columns: 1fr 1fr 1fr; gap: .5rem; }
  .srs-btn { padding: .6rem .3rem; font-size: .75rem; }
  .results-stats { grid-template-columns: 1fr 1fr 1fr; }
  .stat-num { font-size: 1.1rem; }
  .card-word { font-size: 2rem; }
}