/* Español · Lección 1 — mobile-first, no external assets */

:root{
  --bg:#faf7ff;
  --surface:#ffffff;
  --ink:#1f1235;
  --ink-soft:#6b5b8a;
  --line:#e8e0f5;
  --brand:#7c3aed;
  --brand-dk:#5b21b6;
  --brand-soft:#f3ecff;
  --ok:#0f9d58;
  --ok-soft:#e6f6ec;
  --bad:#e02f4f;
  --bad-soft:#fdeaee;
  --warn:#f59e0b;
  --radius:18px;
  --shadow:0 2px 10px rgba(31,18,53,.07);
}

@media (prefers-color-scheme: dark){
  :root{
    --bg:#15101f;
    --surface:#1f1830;
    --ink:#f4f0fb;
    --ink-soft:#a99bc4;
    --line:#332a48;
    --brand:#a78bfa;
    --brand-dk:#c4b5fd;
    --brand-soft:#2a2140;
    --ok:#34d17d;
    --ok-soft:#16341f;
    --bad:#ff7a90;
    --bad-soft:#3a1620;
    --shadow:0 2px 12px rgba(0,0,0,.35);
  }
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  background:var(--bg);
  color:var(--ink);
  font:16px/1.5 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  -webkit-text-size-adjust:100%;
  overscroll-behavior-y:contain;               /* no rubber-band bounce mid-quiz */
  padding:env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
}
.screen{max-width:640px;margin:0 auto;padding:16px 16px 48px}
[hidden]{display:none !important}
h1,h2{margin:0;line-height:1.2}
button{
  font:inherit;cursor:pointer;
  touch-action:manipulation;                   /* kills the 300ms double-tap zoom delay */
  -webkit-tap-highlight-color:transparent;
}
/* every tappable thing clears the 44px touch target minimum */
.deck,.chip,.seg-btn,.btn,.choice,.icon-btn,.speak-btn{min-height:44px}

/* ---------- hero ---------- */
.hero{text-align:center;padding:22px 8px 10px}
.hero-badge{
  display:inline-block;background:var(--brand-soft);color:var(--brand-dk);
  font-weight:700;font-size:12px;letter-spacing:.12em;text-transform:uppercase;
  padding:6px 14px;border-radius:999px;margin-bottom:12px;
}
.hero h1{font-size:30px;letter-spacing:-.02em}
.hero-sub{color:var(--ink-soft);margin:8px 0 0}

/* ---------- panels ---------- */
.panel{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:16px;margin:16px 0;box-shadow:var(--shadow);
}
.panel-title{
  font-size:12px;letter-spacing:.1em;text-transform:uppercase;
  color:var(--ink-soft);font-weight:700;margin-bottom:12px;
}

/* ---------- deck picker ---------- */
.deck-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:8px}
.deck{
  display:flex;align-items:center;gap:9px;text-align:left;
  background:var(--bg);border:2px solid var(--line);border-radius:14px;
  padding:11px 12px;color:var(--ink);transition:border-color .12s,background .12s;
}
.deck:hover{border-color:var(--brand)}
.deck.is-on{border-color:var(--brand);background:var(--brand-soft)}
.deck-emoji{font-size:22px;line-height:1;flex:none}
/* must be a block flex-child, or min-width:0 does nothing and long names
   ("Expresiones de cortesía") spill past the card instead of ellipsing */
.deck-txt{display:block;min-width:0;flex:1 1 auto;overflow:hidden}
.deck-name{display:block;font-weight:650;font-size:14px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.deck-count{font-size:12px;color:var(--ink-soft)}
.deck-actions{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}

.chip{
  background:var(--bg);border:1px solid var(--line);color:var(--ink-soft);
  border-radius:999px;padding:7px 13px;font-size:13px;font-weight:600;
}
.chip:hover{border-color:var(--brand);color:var(--brand-dk)}
.chip-star{color:#b45309;border-color:#fcd9a0;background:#fff8ec}
@media (prefers-color-scheme: dark){ .chip-star{background:#3a2c10;border-color:#7a5a18;color:#fcd34d} }

/* ---------- segmented ---------- */
.seg{display:flex;gap:6px;background:var(--bg);border:1px solid var(--line);border-radius:14px;padding:5px}
.seg-btn{
  flex:1;border:0;background:transparent;color:var(--ink-soft);
  border-radius:10px;padding:10px 6px;font-size:13px;font-weight:650;
}
.seg-btn.is-on{background:var(--brand);color:#fff;box-shadow:var(--shadow)}

/* ---------- buttons ---------- */
.cta-row{display:flex;gap:10px;margin-top:18px;flex-wrap:wrap}
.btn{flex:1;min-width:130px;border:0;border-radius:14px;padding:16px 18px;font-size:16px;font-weight:700}
.btn-primary{background:var(--brand);color:#fff;box-shadow:var(--shadow)}
.btn-primary:hover{background:var(--brand-dk)}
.btn-ghost{background:var(--surface);color:var(--ink);border:1px solid var(--line)}
.btn-warn{background:var(--warn);color:#3a2600}
.pool-note{text-align:center;color:var(--ink-soft);font-size:13px;margin:12px 0 0}

/* ---------- stats ---------- */
/* ---------- who are you ---------- */
.name-label{display:block;font-size:12px;letter-spacing:.1em;text-transform:uppercase;
  color:var(--ink-soft);font-weight:700;margin-bottom:8px}
.name-input{
  width:100%;font-size:18px;                 /* >=16px or iOS zooms the page on focus */
  padding:15px 16px;border-radius:14px;
  border:2px solid var(--line);background:var(--bg);color:var(--ink);
  -webkit-appearance:none;appearance:none;
}
.name-input:focus{outline:none;border-color:var(--brand)}
.name-err{color:var(--bad);font-size:13px;font-weight:650;margin:10px 0 0}
.name-go{width:100%;margin-top:14px}

.panel-head{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:12px}
.panel-head .panel-title{margin-bottom:0}

.known-list{display:grid;gap:8px}
.known-row{display:flex;align-items:stretch;gap:8px}
.known{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  flex:1 1 auto;min-width:0;
  background:var(--bg);border:2px solid var(--line);border-radius:14px;
  padding:13px 15px;color:var(--ink);text-align:left;
}
.known-del{
  flex:none;width:46px;border-radius:14px;font-size:16px;font-weight:800;
  background:var(--bad-soft);color:var(--bad);border:2px solid transparent;
}
.known-del:hover{border-color:var(--bad)}
.known:hover{border-color:var(--brand);background:var(--brand-soft)}
.known-name{font-weight:700;font-size:16px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.known-meta{font-size:12px;color:var(--ink-soft);flex:none}

.whobar{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:4px 0 0}
.whobar-name{font-size:14px;color:var(--ink-soft)}
.whobar-name b{color:var(--ink)}

.mastery{margin:14px 0}
.mastery-head{display:flex;justify-content:space-between;align-items:baseline;font-size:12px;
  font-weight:700;color:var(--ink-soft);text-transform:uppercase;letter-spacing:.05em;margin-bottom:6px}
.mastery-bar{height:10px;background:var(--line);border-radius:999px;overflow:hidden}
.mastery-fill{height:100%;width:0;border-radius:999px;background:linear-gradient(90deg,var(--brand),var(--ok));transition:width .4s ease}
.mastery-note{font-size:12px;color:var(--ink-soft);margin:8px 0 0;line-height:1.45}

.no-hint{font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--ok);
  font-weight:700;margin-bottom:10px}
.level-note{font-size:14px;font-weight:650;color:var(--brand-dk);margin:-4px 0 12px}

.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:12px}
.stat{background:var(--bg);border-radius:12px;padding:12px;text-align:center}
.stat-n{font-size:22px;font-weight:800;color:var(--brand-dk)}
.stat-l{font-size:11px;color:var(--ink-soft);text-transform:uppercase;letter-spacing:.06em}

.foot{text-align:center;color:var(--ink-soft);font-size:12px;margin-top:26px}

/* ---------- quiz ---------- */
.topbar{display:flex;align-items:center;gap:12px;padding:8px 0 4px}
.icon-btn{
  border:1px solid var(--line);background:var(--surface);color:var(--ink);
  width:40px;height:40px;border-radius:12px;font-size:19px;flex:none;
}
.progress{flex:1;height:9px;background:var(--line);border-radius:999px;overflow:hidden}
.progress-fill{height:100%;width:0;background:var(--brand);border-radius:999px;transition:width .28s ease}
.score-pill{
  background:var(--brand-soft);color:var(--brand-dk);font-weight:750;font-size:14px;
  padding:7px 12px;border-radius:999px;flex:none;
}
.streak-line{text-align:center;height:20px;font-size:13px;font-weight:700;color:var(--warn)}

.card{
  background:var(--surface);border:1px solid var(--line);border-radius:22px;
  padding:26px 20px;text-align:center;box-shadow:var(--shadow);margin:6px 0 16px;
}
.prompt-icon{font-size:56px;line-height:1;margin-bottom:10px}
/* flag questions: the icon IS the question, so give it room */
.prompt-icon-xl{font-size:92px}
.prompt-lang{
  font-size:11px;letter-spacing:.12em;text-transform:uppercase;
  color:var(--ink-soft);font-weight:700;margin-bottom:8px;
}
.prompt{font-size:26px;letter-spacing:-.01em}
.speak-btn{
  margin-top:14px;background:var(--brand-soft);color:var(--brand-dk);
  border:0;border-radius:999px;padding:9px 18px;font-size:14px;font-weight:650;
}

.choices{display:grid;gap:10px}
.choice{
  display:flex;align-items:center;gap:12px;width:100%;text-align:left;
  background:var(--surface);border:2px solid var(--line);color:var(--ink);
  border-radius:16px;padding:15px 16px;font-size:16px;font-weight:600;
  transition:border-color .12s,background .12s;
}
.choice:hover:not(:disabled){border-color:var(--brand)}
.choice:disabled{cursor:default}
.choice-emoji{font-size:24px;flex:none}
.choice.correct{border-color:var(--ok);background:var(--ok-soft)}
.choice.wrong{border-color:var(--bad);background:var(--bad-soft)}
.choice-mark{margin-left:auto;font-size:19px;font-weight:800}

.feedback{margin-top:16px;text-align:center}
.feedback-text{font-size:16px;font-weight:700;margin-bottom:12px}
.feedback-text.ok{color:var(--ok)}
.feedback-text.bad{color:var(--bad)}
.feedback .btn{width:100%}

/* ---------- results ---------- */
.result-hero{text-align:center;padding:34px 10px 8px}
.result-emoji{font-size:64px}
.result-hero h1{font-size:42px;margin:10px 0 6px}
.result-hero p{color:var(--ink-soft);margin:0}
.missed-list{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.missed-list li{
  display:flex;align-items:center;gap:11px;background:var(--bg);
  border-radius:12px;padding:11px 13px;font-size:15px;
}
.missed-es{font-weight:750}
.missed-arrow{color:var(--ink-soft)}

/* ---------- flashcards ---------- */
.flashcard{perspective:1200px;margin:16px 0}
.flash-inner{
  position:relative;width:100%;min-height:270px;
  transform-style:preserve-3d;transition:transform .5s cubic-bezier(.4,.2,.2,1);cursor:pointer;
}
.flash-inner.flipped{transform:rotateY(180deg)}
.flash-face{
  position:absolute;inset:0;backface-visibility:hidden;-webkit-backface-visibility:hidden;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;
  background:var(--surface);border:1px solid var(--line);border-radius:22px;
  padding:24px;text-align:center;box-shadow:var(--shadow);
}
.flash-face h2{font-size:26px}
.flash-back{transform:rotateY(180deg);background:var(--brand-soft)}
.flip-hint{position:absolute;bottom:14px;font-size:11px;color:var(--ink-soft);text-transform:uppercase;letter-spacing:.1em}

@media (prefers-reduced-motion: reduce){
  .flash-inner,.progress-fill{transition:none}
}

/* ---------- small phones (iPhone SE / mini) ---------- */
@media (max-width:400px){
  .screen{padding:12px 12px 40px}
  .hero h1{font-size:26px}
  .prompt{font-size:22px}
  .prompt-icon{font-size:46px}
  .card{padding:20px 16px}
  .choice{padding:14px;font-size:15px}
  .deck-grid{grid-template-columns:repeat(auto-fill,minmax(132px,1fr))}
  .result-hero h1{font-size:36px}
  .btn{min-width:110px;padding:15px 14px}
}

/* ---------- landscape phone: keep the choices reachable ---------- */
@media (max-height:520px) and (orientation:landscape){
  .hero{padding:10px 8px 4px}
  .prompt-icon{font-size:34px;margin-bottom:4px}
  .card{padding:14px 16px;margin:4px 0 10px}
  .prompt{font-size:20px}
  .choices{grid-template-columns:1fr 1fr}
  .flash-inner{min-height:180px}
}