/* ═══════════════════════════════════════
   LINGVA v2 — Styles
   Dark, warm, playful
═══════════════════════════════════════ */

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

:root {
  --bg:       #13111c;
  --s1:       #1e1b2e;
  --s2:       #272440;
  --border:   #312e4e;
  --text:     #f0eeff;
  --dim:      #8b87b0;
  --accent:   #ff6b35;
  --gold:     #ffd166;
  --green:    #06d6a0;
  --red:      #ef476f;
  --blue:     #4cc9f0;
  --r:        14px;
  --rs:       10px;
}

html, body { height: 100%; background: var(--bg); color: var(--text);
  font-family: 'Nunito', sans-serif; overflow: hidden; }

/* ── SCREENS ── */
.screen { position: fixed; inset: 0; display: none; overflow-y: auto; }
.screen.active { display: block; animation: fadeUp .22s ease; }
@keyframes fadeUp {
  from { opacity:0; transform:translateY(10px); }
  to   { opacity:1; transform:translateY(0); }
}

/* ── TOP BAR ── */
.top-bar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 18px;
  background: var(--s1);
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 20;
}
.logo { font-family: 'Fredoka', sans-serif; font-size: 22px; font-weight: 700;
  color: var(--gold); display: flex; align-items: center; gap: 6px; }
.logo span { color: var(--text); }
.top-stats { display: flex; gap: 14px; align-items: center; }
.top-stat { font-size: 15px; font-weight: 800; color: var(--gold); }
.xp-stat { color: var(--blue); }
.back-btn { background: var(--s2); border: 1px solid var(--border); border-radius: 50%;
  width: 38px; height: 38px; color: var(--dim); font-size: 17px; cursor: pointer;
  transition: .15s; flex-shrink: 0; }
.back-btn:hover { color: var(--text); background: var(--border); }
.unit-title-bar { font-family: 'Fredoka', sans-serif; font-size: 18px; font-weight: 600;
  display: flex; align-items: center; gap: 6px; }

/* ── DIR TOGGLE ── */
.dir-toggle { display: flex; gap: 10px; padding: 14px 18px 0; }
.dir-btn {
  flex: 1; padding: 10px; border-radius: 100px;
  border: 2px solid var(--border); background: var(--s1);
  color: var(--dim); font-family: 'Nunito', sans-serif; font-size: 14px; font-weight: 800;
  cursor: pointer; transition: .2s;
}
.dir-btn.active { border-color: var(--accent); color: var(--text);
  background: rgba(255,107,53,.1); }

/* ══ COURSE PATH ══ */
.course-path { padding: 20px 18px 80px; display: flex; flex-direction: column; gap: 16px; }

.unit-card {
  border-radius: 20px;
  border: 1px solid var(--border);
  overflow: hidden;
  transition: transform .2s;
}
.unit-card:hover { transform: translateY(-2px); }

.unit-header {
  padding: 18px 20px;
  display: flex; align-items: center; gap: 14px;
  cursor: pointer;
}
.unit-icon-badge {
  width: 52px; height: 52px; border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  font-size: 26px; flex-shrink: 0;
}
.unit-meta { flex: 1; }
.unit-label { font-size: 11px; font-weight: 800; text-transform: uppercase;
  letter-spacing: 1px; opacity: .6; margin-bottom: 2px; }
.unit-name { font-family: 'Fredoka', sans-serif; font-size: 20px; font-weight: 600; }
.unit-subtitle { font-size: 13px; color: var(--dim); font-weight: 600; margin-top: 1px; }
.unit-chevron { font-size: 20px; color: var(--dim); transition: transform .2s; }
.unit-card.open .unit-chevron { transform: rotate(90deg); }

.unit-progress-bar { height: 4px; background: var(--s2); margin: 0 20px 14px; border-radius: 2px; }
.unit-progress-fill { height: 100%; border-radius: 2px; transition: width .4s; }

.unit-lessons-preview {
  display: none; padding: 0 16px 16px;
  gap: 8px; flex-direction: column;
}
.unit-card.open .unit-lessons-preview { display: flex; }

.mini-lesson {
  display: flex; align-items: center; gap: 12px;
  padding: 10px 14px; border-radius: var(--rs);
  background: var(--s2); border: 1px solid var(--border);
  cursor: pointer; transition: .15s;
}
.mini-lesson:hover { border-color: var(--dim); }
.mini-lesson.done { opacity: .55; }
.mini-lesson.locked { opacity: .35; cursor: default; }
.mini-icon { font-size: 20px; }
.mini-meta { flex: 1; }
.mini-title { font-size: 14px; font-weight: 800; }
.mini-type { font-size: 11px; color: var(--dim); font-weight: 700; text-transform: uppercase;
  letter-spacing: .5px; margin-top: 1px; }
.mini-check { font-size: 18px; }

/* ══ LESSON PATH (sub-lessons) ══ */
.lesson-path { padding: 20px 18px 80px; display: flex; flex-direction: column; gap: 12px; }

.lesson-card {
  background: var(--s1); border: 1px solid var(--border); border-radius: 18px;
  padding: 18px 20px; cursor: pointer; transition: .18s;
  display: flex; align-items: center; gap: 16px;
}
.lesson-card:hover { border-color: var(--dim); transform: translateY(-2px); }
.lesson-card.locked { opacity: .35; cursor: default; pointer-events: none; }
.lesson-card.done { border-color: var(--green); background: rgba(6,214,160,.06); }

.lc-icon { font-size: 36px; }
.lc-body { flex: 1; }
.lc-title { font-family: 'Fredoka', sans-serif; font-size: 19px; font-weight: 600; }
.lc-desc  { font-size: 13px; color: var(--dim); font-weight: 600; margin-top: 2px; }
.lc-pills { display: flex; gap: 6px; margin-top: 8px; flex-wrap: wrap; }
.lc-pill  { background: var(--s2); border: 1px solid var(--border); border-radius: 100px;
  padding: 3px 10px; font-size: 11px; font-weight: 800; color: var(--dim); }
.lc-pill.story { border-color: var(--gold); color: var(--gold); }
.lc-pill.match  { border-color: var(--blue); color: var(--blue); }
.lc-pill.review { border-color: var(--green); color: var(--green); }
.lc-status { font-size: 22px; }

/* ══ SUB-LESSON CHOOSER ══ */
.sublesson-body { padding: 20px 18px 80px; }
.sl-lesson-card {
  background: var(--s1); border: 1px solid var(--border); border-radius: 20px;
  padding: 20px; margin-bottom: 16px;
}
.sl-header { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.sl-big-icon { font-size: 40px; }
.sl-title { font-family: 'Fredoka', sans-serif; font-size: 22px; font-weight: 700; }
.sl-desc  { font-size: 13px; color: var(--dim); font-weight: 600; margin-top: 2px; }
.sl-grid  { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.sl-step  {
  background: var(--s2); border: 2px solid var(--border); border-radius: var(--r);
  padding: 16px 12px; text-align: center; cursor: pointer; transition: .18s;
}
.sl-step:hover:not(.sl-locked) { transform: translateY(-3px); }
.sl-step.sl-done  { border-color: var(--green); }
.sl-step.sl-locked { opacity: .35; cursor: default; }
.sl-step.sl-active { border-color: var(--accent); box-shadow: 0 0 16px rgba(255,107,53,.25); }
.sl-num   { font-size: 28px; font-weight: 900; font-family: 'Fredoka', sans-serif; }
.sl-label { font-size: 12px; font-weight: 800; color: var(--dim); text-transform: uppercase;
  letter-spacing: .5px; margin-top: 2px; }
.sl-check { font-size: 24px; margin-top: 4px; }

.sl-story-btn {
  width: 100%; padding: 18px; border-radius: var(--r);
  background: linear-gradient(135deg, rgba(255,209,102,.12), rgba(255,107,53,.08));
  border: 2px solid var(--gold); color: var(--gold);
  font-family: 'Fredoka', sans-serif; font-size: 18px; font-weight: 600;
  cursor: pointer; transition: .2s; display: flex; align-items: center;
  justify-content: center; gap: 10px;
}
.sl-story-btn:hover { background: rgba(255,209,102,.18); }

/* ══ EXERCISE ══ */
.ex-header {
  display: flex; align-items: center; gap: 12px; padding: 14px 18px;
  background: var(--bg); border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 10;
}
.ex-progress-wrap { flex: 1; }
.ex-progress-bg  { height: 12px; background: var(--s2); border-radius: 100px; overflow: hidden; }
.ex-progress-fill{ height: 100%; border-radius: 100px;
  background: linear-gradient(90deg, var(--green), #00f5c4);
  transition: width .45s ease;
  box-shadow: 0 0 10px rgba(6,214,160,.5); }
.ex-lives { font-size: 19px; flex-shrink: 0; }
.ex-sub-label { padding: 6px 18px; font-size: 11px; font-weight: 800; color: var(--dim);
  text-transform: uppercase; letter-spacing: 1px; }

.ex-body { max-width: 520px; margin: 0 auto; padding: 24px 18px 80px; }

/* Question elements */
.q-chip { display: inline-block; background: var(--s2); border: 1px solid var(--border);
  border-radius: 100px; padding: 4px 14px; font-size: 11px; font-weight: 800;
  color: var(--dim); text-transform: uppercase; letter-spacing: 1px; margin-bottom: 18px; }
.q-prompt { font-size: 18px; font-weight: 800; margin-bottom: 6px; }
.q-word   { font-family: 'Fredoka', sans-serif; font-size: 38px; font-weight: 700;
  color: var(--gold); display: block; margin-bottom: 28px; line-height: 1.2; }
.q-flag   { font-size: 28px; margin-bottom: 6px; display: block; }

/* Multiple choice */
.mc-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.mc-btn {
  background: var(--s1); border: 2px solid var(--border); border-radius: var(--r);
  padding: 16px 12px; color: var(--text); font-family: 'Nunito', sans-serif;
  font-size: 15px; font-weight: 800; cursor: pointer; transition: .16s; text-align: center;
}
.mc-btn:hover:not(:disabled) { border-color: var(--blue); background: rgba(76,201,240,.08); transform: translateY(-2px); }
.mc-btn.correct  { border-color: var(--green) !important; background: rgba(6,214,160,.12) !important; color: var(--green); }
.mc-btn.wrong    { border-color: var(--red)   !important; background: rgba(239,71,111,.12) !important; color: var(--red); }
.mc-btn:disabled { cursor: default; transform: none !important; }

/* Type input */
.type-input {
  width: 100%; background: var(--s1); border: 2px solid var(--border);
  border-radius: var(--r); padding: 16px 18px; color: var(--text);
  font-family: 'Nunito', sans-serif; font-size: 20px; font-weight: 800; outline: none;
  transition: border-color .2s; margin-top: 12px;
}
.type-input:focus  { border-color: var(--blue); }
.type-input.correct { border-color: var(--green); }
.type-input.wrong   { border-color: var(--red); }

.btn-check {
  width: 100%; margin-top: 14px; padding: 15px; border-radius: 100px;
  background: var(--blue); border: none; color: var(--bg);
  font-family: 'Nunito', sans-serif; font-size: 16px; font-weight: 900; cursor: pointer;
  transition: .2s;
}
.btn-check:hover { filter: brightness(1.1); transform: translateY(-2px); }

/* Match pairs */
.match-wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 10px; }
.match-col  { display: flex; flex-direction: column; gap: 8px; }
.match-btn  {
  background: var(--s1); border: 2px solid var(--border); border-radius: var(--rs);
  padding: 12px 10px; color: var(--text); font-family: 'Nunito', sans-serif;
  font-size: 14px; font-weight: 800; cursor: pointer; transition: .16s; text-align: center;
}
.match-btn:hover:not(.matched):not(.selected) { border-color: #7b5ea7; background: rgba(123,94,167,.1); }
.match-btn.selected { border-color: var(--gold); background: rgba(255,209,102,.08); }
.match-btn.matched  { border-color: var(--green); background: rgba(6,214,160,.1); color: var(--green); }
.match-btn.bad      { border-color: var(--red); animation: shake .35s; }
@keyframes shake {
  0%,100%{transform:translateX(0)} 25%{transform:translateX(-6px)} 75%{transform:translateX(6px)}
}

/* ══ STORY ══ */
.story-label { font-family: 'Fredoka', sans-serif; font-size: 18px; font-weight: 600; color: var(--gold); }
.story-body { max-width: 520px; margin: 0 auto; padding: 24px 18px 80px; }
.story-title { font-family: 'Fredoka', sans-serif; font-size: 26px; font-weight: 700; margin-bottom: 6px; }
.story-flag  { font-size: 40px; margin-bottom: 14px; display: block; }
.story-lines { display: flex; flex-direction: column; gap: 10px; margin-bottom: 30px; }
.story-line  {
  background: var(--s1); border: 1px solid var(--border); border-radius: var(--r);
  padding: 14px 16px;
}
.sl-et { font-size: 16px; font-weight: 800; color: var(--text); margin-bottom: 4px; }
.sl-es { font-size: 14px; color: var(--dim); font-weight: 700; }
.story-qs-title { font-size: 16px; font-weight: 900; text-transform: uppercase;
  letter-spacing: 1px; color: var(--dim); margin-bottom: 14px; }
.story-qs { display: flex; flex-direction: column; gap: 22px; }
.sq-q    { font-size: 16px; font-weight: 800; margin-bottom: 10px; }
.sq-opts { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.sq-btn  {
  background: var(--s1); border: 2px solid var(--border); border-radius: var(--rs);
  padding: 12px 10px; color: var(--text); font-family: 'Nunito', sans-serif;
  font-size: 14px; font-weight: 800; cursor: pointer; transition: .16s; text-align: center;
}
.sq-btn:hover:not(:disabled) { border-color: var(--blue); }
.sq-btn.correct { border-color: var(--green) !important; color: var(--green); }
.sq-btn.wrong   { border-color: var(--red)   !important; color: var(--red); }
.sq-btn:disabled { cursor: default; }

.story-continue {
  width: 100%; margin-top: 28px; padding: 16px; border-radius: 100px;
  background: linear-gradient(135deg, var(--accent), #ff8c5a);
  border: none; color: white; font-family: 'Nunito', sans-serif;
  font-size: 17px; font-weight: 900; cursor: pointer; transition: .2s;
  display: none;
}
.story-continue.visible { display: block; }
.story-continue:hover { transform: translateY(-3px); box-shadow: 0 8px 24px rgba(255,107,53,.4); }

/* ══ FEEDBACK ══ */
.feedback {
  position: fixed; bottom: 0; left: 0; right: 0; z-index: 100;
  max-width: 520px; margin: 0 auto;
  border-radius: 22px 22px 0 0; padding: 22px 20px 30px;
  transition: opacity .2s; animation: slideUp .22s ease;
}
.feedback.hidden { display: none; }
@keyframes slideUp { from{transform:translateY(100%)} to{transform:translateY(0)} }
.feedback.ok   { background: rgba(6,214,160,.13);  border-top: 3px solid var(--green); }
.feedback.fail { background: rgba(239,71,111,.13); border-top: 3px solid var(--red); }

.fb-inner { display: flex; align-items: flex-start; gap: 12px; flex-wrap: wrap; }
.fb-icon  { font-size: 30px; }
.fb-msg   { font-size: 18px; font-weight: 900; }
.feedback.ok   .fb-msg { color: var(--green); }
.feedback.fail .fb-msg { color: var(--red); }
.fb-hint  { font-size: 13px; color: var(--dim); font-weight: 700; margin-top: 3px; }
.fb-continue {
  margin-left: auto; align-self: center;
  padding: 12px 24px; border-radius: 100px; border: none;
  font-family: 'Nunito', sans-serif; font-size: 15px; font-weight: 900; cursor: pointer;
}
.feedback.ok   .fb-continue { background: var(--green); color: var(--bg); }
.feedback.fail .fb-continue { background: var(--red);   color: white; }

/* ══ RESULT ══ */
.result-wrap {
  max-width: 420px; margin: 0 auto;
  padding: 50px 22px 60px;
  display: flex; flex-direction: column; align-items: center; gap: 20px;
  text-align: center; min-height: 100vh;
}
.result-trophy { font-size: 80px; animation: popIn .5s cubic-bezier(.17,.67,.42,1.4); }
@keyframes popIn { from{transform:scale(0);opacity:0} to{transform:scale(1);opacity:1} }
.result-title  { font-family: 'Fredoka', sans-serif; font-size: 34px; font-weight: 700; }
.result-sub    { color: var(--dim); font-size: 15px; font-weight: 700; }
.result-grid   { display: flex; gap: 12px; width: 100%; }
.result-card   {
  flex: 1; background: var(--s1); border: 1px solid var(--border); border-radius: var(--r);
  padding: 18px 6px; display: flex; flex-direction: column; align-items: center; gap: 4px;
}
.rc-val { font-family: 'Fredoka', sans-serif; font-size: 28px; font-weight: 700; color: var(--gold); }
.rc-lbl { font-size: 11px; font-weight: 800; color: var(--dim); text-transform: uppercase; }

.btn-primary {
  width: 100%; padding: 17px; border-radius: 100px;
  background: linear-gradient(135deg, var(--accent), #ff8c5a);
  border: none; color: white; font-family: 'Nunito', sans-serif;
  font-size: 17px; font-weight: 900; cursor: pointer; transition: .2s;
  box-shadow: 0 6px 24px rgba(255,107,53,.35);
}
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 10px 32px rgba(255,107,53,.5); }

/* ══ CONFETTI ══ */
#confetti-layer { position: fixed; inset: 0; pointer-events: none; z-index: 200; overflow: hidden; }
.cp { position: absolute; top: -16px; width: 9px; height: 9px; border-radius: 2px;
  animation: cf linear forwards; }
@keyframes cf { to { transform: translateY(110vh) rotate(720deg); opacity: 0; } }

/* Scrollbar */
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }