/* ═══════════════════════════════════════════════════════════
   Jarvis School – Dark theme (studiografix_tech)
   ═══════════════════════════════════════════════════════════ */

.js-landing, .js-home, .js-game, .js-profile, .js-story-select {
  --js-math:    #b8c3ff;
  --js-czech:   #00dce5;
  --js-correct: #2ed573;
  --js-wrong:   #ff4757;
  --js-surface: #171f33;
  --js-surface2:#222a3d;
  --js-text:    #dae2fd;
  --js-muted:   #8e90a2;
  --js-border:  #434656;
  --js-radius:  14px;
  --js-shadow:  0 4px 24px rgba(0,0,0,.45);
}

/* ── Landing hero ───────────────────────────────────────── */
.js-landing, .js-home {
  max-width: 720px;
  margin: 0 auto;
  padding: 1.5rem 1rem 4rem;
}
.js-hero { text-align: center; padding: 2.5rem 1rem 2rem; }
.js-hero__icon { font-size: 3.5rem; line-height: 1; margin-bottom: .5rem; }
.js-hero__title {
  font-size: 2rem; font-weight: 800;
  color: var(--js-text); margin-bottom: .5rem;
}
.js-hero__sub { color: var(--js-muted); font-size: 1.05rem; line-height: 1.5; }
.js-hero__sub strong { color: var(--js-text); }
.js-hero__cta { display: flex; gap: .75rem; justify-content: center; margin-top: 1.5rem; flex-wrap: wrap; }
.js-hero__note { color: var(--js-muted); font-size: .82rem; margin-top: .75rem; }

/* ── Buttons ────────────────────────────────────────────── */
.js-btn {
  border: none; border-radius: 10px;
  padding: .75rem 1.4rem; font-size: 1rem; font-weight: 700;
  cursor: pointer; text-decoration: none; display: inline-block;
  transition: opacity .15s, transform .1s;
}
.js-btn:active { transform: scale(.97); }
.js-btn--primary { background: var(--js-math); color: #001356; }
.js-btn--primary:hover { opacity: .85; color: #001356; }
.js-btn--ghost {
  background: transparent; color: var(--js-text);
  border: 1px solid var(--js-border);
}
.js-btn--ghost:hover { border-color: var(--js-math); color: var(--js-math); }
.js-btn--next { background: var(--js-correct); color: #003739; width: 100%; margin-top: .5rem; padding: .85rem; font-size: 1.05rem; }
.js-btn--next:hover { opacity: .85; }
.js-btn--small { padding: .3rem .75rem; font-size: .8rem; border-radius: 6px; }

/* ── Home profile card ──────────────────────────────────── */
.js-home-profile-card {
  display: flex; align-items: center; gap: 1rem;
  background: var(--js-surface); border: 1px solid var(--js-border);
  border-radius: var(--js-radius); padding: 1rem 1.25rem;
  margin-bottom: 1.5rem; text-decoration: none; color: inherit;
  transition: border-color .15s, background .15s;
}
.js-home-profile-card:hover { border-color: var(--js-math); background: var(--js-surface2); }
.js-home-profile-card__left { display: flex; align-items: center; gap: .75rem; flex: 1; }
.js-home-profile-card__rank { font-size: 2.2rem; line-height: 1; }
.js-home-profile-card__name { font-size: 1rem; font-weight: 700; color: var(--js-math); }
.js-home-profile-card__xp { font-size: .82rem; color: var(--js-muted); margin-top: .1rem; }
.js-home-profile-card__right { display: flex; flex-direction: column; align-items: flex-end; gap: .4rem; min-width: 140px; }
.js-home-profile-card__btn { font-size: .85rem; color: var(--js-math); white-space: nowrap; }
.js-home-profile-card__next { font-size: .75rem; color: var(--js-muted); white-space: nowrap; }
.js-home-profile-card__bar-wrap { width: 100%; display: flex; flex-direction: column; align-items: flex-end; gap: .2rem; }

/* ── XP bar (landing + profile) ────────────────────────── */
.js-progress-bar-wrap {
  background: var(--js-surface);
  border: 1px solid var(--js-border);
  border-radius: var(--js-radius);
  padding: 1rem 1.25rem;
  margin-bottom: 1.5rem;
}
.js-rank-badge { font-size: .95rem; color: var(--js-text); margin-bottom: .5rem; }
.js-xpbar, .js-xpbar-wrap .js-xpbar {
  background: var(--js-surface2); border-radius: 99px;
  height: 8px; overflow: hidden; margin-bottom: .4rem;
}
.js-xpbar--sm { height: 6px; width: 120px; margin-bottom: 0; }
.js-xpbar__fill {
  height: 100%; background: linear-gradient(90deg, var(--js-math), var(--js-czech));
  border-radius: 99px; transition: width .4s ease;
}
.js-xpbar__label { font-size: .82rem; color: var(--js-muted); }
.js-profile-link { display: inline-block; margin-top: .5rem; font-size: .85rem; color: var(--js-math); text-decoration: none; }
.js-profile-link:hover { text-decoration: underline; }

/* ── Features ───────────────────────────────────────────── */
.js-features { display: flex; flex-direction: column; gap: .75rem; margin-bottom: 2rem; }
.js-feature {
  display: flex; align-items: flex-start; gap: 1rem;
  background: var(--js-surface); border: 1px solid var(--js-border);
  border-radius: var(--js-radius); padding: .9rem 1.1rem;
}
.js-feature__icon { font-size: 1.8rem; flex-shrink: 0; }
.js-feature p { color: var(--js-muted); font-size: .88rem; margin-top: .2rem; }
.js-feature strong { color: var(--js-text); }

/* ── Demo box ───────────────────────────────────────────── */
.js-demo {
  background: var(--js-surface);
  border: 1px solid var(--js-math);
  border-radius: var(--js-radius);
  padding: 1.5rem;
  text-align: center;
  margin-bottom: 2rem;
}
.js-demo__label { color: var(--js-muted); font-size: .82rem; margin-bottom: .75rem; }
.js-demo__question { font-size: 2rem; font-weight: 800; color: var(--js-text); margin-bottom: 1rem; }
.js-demo__options { display: flex; justify-content: center; gap: .75rem; margin-bottom: 1rem; flex-wrap: wrap; }
.js-demo__opt {
  padding: .5rem 1.2rem; border-radius: 8px;
  font-size: 1.1rem; font-weight: 700;
}
.js-demo__opt--correct { background: rgba(46,213,115,.15); color: var(--js-correct); border: 1px solid var(--js-correct); }
.js-demo__opt--wrong   { background: var(--js-surface2); color: var(--js-muted); border: 1px solid var(--js-border); }
.js-demo__feedback { color: var(--js-correct); font-weight: 600; margin-bottom: 1.25rem; }
.js-demo__cta { margin-top: .5rem; }

/* ── Cards ──────────────────────────────────────────────── */
.js-sections { display: flex; flex-direction: column; gap: 2rem; }
.js-section { margin-bottom: .5rem; }
.js-section__title { font-size: 1.1rem; font-weight: 700; color: var(--js-text); margin-bottom: 1rem; }
.js-section--grade { display: none; }
.js-section--grade.is-active { display: block; }
.js-section__grade-title { font-size: 1.25rem; font-weight: 800; color: var(--js-primary, #2563eb); margin-bottom: 1.25rem; }
.js-section--sub { margin-bottom: 1rem; }
.js-cards { display: flex; flex-direction: column; gap: .75rem; }
.js-card {
  display: flex; align-items: center; gap: 1rem;
  background: var(--js-surface); border: 1px solid var(--js-border);
  border-radius: var(--js-radius); padding: 1rem 1.25rem;
  text-decoration: none; color: var(--js-text);
  box-shadow: var(--js-shadow); transition: transform .15s, border-color .15s, background .15s;
}
.js-card:hover { transform: translateY(-2px); background: var(--js-surface2); }
.js-card--math:hover  { border-color: var(--js-math); }
.js-card--czech:hover { border-color: var(--js-czech); }
.js-card__icon { font-size: 1.8rem; flex-shrink: 0; }
.js-card__body { flex: 1; }
.js-card__label { display: block; font-weight: 600; color: var(--js-text); }
.js-card__desc  { display: block; font-size: .82rem; color: var(--js-muted); margin-top: .15rem; }
.js-card__arrow { color: var(--js-muted); font-size: 1.2rem; }

/* ── Game layout ────────────────────────────────────────── */
.js-game { max-width: 640px; margin: 0 auto; padding: 1.5rem 1rem 4rem; }
.js-game__header {
  display: flex; align-items: center; gap: 1rem;
  margin-bottom: 2rem; flex-wrap: wrap;
}
.js-back { color: var(--js-muted); text-decoration: none; font-size: .9rem; white-space: nowrap; }
.js-back:hover { color: var(--js-text); }
.js-game__title { flex: 1; font-weight: 700; font-size: 1.05rem; color: var(--js-text); }
.js-header-right { display: flex; align-items: center; gap: .75rem; }
.js-score { font-size: .85rem; color: var(--js-muted); white-space: nowrap; }
.js-score__sep { opacity: .4; }
.js-score strong { color: var(--js-text); }
.js-profile-btn { font-size: 1.3rem; text-decoration: none; opacity: .7; }
.js-profile-btn:hover { opacity: 1; }

.js-arena {
  background: var(--js-surface); border: 1px solid var(--js-border);
  border-radius: var(--js-radius); padding: 2rem 1.75rem;
  box-shadow: var(--js-shadow); min-height: 280px;
  display: flex; flex-direction: column; gap: 1.5rem;
  border-top: 4px solid var(--js-border); transition: border-top-color .3s;
}
.js-arena[hidden] { display: none !important; }
.js-arena--correct { border-top-color: var(--js-correct); }
.js-arena--wrong   { border-top-color: var(--js-wrong); }

.js-question__text {
  font-size: 2rem; font-weight: 800; text-align: center;
  color: var(--js-text); letter-spacing: -.5px; line-height: 1.4;
}
.js-blank {
  display: inline-block; min-width: 2.5rem; border-bottom: 3px solid var(--js-math);
  color: var(--js-math); font-weight: 900; margin: 0 .15rem;
}

.js-answer-wrap { display: flex; gap: .75rem; }
.js-answer-input {
  flex: 1; padding: .75rem 1rem; font-size: 1.2rem; font-weight: 700;
  background: var(--js-surface2); border: 1px solid var(--js-border);
  border-radius: 10px; outline: none; color: var(--js-text); transition: border-color .15s;
}
.js-answer-input::placeholder { color: var(--js-muted); }
.js-answer-input:focus { border-color: var(--js-math); }

.js-feedback { text-align: center; animation: js-fade-in .3s ease; }
.js-feedback__icon { font-size: 3rem; margin-bottom: .5rem; }
.js-feedback__msg  { font-size: 1.05rem; font-weight: 600; color: var(--js-text); line-height: 1.5; margin-bottom: .5rem; }
.js-feedback__rule {
  font-size: .88rem; color: var(--js-muted); background: var(--js-surface2);
  border: 1px solid var(--js-border); border-radius: 8px;
  padding: .5rem .75rem; margin-bottom: .75rem; text-align: left; line-height: 1.5;
}
.js-feedback__xp {
  display: inline-block; background: rgba(184,195,255,.15);
  color: var(--js-math); border-radius: 6px; padding: .2rem .6rem;
  font-size: .88rem; font-weight: 700; margin-bottom: .75rem;
}

.js-loading { text-align: center; color: var(--js-muted); font-size: .9rem; padding: 1rem 0; }
.js-loading__dots { display: flex; justify-content: center; gap: 6px; margin-bottom: .5rem; }
.js-loading__dots span { width: 8px; height: 8px; background: var(--js-math); border-radius: 50%; animation: js-bounce .9s infinite ease-in-out; }
.js-loading__dots span:nth-child(2) { animation-delay: .15s; }
.js-loading__dots span:nth-child(3) { animation-delay: .3s; }

/* ── Medal popup ────────────────────────────────────────── */
.js-medal-overlay[hidden], .js-rankup-overlay[hidden] { display: none !important; }

.js-medal-overlay, .js-rankup-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,.75);
  display: flex; align-items: center; justify-content: center;
  z-index: 9999; animation: js-fade-in .2s ease;
}

.js-medal-popup {
  background: #171f33; border: 1px solid #b8c3ff;
  border-radius: 20px; padding: 2.5rem 2rem; text-align: center;
  max-width: 320px; width: 90%; box-shadow: 0 8px 40px rgba(0,0,0,.6);
  animation: js-pop .3s cubic-bezier(.34,1.56,.64,1);
}
.js-medal-popup__emoji { font-size: 4rem; margin-bottom: .75rem; }
.js-medal-popup__title {
  font-size: .85rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: .1em; color: #b8c3ff; margin-bottom: .25rem;
}
.js-medal-popup__name { font-size: 1.4rem; font-weight: 800; color: #dae2fd; margin-bottom: .4rem; }
.js-medal-popup__desc { font-size: .9rem; color: #8e90a2; margin-bottom: 1.25rem; }
.js-medal-popup__btn { width: 100%; }

/* ── Rank-up popup (epic) ───────────────────────────────── */
.js-rankup-popup {
  background: linear-gradient(160deg, #0a1628 0%, #1c0a30 50%, #0a1628 100%);
  border: 2px solid #ffd700;
  border-radius: 22px; padding: 2rem 2rem 2.25rem; text-align: center;
  max-width: 340px; width: 90%;
  box-shadow: 0 0 40px rgba(255,215,0,.25), 0 12px 50px rgba(0,0,0,.85);
  animation: js-pop .4s cubic-bezier(.34,1.56,.64,1);
}
.js-rankup-popup__img {
  width: 160px; height: 160px; border-radius: 14px;
  object-fit: cover; margin: 0 auto .75rem; display: block;
  border: 2px solid rgba(255,215,0,.5);
  box-shadow: 0 4px 20px rgba(0,0,0,.6);
}
.js-rankup-popup__emoji { font-size: 3.5rem; line-height: 1; margin-bottom: .5rem; }
.js-rankup-popup__title {
  font-size: .82rem; font-weight: 800; text-transform: uppercase;
  letter-spacing: .15em; color: #ffd700; margin-bottom: .6rem;
  text-shadow: 0 0 12px rgba(255,215,0,.6);
}
.js-rankup-popup__name {
  font-size: 1.65rem; font-weight: 900; color: #ffffff;
  margin-bottom: 1.5rem; line-height: 1.2;
  text-shadow: 0 2px 8px rgba(0,0,0,.8);
}
.js-rankup-popup__btn {
  width: 100%;
  background: linear-gradient(135deg, #ffd700 0%, #ff9500 100%);
  color: #0a1628; border: none; border-radius: 12px;
  padding: .85rem 1.5rem; font-size: 1.1rem; font-weight: 900;
  cursor: pointer; transition: opacity .15s, transform .1s;
  box-shadow: 0 4px 16px rgba(255,185,0,.45);
  letter-spacing: .02em;
}
.js-rankup-popup__btn:hover { opacity: .88; }
.js-rankup-popup__btn:active { transform: scale(.97); }

/* ── Profile ────────────────────────────────────────────── */
.js-profile { max-width: 720px; margin: 0 auto; padding: 1.5rem 1rem 4rem; }

.js-profile__rank-card {
  background: linear-gradient(135deg, var(--js-surface) 0%, #1e2640 100%);
  border: 1px solid var(--js-math); border-radius: var(--js-radius);
  padding: 1.5rem; display: flex; align-items: center;
  gap: 1.25rem; margin-bottom: 1rem; flex-wrap: wrap;
}
.js-rank-info { flex: 1; }
.js-rank-name { font-size: 1.3rem; font-weight: 800; color: var(--js-math); }
.js-rank-user { font-size: .9rem; color: var(--js-text); }
.js-rank-xp   { font-size: .85rem; color: var(--js-muted); margin-top: .15rem; }
.js-rank-stats-mini { display: flex; gap: .5rem; flex-wrap: wrap; }
.js-stat-pill {
  background: var(--js-surface2); border: 1px solid var(--js-border);
  border-radius: 6px; padding: .3rem .7rem; font-size: .82rem; color: var(--js-text);
}

.js-xpbar-wrap { margin-bottom: 2rem; }
.js-xpbar-wrap .js-xpbar { margin-bottom: .4rem; }

/* ── Motivation ─────────────────────────────────────────── */
.js-motivation {
  background: var(--js-surface); border: 1px solid var(--js-border);
  border-radius: var(--js-radius); padding: 1.25rem 1.5rem;
  display: flex; flex-direction: column; gap: .75rem;
}
.js-motivation__overall { color: var(--js-text); font-size: .95rem; }
.js-motivation__praise  { color: var(--js-correct); font-size: .9rem; }
.js-motivation__focus {
  background: var(--js-surface2); border-left: 3px solid var(--js-math);
  border-radius: 0 8px 8px 0; padding: .75rem 1rem; font-size: .9rem; color: var(--js-text);
}
.js-motivation__tip { color: var(--js-muted); margin-top: .4rem; font-size: .85rem; }
.js-error-rate { color: var(--js-wrong); font-size: .82rem; margin-left: .3rem; }

/* ── Avatar image in rank card ─────────────────────────── */
.js-rank-avatar { font-size: 3.5rem; line-height: 1; width: 4rem; height: 4rem; flex-shrink: 0; display: flex; align-items: center; justify-content: center; }
.js-avatar-img  { width: 4rem; height: 4rem; border-radius: 50%; object-fit: cover; border: 2px solid var(--js-math); }

/* ── Avatar selection grid ──────────────────────────────── */
.js-avatar-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(80px, 1fr)); gap: .6rem;
  margin-bottom: .75rem;
}
.js-avatar-pick {
  background: var(--js-surface); border: 2px solid var(--js-border);
  border-radius: var(--js-radius); padding: .6rem .3rem; text-align: center;
  cursor: pointer; transition: border-color .15s, background .15s;
  display: flex; flex-direction: column; align-items: center; gap: .3rem;
}
.js-avatar-pick:hover { border-color: var(--js-math); background: var(--js-surface2); }
.js-avatar-pick--active { border-color: var(--js-math); background: rgba(46,91,255,.12); }
.js-avatar-pick__img   { width: 3rem; height: 3rem; border-radius: 50%; object-fit: cover; }
.js-avatar-pick__emoji { font-size: 2.2rem; line-height: 1; }
.js-avatar-pick__name  { font-size: .72rem; color: var(--js-muted); }
.js-avatar-note { font-size: .8rem; color: var(--js-muted); margin-top: .25rem; }

/* ── Medals grid ────────────────────────────────────────── */
.js-medal-count { color: var(--js-muted); font-size: .85rem; font-weight: 400; margin-left: .4rem; }
.js-medals-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(90px, 1fr)); gap: .75rem;
}
.js-medal {
  background: var(--js-surface); border: 1px solid var(--js-border);
  border-radius: var(--js-radius); padding: .75rem .5rem; text-align: center;
  transition: transform .15s;
}
.js-medal--earned { border-color: var(--js-math); }
.js-medal--earned:hover { transform: translateY(-2px); }
.js-medal--locked { opacity: .35; filter: grayscale(.8); }
.js-medal__emoji { font-size: 2rem; margin-bottom: .3rem; }
.js-medal__emoji--locked { filter: grayscale(1); }
.js-medal__name { font-size: .72rem; color: var(--js-muted); line-height: 1.3; }
.js-medal--earned .js-medal__name { color: var(--js-text); }

/* ── Mode stats ─────────────────────────────────────────── */
.js-mode-stats { display: flex; flex-direction: column; gap: .75rem; }
.js-mode-stat {
  background: var(--js-surface); border: 1px solid var(--js-border);
  border-radius: var(--js-radius); padding: 1rem 1.25rem;
}
.js-mode-stat__header { display: flex; align-items: center; gap: .75rem; margin-bottom: .6rem; }
.js-mode-stat__icon   { font-size: 1.3rem; }
.js-mode-stat__label  { flex: 1; font-weight: 600; color: var(--js-text); font-size: .95rem; }
.js-mode-stat__bar-wrap { display: flex; align-items: center; gap: .75rem; margin-bottom: .4rem; }
.js-mode-stat__bar { flex: 1; background: var(--js-surface2); border-radius: 99px; height: 6px; overflow: hidden; }
.js-mode-stat__bar-fill { height: 100%; background: linear-gradient(90deg, var(--js-math), var(--js-correct)); border-radius: 99px; }
.js-mode-stat__acc  { font-size: .82rem; color: var(--js-muted); white-space: nowrap; }
.js-mode-stat__counts { display: flex; gap: .5rem; flex-wrap: wrap; }
.js-mode-stat__empty { font-size: .85rem; color: var(--js-muted); }
.js-count { font-size: .82rem; padding: .15rem .5rem; border-radius: 4px; }
.js-count--ok    { background: rgba(46,213,115,.12); color: var(--js-correct); }
.js-count--err   { background: rgba(255,71,87,.12); color: var(--js-wrong); }
.js-count--total { color: var(--js-muted); }

/* ── Recent activity table ──────────────────────────────── */
.js-recent { overflow-x: auto; }
.js-recent__table { width: 100%; border-collapse: collapse; font-size: .88rem; }
.js-recent__table th {
  background: var(--js-surface2); color: var(--js-muted);
  padding: .5rem .75rem; text-align: left; font-weight: 600;
  border-bottom: 1px solid var(--js-border);
}
.js-recent__table td { padding: .5rem .75rem; border-bottom: 1px solid var(--js-border); color: var(--js-text); }
.js-recent__table tr:hover td { background: var(--js-surface); }
.js-recent__date { color: var(--js-muted); font-size: .8rem; }
.js-ok  { color: var(--js-correct); }
.js-err { color: var(--js-wrong); }

/* ── Story selection page ───────────────────────────────── */
.js-genre-section { margin-bottom: 2.5rem; }
.js-genre-desc { color: var(--js-muted); font-size: .88rem; margin: -.5rem 0 1rem; }

.js-story-cards { display: flex; flex-direction: column; gap: .75rem; }
.js-story-card {
  display: flex; align-items: center; gap: 1rem;
  background: var(--js-surface); border: 1px solid var(--js-border);
  border-radius: var(--js-radius); padding: 1rem 1.25rem;
  transition: border-color .15s, transform .15s;
}
.js-story-card:hover { border-color: var(--js-math); transform: translateY(-1px); }
.js-story-card--done { border-color: var(--js-correct); opacity: .8; }
.js-story-card__emoji { font-size: 2.2rem; flex-shrink: 0; }
.js-story-card__body { flex: 1; }
.js-story-card__name { font-weight: 700; color: var(--js-text); font-size: .95rem; }
.js-story-card__desc { font-size: .82rem; color: var(--js-muted); margin-top: .15rem; }
.js-story-card__badge {
  display: inline-block; font-size: .75rem; color: var(--js-correct);
  background: rgba(46,213,115,.1); border-radius: 4px;
  padding: .1rem .4rem; margin-top: .3rem;
}
.js-story-card__btn { flex-shrink: 0; white-space: nowrap; }

/* ── Story banner (in-game) ─────────────────────────────── */
.js-story-banner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 1rem; background: var(--js-surface2); border: 1px solid var(--js-border);
  border-radius: 10px; padding: .6rem 1rem; margin-bottom: 1rem;
  font-size: .82rem; flex-wrap: wrap;
}
.js-story-banner__left { display: flex; align-items: center; gap: .5rem; color: var(--js-text); }
.js-story-banner__emoji { font-size: 1.1rem; }
.js-story-banner__name { font-weight: 700; }
.js-story-banner__chapter { color: var(--js-muted); }
.js-story-banner__right { display: flex; align-items: center; gap: .6rem; flex: 1; min-width: 120px; max-width: 260px; }
.js-story-banner__bar-wrap { display: flex; align-items: center; gap: .5rem; flex: 1; }
.js-story-banner__bar {
  flex: 1; height: 6px; background: var(--js-surface);
  border-radius: 99px; overflow: hidden;
}
.js-story-banner__bar-fill {
  height: 100%; background: linear-gradient(90deg, #00dce5, #b8c3ff);
  border-radius: 99px; transition: width .4s ease;
}
.js-story-banner__count { font-size: .75rem; color: var(--js-muted); white-space: nowrap; }
.js-story-read-btn {
  background: none; border: 1px solid var(--js-border); border-radius: 8px;
  padding: .2rem .4rem; font-size: 1rem; cursor: pointer; line-height: 1;
  color: var(--js-text); opacity: .7; transition: opacity .15s;
  flex-shrink: 0;
}
.js-story-read-btn:hover { opacity: 1; }

/* ── Story reader popup ─────────────────────────────────── */
.js-story-reader-overlay[hidden] { display: none !important; }
.js-story-reader-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,.8);
  display: flex; align-items: center; justify-content: center;
  z-index: 9999; animation: js-fade-in .2s ease;
}
.js-story-reader-popup {
  background: linear-gradient(160deg, #0d1f3c 0%, #0a1628 100%);
  border: 2px solid #00dce5;
  border-radius: 22px; padding: 1.5rem 1.75rem 2rem;
  max-width: 480px; width: 94%; max-height: 80vh;
  display: flex; flex-direction: column;
  box-shadow: 0 0 40px rgba(0,220,229,.15), 0 12px 50px rgba(0,0,0,.85);
  animation: js-pop .35s cubic-bezier(.34,1.56,.64,1);
}
.js-story-reader-popup__header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 1.2rem;
}
.js-story-reader-popup__title {
  font-size: .88rem; font-weight: 800; text-transform: uppercase;
  letter-spacing: .12em; color: #00dce5;
  text-shadow: 0 0 12px rgba(0,220,229,.5);
}
.js-story-reader-popup__close {
  background: none; border: 1px solid rgba(255,255,255,.2); border-radius: 8px;
  color: #8e90a2; font-size: .9rem; padding: .2rem .55rem;
  cursor: pointer; transition: opacity .15s;
}
.js-story-reader-popup__close:hover { opacity: .7; }
.js-story-reader-popup__content {
  overflow-y: auto; flex: 1; display: flex; flex-direction: column; gap: 1.25rem;
}
.js-story-reader-chapter__num {
  font-size: .75rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: .12em; color: #00dce5; margin-bottom: .4rem;
}
.js-story-reader-chapter__text {
  font-size: .93rem; color: #dae2fd; line-height: 1.65;
  background: rgba(255,255,255,.04); border-radius: 10px;
  padding: .8rem 1rem;
}

/* ── Chapter popup ──────────────────────────────────────── */
.js-chapter-overlay[hidden] { display: none !important; }
.js-chapter-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,.8);
  display: flex; align-items: center; justify-content: center;
  z-index: 9999; animation: js-fade-in .2s ease;
}
.js-chapter-popup {
  background: linear-gradient(160deg, #0d1f3c 0%, #0a1628 100%);
  border: 2px solid #00dce5;
  border-radius: 22px; padding: 2rem 2rem 2.25rem; text-align: center;
  max-width: 400px; width: 92%;
  box-shadow: 0 0 40px rgba(0,220,229,.15), 0 12px 50px rgba(0,0,0,.85);
  animation: js-pop .4s cubic-bezier(.34,1.56,.64,1);
}
.js-chapter-popup__num {
  font-size: .8rem; font-weight: 800; text-transform: uppercase;
  letter-spacing: .15em; color: #00dce5; margin-bottom: .3rem;
  text-shadow: 0 0 12px rgba(0,220,229,.5);
}
.js-chapter-popup__story {
  font-size: .88rem; color: #8e90a2; margin-bottom: 1rem;
}
.js-chapter-popup__text {
  font-size: .95rem; color: #dae2fd; line-height: 1.65;
  text-align: left; margin-bottom: 1.5rem;
  background: rgba(255,255,255,.04); border-radius: 10px;
  padding: .9rem 1rem;
}
.js-chapter-popup__finish-icon { font-size: 3rem; margin-bottom: .5rem; }
.js-chapter-popup__finish-msg {
  color: #dae2fd; font-size: 1rem; font-weight: 600; margin-bottom: 1rem;
}
.js-chapter-popup__finished { margin-bottom: 1rem; }
.js-chapter-popup__btn {
  width: 100%;
  background: linear-gradient(135deg, #00dce5 0%, #b8c3ff 100%);
  color: #001356; border: none; border-radius: 12px;
  padding: .85rem 1.5rem; font-size: 1.05rem; font-weight: 900;
  cursor: pointer; transition: opacity .15s, transform .1s;
  box-shadow: 0 4px 16px rgba(0,220,229,.3);
  letter-spacing: .02em;
}
.js-chapter-popup__btn:hover { opacity: .88; }
.js-chapter-popup__btn:active { transform: scale(.97); }

/* ── Animations ─────────────────────────────────────────── */
@keyframes js-fade-in {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes js-bounce {
  0%, 80%, 100% { transform: scale(0); }
  40%           { transform: scale(1); }
}
@keyframes js-pop {
  0%   { transform: scale(.6); opacity: 0; }
  100% { transform: scale(1); opacity: 1; }
}

/* ── Responsive ─────────────────────────────────────────── */
@media (max-width: 480px) {
  .js-question__text { font-size: 1.5rem; }
  .js-answer-wrap    { flex-direction: column; }
  .js-btn--primary:not(.js-btn--small) { width: 100%; }
  .js-profile__rank-card { flex-direction: column; text-align: center; }
  .js-rank-stats-mini { justify-content: center; }
}

/* ── Arcade lobby ────────────────────────────────────────── */
.js-arcade { --js-math: #b8c3ff; --js-text: #dae2fd; --js-muted: #8e90a2;
  --js-surface: #171f33; --js-surface2: #222a3d; --js-border: #434656;
  --js-radius: 14px; --js-shadow: 0 2px 12px rgba(0,0,0,.35); }

.js-arcade-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1.25rem; margin-top: 1.5rem;
}
.js-arcade-card {
  background: var(--js-surface); border: 1px solid var(--js-border);
  border-radius: var(--js-radius); padding: 1.5rem 1rem;
  text-align: center; text-decoration: none; color: var(--js-text);
  display: flex; flex-direction: column; align-items: center; gap: .75rem;
  transition: transform .15s, border-color .15s;
}
.js-arcade-card:hover { transform: translateY(-3px); border-color: var(--js-math); }
.js-arcade-card__emoji { font-size: 2.8rem; }
.js-arcade-card__name  { font-size: 1.1rem; font-weight: 700; }
.js-arcade-card__desc  { font-size: .82rem; color: var(--js-muted); flex: 1; }
.js-arcade-card__btn   { margin-top: .5rem; }

/* ── Game canvas wrapper ─────────────────────────────────── */
.js-game-wrap {
  --js-math: #b8c3ff; --js-text: #dae2fd; --js-muted: #8e90a2;
  --js-surface: #171f33; --js-surface2: #222a3d; --js-border: #434656;
  --js-radius: 14px;
  max-width: 520px; margin: 0 auto; padding: .75rem;
}
.js-game-header {
  display: flex; align-items: center; gap: .75rem;
  margin-bottom: .75rem; flex-wrap: wrap;
}
.js-game-score-wrap { margin-left: auto; font-size: .9rem; color: var(--js-muted); }
.js-game-score-wrap strong { color: var(--js-text); }

.js-canvas-wrap { position: relative; }
#js-game-canvas {
  display: block; width: 100%;
  border-radius: var(--js-radius);
  border: 1px solid var(--js-border);
  background: #0d1220;
}
.js-game-overlay {
  position: absolute; inset: 0; display: flex;
  align-items: center; justify-content: center;
  background: rgba(10,14,25,.8); border-radius: var(--js-radius);
}
.js-game-overlay[hidden] { display: none !important; }
.js-game-overlay__box { text-align: center; }
.js-game-overlay__title { font-size: 1.5rem; font-weight: 800;
  color: var(--js-text); margin-bottom: .5rem; }
.js-game-overlay__score { font-size: 1rem; color: var(--js-math);
  margin-bottom: 1.25rem; }

/* ── Chest grid ───────────────────────────────────────────────── */
.js-chest-grid { grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 1.5rem; }

.js-chest {
  perspective: 800px;
  cursor: pointer;
  display: flex; flex-direction: column;
  border-radius: var(--js-radius);
  overflow: hidden;
  background: var(--js-surface);
  border: 1px solid var(--js-border);
  transition: border-color .2s, box-shadow .2s;
}
.js-chest:hover { border-color: var(--js-math); box-shadow: 0 4px 18px rgba(184,195,255,.12); }

/* Víko */
.js-chest__lid {
  background: #2a1a00;
  border-bottom: 2px solid #7a4a00;
  transform-origin: top center;
  transition: transform .6s cubic-bezier(.4,0,.2,1);
  padding: .8rem 1rem .5rem;
  display: flex; align-items: center; justify-content: center;
}
.js-chest--locked .js-chest__lid  { background: #1a1428; border-bottom-color: #3a2a5a; }
.js-chest--opening .js-chest__lid { transform: rotateX(-110deg); }
.js-chest__lid-icon { font-size: 1.6rem; }

/* Tělo */
.js-chest__body {
  padding: 1rem;
  display: flex; flex-direction: column; align-items: center;
  gap: .5rem; text-align: center; flex: 1;
}
.js-chest__game-emoji  { font-size: 2.6rem; }
.js-chest__game-name   { font-weight: 700; color: var(--js-text); font-size: 1.05rem; }
.js-chest__game-desc   { font-size: .8rem; color: var(--js-muted); flex: 1; }
.js-chest__play-btn    { margin-top: .4rem; width: 100%; }
.js-chest__mystery     { font-size: 2.8rem; color: #4a3a6a; filter: blur(1px); }
.js-chest__mystery-text{ font-size: .85rem; color: var(--js-muted); }
.js-chest__locked-hint { font-size: .78rem; color: var(--js-muted); padding: .3rem .6rem;
  background: rgba(255,255,255,.04); border-radius: 6px; }
.js-chest__open-btn    { margin-top: .4rem; width: 100%; }

/* Otevřená truhla – zvýrazní se */
.js-chest--open { border-color: rgba(184,195,255,.3); }
.js-chest--open .js-chest__lid { background: #3a2200; border-bottom-color: #aa6600; }
.js-chest--just-opened { animation: chestGlow .8s ease-out; }
@keyframes chestGlow {
  0%   { box-shadow: 0 0 0 0 rgba(255,200,50,.6); }
  60%  { box-shadow: 0 0 30px 10px rgba(255,200,50,.3); }
  100% { box-shadow: none; }
}

/* ── Arcade status banners ────────────────────────────────────── */
.js-arcade-locked-banner {
  display: flex; align-items: center; gap: .75rem;
  background: rgba(255,80,80,.1); border: 1px solid rgba(255,80,80,.25);
  border-radius: var(--js-radius); padding: .9rem 1.2rem; margin-bottom: 1.5rem;
  color: #ffaaaa; font-size: .92rem;
}
.js-arcade-locked-banner__icon { font-size: 1.4rem; }

.js-arcade-open-banner {
  text-align: center; color: var(--js-math);
  font-size: .9rem; margin-bottom: 1.25rem; opacity: .85;
}

/* ── Časová lišta ─────────────────────────────────────────────── */
.js-arcade-time-bar {
  background: rgba(184,195,255,.07); border: 1px solid var(--js-border);
  border-radius: var(--js-radius); padding: .75rem 1rem; margin-bottom: 1.5rem;
}
.js-arcade-time-bar__label { font-size: .85rem; color: var(--js-muted); margin-bottom: .4rem; }
.js-arcade-time-bar__label strong { color: var(--js-text); }
.js-arcade-time-bar__track {
  height: 6px; background: rgba(255,255,255,.08); border-radius: 4px; overflow: hidden;
}
.js-arcade-time-bar__fill {
  height: 100%; background: var(--js-math); border-radius: 4px;
  transition: width .5s ease;
}

/* ── Time-up overlay (in-game) ────────────────────────────────── */
.js-game-time-overlay {
  position: absolute; inset: 0; display: flex;
  align-items: center; justify-content: center;
  background: rgba(10,14,25,.9); border-radius: var(--js-radius);
  z-index: 10;
}
.js-game-time-overlay[hidden] { display: none !important; }

/* ── Grade tabs ──────────────────────────────────────────────────────────── */
.js-grade-tabs { display: flex; gap: .75rem; margin-bottom: 1.75rem; flex-wrap: wrap; }
.js-grade-tab { display: flex; align-items: center; gap: .5rem; padding: .6rem 1.4rem; border-radius: 999px; border: 2px solid transparent; background: rgba(255,255,255,.07); color: var(--js-text, #e2e8f0); font-size: 1rem; font-weight: 600; cursor: pointer; transition: background .15s, border-color .15s, color .15s; }
.js-grade-tab:hover { background: rgba(255,255,255,.13); }
.js-grade-tab.is-active { border-color: var(--js-primary, #6c8ebf); background: rgba(108,142,191,.18); color: var(--js-primary, #6c8ebf); }