/* =====================================================================
 * 365 Flash Cards Training — Styles  (Rugged Shop / Industrial)
 * Brandable via the :root variables. No framework.
 * ===================================================================== */
:root{
  --brand:#d11f2a;          /* 365 red */
  --brand-dark:#9c121b;
  --steel:#1d2733;          /* gunmetal */
  --steel-2:#2b3a4d;
  --ink:#0f1722;
  --ink-soft:#5a6b7e;
  --bg:#e7ebf0;
  --bg-2:#dde3ea;
  --surface:#ffffff;
  --surface-2:#f4f7fa;
  --line:#cdd6e0;
  --good:#1f9d55;
  --warn:#cc7a00;
  --amber:#f2b705;
  --radius:14px;
  --radius-lg:20px;
  --shadow:0 10px 30px rgba(15,23,34,.14);
  --shadow-sm:0 3px 10px rgba(15,23,34,.10);
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --mono:"SF Mono",ui-monospace,Menlo,Consolas,monospace;
}
*{box-sizing:border-box;}
html,body{margin:0;padding:0;}
body{
  font-family:var(--font); color:var(--ink); min-height:100vh;
  background:
    linear-gradient(180deg,#eef2f6 0%,var(--bg) 60%,var(--bg-2) 100%);
}
#app{max-width:940px;margin:0 auto;padding:14px clamp(12px,3vw,24px) 48px;}

/* ---------- Top bar ---------- */
.topbar{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;padding:10px 0 16px;}
.brand{display:flex;align-items:center;gap:13px;cursor:pointer;}
.brand-badge{
  background:var(--brand);color:#fff;font-weight:900;letter-spacing:.5px;
  width:50px;height:50px;border-radius:12px;display:grid;place-items:center;font-size:19px;
  box-shadow:var(--shadow-sm);border:2px solid rgba(255,255,255,.25);
  transform:skewX(-4deg);
}
.brand-text strong{display:block;font-size:18px;letter-spacing:.2px;text-transform:uppercase;}
.brand-text small{color:var(--ink-soft);font-size:12px;}

.modes{display:flex;gap:8px;flex-wrap:wrap;}
.mode-btn{
  border:1px solid var(--line);background:var(--surface);color:var(--ink-soft);
  padding:9px 15px;border-radius:10px;font-weight:700;cursor:pointer;font-size:14px;transition:.15s;
}
.mode-btn:hover{border-color:var(--brand);color:var(--brand);}
.mode-btn.is-active{background:var(--steel);color:#fff;border-color:var(--steel);}
.mode-btn.ghost{background:transparent;}

/* ---------- Screens ---------- */
.screen{animation:fade .25s ease;}
@keyframes fade{from{opacity:0;transform:translateY(6px);}to{opacity:1;transform:none;}}

/* ---------- Hero ---------- */
.hero{
  background:
    repeating-linear-gradient(45deg,rgba(242,183,5,.14) 0 14px,transparent 14px 28px) top/100% 8px no-repeat,
    linear-gradient(135deg,var(--steel) 0%,var(--steel-2) 100%);
  color:#fff;border-radius:var(--radius-lg);padding:30px clamp(20px,4vw,40px) 28px;
  box-shadow:var(--shadow);margin-bottom:16px;border:1px solid rgba(0,0,0,.2);
}
.hero h1{margin:8px 0 8px;font-size:clamp(22px,3.4vw,32px);letter-spacing:.3px;line-height:1.12;}
.hero p{margin:0;color:#c4d0dd;max-width:60ch;font-size:15px;line-height:1.5;}

/* ---------- Mode picker ---------- */
.mode-picker{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-bottom:16px;}
.mode-card{
  text-align:left;background:var(--surface);border:1px solid var(--line);border-left:5px solid var(--line);
  border-radius:var(--radius);padding:16px 16px;cursor:pointer;transition:.15s;display:flex;flex-direction:column;gap:3px;
}
.mode-card:hover{border-color:var(--brand);border-left-color:var(--brand);transform:translateY(-2px);box-shadow:var(--shadow-sm);}
.mode-card.is-active{border-left-color:var(--brand);background:var(--surface);box-shadow:var(--shadow-sm);outline:2px solid rgba(209,31,42,.25);}
.mode-card-ico{font-size:22px;line-height:1;color:var(--brand);}
.mode-card strong{font-size:15px;}
.mode-card small{color:var(--ink-soft);font-size:12px;}

/* ---------- Setup / filters ---------- */
.setup-card,.results-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow);padding:clamp(18px,4vw,30px);}
.setup-head{border-bottom:1px solid var(--line);padding-bottom:14px;margin-bottom:18px;}
.setup-head h2{margin:0 0 4px;font-size:21px;text-transform:uppercase;letter-spacing:.5px;}
.lede{color:var(--ink-soft);margin:0;}

.filters{display:grid;gap:20px;}
.filter-group{}
.filter-head{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:9px;}
.filter-head h3{margin:0;font-size:12px;text-transform:uppercase;letter-spacing:.7px;color:var(--steel);font-weight:800;}
.filter-ctrls{display:flex;gap:6px;}
.mini-btn{border:1px solid var(--line);background:var(--surface-2);color:var(--ink-soft);font-size:11px;font-weight:700;padding:3px 9px;border-radius:7px;cursor:pointer;text-transform:uppercase;letter-spacing:.4px;}
.mini-btn:hover{border-color:var(--steel);color:var(--steel);}

.chips{display:flex;flex-wrap:wrap;gap:8px;}
.chip{
  border:1px solid var(--line);background:var(--surface-2);color:var(--ink);
  padding:7px 12px;border-radius:9px;cursor:pointer;font-size:13px;font-weight:600;transition:.12s;user-select:none;
  display:inline-flex;align-items:center;gap:7px;
}
.chip:hover{border-color:var(--brand);}
.chip.on{background:var(--brand);border-color:var(--brand);color:#fff;}
.chip.level.on{background:var(--steel);border-color:var(--steel);}
.chip-n{font-size:11px;font-weight:800;background:rgba(0,0,0,.08);color:inherit;border-radius:20px;padding:1px 7px;min-width:20px;text-align:center;}
.chip.on .chip-n{background:rgba(255,255,255,.25);}
.chip.empty{opacity:.5;}

.setup-footer{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-top:24px;flex-wrap:wrap;border-top:1px solid var(--line);padding-top:18px;}
.deck-count{font-weight:800;color:var(--steel);font-size:15px;text-transform:uppercase;letter-spacing:.4px;}

.primary-btn{
  background:var(--brand);color:#fff;border:none;cursor:pointer;padding:13px 24px;border-radius:11px;
  font-weight:800;font-size:15px;box-shadow:var(--shadow-sm);transition:.15s;text-transform:uppercase;letter-spacing:.4px;
}
.primary-btn:hover{background:var(--brand-dark);}
.primary-btn:disabled{background:#aab4c0;cursor:not-allowed;box-shadow:none;}

/* ---------- Progress ---------- */
.progress-row{display:flex;align-items:center;gap:14px;margin:6px 0 18px;}
.progress-bar{flex:1;height:9px;background:#cfd8e2;border-radius:999px;overflow:hidden;border:1px solid rgba(0,0,0,.05);}
.progress-bar span{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--brand),#f0563f);transition:width .3s;}
.counter{font-size:13px;color:var(--ink-soft);font-weight:700;white-space:nowrap;}

/* ---------- Flashcard ---------- */
.card-stage{perspective:1500px;margin-bottom:18px;}
.flashcard{width:100%;min-height:340px;cursor:pointer;outline:none;}
.flashcard-inner{position:relative;width:100%;min-height:340px;transition:transform .5s cubic-bezier(.2,.8,.2,1);transform-style:preserve-3d;}
.flashcard.flipped .flashcard-inner{transform:rotateY(180deg);}
.flashcard:focus-visible .flashcard-inner{box-shadow:0 0 0 3px rgba(209,31,42,.45);border-radius:var(--radius-lg);}
.face{position:absolute;inset:0;backface-visibility:hidden;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow);padding:clamp(20px,4vw,34px);display:flex;flex-direction:column;}
.face.front{border-top:6px solid var(--brand);}
.face.back{transform:rotateY(180deg);border-top:6px solid var(--steel);}
.face-label{font-size:12px;text-transform:uppercase;letter-spacing:.8px;color:var(--steel);font-weight:800;margin-bottom:10px;}
.face-content{font-size:clamp(18px,2.6vw,22px);line-height:1.45;flex:1;display:flex;align-items:center;font-weight:500;}
.face.back .face-content{font-weight:400;}

.face-tags{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:14px;}
.tag{font-size:11px;font-weight:800;padding:3px 9px;border-radius:7px;background:#eef2f7;color:var(--steel);border:1px solid var(--line);text-transform:uppercase;letter-spacing:.3px;}
.tag.level{background:var(--steel);color:#fff;border-color:var(--steel);}
.tag.fuel{background:#eaf3ff;color:#1c4e80;border-color:#c7ddf5;}
.tag.id-tag{background:var(--amber);color:#3a2c00;border-color:#d9a400;}
.tag.era-obsolete{background:#fce8e6;color:var(--brand-dark);border-color:#f5c6c0;}
.tag.era-emerging{background:#e7f6ee;color:var(--good);border-color:#bfe6cf;}
.tag.era-heritage{background:#f3ecdd;color:#7a5b16;border-color:#e2d3b0;}

.flip-cue{text-align:center;color:#9aa7b6;font-size:12px;margin-top:12px;}
.hint-btn{align-self:flex-start;margin-top:10px;background:var(--surface-2);border:1px solid var(--line);color:var(--steel);padding:6px 12px;border-radius:8px;cursor:pointer;font-weight:700;font-size:13px;}
.hint-text{margin-top:10px;color:var(--warn);font-style:italic;font-size:15px;}
.region-values{margin-top:14px;display:grid;gap:6px;font-size:14px;border-top:1px dashed var(--line);padding-top:12px;}
.region-values b{color:var(--steel);}

/* ---------- Study controls ---------- */
.study-controls{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap;}
.nav-btn{border:1px solid var(--line);background:var(--surface);color:var(--ink);padding:11px 17px;border-radius:10px;cursor:pointer;font-weight:700;}
.nav-btn:hover{border-color:var(--steel);}
.nav-btn:disabled{opacity:.45;cursor:not-allowed;}
.confidence{display:flex;align-items:center;gap:8px;flex-wrap:wrap;font-size:13px;color:var(--ink-soft);}
.conf-btn{border:none;cursor:pointer;padding:10px 17px;border-radius:10px;font-weight:800;color:#fff;text-transform:uppercase;letter-spacing:.3px;font-size:12px;}
.conf-btn.again{background:var(--brand);}
.conf-btn.good{background:var(--steel);}
.conf-btn.easy{background:var(--good);}

/* ---------- Quiz / Identify ---------- */
.quiz-card{background:var(--surface);border:1px solid var(--line);border-top:6px solid var(--brand);border-radius:var(--radius-lg);box-shadow:var(--shadow);padding:clamp(20px,4vw,32px);}
.quiz-figure{margin:0 0 16px;background:var(--surface-2);border:1px solid var(--line);border-radius:var(--radius);padding:10px;display:grid;place-items:center;}
.quiz-figure img{max-width:100%;max-height:260px;border-radius:8px;display:block;}
.quiz-question{font-size:clamp(18px,2.6vw,22px);line-height:1.4;margin:6px 0 18px;}
.quiz-options{display:grid;gap:10px;}
.quiz-opt{text-align:left;border:1px solid var(--line);background:var(--surface-2);color:var(--ink);padding:14px 16px;border-radius:11px;cursor:pointer;font-size:15px;font-weight:600;transition:.12s;line-height:1.4;}
.quiz-opt:hover:not(:disabled){border-color:var(--brand);background:#fff;}
.quiz-opt.correct{background:#e7f6ee;border-color:var(--good);color:#14663a;font-weight:700;}
.quiz-opt.wrong{background:#fce8e6;border-color:var(--brand);color:var(--brand-dark);}
.quiz-opt:disabled{cursor:default;}
.quiz-feedback{margin:16px 0;padding:14px 16px;border-radius:11px;background:var(--surface-2);font-size:15px;line-height:1.5;}
.quiz-feedback.ok{background:#e7f6ee;}
.quiz-feedback.no{background:#fce8e6;}
#quizNextBtn{margin-top:6px;}

/* ---------- Results ---------- */
.results-card{text-align:center;}
.results-card h1{text-transform:uppercase;letter-spacing:.5px;font-size:22px;margin:0 0 4px;}
.score-big{font-size:66px;font-weight:900;color:var(--brand);line-height:1;margin:12px 0;}
.results-actions{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-top:20px;}

/* ---------- Footer ---------- */
.appfoot{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-top:28px;padding-top:14px;border-top:1px solid var(--line);color:#90a0b0;font-size:12px;}

/* ---------- Mobile ---------- */
@media (max-width:680px){
  .mode-picker{grid-template-columns:1fr;}
}
@media (max-width:560px){
  .study-controls{flex-direction:column;}
  .confidence{order:-1;}
  .nav-btn{width:100%;}
  .modes{width:100%;}
}

/* ---------- Section labels (home) ---------- */
.section-label{display:flex;align-items:center;gap:8px;font-size:13px;font-weight:800;text-transform:uppercase;letter-spacing:.8px;color:var(--steel);margin:22px 2px 10px;}
.section-label span{background:var(--brand);color:#fff;width:22px;height:22px;border-radius:6px;display:grid;place-items:center;font-size:12px;}
.gallery-hint{color:var(--ink-soft);font-size:13px;margin:0 2px 14px;}

/* ---------- Deck gallery (single-select cards) ---------- */
.card-gallery{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:14px;}
.gcard{position:relative;border:1px solid var(--line);border-radius:14px;background:var(--surface);cursor:pointer;overflow:hidden;padding:8px;transition:.15s;box-shadow:var(--shadow-sm);}
.gcard:hover{transform:translateY(-4px);border-color:var(--brand);box-shadow:var(--shadow);}
.gcard:active{transform:translateY(-1px);}
.gcard-art{border-radius:9px;overflow:hidden;display:block;background:var(--surface-2);}
.gcard-art img{width:100%;display:block;}
.gcard-art.noimg{aspect-ratio:32/44;display:grid;place-items:center;padding:14px;text-align:center;}
.gcard-fallback{font-weight:800;color:var(--steel);text-transform:uppercase;font-size:14px;letter-spacing:.5px;}
.gcard-count{position:absolute;top:14px;right:14px;background:var(--steel);color:#fff;font-weight:800;font-size:12px;border-radius:20px;padding:3px 10px;border:2px solid #fff;box-shadow:var(--shadow-sm);}
.gcard.selected{border-color:var(--brand);outline:3px solid var(--brand);outline-offset:-1px;}
.gcard.selected::after{content:"\2713";position:absolute;top:12px;left:12px;background:var(--brand);color:#fff;width:26px;height:26px;border-radius:50%;display:grid;place-items:center;font-weight:900;border:2px solid #fff;}
.gcard.empty{opacity:.5;filter:grayscale(.55);cursor:not-allowed;}
.gcard.empty .gcard-count{background:#9aa7b6;}

/* ---------- Advanced (refine) panel ---------- */
.advanced{margin-top:22px;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);overflow:hidden;box-shadow:var(--shadow-sm);}
.advanced summary{cursor:pointer;padding:15px 18px;font-weight:800;color:var(--steel);font-size:13px;text-transform:uppercase;letter-spacing:.5px;list-style:none;display:flex;align-items:center;gap:8px;user-select:none;}
.advanced summary::-webkit-details-marker{display:none;}
.advanced summary::before{content:"\25B8";color:var(--brand);font-size:14px;transition:.15s;}
.advanced[open] summary::before{transform:rotate(90deg);}
.advanced summary:hover{color:var(--brand);}
.advanced-body{padding:4px 18px 18px;border-top:1px solid var(--line);}
.advanced-body .filters{margin-top:16px;}

@media (max-width:680px){
  .card-gallery{grid-template-columns:repeat(2,1fr);}
}

/* ---------- Brand logo (header) ---------- */
.brand-badge{width:52px;height:52px;display:grid;place-items:center;position:relative;background:none;border:none;box-shadow:none;transform:none;border-radius:0;}
.brand-badge img{width:52px;height:52px;border-radius:50%;object-fit:contain;display:block;background:#fff;box-shadow:var(--shadow-sm);}
.brand-fallback{display:none;}
.brand-badge.no-logo{background:var(--brand);border-radius:12px;transform:skewX(-4deg);border:2px solid rgba(255,255,255,.25);box-shadow:var(--shadow-sm);}
.brand-badge.no-logo img{display:none;}
.brand-badge.no-logo .brand-fallback{display:block;color:#fff;font-weight:900;font-size:19px;letter-spacing:.5px;}

/* ---------- Infographic image cards (full-bleed faces) ---------- */
.face-img{position:absolute;inset:0;border-radius:var(--radius-lg);overflow:hidden;background:#fff;display:none;}
.face.img-mode{padding:0;}
.face.img-mode .face-img{display:block;}
.face.img-mode .face-tags,.face.img-mode .face-content,.face.img-mode .hint-btn,
.face.img-mode .hint-text,.face.img-mode .face-label,.face.img-mode .region-values,
.face.img-mode .flip-cue{display:none;}
.face-img img{width:100%;height:100%;object-fit:contain;display:block;background:#fff;}
.face-img.sheet{background-size:200% 100%;background-repeat:no-repeat;}
.face-img.sheet.left{background-position:left center;}
.face-img.sheet.right{background-position:right center;}

/* ---------- Header right (points + history) ---------- */
.header-right{display:flex;align-items:center;gap:8px;flex-wrap:wrap;}
.points-badge{background:var(--amber);color:#3a2c00;font-weight:900;font-size:14px;padding:7px 13px;border-radius:10px;border:2px solid #d9a400;white-space:nowrap;box-shadow:var(--shadow-sm);}

/* ---------- Category detail head ---------- */
.cat-head{display:flex;align-items:center;gap:12px;margin:6px 0 18px;flex-wrap:wrap;}
.cat-head h2{margin:0;font-size:22px;text-transform:uppercase;letter-spacing:.5px;flex:1;}
.cat-mode{background:var(--steel);color:#fff;font-size:11px;font-weight:800;text-transform:uppercase;letter-spacing:.5px;padding:5px 11px;border-radius:8px;}

/* ---------- Sub-chips (single-select system + difficulty) ---------- */
.subchips{display:flex;flex-wrap:wrap;gap:9px;margin-bottom:6px;}
.subchip{border:1px solid var(--line);background:var(--surface);color:var(--ink);padding:10px 15px;border-radius:11px;cursor:pointer;font-size:14px;font-weight:700;transition:.12s;display:inline-flex;align-items:center;gap:8px;box-shadow:var(--shadow-sm);}
.subchip:hover{border-color:var(--brand);}
.subchip.active{background:var(--brand);border-color:var(--brand);color:#fff;}
.subchip-n{font-size:11px;font-weight:800;background:rgba(0,0,0,.09);border-radius:20px;padding:1px 8px;min-width:22px;text-align:center;}
.subchip.active .subchip-n{background:rgba(255,255,255,.28);}
.subchip.empty{opacity:.4;cursor:not-allowed;box-shadow:none;}

/* ---------- Results points ---------- */
.results-points{margin:14px auto 0;background:var(--surface-2);border:1px solid var(--line);border-radius:12px;padding:12px 16px;font-size:15px;color:var(--steel);display:inline-block;}
.results-points strong{color:var(--brand);font-size:18px;}

/* ---------- History ---------- */
.stats-row{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-bottom:22px;}
.stat{background:var(--surface);border:1px solid var(--line);border-top:4px solid var(--brand);border-radius:var(--radius);padding:16px 12px;text-align:center;box-shadow:var(--shadow-sm);}
.stat-n{font-size:24px;font-weight:900;color:var(--steel);}
.stat-l{font-size:11px;text-transform:uppercase;letter-spacing:.6px;color:var(--ink-soft);font-weight:700;margin-top:3px;}
.history-head{display:flex;align-items:center;justify-content:space-between;gap:10px;margin:6px 0 12px;}
.history-head h3{margin:0;font-size:14px;text-transform:uppercase;letter-spacing:.6px;color:var(--steel);}
.history-list{display:grid;gap:10px;}
.hrow{background:var(--surface);border:1px solid var(--line);border-left:4px solid var(--brand);border-radius:12px;padding:13px 15px;box-shadow:var(--shadow-sm);}
.hrow-meta{display:flex;flex-wrap:wrap;align-items:center;gap:6px;margin-bottom:8px;}
.hrow-time{font-size:11px;color:var(--ink-soft);font-weight:700;margin-left:auto;}
.hrow-q{font-weight:600;line-height:1.4;margin-bottom:5px;}
.hrow-a{font-size:14px;color:#14663a;}
.hrow-a b{color:var(--steel);}
.empty-note{color:var(--ink-soft);background:var(--surface-2);border:1px dashed var(--line);border-radius:12px;padding:20px;text-align:center;}

@media (max-width:560px){ .stats-row{grid-template-columns:repeat(2,1fr);} }

/* ---------- System picker as image cards (mirrors the home gallery) ---------- */
#systemChips{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:14px;margin-bottom:6px;}
.systile{position:relative;border:1px solid var(--line);border-radius:14px;background:var(--surface);cursor:pointer;overflow:hidden;padding:8px;transition:.15s;box-shadow:var(--shadow-sm);}
.systile:hover{transform:translateY(-4px);border-color:var(--brand);box-shadow:var(--shadow);}
.systile.active{border-color:var(--brand);outline:3px solid var(--brand);outline-offset:-1px;}
.systile.active::after{content:"\2713";position:absolute;top:12px;left:12px;background:var(--brand);color:#fff;width:24px;height:24px;border-radius:50%;display:grid;place-items:center;font-weight:900;border:2px solid #fff;font-size:13px;z-index:2;}
.systile-art{border-radius:9px;overflow:hidden;display:block;background:var(--surface-2);aspect-ratio:32/44;}
.systile-art img{width:100%;height:100%;object-fit:cover;display:block;}
.systile-art.noimg{display:grid;place-items:center;padding:14px;text-align:center;background:linear-gradient(135deg,var(--steel),var(--steel-2));}
.systile-fallback{font-weight:800;color:#fff;text-transform:uppercase;font-size:13px;letter-spacing:.4px;line-height:1.2;}
.systile-n{position:absolute;top:14px;right:14px;background:var(--steel);color:#fff;font-weight:800;font-size:12px;border-radius:20px;padding:3px 10px;border:2px solid #fff;box-shadow:var(--shadow-sm);}
@media (max-width:560px){ #systemChips{grid-template-columns:repeat(2,1fr);} }