:root{
  --bg:#0f1115; --panel:#1a1d24; --panel2:#232730; --line:#2c313c;
  --text:#e7e9ee; --muted:#9aa0aa; --accent:#6ea8fe;
  --again:#e5534b; --hard:#d8923b; --good:#4caf72; --easy:#4a90d9;
  --radius:14px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{background:var(--bg);color:var(--text);font-family:-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;line-height:1.5;-webkit-font-smoothing:antialiased}
.wrap{max-width:900px;margin:0 auto;padding:0 18px 90px}
header{position:sticky;top:0;z-index:10;background:rgba(15,17,21,.85);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.bar-top{max-width:900px;margin:0 auto;padding:12px 18px;display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.brand{font-weight:700;font-size:18px;margin-right:auto;letter-spacing:.2px}
.brand span{color:var(--accent)}
nav{display:flex;gap:6px;flex-wrap:wrap}
nav button{background:transparent;color:var(--muted);border:1px solid transparent;padding:7px 12px;border-radius:10px;cursor:pointer;font-size:14px}
nav button:hover{color:var(--text);background:var(--panel)}
nav button.active{color:var(--text);background:var(--panel);border-color:var(--line)}

h2{font-size:21px;margin:20px 0 6px}
h3{margin:0 0 8px}
.muted{color:var(--muted)}.small{font-size:13px}

.btn{background:var(--accent);color:#07203f;border:none;font-weight:650;padding:10px 16px;border-radius:11px;cursor:pointer;font-size:15px}
.btn:hover{filter:brightness(1.06)}
.btn.ghost{background:var(--panel2);color:var(--text);border:1px solid var(--line);font-weight:500}
.btn.ghost:hover{background:var(--panel)}
.btn.danger{background:transparent;color:var(--again);border:1px solid var(--again)}
.btn.danger:hover{background:rgba(229,83,75,.12)}
.btn:disabled{opacity:.4;cursor:not-allowed}
.btn.sm{padding:6px 11px;font-size:13px;border-radius:9px}

.card-box{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:18px;margin:12px 0}
.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.spacer{flex:1}

textarea,input[type=text],select{width:100%;background:var(--panel2);color:var(--text);border:1px solid var(--line);border-radius:10px;padding:11px 12px;font-size:15px;font-family:inherit}
textarea{min-height:230px;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:14px;line-height:1.55;resize:vertical}
label{display:block;font-size:13px;color:var(--muted);margin:14px 0 5px}

/* ---- Dashboard ---- */
.book{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);margin:12px 0;overflow:hidden}
.book-head{display:flex;align-items:center;gap:14px;padding:16px 18px;cursor:pointer}
.book-head:hover{background:var(--panel2)}
.chev{color:var(--muted);width:14px;flex:none}
.book-main{flex:1;min-width:0}
.book-name{font-weight:700;font-size:18px}
.book-stats{text-align:right;white-space:nowrap}
.book-stats .pct{font-weight:700;font-size:19px}
.bar{height:8px;background:#0d0f13;border:1px solid var(--line);border-radius:999px;overflow:hidden;margin-top:7px}
.bar.mini{height:6px;margin-top:0}
.bar>i{display:block;height:100%;width:0}
.book-actions{display:flex;gap:8px;align-items:center;flex:none}
.iconbtn{background:var(--panel2);border:1px solid var(--line);color:var(--muted);width:34px;height:34px;border-radius:9px;cursor:pointer;font-size:16px}
.iconbtn:hover{color:var(--text)}
.menu-bar{display:flex;gap:8px;padding:12px 18px 14px;flex-wrap:wrap;border-top:1px solid var(--line)}
.chap-list{padding:2px 12px 12px}
.chap{display:grid;grid-template-columns:1fr 150px 50px auto;gap:12px;align-items:center;padding:11px 8px;border-top:1px solid var(--line);cursor:pointer}
.chap:hover{background:var(--panel2)}
.chap-info{min-width:0}
.chap-name{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.chap-counts{margin-top:2px}
.chap-pct{text-align:right;font-weight:600}
@media(max-width:620px){
  .chap{grid-template-columns:1fr 60px}
  .chap .bar{display:none}
}

/* ---- Studiu ---- */
.study-head{display:flex;align-items:center;gap:12px;margin:8px 0 18px}
.progress{height:7px;background:var(--panel2);border-radius:999px;overflow:hidden;flex:1}
.progress>i{display:block;height:100%;background:var(--accent);width:0}
.face{min-height:150px;display:flex;align-items:center;justify-content:center;text-align:center;padding:24px;font-size:21px}
.face.answer{border-top:1px dashed var(--line);margin-top:6px;font-size:19px}
.content{max-width:100%;overflow-wrap:anywhere}
pre.code{background:#0c0e12;border:1px solid var(--line);border-radius:10px;padding:12px 14px;overflow:auto;text-align:left;font-size:13.5px;white-space:pre}
code{background:#0c0e12;border:1px solid var(--line);border-radius:6px;padding:1px 6px;font-size:.9em}
.rate{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-top:16px}
.rate button{border:none;border-radius:12px;padding:13px 8px;cursor:pointer;font-weight:700;font-size:15px;display:flex;flex-direction:column;gap:3px;align-items:center}
.rate button .iv{font-size:12px;font-weight:600;opacity:.85}
.rate .again{background:var(--again);color:#fff}
.rate .hard{background:var(--hard);color:#3a2406}
.rate .good{background:var(--good);color:#fff}
.rate .easy{background:var(--easy);color:#fff}
.rate button:hover{filter:brightness(1.08)}
.kbd{font-size:11px;opacity:.6;margin-left:4px}
.done{text-align:center;padding:46px 10px}
.done .big{font-size:48px;margin-bottom:8px}

/* ---- Capitol detaliu ---- */
.crumb{color:var(--muted);font-size:14px;margin:6px 0 2px}
.cardline{display:flex;gap:10px;align-items:center;padding:11px 0;border-bottom:1px solid var(--line);border-radius:8px}
.cardline .q{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.cardline .meta{font-size:12px;color:var(--muted);white-space:nowrap}
.cardline-chk{width:18px;height:18px;flex:none;accent-color:#e5534b;cursor:pointer;margin-left:2px}
.cardline.selected{background:rgba(229,83,75,.12);padding-left:6px;padding-right:6px}

/* ---- Subcapitole (noduri-copil în pagina capitolului) ---- */
.subnode{display:flex;align-items:center;gap:10px;padding:12px;border:1px solid var(--line);border-radius:11px;background:var(--panel);margin:8px 0;cursor:pointer}
.subnode:hover{background:var(--panel2);border-color:var(--accent)}
.subnode .sn-chev{color:var(--muted);flex:none;font-size:14px}
.subnode .sn-main{flex:1;min-width:0}
.subnode .sn-name{font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.subnode .sn-meta{font-size:12px;color:var(--muted);margin-top:1px}
.subnode .sn-study{flex:none}

/* ---- Modal ---- */
.overlay{position:fixed;inset:0;background:rgba(0,0,0,.55);display:none;align-items:center;justify-content:center;z-index:50;padding:18px}
.overlay.show{display:flex}
.modal{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:20px;width:100%;max-width:620px;max-height:90vh;overflow:auto}
.modal textarea{min-height:110px}

/* ---- Progres ---- */
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin:14px 0}
.stat{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:14px;text-align:center}
.stat .num{font-size:26px;font-weight:700}
.stat .lbl{font-size:12px;color:var(--muted);margin-top:2px}
.chart{display:flex;align-items:stretch;gap:4px;height:190px;padding:8px 0;overflow-x:auto}
.chart .col{flex:1;min-width:16px;display:flex;flex-direction:column;align-items:center}
.chart .cnt{height:14px;font-size:10px;color:var(--muted)}
.chart .barwrap{flex:1;width:100%;display:flex;align-items:flex-end;justify-content:center}
.chart .barv{width:68%;background:var(--accent);border-radius:4px 4px 0 0;min-height:3px}
.xlabels{display:flex;gap:4px;border-top:1px solid var(--line);padding-top:5px}
.xlabels span{flex:1;min-width:16px;text-align:center;font-size:9px;color:var(--muted)}
@media(max-width:520px){.stats-grid{grid-template-columns:repeat(2,1fr)}}

.hidden{display:none !important}
a{color:var(--accent)}
.toast{position:fixed;bottom:20px;left:50%;transform:translateX(-50%);background:var(--panel2);border:1px solid var(--line);color:var(--text);padding:11px 18px;border-radius:12px;opacity:0;transition:opacity .25s;pointer-events:none;z-index:100}
.toast.show{opacity:1}

/* ---- Faza 2: Tipuri card ---- */
.cloze-blank{display:inline-block;min-width:6ch;border-bottom:2px solid var(--text);vertical-align:bottom;margin:0 2px}
.cloze-ans{background:rgba(110,168,254,.18);border-radius:4px;padding:1px 5px;font-weight:600;color:var(--accent)}
.hint-area{border-top:1px dashed var(--line);padding:12px 24px;text-align:center}
.hint-text{color:var(--hard);font-size:15px;font-style:italic}
.mechanism-block{background:rgba(76,175,114,.08);border:1px solid rgba(76,175,114,.22);border-radius:10px;padding:14px;margin:10px 4px}
.mechanism-label{font-size:11px;font-weight:700;color:var(--good);text-transform:uppercase;letter-spacing:.6px;margin-bottom:6px}
.source-ref{font-size:12px;color:var(--muted);text-align:center;padding:8px 0 2px;border-top:1px solid var(--line);margin-top:10px}
.type-badge{display:inline-block;font-size:10px;font-weight:700;padding:1px 6px;border-radius:5px;margin-right:6px;vertical-align:middle;text-transform:uppercase;letter-spacing:.3px}
.type-badge.cloze{background:rgba(110,168,254,.15);color:var(--accent)}
.type-badge.mechanism{background:rgba(76,175,114,.15);color:var(--good)}
.type-badge.compare{background:rgba(216,146,59,.15);color:var(--hard)}
.modal input[type=text]{min-height:unset}

/* ---- Faza 8: Grile ---- */
.grila-item{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);margin:10px 0;overflow:hidden}
.grila-head{display:flex;align-items:flex-start;gap:10px;padding:14px 16px;cursor:pointer}
.grila-head:hover{background:var(--panel2)}
.grila-stem{flex:1;font-size:15px;line-height:1.55}
.grila-badge{font-size:11px;white-space:nowrap;padding:2px 7px;border-radius:5px;background:var(--panel2);border:1px solid var(--line);margin-left:4px;flex:none}
.test-option{display:flex;align-items:flex-start;gap:10px;background:var(--panel);border:1px solid var(--line);border-radius:11px;padding:13px 14px;margin:7px 0;cursor:pointer;transition:border-color .15s}
.test-option:hover{border-color:var(--accent)}
.test-option.selected{border-color:var(--accent);background:rgba(110,168,254,.07)}
.test-option input[type=checkbox]{accent-color:var(--accent);width:16px;height:16px;flex:none;margin-top:2px;cursor:pointer}
.test-option.correct-ans{border-color:var(--good);background:rgba(76,175,114,.08)}
.test-option.wrong-ans{border-color:var(--again);background:rgba(229,83,75,.08)}
.result-row{display:flex;justify-content:space-between;align-items:center;padding:10px 4px;border-bottom:1px solid var(--line);font-size:14px}
.result-row .pts{font-weight:700;min-width:50px;text-align:right}
.gi-grila-row{display:flex;gap:10px;align-items:flex-start;padding:10px 0;border-bottom:1px solid var(--line)}
.gi-grila-row input[type=checkbox]{margin-top:3px;flex:none;width:17px;height:17px;accent-color:var(--accent);cursor:pointer}
.gi-grila-inner{flex:1;min-width:0}
.gi-grila-inner textarea{min-height:42px;font-size:13px;margin-bottom:2px}

/* ---- Faza 7: Generare AI overlay ---- */
.genai-modal{padding:0;max-width:720px;display:flex;flex-direction:column;max-height:90vh}
.genai-header{padding:16px 20px 10px;border-bottom:1px solid var(--line);position:sticky;top:0;background:var(--panel);z-index:2;border-radius:16px 16px 0 0}
.genai-body{padding:14px 20px;overflow-y:auto;flex:1}
.genai-footer{padding:12px 20px;border-top:1px solid var(--line);display:flex;gap:10px;align-items:center;flex-wrap:wrap;position:sticky;bottom:0;background:var(--panel);border-radius:0 0 16px 16px}
.genai-node-row{padding:6px 10px;border-radius:8px;background:rgba(76,175,114,.07);border:1px solid rgba(76,175,114,.2);margin-bottom:5px;font-size:13px}
.genai-card-row{display:flex;gap:10px;align-items:flex-start;padding:10px 0;border-bottom:1px solid var(--line)}
.genai-card-row input[type=checkbox]{margin-top:4px;flex:none;width:17px;height:17px;cursor:pointer;accent-color:var(--accent)}
.genai-card-inner{flex:1;min-width:0}
.genai-card-inner textarea{min-height:48px;font-size:13px;margin-bottom:3px;line-height:1.45}

/* ---- Faza 6: Explică + Toc-map ---- */
#explain-float{background:var(--accent);color:#07203f;border:none;font-weight:700;padding:7px 12px;border-radius:10px;cursor:pointer;font-size:13px;box-shadow:0 3px 12px rgba(0,0,0,.4)}
#explain-float:hover{filter:brightness(1.1)}
.tocmap-item{display:flex;justify-content:space-between;align-items:center;padding:9px 4px;border-bottom:1px solid var(--line)}
.tocmap-item .lbl{font-weight:600}

/* ---- Faza 5: Library picker + PDF section ---- */
.lib-item{padding:10px 12px;border-radius:8px;cursor:pointer;font-size:13px;font-family:ui-monospace,Menlo,Consolas,monospace;word-break:break-all;border-bottom:1px solid var(--line)}
.lib-item:hover{background:var(--panel2)}
details summary{list-style:none}
details summary::before{content:"▸ ";font-size:11px}
details[open] summary::before{content:"▾ "}

/* ---- Faza 4: Mindmap ---- */
.mm-toolbar{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin:12px 0 10px}
.mm-layout{display:flex;gap:14px;align-items:flex-start}
.mm-panel{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:16px;width:270px;flex:none;position:sticky;top:80px}
.mm-panel .mm-card-row{display:flex;gap:8px;align-items:center;padding:8px 0;border-bottom:1px solid var(--line);font-size:13px}
.mm-panel .mm-card-row .q{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--text)}
@media(max-width:700px){
  .mm-layout{flex-direction:column;align-items:stretch}  /* stretch → wrap-ul ia lățime definită */
  /* Lățime + înălțime DEFINITE pentru zona SVG. Fără ele, „width:100%" pe SVG
     intră în dependență circulară cu containerul ne-întins: Chrome cade pe 300px,
     iar Safari iOS pe 0 → harta nu se randează deloc pe iPhone. */
  #mm-svg-wrap{width:100%;min-height:62vh}
  .mm-panel{width:100%;position:static}
}
.mm-node text{user-select:none}
.mm-selected rect{filter:drop-shadow(0 0 6px rgba(110,168,254,.55))}

/* ---- Faza 3: leech badge ---- */
.leech-badge{display:inline-block;font-size:10px;font-weight:700;padding:1px 6px;border-radius:5px;margin-right:6px;vertical-align:middle;text-transform:uppercase;letter-spacing:.3px;background:rgba(229,83,75,.15);color:var(--again)}

/* ============================================================
   Optimizări mobile (≤620px). Extind limbajul vizual existent,
   nu îl înlocuiesc: nav compact pe un rând cu derulare laterală,
   cardul de carte fără tăiere, inputuri 16px (anti-zoom iOS),
   tap targets mai generoase.
   ============================================================ */
@media(max-width:620px){
  .wrap{padding:0 14px 96px}

  /* Header: brand scurt + nav pe UN rând care se derulează lateral.
     Înainte: 9 butoane înfășurate pe 4 rânduri = ~178px sticky. */
  .bar-top{padding:9px 12px;gap:8px;flex-wrap:nowrap}
  .brand{font-size:16px;flex:none;margin-right:4px}   /* anulează margin-right:auto */
  .brand span{display:none}                            /* pe mobil rămâne „🧠 Flash" */
  nav{flex:1 1 auto;min-width:0;flex-wrap:nowrap;overflow-x:auto;gap:5px;
      -webkit-overflow-scrolling:touch;scrollbar-width:none}
  nav::-webkit-scrollbar{display:none}
  nav button{flex:none;white-space:nowrap;padding:9px 12px;font-size:14px}

  /* Cardul de carte (dashboard): butoanele trec pe rândul lor,
     ca „Învață (N)" să nu mai fie tăiat la marginea cardului. */
  .book-head{flex-wrap:wrap;gap:10px 12px}
  .book-stats{white-space:normal}
  .book-actions{flex:1 1 100%;justify-content:flex-start;margin-top:2px}
  .book-actions .btn{flex:1}        /* „Învață (N)" se întinde, ușor de atins */
  .book-actions .iconbtn{flex:none}

  /* Inputuri la 16px → iOS nu mai face zoom automat la focus.
     Selectorii egalează specificitatea regulii de bază (input[type=text])
     ca să câștige prin ordine — „input" simplu ar pierde. */
  textarea,input[type=text],input[type=number],input[type=date],select{font-size:16px}

  /* Tap targets mai mari pentru controalele mici folosite des. */
  .btn.sm{padding:8px 12px;font-size:13.5px}
  .iconbtn{width:38px;height:38px}
}