/* ============================================================
   MathMaster — dashboard.css
   Moderni EdTech vizualika • CSS kintamieji • Flexbox • Grid
   Pritaikyta:
   - dashboard.html
   - classes/*.html
   - būsimoms temų / uždavinių / pažangos sekcijoms
   ============================================================ */

/* ------------------------------------------------------------------
   `hidden` PRIVALO nugalėti `display`.
   Naršyklės taisyklė `[hidden]{display:none}` gyvena UA lentelėje, todėl
   BET KOKIA autoriaus `display` reikšmė ją nugali. Visos šios kortelės
   turi `display:flex`, tad `card.hidden = true` (dashboard.js paieška ir
   klaidų klinikos mygtukas) nieko nepaslėpdavo: įvedus nesutampančią
   frazę kortelės gaudavo `hidden`, bet likdavo ekrane – paieška atrodė
   sugedusi, o `[data-action="clinic"]` mygtukas kabėjo net be klaidų.
   `!important` būtinas todėl, kad `.topic-card` taisyklė kartojama failo
   gale – prie vienodo specifiškumo laimėtų vėlesnioji `display:flex`.
   ------------------------------------------------------------------ */
.class-card[hidden],
.topic-card[hidden],
.qa-card[hidden],
.rec-card[hidden]{ display:none !important; }

/* ============================================================
   1. KINTAMIEJI
   ============================================================ */
:root{
  /* pagrindinė spalvų sistema */
  --primary:#4F46E5;
  --primary-600:#4338CA;
  --secondary:#6366F1;
  --primary-50:#EEF2FF;

  /* paviršiai */
  --bg:#F8FAFC;
  --card:#FFFFFF;
  --surface-2:#F1F5F9;
  --track:#EEF1F8;

  /* tekstas */
  --text:#0F172A;
  --text-2:#475569;
  --muted:#64748B;

  /* rėmeliai */
  --border:#E6EAF2;
  --border-soft:#EEF1F7;

  /* topbar / fonas */
  --topbar-bg:rgba(248,250,252,.82);
  --math-ink:rgba(15,23,42,.05);
  --grid-line:rgba(79,70,229,.05);
  --grid-line-major:rgba(79,70,229,.10);

  /* akcentai */
  --green:#10B981;
  --blue:#3B82F6;
  --purple:#8B5CF6;
  --orange:#F59E0B;
  --red:#EF4444;
  --slate:#334155;
  --teal:#14B8A6;
  --rose:#F43F5E;
  --violet:#7C3AED;
  --amber:#F59E0B;

  /* šešėliai */
  --shadow-sm:0 1px 2px rgba(15,23,42,.06), 0 1px 3px rgba(15,23,42,.04);
  --shadow-md:0 6px 16px rgba(15,23,42,.06), 0 2px 6px rgba(15,23,42,.04);
  --shadow-lg:0 16px 34px rgba(15,23,42,.10), 0 6px 14px rgba(15,23,42,.06);
  --shadow-primary:0 12px 26px rgba(79,70,229,.32);

  /* forma / dydžiai */
  --r-sm:10px;
  --r:16px;
  --r-lg:22px;
  --sidebar-w:264px;
  --rail-w:340px;

  --ease:.25s cubic-bezier(.4,0,.2,1);
}

/* ============================================================
   2. TAMSUS REŽIMAS
   Įjungimas: <html data-theme="dark">
   ============================================================ */
:root[data-theme="dark"]{
  --bg:#0B1120;
  --card:#131C2E;
  --surface-2:#1B2638;
  --track:#1B2638;
  --text:#E8EDF6;
  --text-2:#AEB9CC;
  --muted:#8593A8;
  --border:#23304A;
  --border-soft:#1C2740;
  --primary-50:rgba(99,102,241,.16);
  --topbar-bg:rgba(11,17,32,.82);
  --math-ink:rgba(226,232,240,.055);
  --grid-line:rgba(129,140,248,.07);
  --grid-line-major:rgba(129,140,248,.13);
  --shadow-sm:0 1px 2px rgba(0,0,0,.45);
  --shadow-md:0 6px 16px rgba(0,0,0,.5);
  --shadow-lg:0 16px 34px rgba(0,0,0,.6);
}

/* ============================================================
   3. RESET & BASE
   ============================================================ */
*{ box-sizing:border-box; margin:0; padding:0; }
html,body{ height:100%; }

body{
  font-family:'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.5;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

a{ color:inherit; text-decoration:none; }
button{
  font-family:inherit;
  cursor:pointer;
  border:none;
  background:none;
  color:inherit;
}
img{ display:block; max-width:100%; }
h1,h2,h3,h4{ line-height:1.2; }

*::-webkit-scrollbar{ width:10px; height:10px; }
*::-webkit-scrollbar-thumb{
  background:#D7DEEA;
  border-radius:20px;
  border:3px solid var(--bg);
}
*::-webkit-scrollbar-thumb:hover{ background:#C4CDDD; }

:focus-visible{
  outline:2px solid var(--primary);
  outline-offset:2px;
  border-radius:6px;
}

/* ============================================================
   4. MATEMATINIS FONAS
   ============================================================ */
.math-bg{
  position:fixed;
  inset:0;
  z-index:0;
  overflow:hidden;
  pointer-events:none;
  background-image:
    linear-gradient(var(--grid-line-major) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line-major) 1px, transparent 1px),
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size:170px 170px, 170px 170px, 34px 34px, 34px 34px;
}

.math-bg .ms{
  position:absolute;
  font-weight:700;
  color:var(--math-ink);
  user-select:none;
  line-height:1;
}

.math-bg .ms:nth-of-type(1){ top:11%; left:31%; font-size:66px; }
.math-bg .ms:nth-of-type(2){ top:24%; left:80%; font-size:48px; }
.math-bg .ms:nth-of-type(3){ top:62%; left:14%; font-size:58px; }
.math-bg .ms:nth-of-type(4){ top:78%; left:60%; font-size:70px; }
.math-bg .ms:nth-of-type(5){ top:8%;  left:62%; font-size:44px; }
.math-bg .ms:nth-of-type(6){ top:46%; left:90%; font-size:52px; }
.math-bg .ms:nth-of-type(7){ top:88%; left:30%; font-size:40px; }
.math-bg .ms:nth-of-type(8){ top:38%; left:44%; font-size:38px; }
.math-bg .ms:nth-of-type(9){ top:18%; left:8%;  font-size:46px; }
.math-bg .ms:nth-of-type(10){ top:70%; left:82%; font-size:50px; }
.math-bg .ms:nth-of-type(11){ top:54%; left:55%; font-size:42px; }
.math-bg .ms:nth-of-type(12){ top:30%; left:20%; font-size:40px; }

.math-axes{
  position:absolute;
  right:3%;
  bottom:5%;
  width:260px;
  height:260px;
  color:var(--math-ink);
}

/* ============================================================
   5. APP KARKASAS
   ============================================================ */
.app{
  position:relative;
  z-index:1;
  display:grid;
  grid-template-columns:var(--sidebar-w) 1fr;
  min-height:100vh;
}

/* ============================================================
   6. SIDEBAR
   ============================================================ */
.sidebar{
  position:sticky;
  top:0;
  height:100vh;
  display:flex;
  flex-direction:column;
  gap:8px;
  padding:22px 16px;
  background:var(--card);
  border-right:1px solid var(--border);
  overflow-y:auto;
}

.brand{
  display:flex;
  align-items:center;
  gap:12px;
  padding:6px 8px 16px;
}

.brand-logo{
  flex:0 0 auto;
  line-height:0;
  filter:drop-shadow(0 6px 12px rgba(79,70,229,.28));
}

.brand-text{
  display:flex;
  flex-direction:column;
  min-width:0;
}

.brand-name{
  font-weight:800;
  font-size:1.15rem;
  letter-spacing:-.02em;
}

.brand-tag{
  font-size:.72rem;
  color:var(--muted);
  font-weight:500;
}

.nav{
  display:flex;
  flex-direction:column;
  gap:4px;
}

.nav-link{
  display:flex;
  align-items:center;
  gap:12px;
  padding:10px 12px;
  border-radius:var(--r-sm);
  color:var(--text-2);
  font-size:.9rem;
  font-weight:600;
  transition:background var(--ease), color var(--ease), transform var(--ease), box-shadow var(--ease);
}

.nav-ic{
  font-size:1.05rem;
  width:22px;
  text-align:center;
  flex:0 0 auto;
}

.nav-link:hover{
  background:var(--surface-2);
  color:var(--text);
  transform:translateX(1px);
}

.nav-link:hover .nav-ic{
  transform:scale(1.08);
}

.nav-link.active{
  background:var(--primary-50);
  color:var(--primary-600);
  box-shadow:inset 0 0 0 1px rgba(79,70,229,.12);
}

.nav-section{
  display:flex;
  flex-direction:column;
  gap:4px;
  margin-top:14px;
}

.nav-section-title{
  font-size:.68rem;
  font-weight:700;
  letter-spacing:.09em;
  text-transform:uppercase;
  color:var(--muted);
  padding:4px 12px;
}

.premium-card{
  margin-top:auto;
  display:flex;
  flex-direction:column;
  gap:8px;
  padding:18px;
  border-radius:var(--r);
  color:#fff;
  background:linear-gradient(150deg, #4F46E5, #6366F1 60%, #818CF8);
  box-shadow:var(--shadow-primary);
  position:relative;
  overflow:hidden;
}

.premium-card::after{
  content:"";
  position:absolute;
  right:-26px;
  top:-26px;
  width:96px;
  height:96px;
  border-radius:50%;
  background:rgba(255,255,255,.16);
}

.premium-ic{ font-size:1.3rem; }
.premium-title{ font-weight:800; font-size:1rem; }
.premium-text{
  font-size:.76rem;
  line-height:1.45;
  color:rgba(255,255,255,.88);
}

.premium-btn{
  margin-top:4px;
  padding:9px 12px;
  border-radius:10px;
  background:#fff;
  color:var(--primary-600);
  font-weight:700;
  font-size:.82rem;
  transition:transform var(--ease), box-shadow var(--ease), background var(--ease);
}

.premium-btn:hover{
  transform:translateY(-2px);
  box-shadow:0 8px 18px rgba(0,0,0,.18);
}

/* ============================================================
   7. MAIN + TOPBAR
   ============================================================ */
.main{
  min-width:0;
  display:flex;
  flex-direction:column;
}

.topbar{
  position:sticky;
  top:0;
  z-index:30;
  display:flex;
  align-items:center;
  gap:18px;
  padding:14px 28px;
  background:var(--topbar-bg);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid var(--border);
}

.search{
  position:relative;
  flex:1;
  max-width:440px;
  display:flex;
  align-items:center;
  gap:10px;
  padding:10px 16px;
  background:var(--card);
  border:1px solid var(--border);
  border-radius:12px;
  transition:border-color var(--ease), box-shadow var(--ease), transform var(--ease);
}

.search:focus-within{
  border-color:var(--secondary);
  box-shadow:0 0 0 4px rgba(99,102,241,.12);
}

.search-ic{
  color:var(--muted);
  line-height:0;
  flex:0 0 auto;
}

.search input{
  border:none;
  outline:none;
  width:100%;
  font-size:.9rem;
  color:var(--text);
  background:transparent;
}

.search input::placeholder{
  color:var(--muted);
}

/* Paieskos "isskleidziamas" meniu: rodo temas, kurios atitinka jau
   surasyta uzklausa (pagal pavadinima ARBA raktazodzius), tiesiai po
   lauku - nereikia slinkti zemyn iki visos temu lenteles. */
.search-suggest{
  position:absolute;
  top:calc(100% + 8px);
  left:0;
  right:0;
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--r);
  box-shadow:var(--shadow-lg);
  padding:6px;
  max-height:360px;
  overflow-y:auto;
  z-index:60;
}

.search-suggest[hidden]{
  display:none;
}

.search-suggest-item{
  display:flex;
  align-items:center;
  gap:10px;
  padding:8px 10px;
  border-radius:var(--r-sm);
  text-decoration:none;
  color:var(--text);
  cursor:pointer;
}

.search-suggest-item:hover,
.search-suggest-item.is-active{
  background:var(--surface-2);
}

.search-suggest-body{
  min-width:0;
  flex:1;
}

.search-suggest-name{
  font-size:.88rem;
  font-weight:600;
  line-height:1.3;
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}

.search-suggest-meta{
  font-size:.75rem;
  color:var(--muted);
}

.search-suggest-empty{
  padding:16px 10px;
  text-align:center;
  font-size:.85rem;
  color:var(--muted);
}

.topbar-right{
  margin-left:auto;
  display:flex;
  align-items:center;
  gap:16px;
}

.icon-btn{
  position:relative;
  width:42px;
  height:42px;
  display:grid;
  place-items:center;
  background:var(--card);
  border:1px solid var(--border);
  border-radius:12px;
  font-size:1.05rem;
  transition:background var(--ease), transform var(--ease), border-color var(--ease), box-shadow var(--ease);
}

.icon-btn:hover{
  background:var(--surface-2);
  transform:translateY(-1px);
  border-color:#D7DEEA;
}

.icon-btn .dot{
  position:absolute;
  top:9px;
  right:10px;
  width:8px;
  height:8px;
  border-radius:50%;
  background:var(--red);
  border:2px solid var(--card);
}

.user{
  display:flex;
  align-items:center;
  gap:11px;
}

.avatar{
  width:42px;
  height:42px;
  border-radius:12px;
  display:grid;
  place-items:center;
  font-weight:800;
  color:#fff;
  background:linear-gradient(140deg, #4F46E5, #818CF8);
  box-shadow:var(--shadow-sm);
}

.user-meta{
  display:flex;
  flex-direction:column;
  line-height:1.25;
}

.user-name{
  font-weight:700;
  font-size:.9rem;
}

.user-class{
  font-size:.74rem;
  color:var(--muted);
}

.content{
  padding:28px;
  display:flex;
  flex-direction:column;
  gap:26px;
}

/* ============================================================
   8. HERO
   ============================================================ */
.hero{
  position:relative;
  overflow:hidden;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
  padding:38px 40px;
  border-radius:var(--r-lg);
  color:#fff;
  background:linear-gradient(125deg, #4338CA 0%, #4F46E5 45%, #6366F1 100%);
  box-shadow:var(--shadow-primary);
}

.blob{
  position:absolute;
  border-radius:50%;
  filter:blur(46px);
  z-index:1;
  pointer-events:none;
}

.blob-a{
  width:240px;
  height:240px;
  top:-90px;
  right:120px;
  background:rgba(255,255,255,.18);
}

.blob-b{
  width:200px;
  height:200px;
  bottom:-100px;
  left:-40px;
  background:rgba(129,140,248,.55);
}

.hero-sym{
  position:absolute;
  z-index:1;
  pointer-events:none;
  user-select:none;
  color:rgba(255,255,255,.13);
  font-weight:700;
  animation:floaty 6s ease-in-out infinite;
}

.hs-1{ font-size:72px; top:6%; right:34%; }
.hs-2{ font-size:50px; bottom:12%; right:7%; animation-delay:-2s; }
.hs-3{ font-size:46px; top:50%; right:22%; animation-delay:-3.6s; }

.hero-ring{
  position:absolute;
  z-index:1;
  pointer-events:none;
  width:120px;
  height:120px;
  border-radius:50%;
  border:1.5px dashed rgba(255,255,255,.22);
  top:-26px;
  right:46%;
  animation:floaty 7.5s ease-in-out infinite;
  animation-delay:-1s;
}

.hero-tri{
  position:absolute;
  z-index:1;
  pointer-events:none;
  width:58px;
  height:58px;
  bottom:18%;
  right:40%;
  animation:floaty 8s ease-in-out infinite;
  animation-delay:-4s;
}

.hero-left{
  position:relative;
  z-index:2;
  max-width:440px;
}

.hero-badge{
  display:inline-block;
  padding:6px 12px;
  border-radius:999px;
  background:rgba(255,255,255,.16);
  border:1px solid rgba(255,255,255,.22);
  font-size:.74rem;
  font-weight:600;
  margin-bottom:16px;
}

.hero-left h1{
  font-size:2.1rem;
  font-weight:800;
  letter-spacing:-.025em;
  margin-bottom:10px;
}

.hero-left p{
  font-size:1rem;
  color:rgba(255,255,255,.9);
  margin-bottom:24px;
  max-width:380px;
}

.hero-actions{
  display:flex;
  gap:12px;
  flex-wrap:wrap;
}

.btn{
  padding:12px 22px;
  border-radius:12px;
  font-weight:700;
  font-size:.9rem;
  transition:transform var(--ease), box-shadow var(--ease), background var(--ease), border-color var(--ease);
}

.btn-light{
  background:#fff;
  color:var(--primary-600);
  box-shadow:0 8px 18px rgba(0,0,0,.16);
}

.btn-light:hover{
  transform:translateY(-2px);
  box-shadow:0 12px 24px rgba(0,0,0,.22);
}

.btn-ghost{
  background:rgba(255,255,255,.12);
  color:#fff;
  border:1px solid rgba(255,255,255,.35);
}

.btn-ghost:hover{
  background:rgba(255,255,255,.22);
  transform:translateY(-2px);
}

.hero-illustration{
  position:relative;
  z-index:2;
  flex:0 0 auto;
}

.graph-panel{
  position:relative;
  width:360px;
  padding:14px;
  background:rgba(255,255,255,.96);
  border-radius:var(--r);
  box-shadow:0 18px 40px rgba(8,11,40,.28);
}

.graph-svg{
  width:100%;
  height:auto;
  display:block;
}

.graph-svg .ax{
  font-size:13px;
  font-weight:700;
  fill:#64748B;
  font-style:italic;
}

.graph-svg .ax-0{
  font-size:12px;
  font-weight:600;
  fill:#94A3B8;
}

.graph-svg .vec{
  font-size:14px;
  font-weight:800;
  fill:#F43F5E;
  font-style:italic;
}

.chip{
  position:absolute;
  padding:5px 11px;
  border-radius:9px;
  background:#fff;
  color:var(--primary-600);
  font-size:.8rem;
  font-weight:700;
  box-shadow:var(--shadow-md);
  border:1px solid var(--border-soft);
  animation:floaty 5s ease-in-out infinite;
}

.chip-1{ top:6px; left:-14px; }
.chip-2{ bottom:24px; right:-18px; color:var(--rose); animation-delay:-1.6s; }
.chip-3{ bottom:-12px; left:34px; color:var(--violet); animation-delay:-3.1s; }

/* ============================================================
   9. BLOCKS + GRID
   ============================================================ */
.block{
  display:flex;
  flex-direction:column;
  gap:16px;
}

.block-head{
  display:flex;
  align-items:center;
  justify-content:space-between;
}

.block-head h2{
  font-size:1.2rem;
  font-weight:800;
  letter-spacing:-.02em;
}

.link-more{
  font-size:.84rem;
  font-weight:600;
  color:var(--primary-600);
  transition:opacity var(--ease), transform var(--ease);
}

.link-more:hover{
  opacity:.7;
  transform:translateX(2px);
}

.content-grid{
  display:grid;
  grid-template-columns:1fr var(--rail-w);
  gap:24px;
  align-items:start;
}

.content-col{
  display:flex;
  flex-direction:column;
  gap:26px;
  min-width:0;
}

/* ============================================================
   10. BENDRAS HOVER / KORTELIŲ ELGESYS
   ============================================================ */
.class-card,
.topic-card,
.qa-card,
.rec-card{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--r);
  box-shadow:var(--shadow-sm);
  transition:transform var(--ease), box-shadow var(--ease), border-color var(--ease), background var(--ease);
}

.class-card:hover,
.topic-card:hover,
.qa-card:hover,
.rec-card:hover{
  transform:translateY(-6px);
  box-shadow:var(--shadow-lg);
}

/* ============================================================
   11. KLASĖS
   ============================================================ */
.classes-grid{
  display:grid;
  grid-template-columns:repeat(auto-fill, minmax(200px, 1fr));
  gap:18px;
}

.class-card{
  position:relative;
  overflow:hidden;
  cursor:pointer;
  display:flex;
  align-items:center;
  gap:16px;
  padding:18px;
}

.class-card::before{
  content:"";
  position:absolute;
  left:0;
  top:0;
  bottom:0;
  width:4px;
  background:var(--accent);
  opacity:.85;
}

.class-bp{
  flex:0 0 auto;
  width:84px;
  height:84px;
  display:grid;
  place-items:center;
  border-radius:18px;
  background:color-mix(in srgb, var(--accent) 12%, var(--card));
  transition:transform var(--ease), background var(--ease);
}

.class-bp img{
  width:72px;
  height:72px;
  object-fit:contain;
}

.class-info{
  display:flex;
  flex-direction:column;
  min-width:0;
}

.class-info h3{
  font-size:1rem;
  font-weight:700;
}

.class-info span{
  font-size:.76rem;
  color:var(--muted);
}

.class-arrow{
  margin-left:auto;
  color:var(--accent);
  font-weight:700;
  opacity:0;
  transform:translateX(-6px);
  transition:opacity var(--ease), transform var(--ease);
}

.class-card:hover{
  border-color:color-mix(in srgb, var(--accent) 38%, var(--border));
}

.class-card:hover .class-bp{
  transform:scale(1.08) rotate(-6deg);
}

.class-card:hover .class-arrow{
  opacity:1;
  transform:translateX(0);
}

/* ============================================================
   12. TEMOS
   ============================================================ */
.topics-grid{
  display:grid;
  grid-template-columns:repeat(auto-fill, minmax(228px, 1fr));
  gap:18px;
}

.topic-card{
  position:relative;
  overflow:hidden;
  cursor:pointer;
  display:flex;
  flex-direction:column;
  gap:10px;
  padding:22px;
}

.topic-card::before{
  content:"";
  position:absolute;
  inset:0;
  border-radius:inherit;
  opacity:0;
  background:radial-gradient(120% 80% at 100% 0%, color-mix(in srgb, var(--accent) 16%, transparent), transparent 60%);
  transition:opacity var(--ease);
  pointer-events:none;
}

.topic-card:hover::before{
  opacity:1;
}

.topic-ic{
  position:relative;
  width:56px;
  height:56px;
  display:grid;
  place-items:center;
  border-radius:16px;
  color:var(--accent);
  margin-bottom:4px;
  background:linear-gradient(135deg,
    color-mix(in srgb, var(--accent) 18%, var(--card)),
    color-mix(in srgb, var(--accent) 6%, var(--card)));
  transition:transform var(--ease), background var(--ease), color var(--ease);
}

.topic-ic svg{
  width:34px;
  height:34px;
}

.topic-card h3{
  position:relative;
  font-size:1.02rem;
  font-weight:700;
}

.topic-card p{
  position:relative;
  font-size:.82rem;
  color:var(--muted);
  line-height:1.45;
}

.topic-go{
  position:absolute;
  right:18px;
  bottom:18px;
  width:34px;
  height:34px;
  display:grid;
  place-items:center;
  border-radius:10px;
  font-weight:700;
  color:var(--accent);
  background:color-mix(in srgb, var(--accent) 12%, var(--card));
  transition:transform var(--ease), background var(--ease), color var(--ease);
}

.topic-card:hover{
  border-color:color-mix(in srgb, var(--accent) 36%, var(--border));
}

.topic-card:hover .topic-ic{
  background:linear-gradient(135deg, var(--accent), color-mix(in srgb, var(--accent) 60%, #000));
  color:#fff;
  transform:scale(1.08) rotate(-4deg);
}

.topic-card:hover .topic-go{
  background:var(--accent);
  color:#fff;
  transform:translateX(3px);
}

/* ============================================================
   13. GREITI VEIKSMAI
   ============================================================ */
.qa-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit, minmax(222px, 1fr));
  gap:16px;
}

.qa-card{
  position:relative;
  overflow:hidden;
  text-align:left;
  display:flex;
  align-items:center;
  gap:14px;
  padding:18px;
}

.qa-card::before{
  content:"";
  position:absolute;
  left:0;
  right:0;
  top:0;
  height:3px;
  background:linear-gradient(90deg, var(--primary), var(--secondary));
  transform:scaleX(0);
  transform-origin:left;
  transition:transform var(--ease);
}

.qa-card:hover::before{
  transform:scaleX(1);
}

.qa-ic{
  flex:0 0 auto;
  width:46px;
  height:46px;
  display:grid;
  place-items:center;
  border-radius:13px;
  font-size:1.3rem;
  background:var(--primary-50);
}

.qa-text{
  display:flex;
  flex-direction:column;
  min-width:0;
}

.qa-text strong{
  font-size:.92rem;
  font-weight:700;
}

.qa-text span{
  font-size:.74rem;
  color:var(--muted);
}

.qa-arrow{
  margin-left:auto;
  color:var(--muted);
  font-weight:700;
  transition:transform var(--ease), color var(--ease);
}

.qa-card:hover .qa-arrow{
  color:var(--primary-600);
  transform:translateX(3px);
}

/* ============================================================
   14. REKOMENDUOJAMA TAU
   ============================================================ */
.rec-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit, minmax(220px, 1fr));
  gap:18px;
}

.rec-card{
  display:flex;
  flex-direction:column;
  gap:14px;
  padding:18px;
  cursor:pointer;
}

.rec-ic{
  width:100%;
  height:96px;
  border-radius:14px;
  display:grid;
  place-items:center;
  color:#fff;
  background:linear-gradient(135deg, var(--accent), color-mix(in srgb, var(--accent) 55%, #000));
  box-shadow:inset 0 -18px 40px rgba(0,0,0,.12);
}

.rec-ic svg{
  width:48px;
  height:48px;
}

.rec-body{
  display:flex;
  flex-direction:column;
  gap:4px;
}

.rec-body h3{
  font-size:1rem;
  font-weight:700;
}

.rec-body p{
  font-size:.8rem;
  color:var(--muted);
  line-height:1.4;
}

.rec-cta{
  margin-top:4px;
  font-size:.82rem;
  font-weight:700;
  color:var(--accent);
  transition:transform var(--ease);
  display:inline-block;
}

.rec-card:hover{
  border-color:color-mix(in srgb, var(--accent) 34%, var(--border));
}

.rec-card:hover .rec-cta{
  transform:translateX(3px);
}

/* ============================================================
   15. DEŠINĖ JUOSTA + KORTELĖS
   ============================================================ */
.rail{
  display:flex;
  flex-direction:column;
  gap:22px;
}

.card{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--r);
  box-shadow:var(--shadow-sm);
  padding:22px;
}

.card-title{
  font-size:1.02rem;
  font-weight:800;
  letter-spacing:-.01em;
}

/* PAŽANGA */
.progress-card{
  display:flex;
  flex-direction:column;
  gap:18px;
}

.ring-wrap{
  position:relative;
  display:grid;
  place-items:center;
}

.ring-wrap::before{
  content:"";
  position:absolute;
  width:210px;
  height:210px;
  border-radius:50%;
  background:radial-gradient(circle, rgba(79,70,229,.18), transparent 62%);
  filter:blur(4px);
  pointer-events:none;
}

.ring{
  position:relative;
  width:196px;
  height:196px;
}

.progress-arc{
  filter:drop-shadow(0 2px 7px rgba(79,70,229,.5));
  animation:ringLoad 1.4s cubic-bezier(.4,0,.2,1) forwards;
  transform-origin:60px 60px;
}

.ring-val{
  font-size:26px;
  font-weight:800;
  fill:var(--text);
}

.ring-sub{
  font-size:11px;
  font-weight:600;
  fill:var(--muted);
  letter-spacing:.04em;
}

.stats-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:12px;
}

.stat{
  display:flex;
  flex-direction:column;
  gap:3px;
  padding:14px;
  background:var(--surface-2);
  border-radius:var(--r-sm);
}

.stat-val{
  font-size:1.25rem;
  font-weight:800;
  letter-spacing:-.02em;
}

.stat-lbl{
  font-size:.72rem;
  color:var(--muted);
  line-height:1.3;
}

/* TIKSLAS */
.goal-card{
  display:flex;
  flex-direction:column;
  gap:12px;
}

.goal-head{
  display:flex;
  align-items:center;
  gap:10px;
}

.goal-ic{
  flex:0 0 auto;
  width:34px;
  height:34px;
  display:grid;
  place-items:center;
  border-radius:10px;
  font-size:1rem;
  background:var(--primary-50);
}

.goal-text{
  font-size:.88rem;
  color:var(--text-2);
}

.bar{
  height:10px;
  border-radius:999px;
  background:var(--surface-2);
  overflow:hidden;
}

.bar span{
  display:block;
  height:100%;
  border-radius:999px;
  background:linear-gradient(90deg, var(--primary), var(--secondary));
  transition:width .6s cubic-bezier(.4,0,.2,1);
}

.goal-meta{
  display:flex;
  justify-content:space-between;
  font-size:.78rem;
}

.goal-meta span:first-child{
  color:var(--muted);
}

.goal-meta span:last-child{
  font-weight:700;
  color:var(--primary-600);
}

/* PASIEKIMAI */
.ach-card{
  display:flex;
  flex-direction:column;
  gap:16px;
}

.ach-list{
  list-style:none;
  display:flex;
  flex-direction:column;
  gap:12px;
}

.ach-list li{
  display:flex;
  align-items:center;
  gap:12px;
}

.ach-badge{
  flex:0 0 auto;
  width:42px;
  height:42px;
  display:grid;
  place-items:center;
  border-radius:12px;
  font-size:1.15rem;
}

.badge-amber{ background:#FEF3C7; }
.badge-rose{ background:#FFE4E6; }
.badge-teal{ background:#CCFBF1; }
/* Tamsiame režime šie šviesūs pasteliniai fonai atrodytų kaip ryški dėmė
   ant tamsaus puslapio – pritemdyti iki permatomo atspalvio. */
:root[data-theme="dark"] .badge-amber{ background:rgba(245,158,11,.20); }
:root[data-theme="dark"] .badge-rose{ background:rgba(244,63,94,.20); }
:root[data-theme="dark"] .badge-teal{ background:rgba(20,184,166,.20); }

.ach-list h4{
  font-size:.88rem;
  font-weight:700;
}

.ach-list div span{
  font-size:.74rem;
  color:var(--muted);
  line-height:1.35;
}

/* ============================================================
   16. IS-SELECTED
   ============================================================ */
.class-card.is-selected,
.topic-card.is-selected,
.rec-card.is-selected{
  border-color:color-mix(in srgb, var(--accent, var(--primary)) 55%, var(--border));
  box-shadow:
    0 0 0 2px color-mix(in srgb, var(--accent, var(--primary)) 22%, transparent),
    var(--shadow-md);
  transform:translateY(-2px);
}

.class-card.is-selected{
  background:color-mix(in srgb, var(--accent, var(--primary)) 5%, var(--card));
}

.class-card.is-selected .class-arrow{
  opacity:1;
  transform:translateX(0);
}

.class-card.is-selected .class-bp{
  transform:scale(1.06) rotate(-4deg);
}

.topic-card.is-selected{
  background:color-mix(in srgb, var(--accent, var(--primary)) 4%, var(--card));
}

.topic-card.is-selected .topic-ic{
  background:linear-gradient(
    135deg,
    var(--accent, var(--primary)),
    color-mix(in srgb, var(--accent, var(--primary)) 60%, #000)
  );
  color:#fff;
  transform:scale(1.06) rotate(-3deg);
}

.topic-card.is-selected .topic-go{
  background:var(--accent, var(--primary));
  color:#fff;
  transform:translateX(3px);
}

.topic-card.is-selected::before{
  opacity:1;
}

.topic-card.is-selected h3,
.rec-card.is-selected h3{
  color:var(--accent, var(--primary));
}

.rec-card.is-selected{
  background:color-mix(in srgb, var(--accent, var(--primary)) 4%, var(--card));
}

.rec-card.is-selected .rec-cta{
  transform:translateX(4px);
}

:root[data-theme="dark"] .class-card.is-selected,
:root[data-theme="dark"] .topic-card.is-selected,
:root[data-theme="dark"] .rec-card.is-selected{
  box-shadow:
    0 0 0 2px color-mix(in srgb, var(--accent, var(--primary)) 30%, transparent),
    var(--shadow-lg);
}

/* ============================================================
   17. KLASIŲ PUSLAPIAI
   ============================================================ */
.class-page{
  position:relative;
  z-index:1;
  max-width:1080px;
  margin:0 auto;
  padding:28px;
  display:flex;
  flex-direction:column;
  gap:26px;
}

.cp-topbar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
}

.cp-back{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:9px 15px;
  border-radius:12px;
  font-weight:600;
  font-size:.88rem;
  color:var(--text-2);
  background:var(--card);
  border:1px solid var(--border);
  box-shadow:var(--shadow-sm);
  transition:transform var(--ease), border-color var(--ease), color var(--ease), background var(--ease);
}

.cp-back:hover{
  transform:translateX(-3px);
  color:var(--primary-600);
  border-color:#D7DEEA;
}

.cp-brand{
  display:flex;
  align-items:center;
  gap:10px;
  font-weight:800;
  letter-spacing:-.02em;
}

.cp-brand .brand-logo{
  line-height:0;
}

.class-hero{
  position:relative;
  overflow:hidden;
  display:flex;
  align-items:center;
  gap:28px;
  padding:32px;
  border-radius:var(--r-lg);
  color:#fff;
  background:linear-gradient(135deg,
    color-mix(in srgb, var(--accent) 90%, #fff),
    color-mix(in srgb, var(--accent) 64%, #000));
  box-shadow:var(--shadow-lg);
}

.class-hero::after{
  content:"";
  position:absolute;
  right:-40px;
  top:-40px;
  width:160px;
  height:160px;
  border-radius:50%;
  background:rgba(255,255,255,.14);
}

.ch-bp{
  flex:0 0 auto;
  width:120px;
  height:120px;
  border-radius:24px;
  display:grid;
  place-items:center;
  background:rgba(255,255,255,.16);
  backdrop-filter:blur(2px);
}

.ch-bp img{
  width:96px;
  height:96px;
  object-fit:contain;
}

.ch-info{
  position:relative;
  z-index:1;
}

.ch-eyebrow{
  font-size:.72rem;
  font-weight:700;
  letter-spacing:.12em;
  text-transform:uppercase;
  opacity:.85;
}

.ch-info h1{
  font-size:2rem;
  font-weight:800;
  letter-spacing:-.02em;
  margin:4px 0 6px;
}

.ch-info p{
  font-size:.95rem;
  color:rgba(255,255,255,.92);
  max-width:420px;
}

.ch-meta{
  display:flex;
  gap:10px;
  margin-top:14px;
  flex-wrap:wrap;
}

.ch-tag{
  padding:6px 12px;
  border-radius:999px;
  background:rgba(255,255,255,.18);
  border:1px solid rgba(255,255,255,.26);
  font-size:.76rem;
  font-weight:600;
}

/* ============================================================
   18. ANIMACIJOS
   ============================================================ */
@keyframes floaty{
  0%,100%{ transform:translateY(0); }
  50%{ transform:translateY(-8px); }
}

@keyframes ringLoad{
  from{ stroke-dashoffset:326.73; }
  to{ stroke-dashoffset:91.48; }
}

/* ============================================================
   19. RESPONSIVE
   ============================================================ */

/* Laptop */
@media (max-width:1180px){
  .content-grid{
    grid-template-columns:1fr;
  }

  .rail{
    display:grid;
    grid-template-columns:repeat(2, 1fr);
    gap:22px;
    align-items:start;
  }

  .ach-card{
    grid-column:1 / -1;
  }
}

/* Tablet */
@media (max-width:1024px){
  :root{ --sidebar-w:84px; }

  .sidebar{
    padding:18px 10px;
    align-items:center;
  }

  .brand{
    justify-content:center;
    padding:6px 0 14px;
  }

  .brand-text,
  .nav-section-title,
  .nav-link .label,
  .premium-card{
    display:none;
  }

  .nav{
    width:100%;
  }

  .nav-link{
    justify-content:center;
    padding:12px 0;
  }

  .nav-ic{
    width:auto;
  }
}

/* Hero stack */
@media (max-width:920px){
  .hero{
    flex-direction:column;
    align-items:flex-start;
    padding:30px;
  }

  .hero-illustration{
    width:100%;
  }

  .graph-panel{
    width:100%;
    max-width:380px;
  }

  .hero-left h1{
    font-size:1.8rem;
  }

  .hero-sym,
  .hero-ring,
  .hero-tri{
    display:none;
  }

  .class-hero{
    flex-direction:column;
    text-align:center;
  }

  .ch-meta{
    justify-content:center;
  }
}

/* Mobile */
@media (max-width:760px){
  .topbar{
    padding:12px 16px;
    gap:12px;
  }

  .user-meta{
    display:none;
  }

  .content{
    padding:18px 16px 30px;
  }

  .class-page{
    padding:18px 16px 30px;
  }

  .rail{
    grid-template-columns:1fr;
  }

  .ach-card{
    grid-column:auto;
  }

  .stats-grid{
    grid-template-columns:1fr 1fr;
  }
}

/* Small phones */
@media (max-width:420px){
  .hero-left h1{
    font-size:1.55rem;
  }

  .hero-actions{
    width:100%;
  }

  .btn{
    flex:1;
    text-align:center;
  }

  .classes-grid{
    grid-template-columns:1fr 1fr;
  }

  .ch-bp{
    width:96px;
    height:96px;
  }

  .ch-bp img{
    width:76px;
    height:76px;
  }

  .stats-grid{
    grid-template-columns:1fr;
  }
}

/* ============================================================
   20. REDUCED MOTION
   ============================================================ */
@media (prefers-reduced-motion:reduce){
  *{
    animation:none !important;
    transition:none !important;
    scroll-behavior:auto !important;
  }
}

/* ---------------- Prognozuojamas VBE/PUPP balas (gyvas skydelis) ---------------- */
.predict-widget{
  display:flex; align-items:center; gap:14px; margin:0 0 22px; padding:14px 20px;
  border-radius:var(--r-lg); border:1.5px solid color-mix(in srgb, var(--primary) 30%, var(--border));
  background:linear-gradient(120deg,
    color-mix(in srgb, var(--primary) 10%, var(--card)),
    color-mix(in srgb, var(--secondary) 6%, var(--card)));
  box-shadow:0 0 0 1px color-mix(in srgb, var(--primary) 10%, transparent) inset,
    0 8px 24px color-mix(in srgb, var(--primary) 16%, transparent);
  animation:predict-glow 3.2s ease-in-out infinite;
}
.predict-widget[hidden]{ display:none; }
.predict-icon{ font-size:1.6rem; line-height:1; flex-shrink:0; }
.predict-body{ display:flex; flex-direction:column; gap:2px; min-width:0; }
.predict-score{ font-size:1.02rem; font-weight:800; color:var(--text); }
.predict-tip{ font-size:.86rem; color:var(--text-2); }
.predict-cta{
  margin-left:auto; flex-shrink:0; white-space:nowrap; text-decoration:none;
  font-weight:700; font-size:.86rem; color:#fff; padding:8px 16px; border-radius:999px;
  background:linear-gradient(135deg, var(--primary), var(--secondary));
  box-shadow:var(--shadow-primary); transition:transform var(--ease);
}
.predict-cta:hover{ transform:translateY(-1px); }
.predict-cta[hidden]{ display:none; }
@keyframes predict-glow{
  0%, 100%{ box-shadow:0 0 0 1px color-mix(in srgb, var(--primary) 10%, transparent) inset,
    0 8px 24px color-mix(in srgb, var(--primary) 16%, transparent); }
  50%{ box-shadow:0 0 0 1px color-mix(in srgb, var(--primary) 22%, transparent) inset,
    0 8px 28px color-mix(in srgb, var(--primary) 32%, transparent); }
}
@media (prefers-reduced-motion: reduce){
  .predict-widget{ animation:none; }
}
@media (max-width:640px){
  .predict-widget{ flex-wrap:wrap; }
  .predict-cta{ margin-left:0; }
}

/* ---------------- Klasių skirtukai ir „netrukus" žymos ---------------- */
.grade-tabs{ display:flex; gap:8px; flex-wrap:wrap; align-items:center; margin:0 0 22px; }
.grade-tabs .gtab{
  display:inline-flex; align-items:center; gap:6px; padding:9px 15px;
  border-radius:999px; text-decoration:none; font-weight:700; font-size:.9rem;
  color:var(--muted); background:var(--card); border:1.5px solid var(--border);
  transition:border-color var(--ease), color var(--ease), background var(--ease);
}
.grade-tabs .gtab:hover{ border-color:var(--brand, #4F46E5); color:var(--brand, #4F46E5); }
.grade-tabs .gtab.is-now{ background:var(--brand, #4F46E5); border-color:var(--brand, #4F46E5); color:#fff; }
.grade-tabs .gtab.is-soon{ opacity:.72; border-style:dashed; }
span.gtab.is-soon{ opacity:.55; cursor:not-allowed; }
a.gtab.is-soon:hover{ opacity:1; }
.gtab-soon, .nav-soon{
  font-size:.68rem; font-weight:700; padding:1px 7px; border-radius:999px;
  background:var(--border); color:var(--muted);
}
.nav-link.is-soon{ opacity:.5; cursor:not-allowed; }
.nav-link .nav-soon{ margin-left:auto; }

/* Gyvai kraunamų temų kortelės */
.topics-loading{ color:var(--muted); font-size:.9rem; }
.topic-card{ text-decoration:none; color:inherit; }
.topic-emoji{ font-size:1.7rem; line-height:1; }
