/* ============================================================
   Clutch — Exam Intelligence  ·  design system
   dark, playful, "Steam + Duolingo + behavioral science"
   ============================================================ */
:root{
  --bg:        #0e0f17;
  --bg-2:      #141625;
  --panel:     #181b2c;
  --panel-2:   #1f2336;
  --panel-3:   #262b42;
  --line:      #2c3150;
  --line-soft: #232846;

  --txt:       #eef1ff;
  --txt-2:     #aab0d4;
  --txt-3:     #6f769b;

  --violet:    #7c5cff;
  --violet-2:  #9d83ff;
  --lime:      #c6f135;
  --lime-2:    #d8ff5e;
  --cyan:      #34e0e0;
  --pink:      #ff5d8f;
  --amber:     #ffba49;
  --green:     #3ddc84;
  --red:       #ff6160;

  --grad-hero: radial-gradient(1200px 600px at 80% -10%, rgba(124,92,255,.30), transparent 60%),
               radial-gradient(900px 500px at 0% 0%, rgba(52,224,224,.14), transparent 55%);
  --shadow:    0 18px 50px -22px rgba(0,0,0,.85);
  --shadow-sm: 0 8px 24px -14px rgba(0,0,0,.7);
  --r:   18px;
  --r-sm:12px;
  --r-lg:26px;
  --fast:.16s cubic-bezier(.4,0,.2,1);
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:'Inter',system-ui,sans-serif;
  background:var(--bg);
  color:var(--txt);
  -webkit-font-smoothing:antialiased;
  min-height:100vh;
  line-height:1.5;
}
h1,h2,h3,h4,.brand-name{font-family:'Sora',sans-serif;letter-spacing:-.02em;margin:0}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:none}
::selection{background:var(--violet);color:#fff}
.mono{font-family:'JetBrains Mono',monospace}

/* scrollbar */
*::-webkit-scrollbar{width:10px;height:10px}
*::-webkit-scrollbar-thumb{background:var(--panel-3);border-radius:20px;border:2px solid var(--bg)}
*::-webkit-scrollbar-track{background:transparent}

/* ============================ TOP BAR ============================ */
.topbar{
  position:sticky;top:0;z-index:50;
  display:flex;align-items:center;gap:24px;
  padding:14px 26px;
  background:rgba(14,15,23,.82);
  backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line-soft);
}
.brand{display:flex;align-items:baseline;gap:9px}
.brand-mark{font-size:22px;transform:translateY(2px)}
.brand-name{font-size:21px;font-weight:800;background:linear-gradient(92deg,#fff,var(--violet-2));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.brand-tag{font-size:11px;color:var(--txt-3);font-weight:600;text-transform:uppercase;letter-spacing:.14em}
.topnav{display:flex;gap:6px;margin-left:8px}
.navlink{
  padding:8px 14px;border-radius:11px;font-size:14px;font-weight:600;color:var(--txt-2);
  transition:var(--fast);
}
.navlink:hover{color:var(--txt);background:var(--panel)}
.navlink.active{color:var(--txt);background:var(--panel-2)}
.btn-new{margin-left:auto}

/* ============================ BUTTONS ============================ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 18px;border-radius:13px;font-size:14px;font-weight:700;
  background:var(--panel-2);color:var(--txt);transition:var(--fast);
  border:1px solid var(--line-soft);white-space:nowrap;
}
.btn:hover{transform:translateY(-1px);background:var(--panel-3)}
.btn:active{transform:translateY(0)}
.btn-primary{
  background:linear-gradient(95deg,var(--violet),#6a4bff);border:none;color:#fff;
  box-shadow:0 10px 28px -12px var(--violet);
}
.btn-primary:hover{filter:brightness(1.08);background:linear-gradient(95deg,var(--violet),#6a4bff)}
.btn-lime{background:linear-gradient(95deg,var(--lime),var(--lime-2));color:#1a2003;border:none;box-shadow:0 10px 26px -12px var(--lime)}
.btn-lime:hover{filter:brightness(1.05);background:linear-gradient(95deg,var(--lime),var(--lime-2))}
.btn-ghost{background:transparent;border:1px solid var(--line)}
.btn-danger{background:transparent;border:1px solid var(--red);color:var(--red)}
.btn-danger:hover{background:rgba(255,97,96,.12)}
.btn-sm{padding:7px 12px;font-size:12.5px;border-radius:10px}
.btn-lg{padding:15px 26px;font-size:16px;border-radius:15px}
.btn:disabled{opacity:.45;cursor:not-allowed;transform:none}

/* ============================ LAYOUT ============================ */
.view{max-width:1180px;margin:0 auto;padding:34px 26px 70px;min-height:60vh}
.footer{
  max-width:1180px;margin:0 auto;padding:26px;display:flex;gap:10px;align-items:center;
  color:var(--txt-3);font-size:13px;border-top:1px solid var(--line-soft);flex-wrap:wrap;
}
.footer .dot{opacity:.4}
.section-title{font-size:15px;font-weight:700;color:var(--txt-2);text-transform:uppercase;letter-spacing:.1em;margin:34px 0 16px;display:flex;align-items:center;gap:10px}
.section-title .count{color:var(--txt-3);font-weight:600;font-size:13px}

/* ============================ HERO ============================ */
.hero{
  position:relative;overflow:hidden;border-radius:var(--r-lg);
  background:var(--panel);border:1px solid var(--line-soft);
  padding:46px 44px;background-image:var(--grad-hero);box-shadow:var(--shadow);
}
.hero h1{font-size:clamp(30px,4.6vw,50px);font-weight:800;line-height:1.04;max-width:16ch}
.hero h1 .hl{background:linear-gradient(95deg,var(--lime),var(--cyan));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero p{color:var(--txt-2);font-size:17px;max-width:52ch;margin:18px 0 26px}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap}
.hero-badges{display:flex;gap:8px;margin-top:26px;flex-wrap:wrap}
.chip{display:inline-flex;align-items:center;gap:6px;padding:7px 13px;border-radius:999px;background:var(--panel-2);border:1px solid var(--line-soft);font-size:12.5px;font-weight:600;color:var(--txt-2)}

/* ============================ CARDS / GRID ============================ */
.grid{display:grid;gap:16px}
.stat-grid{grid-template-columns:repeat(auto-fit,minmax(180px,1fr))}
.card{
  background:var(--panel);border:1px solid var(--line-soft);border-radius:var(--r);
  padding:20px;transition:var(--fast);position:relative;overflow:hidden;
}
.card.hover:hover{border-color:var(--line);transform:translateY(-2px);box-shadow:var(--shadow-sm)}
.stat{display:flex;flex-direction:column;gap:6px}
.stat .label{font-size:12.5px;color:var(--txt-3);font-weight:600;text-transform:uppercase;letter-spacing:.06em}
.stat .val{font-size:30px;font-weight:800;font-family:'Sora';letter-spacing:-.03em}
.stat .sub{font-size:12.5px;color:var(--txt-2)}
.stat .val.good{color:var(--green)}.stat .val.bad{color:var(--red)}.stat .val.mid{color:var(--amber)}

/* metric card w/ explanation */
.metric{display:flex;flex-direction:column;gap:8px}
.metric .top{display:flex;align-items:center;justify-content:space-between;gap:10px}
.metric .name{font-size:13.5px;font-weight:700;display:flex;align-items:center;gap:8px}
.metric .big{font-size:26px;font-weight:800;font-family:'Sora'}
.metric .desc{font-size:12.5px;color:var(--txt-3);line-height:1.45}
.metric .bar{height:8px;border-radius:8px;background:var(--panel-3);overflow:hidden;margin-top:2px}
.metric .bar > i{display:block;height:100%;border-radius:8px;background:linear-gradient(90deg,var(--violet),var(--cyan));transition:width .6s cubic-bezier(.4,0,.2,1)}
.pill{font-size:11px;font-weight:700;padding:3px 9px;border-radius:999px;letter-spacing:.02em}
.pill.good{background:rgba(61,220,132,.16);color:var(--green)}
.pill.bad{background:rgba(255,97,96,.16);color:var(--red)}
.pill.mid{background:rgba(255,186,73,.16);color:var(--amber)}
.pill.neutral{background:var(--panel-3);color:var(--txt-2)}

/* ============================ LISTS (tests/history) ============================ */
.test-row{
  display:flex;align-items:center;gap:16px;padding:16px 18px;border-radius:var(--r-sm);
  background:var(--panel);border:1px solid var(--line-soft);transition:var(--fast);cursor:pointer;
}
.test-row:hover{border-color:var(--line);transform:translateX(2px);background:var(--panel-2)}
.test-row .score-badge{
  width:54px;height:54px;border-radius:14px;display:grid;place-items:center;flex:none;
  font-family:'Sora';font-weight:800;font-size:18px;background:var(--panel-3);
}
.test-row .meta{flex:1;min-width:0}
.test-row .meta h4{font-size:15.5px;margin-bottom:3px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.test-row .meta .line{font-size:12.5px;color:var(--txt-3);display:flex;gap:10px;flex-wrap:wrap}
.tag{font-size:11px;font-weight:700;padding:3px 9px;border-radius:7px;background:rgba(124,92,255,.16);color:var(--violet-2)}
.empty{text-align:center;padding:60px 20px;color:var(--txt-3)}
.empty .ico{font-size:46px;margin-bottom:14px}

/* ============================ FORMS / MODAL ============================ */
.modal-bg{position:fixed;inset:0;background:rgba(5,6,12,.72);backdrop-filter:blur(6px);z-index:100;display:grid;place-items:center;padding:20px;animation:fade .2s}
.modal{width:min(720px,100%);max-height:92vh;overflow:auto;background:var(--panel);border:1px solid var(--line);border-radius:var(--r-lg);padding:30px;box-shadow:var(--shadow);animation:pop .24s cubic-bezier(.2,.8,.3,1.2)}
.modal h2{font-size:24px;margin-bottom:6px}
.modal .sub{color:var(--txt-2);font-size:14px;margin-bottom:24px}
.field{margin-bottom:20px}
.field > label{display:block;font-size:13px;font-weight:700;margin-bottom:8px;color:var(--txt)}
.field .hint{font-size:12px;color:var(--txt-3);font-weight:500;margin-left:6px}
input[type=text],input[type=number],select,textarea{
  width:100%;padding:12px 14px;border-radius:11px;background:var(--bg-2);border:1px solid var(--line);
  color:var(--txt);font-size:14.5px;font-family:inherit;transition:var(--fast);
}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--violet);box-shadow:0 0 0 3px rgba(124,92,255,.18)}
.row{display:flex;gap:14px;flex-wrap:wrap}
.row > .field{flex:1;min-width:140px}
.choices{display:flex;gap:8px;flex-wrap:wrap}
.choice{
  padding:9px 14px;border-radius:11px;background:var(--bg-2);border:1px solid var(--line);
  font-size:13.5px;font-weight:600;color:var(--txt-2);transition:var(--fast);user-select:none;
}
.choice:hover{border-color:var(--line)}
.choice.on{background:var(--violet);border-color:var(--violet);color:#fff}
.choice.on.lime{background:var(--lime);border-color:var(--lime);color:#1a2003}
.drop{
  border:2px dashed var(--line);border-radius:var(--r);padding:26px;text-align:center;
  background:var(--bg-2);transition:var(--fast);cursor:pointer;
}
.drop:hover,.drop.drag{border-color:var(--violet);background:rgba(124,92,255,.07)}
.drop .ico{font-size:34px;margin-bottom:8px}
.drop.has{border-style:solid;border-color:var(--green);background:rgba(61,220,132,.06)}
.modal-actions{display:flex;gap:12px;justify-content:flex-end;margin-top:28px;flex-wrap:wrap}

/* ============================ TEST RUNNER ============================ */
.runner{position:fixed;inset:0;z-index:80;background:var(--bg);display:grid;grid-template-rows:auto 1fr;animation:fade .2s}
.runner-bar{display:flex;align-items:center;gap:16px;padding:12px 20px;background:var(--panel);border-bottom:1px solid var(--line)}
.runner-bar .title{font-weight:700;font-size:15px}
.timer{font-family:'JetBrains Mono';font-weight:600;font-size:18px;padding:7px 14px;border-radius:11px;background:var(--bg-2);border:1px solid var(--line)}
.timer.warn{color:var(--amber);border-color:var(--amber)}
.timer.danger{color:var(--red);border-color:var(--red);animation:pulse 1s infinite}
.runner-body{display:grid;grid-template-columns:1fr 340px;overflow:hidden}
.pdf-stage{overflow:auto;padding:24px;display:flex;justify-content:center;align-items:flex-start;background:#0a0b12}
.pdf-stage canvas{max-width:100%;border-radius:10px;box-shadow:var(--shadow);background:#fff}
.q-panel{border-left:1px solid var(--line);background:var(--panel);overflow:auto;padding:22px;display:flex;flex-direction:column;gap:18px}
.q-head{display:flex;align-items:center;justify-content:space-between}
.q-head .qno{font-family:'Sora';font-weight:800;font-size:22px}
.q-head .qtime{font-family:'JetBrains Mono';font-size:13px;color:var(--txt-3)}
.panel-label{font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.08em;color:var(--txt-3);margin-bottom:9px}
.opt-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(54px,1fr));gap:8px}
.opt{
  aspect-ratio:1;display:grid;place-items:center;border-radius:12px;background:var(--bg-2);
  border:1px solid var(--line);font-weight:800;font-size:17px;font-family:'Sora';transition:var(--fast);
}
.opt:hover{border-color:var(--violet-2)}
.opt.on{background:var(--violet);border-color:var(--violet);color:#fff;transform:scale(1.03)}
.conf-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.conf{padding:11px;border-radius:12px;background:var(--bg-2);border:1px solid var(--line);font-weight:700;font-size:13px;display:flex;align-items:center;gap:8px;transition:var(--fast)}
.conf:hover{border-color:var(--line)}
.conf.on{color:#fff}
.conf[data-c=high].on{background:var(--green);border-color:var(--green);color:#04210f}
.conf[data-c=med].on{background:var(--amber);border-color:var(--amber);color:#2a1c00}
.conf[data-c=low].on{background:var(--cyan);border-color:var(--cyan);color:#022}
.conf[data-c=tukka].on{background:var(--pink);border-color:var(--pink);color:#fff}
.state-row{display:flex;gap:8px;flex-wrap:wrap}
.skip-reasons{display:flex;flex-direction:column;gap:6px}
.skip-reasons .choice{text-align:left;justify-content:flex-start}
.nav-row{display:flex;gap:10px;margin-top:auto;padding-top:8px}
.nav-row .btn{flex:1}

/* question palette */
.palette{padding:14px 20px;background:var(--panel);border-top:1px solid var(--line);display:flex;gap:7px;flex-wrap:wrap;align-items:center;max-height:120px;overflow:auto}
.pal{
  width:34px;height:34px;border-radius:9px;display:grid;place-items:center;font-size:13px;font-weight:700;
  background:var(--bg-2);border:1px solid var(--line);transition:var(--fast);font-family:'JetBrains Mono';
}
.pal:hover{transform:scale(1.08)}
.pal.cur{outline:2px solid var(--txt);outline-offset:1px}
.pal.answered{background:var(--green);color:#04210f;border-color:var(--green)}
.pal.review{background:var(--violet);color:#fff;border-color:var(--violet)}
.pal.tukka{background:var(--pink);color:#fff;border-color:var(--pink)}
.pal.skipped{background:var(--amber);color:#2a1c00;border-color:var(--amber)}
.pal-legend{display:flex;gap:14px;flex-wrap:wrap;font-size:12px;color:var(--txt-3);margin-left:auto}
.pal-legend span{display:flex;align-items:center;gap:5px}
.pal-legend i{width:12px;height:12px;border-radius:4px;display:inline-block}

/* ============================ RESULTS ============================ */
.result-hero{display:grid;grid-template-columns:auto 1fr;gap:30px;align-items:center;background:var(--panel);border:1px solid var(--line-soft);border-radius:var(--r-lg);padding:32px;background-image:var(--grad-hero);overflow:hidden}
.score-ring{width:150px;height:150px;position:relative;flex:none}
.score-ring svg{transform:rotate(-90deg)}
.score-ring .num{position:absolute;inset:0;display:grid;place-items:center;flex-direction:column;text-align:center}
.score-ring .num b{font-size:34px;font-family:'Sora';font-weight:800;line-height:1}
.score-ring .num small{font-size:12px;color:var(--txt-3)}
.tabs{display:flex;gap:6px;margin:28px 0 20px;border-bottom:1px solid var(--line-soft);flex-wrap:wrap}
.tab{padding:11px 16px;font-size:14px;font-weight:700;color:var(--txt-3);border-bottom:2px solid transparent;transition:var(--fast)}
.tab:hover{color:var(--txt-2)}
.tab.active{color:var(--txt);border-bottom-color:var(--violet)}
.chart-card{background:var(--panel);border:1px solid var(--line-soft);border-radius:var(--r);padding:20px}
.chart-card h3{font-size:15px;margin-bottom:4px}
.chart-card p{font-size:12.5px;color:var(--txt-3);margin:0 0 14px}
.chart-wrap{position:relative;height:260px}

/* per-question table */
.qtable{width:100%;border-collapse:collapse;font-size:13px}
.qtable th{text-align:left;padding:10px 10px;color:var(--txt-3);font-weight:700;font-size:11.5px;text-transform:uppercase;letter-spacing:.05em;border-bottom:1px solid var(--line)}
.qtable td{padding:10px 10px;border-bottom:1px solid var(--line-soft)}
.qtable tr:hover td{background:var(--panel-2)}
.dot-c{width:9px;height:9px;border-radius:50%;display:inline-block;margin-right:6px}
.c-correct{background:var(--green)}.c-wrong{background:var(--red)}.c-skip{background:var(--txt-3)}

/* ============================ BADGES ============================ */
.badge-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:16px}
.badge{
  background:var(--panel);border:1px solid var(--line-soft);border-radius:var(--r);padding:20px;
  position:relative;overflow:hidden;transition:var(--fast);
}
.badge.earned{border-color:var(--line)}
.badge.earned::before{content:'';position:absolute;inset:0;background:radial-gradient(120px 80px at 80% 0%,var(--glow,rgba(124,92,255,.18)),transparent 70%);pointer-events:none}
.badge.locked{opacity:.5;filter:grayscale(.6)}
.badge .emoji{font-size:36px;margin-bottom:10px;display:block}
.badge h4{font-size:16px;margin-bottom:4px}
.badge .def{font-size:12.5px;color:var(--txt-3);line-height:1.45}
.badge .got{position:absolute;top:14px;right:14px;font-size:11px;font-weight:800;color:var(--lime);text-transform:uppercase;letter-spacing:.05em}
.badge .locktag{position:absolute;top:14px;right:14px;font-size:14px;opacity:.6}

/* badge shelf (home) */
.shelf{display:flex;gap:12px;overflow-x:auto;padding-bottom:6px}
.shelf .badge{min-width:200px}

/* ============================ LEADERBOARD ============================ */
.lb-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:16px}
.lb{background:var(--panel);border:1px solid var(--line-soft);border-radius:var(--r);padding:20px}
.lb h3{font-size:15px;display:flex;align-items:center;gap:8px;margin-bottom:4px}
.lb p{font-size:12px;color:var(--txt-3);margin:0 0 14px}
.lb-row{display:flex;align-items:center;gap:12px;padding:9px 0;border-bottom:1px solid var(--line-soft)}
.lb-row:last-child{border:none}
.lb-rank{width:26px;height:26px;border-radius:8px;display:grid;place-items:center;font-weight:800;font-size:13px;background:var(--panel-3);flex:none;font-family:'JetBrains Mono'}
.lb-row:nth-child(1) .lb-rank{background:var(--amber);color:#2a1c00}
.lb-name{flex:1;font-size:13.5px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.lb-val{font-family:'JetBrains Mono';font-weight:700;font-size:14px}
.banner{background:linear-gradient(95deg,rgba(124,92,255,.16),rgba(52,224,224,.10));border:1px solid var(--line);border-radius:var(--r);padding:16px 20px;font-size:13.5px;color:var(--txt-2);display:flex;align-items:center;gap:12px;margin-bottom:20px}
.banner b{color:var(--txt)}

/* ============================ MISC ============================ */
.toast{
  position:fixed;bottom:26px;left:50%;transform:translateX(-50%) translateY(40px);
  background:var(--panel-3);border:1px solid var(--line);color:var(--txt);
  padding:13px 20px;border-radius:13px;font-size:14px;font-weight:600;z-index:200;
  opacity:0;pointer-events:none;transition:.3s cubic-bezier(.2,.8,.3,1.2);box-shadow:var(--shadow);
}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
.toast.ok{border-color:var(--green)}.toast.err{border-color:var(--red)}
.flex{display:flex;align-items:center;gap:10px}
.between{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}
.muted{color:var(--txt-3)}
.spinner{width:42px;height:42px;border:3px solid var(--line);border-top-color:var(--violet);border-radius:50%;animation:spin .8s linear infinite;margin:40px auto}
.loading{text-align:center;padding:40px;color:var(--txt-3)}

@keyframes fade{from{opacity:0}to{opacity:1}}
@keyframes pop{from{opacity:0;transform:scale(.94)}to{opacity:1;transform:scale(1)}}
@keyframes spin{to{transform:rotate(360deg)}}
@keyframes pulse{50%{opacity:.55}}

/* ============================ RESPONSIVE ============================ */
@media(max-width:860px){
  .topnav{display:none}
  .runner-body{grid-template-columns:1fr;grid-template-rows:1fr auto}
  .q-panel{border-left:none;border-top:1px solid var(--line);max-height:46vh}
  .result-hero{grid-template-columns:1fr;text-align:center;justify-items:center}
  .hero{padding:32px 24px}
}
@media(max-width:560px){
  .view{padding:22px 16px 60px}
  .topbar{padding:12px 16px;gap:12px}
  .brand-tag{display:none}
}