/* app.css — layout and components. Colors come from tokens.css only. */
*{box-sizing:border-box}
[hidden]{display:none!important}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--font-body);font-size:17px;line-height:1.55;color:var(--text);background:var(--bg);min-height:100vh}
body::before{content:"";position:fixed;inset:0;z-index:-1;background:var(--bg-image) center top/cover no-repeat;opacity:.35}
h1,h2,h3{font-family:var(--font-head);line-height:1.2;margin:0 0 .4em}
h1{font-size:clamp(26px,3.4vw,36px)} h2{font-size:24px} h3{font-size:19px}
a{color:var(--primary)}
:focus-visible{outline:3px solid var(--focus);outline-offset:2px;border-radius:6px}
.wrap{max-width:1180px;margin:0 auto;padding:0 18px}
.skip{position:absolute;left:-999px}.skip:focus{left:8px;top:8px;background:var(--surface);padding:8px 12px;z-index:99}
.muted{color:var(--muted)} .small{font-size:14px} .mono{font-family:var(--font-mono)}

/* header */
.top{position:sticky;top:0;z-index:40;background:var(--surface);border-bottom:1px solid var(--border)}
.top .wrap{display:flex;align-items:center;gap:18px;height:62px}
.brand{font-family:var(--font-head);font-weight:800;font-size:19px;text-decoration:none;color:var(--text);display:flex;align-items:center;gap:8px;white-space:nowrap}
.brand .dot{width:26px;height:26px;border-radius:8px;background:var(--primary);display:inline-block}
.nav{display:flex;gap:4px;margin-left:auto;flex-wrap:wrap}
.nav a{text-decoration:none;color:var(--muted);font-weight:600;font-size:15px;padding:8px 12px;border-radius:999px}
.nav a:hover{background:var(--surface-2);color:var(--text)}
.nav a[aria-current="page"]{background:var(--primary);color:var(--on-primary)}
.countdown-pill{font-weight:700;font-size:14px;background:var(--surface-2);padding:6px 12px;border-radius:999px;white-space:nowrap}
@media (max-width:860px){
  .nav{position:fixed;bottom:0;left:0;right:0;background:var(--surface);border-top:1px solid var(--border);justify-content:space-around;padding:6px 4px;margin:0;flex-wrap:nowrap;z-index:50}
  .nav a{font-size:12.5px;padding:8px 6px;text-align:center}
  body{padding-bottom:64px}
  .countdown-pill{margin-left:auto}
}

/* layout */
main{padding:26px 0 60px}
.grid{display:grid;gap:16px}
.g2{grid-template-columns:repeat(2,1fr)} .g3{grid-template-columns:repeat(3,1fr)} .g4{grid-template-columns:repeat(4,1fr)}
@media (max-width:900px){.g3,.g4{grid-template-columns:repeat(2,1fr)}}
@media (max-width:600px){.g2,.g3,.g4{grid-template-columns:1fr}}
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow)}
.card.flat{box-shadow:none}
.section-title{display:flex;align-items:baseline;justify-content:space-between;gap:12px;margin:28px 0 12px}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:0 18px;border-radius:999px;border:1px solid transparent;background:var(--primary);color:var(--on-primary);font:600 15px var(--font-body);text-decoration:none;cursor:pointer}
.btn:hover{background:var(--primary-hover)}
.btn.ghost{background:transparent;color:var(--primary);border-color:var(--border)}
.btn.ghost:hover{background:var(--surface-2)}
.btn.sm{min-height:34px;padding:0 12px;font-size:14px}
.btn[disabled]{opacity:.5;cursor:not-allowed}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}

/* stats */
.big{font-family:var(--font-head);font-size:44px;font-weight:800;line-height:1}
.stat-label{font-size:13px;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);font-weight:700}
.bar{height:10px;background:var(--surface-2);border-radius:999px;overflow:hidden;margin-top:8px}
.bar>span{display:block;height:100%;background:var(--primary);border-radius:999px}
.bar.good>span{background:var(--success)} .bar.mid>span{background:var(--warning)} .bar.low>span{background:var(--danger)}
.pill{display:inline-block;font-size:12.5px;font-weight:700;padding:3px 10px;border-radius:999px;background:var(--surface-2);color:var(--muted)}
.pill.ok{background:var(--success-bg);color:var(--success)} .pill.warn{background:var(--warning-bg);color:var(--warning)} .pill.bad{background:var(--danger-bg);color:var(--danger)}
.gate-line{display:flex;justify-content:space-between;gap:10px;padding:10px 0;border-bottom:1px solid var(--border)}
.gate-line:last-child{border-bottom:0}

/* topics */
details.sec{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);margin-bottom:12px;box-shadow:var(--shadow)}
details.sec>summary{list-style:none;cursor:pointer;padding:16px 20px;display:grid;grid-template-columns:1fr auto;gap:6px 14px;align-items:center}
details.sec>summary::-webkit-details-marker{display:none}
.obj{display:grid;grid-template-columns:auto 1fr auto;gap:12px;align-items:center;padding:12px 20px;border-top:1px solid var(--border)}
.obj .id{font-family:var(--font-mono);font-weight:700;color:var(--primary)}
@media (max-width:700px){.obj{grid-template-columns:auto 1fr}.obj .row{grid-column:1/-1}}

/* quiz */
.qcard{max-width:860px;margin:0 auto}
.qmeta{display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap;margin-bottom:10px}
.qtext{font-size:19px;font-weight:600;margin:6px 0 16px}
.opt{display:flex;gap:12px;width:100%;text-align:left;padding:14px 16px;margin-bottom:10px;border:2px solid var(--border);border-radius:var(--radius-sm);background:var(--surface);color:var(--text);font:16px var(--font-body);cursor:pointer}
.opt:hover{border-color:var(--primary)}
.opt .key{font-family:var(--font-mono);font-weight:700;color:var(--primary);min-width:20px}
.opt[aria-pressed="true"]{border-color:var(--primary);background:var(--surface-2)}
.opt.correct{border-color:var(--success);background:var(--success-bg)}
.opt.wrong{border-color:var(--danger);background:var(--danger-bg)}
.feedback{border-radius:var(--radius-sm);padding:14px 16px;margin-top:8px}
.feedback.ok{background:var(--success-bg)} .feedback.bad{background:var(--danger-bg)}
.modes{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:16px}
select,input[type=text],textarea{font:16px var(--font-body);padding:10px 12px;border-radius:var(--radius-sm);border:1px solid var(--border);background:var(--surface);color:var(--text)}
textarea{width:100%;min-height:80px}

/* mock */
.mock-layout{display:grid;grid-template-columns:1fr 280px;gap:18px;align-items:start}
@media (max-width:900px){.mock-layout{grid-template-columns:1fr}}
.navgrid{display:grid;grid-template-columns:repeat(6,1fr);gap:6px}
.navgrid button{height:38px;border-radius:8px;border:1px solid var(--border);background:var(--surface);color:var(--text);font:600 13px var(--font-mono);cursor:pointer}
.navgrid button.ans{background:var(--surface-2);border-color:var(--primary)}
.navgrid button.flag{box-shadow:inset 0 -4px 0 var(--warning)}
.navgrid button.cur{outline:3px solid var(--accent)}
.timer{font-family:var(--font-mono);font-size:28px;font-weight:700}
.timer.low{color:var(--danger)}

/* project */
.lesson{display:grid;grid-template-columns:52px 1fr;gap:14px}
.lesson .num{width:44px;height:44px;border-radius:50%;display:grid;place-items:center;font-weight:800;background:var(--surface-2);color:var(--primary);font-family:var(--font-head)}
.lesson.done .num{background:var(--success);color:#fff}
.lesson.doing .num{background:var(--warning-bg);color:var(--warning)}
.lesson ol{margin:8px 0 0;padding-left:20px}

/* path + log */
.path{display:grid;grid-template-columns:repeat(6,1fr);gap:10px}
@media (max-width:900px){.path{grid-template-columns:1fr}}
.step{border:2px solid var(--border);border-radius:var(--radius);padding:14px;background:var(--surface)}
.step.now{border-color:var(--primary)} .step.goal{border-color:var(--accent)}
.log-entry{border-left:3px solid var(--primary);padding:4px 0 4px 14px;margin-bottom:18px}

/* corner drill widget */
.drill-fab{position:fixed;right:18px;bottom:18px;z-index:45}
@media (max-width:860px){.drill-fab{bottom:78px}}
.drill-panel{position:fixed;right:18px;bottom:76px;width:min(380px,calc(100vw - 36px));max-height:70vh;overflow:auto;z-index:46}
@media (max-width:860px){.drill-panel{bottom:136px}}
.drill-panel .opt{padding:10px 12px;font-size:15px}

/* login */
.login{min-height:100vh;display:grid;place-items:center;padding:20px}
.login .card{max-width:440px;text-align:center}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important;scroll-behavior:auto!important}}

/* ================= SPACE THEME LAYER (ChatGPT design, applied 2026-11-12) ================= */
body{background:var(--bg);font-size:16px}
body::before{content:"";position:fixed;inset:0;z-index:-2;opacity:1;background:var(--bg-image) right center/cover no-repeat}
body::after{content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;
  background:linear-gradient(90deg,rgba(3,8,18,.96) 0%,rgba(3,8,18,.86) 45%,rgba(3,8,18,.35) 78%,rgba(3,8,18,.1) 100%),
             radial-gradient(1200px 500px at 80% -10%,rgba(0,175,255,.18),transparent 60%);
  animation:atmo 18s ease-in-out infinite alternate}
@keyframes atmo{from{opacity:.92}to{opacity:1}}
@media (max-width:900px){body::before{background-position:78% center;opacity:.35}body::after{background:linear-gradient(180deg,rgba(3,8,18,.9),rgba(3,8,18,.97))}}
.wrap{max-width:1440px;padding:0 clamp(16px,3vw,48px)}
h1,h2,h3{letter-spacing:-.01em}
h1{font-size:clamp(28px,3vw,40px)}

/* nav */
.top{background:var(--nav-bg);backdrop-filter:blur(10px);border-bottom:1px solid rgba(40,85,119,.6);box-shadow:0 1px 0 rgba(0,175,255,.15)}
.top .wrap{height:66px}
.brand{font-family:var(--font-head);font-weight:700;letter-spacing:.01em}
.brand .dot{background:none;width:34px;height:24px;border-radius:0}
.nav a{color:var(--muted);border:1px solid transparent}
.nav a:hover{background:rgba(0,175,255,.08);color:var(--text)}
.nav a[aria-current="page"]{background:rgba(0,175,255,.14);color:var(--text);border-color:var(--primary);box-shadow:var(--glow)}
.countdown-pill{background:rgba(0,175,255,.1);border:1px solid var(--border);font-family:var(--font-mono);color:var(--cyan)}

/* cards = cockpit panels */
.card,details.sec{background:var(--surface);border:1px solid rgba(40,85,119,.75);backdrop-filter:blur(8px);
  box-shadow:var(--shadow),inset 0 1px 0 rgba(54,216,255,.08);position:relative}
.card::before{content:"";position:absolute;left:14px;right:14px;top:0;height:1px;background:linear-gradient(90deg,transparent,rgba(54,216,255,.55),transparent);pointer-events:none}
.stat-label{color:var(--text);letter-spacing:.06em;font-family:var(--font-head);font-size:14px;display:flex;align-items:center;gap:10px}
.stat-label svg{width:20px;height:20px;stroke:var(--cyan);flex:none}
.big{font-family:var(--font-mono);font-size:clamp(56px,6vw,72px);font-weight:700;color:var(--text);text-shadow:0 0 24px rgba(0,175,255,.45)}
.bar{background:rgba(40,85,119,.45);height:6px}
.bar>span{background:linear-gradient(90deg,var(--primary),var(--cyan));box-shadow:0 0 10px rgba(0,175,255,.6);transition:width .6s ease}
.bar.good>span{background:linear-gradient(90deg,#1FBF6A,var(--success))} .bar.mid>span{background:linear-gradient(90deg,var(--accent),var(--warning))} .bar.low>span{background:linear-gradient(90deg,#E5483C,var(--danger))}
.pill{background:rgba(0,175,255,.12);color:var(--cyan);border:1px solid rgba(0,175,255,.35)}
.pill.ok{border-color:rgba(61,220,132,.4)} .pill.warn{border-color:rgba(255,134,28,.45)} .pill.bad{border-color:rgba(255,107,94,.5)}
.gate-line{border-color:rgba(40,85,119,.55)}

/* buttons */
.btn{background:linear-gradient(180deg,#22BFFF,var(--primary));color:var(--on-primary);box-shadow:0 0 18px rgba(0,175,255,.35);transition:box-shadow .2s,transform .2s}
.btn:hover{background:linear-gradient(180deg,#5CE2FF,var(--cyan));box-shadow:0 0 26px rgba(54,216,255,.55)}
.btn.ghost{background:transparent;color:var(--text);border-color:var(--text);box-shadow:none}
.btn.ghost:hover{border-color:var(--cyan);color:var(--cyan);background:rgba(0,175,255,.08)}

/* section tiles */
.tile{display:grid;grid-template-columns:auto 1fr;gap:6px 16px;text-decoration:none;color:inherit;transition:transform .2s,box-shadow .2s,border-color .2s}
.tile:hover{transform:translateY(-3px);border-color:var(--primary);box-shadow:var(--shadow),var(--glow)}
.tile .ticon svg{width:34px;height:34px;stroke:var(--primary)}
.tile h3{font-size:17px;margin:6px 0 0}
.section-title h2{font-size:28px;display:flex;align-items:center;gap:12px}
.section-title h2::before{content:"//";color:var(--accent);font-family:var(--font-mono);font-weight:700}
.section-title a{color:var(--cyan);text-decoration:none;font-weight:600}

/* readiness gauge + weakest waveform */
.gate-wrap{display:grid;grid-template-columns:1fr auto;gap:18px;align-items:center}
.gauge{width:128px;height:128px;position:relative}
.gauge svg{width:100%;height:100%;transform:rotate(-90deg)}
.gauge .val{position:absolute;inset:0;display:grid;place-items:center;text-align:center;font-family:var(--font-mono);font-weight:700;font-size:26px;line-height:1}
.gauge .val small{display:block;font:600 11px var(--font-body);color:var(--muted);letter-spacing:.08em;margin-top:4px}
.gauge circle{transition:stroke-dashoffset .8s ease}
@media (max-width:500px){.gate-wrap{grid-template-columns:1fr}.gauge{margin:auto}}
.wave{position:absolute;left:0;right:0;bottom:0;height:70px;opacity:.55;pointer-events:none}

/* quiz + mock in cockpit style */
.opt{background:rgba(8,21,34,.85);border-color:rgba(40,85,119,.8)}
.opt:hover{border-color:var(--primary);box-shadow:0 0 14px rgba(0,175,255,.25)}
.opt .key{color:var(--cyan)}
.opt.correct{background:var(--success-bg);border-color:var(--success)} .opt.wrong{background:var(--danger-bg);border-color:var(--danger)}
.feedback.ok{background:var(--success-bg);border:1px solid rgba(61,220,132,.4)} .feedback.bad{background:var(--danger-bg);border:1px solid rgba(255,107,94,.45)}
.navgrid button{background:rgba(8,21,34,.85);border-color:rgba(40,85,119,.8)}
.timer{color:var(--cyan)}
select,input[type=text],textarea{background:rgba(8,21,34,.9);border-color:var(--border);color:var(--text)}
.drill-fab{background:rgba(7,17,31,.9);color:var(--text);border:1px solid var(--primary);box-shadow:var(--glow)}
.lesson .num{background:rgba(0,175,255,.14);color:var(--cyan);border:1px solid var(--border)}
.step.now{box-shadow:var(--glow)} .step.goal{border-color:var(--accent)}
.step{background:var(--surface)}
.log-entry{border-left-color:var(--accent)}
.obj .id{color:var(--cyan)}

/* entrance */
.card{animation:rise .45s ease both}
@keyframes rise{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
@media (prefers-reduced-motion:reduce){body::after,.card{animation:none}}
@media (forced-colors:active){.card,.btn,.pill,.opt{border:1px solid CanvasText}.bar>span{background:Highlight}}