/* ============================================================
   AI Engineers Academy — shared brand & theme layer
   Used by storefront/ and app/ (and mirrors admin themes a/b/c/d)
   Fonts (Space Grotesk, JetBrains Mono, Inter) loaded in each HTML head.
   ============================================================ */
*{margin:0;padding:0;box-sizing:border-box}
html,body{min-height:100%}
body{background:var(--bg);color:var(--text);font-family:var(--font-ui);font-size:15px;line-height:1.6;-webkit-font-smoothing:antialiased}
::selection{background:color-mix(in srgb,var(--accent) 35%, transparent)}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
img{max-width:100%;display:block}
::-webkit-scrollbar{width:11px;height:11px}
::-webkit-scrollbar-thumb{background:var(--border-strong);border-radius:10px;border:3px solid var(--bg)}
::-webkit-scrollbar-thumb:hover{background:var(--muted)}

:root{
  --rail:0;--topbar-h:62px;
  --font-ui:'Inter',system-ui,sans-serif;
  --font-display:'Space Grotesk','Inter',sans-serif;
  --font-mono:'JetBrains Mono',ui-monospace,monospace;
  --maxw:1180px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ── THEME B · POLERET (default) ───────────────────────────── */
:root,[data-dir="b"]{
  --bg:#0c0f17;--bg-grad:radial-gradient(1200px 640px at 80% -10%, color-mix(in srgb,var(--accent) 16%, transparent), transparent 60%);
  --panel:#121622;--panel-2:#161b2a;--elevated:#1b2233;--border:#222a3b;--border-strong:#2c3650;
  --text:#eef2f9;--muted:#9aa6bd;--dim:#65718b;
  --accent:#5b8cff;--accent-2:#7aa2ff;--accent-soft:color-mix(in srgb,var(--accent) 14%, transparent);--accent-ink:#fff;
  --good:#34d399;--warn:#fbbf24;--bad:#fb7185;
  --font-display:'Space Grotesk','Inter',sans-serif;--font-num:'Space Grotesk','Inter',sans-serif;
  --panel-radius:14px;--radius:11px;--radius-sm:8px;--radius-xs:6px;
  --card-shadow:0 1px 0 rgba(255,255,255,.03) inset,0 8px 28px rgba(0,0,0,.35);
  --label-spacing:.04em;--label-transform:none;--display-transform:none;
}
/* ── THEME A · TERMINAL ────────────────────────────────────── */
[data-dir="a"]{
  --bg:#070a0c;--bg-grad:linear-gradient(transparent 95%, rgba(78,227,154,.04) 95%) 0 0/100% 28px,radial-gradient(900px 520px at 82% -10%, rgba(78,227,154,.07), transparent 60%);
  --panel:#0b0f11;--panel-2:#0d1214;--elevated:#11181a;--border:#16201f;--border-strong:#1f2d2a;
  --text:#cfe6d8;--muted:#7f9a8c;--dim:#4f655b;
  --accent:#4ee39a;--accent-2:#7ff0b7;--accent-soft:rgba(78,227,154,.1);--accent-ink:#04130c;
  --good:#4ee39a;--warn:#f5c451;--bad:#ff6b6b;
  --font-ui:'JetBrains Mono',ui-monospace,monospace;--font-display:'JetBrains Mono',monospace;--font-num:'JetBrains Mono',monospace;
  --panel-radius:4px;--radius:4px;--radius-sm:3px;--radius-xs:2px;
  --card-shadow:0 0 0 1px var(--border);
  --label-spacing:.12em;--label-transform:uppercase;--display-transform:uppercase;
}
/* ── THEME D · POLERET TERMINAL ────────────────────────────── */
[data-dir="d"]{
  --bg:#0b0e15;--bg-grad:linear-gradient(transparent 96%, rgba(45,212,167,.035) 96%) 0 0/100% 30px,radial-gradient(1100px 580px at 80% -8%, rgba(45,212,167,.1), transparent 60%);
  --panel:#11151f;--panel-2:#151a26;--elevated:#1b2230;--border:#212a3a;--border-strong:#2d3850;
  --text:#e9eef6;--muted:#93a0b6;--dim:#5e6b82;
  --accent:#2dd4a7;--accent-2:#5be3c2;--accent-soft:rgba(45,212,167,.13);--accent-ink:#04140e;
  --good:#34d399;--warn:#fbbf24;--bad:#fb7185;
  --font-ui:'Inter',system-ui,sans-serif;--font-display:'JetBrains Mono',monospace;--font-num:'JetBrains Mono',monospace;
  --panel-radius:10px;--radius:9px;--radius-sm:7px;--radius-xs:5px;
  --card-shadow:0 1px 0 rgba(255,255,255,.03) inset,0 6px 24px rgba(0,0,0,.34);
  --label-spacing:.1em;--label-transform:uppercase;--display-transform:uppercase;
}
/* ── THEME C · NEON ────────────────────────────────────────── */
[data-dir="c"]{
  --bg:#06070e;--bg-grad:radial-gradient(900px 540px at 12% -6%, rgba(34,211,238,.14), transparent 55%),radial-gradient(900px 540px at 88% 2%, rgba(168,85,247,.16), transparent 55%);
  --panel:rgba(22,20,42,.84);--panel-2:rgba(30,27,54,.86);--elevated:rgba(42,37,72,.9);--border:rgba(140,125,235,.28);--border-strong:rgba(150,135,245,.45);
  --text:#f2efff;--muted:#a99fd0;--dim:#7368a0;
  --accent:#22d3ee;--accent-2:#a855f7;--accent-soft:rgba(34,211,238,.13);--accent-ink:#04121a;
  --good:#34f5c5;--warn:#ffd34e;--bad:#ff6b9d;
  --font-display:'Space Grotesk','Inter',sans-serif;--font-num:'JetBrains Mono',monospace;
  --panel-radius:16px;--radius:13px;--radius-sm:9px;--radius-xs:7px;
  --card-shadow:0 1px 0 rgba(255,255,255,.05) inset,0 10px 40px rgba(0,0,0,.5);
  --glass:saturate(160%) blur(14px);
  --label-spacing:.06em;--label-transform:none;--display-transform:none;
}

/* ============================================================
   BACKDROP
   ============================================================ */
.bg-canvas{display:none}
.bg-tint{position:fixed;inset:0;z-index:-1;pointer-events:none;background:var(--bg-grad);opacity:.5}

/* ============================================================
   LAYOUT
   ============================================================ */
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.section{padding:84px 0}
@media(max-width:760px){.section{padding:52px 0}}

/* ── HEADER ─────────────────────────────────────────────────── */
.site-header{position:sticky;top:0;z-index:100;height:var(--topbar-h);display:flex;align-items:center;
  background:color-mix(in srgb,var(--bg) 80%, transparent);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--border)}
.site-header .inner{display:flex;align-items:center;gap:22px;width:100%}
.brand{display:flex;align-items:center;gap:10px;font-family:var(--font-display);font-weight:700;font-size:17px;letter-spacing:-.01em}
.brand .mark{width:30px;height:30px;border-radius:8px;display:grid;place-items:center;color:var(--accent-ink);
  font-weight:700;font-size:13px;background:linear-gradient(140deg,var(--accent),var(--accent-2));box-shadow:0 0 0 1px color-mix(in srgb,var(--accent) 40%, transparent)}
[data-dir="a"] .brand .mark{border-radius:3px}
.brand .ac{color:var(--accent)}
.site-nav{display:flex;gap:6px;align-items:center}
.site-nav a{padding:7px 12px;border-radius:var(--radius-sm);color:var(--muted);font-size:14px;font-weight:500;transition:.15s;white-space:nowrap}
.site-nav a:hover{color:var(--text);background:var(--elevated)}
.header-spacer{flex:1}
@media(max-width:900px){.site-nav{display:none}}

/* ── BUTTONS ────────────────────────────────────────────────── */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;height:42px;padding:0 20px;
  border-radius:var(--radius-sm);font-size:14.5px;font-weight:600;transition:.16s var(--ease);white-space:nowrap;min-height:44px}
.btn svg{width:17px;height:17px;stroke-width:2}
.btn-sm{height:38px;min-height:38px;padding:0 15px;font-size:13.5px}
.btn-primary{background:var(--accent);color:var(--accent-ink)}
.btn-primary:hover{filter:brightness(1.08);transform:translateY(-1px);box-shadow:0 8px 24px var(--accent-soft)}
.btn-primary:active{transform:translateY(0) scale(.985)}
.btn-ghost{background:var(--panel-2);border:1px solid var(--border);color:var(--text)}
.btn-ghost:hover{border-color:var(--border-strong);background:var(--elevated)}
.btn-outline{background:transparent;border:1.5px solid var(--border-strong);color:var(--text)}
.btn-outline:hover{border-color:var(--accent);color:var(--accent)}

/* ── CARDS / PANELS ─────────────────────────────────────────── */
.card{background:var(--panel);border:1px solid var(--border);border-radius:var(--panel-radius);box-shadow:var(--card-shadow);
  transition:transform .25s var(--ease),border-color .25s,box-shadow .25s}
[data-dir="c"] .card{backdrop-filter:var(--glass);-webkit-backdrop-filter:var(--glass)}
.card.lift:hover{transform:translateY(-4px);border-color:var(--border-strong);box-shadow:0 16px 44px rgba(0,0,0,.4)}
.eyebrow{font-family:var(--font-mono);font-size:12px;font-weight:600;color:var(--accent);
  letter-spacing:.08em;text-transform:uppercase;display:inline-flex;align-items:center;gap:8px}
.eyebrow.muted{color:var(--dim)}
h1,h2,h3{font-family:var(--font-display);font-weight:700;letter-spacing:-.02em;line-height:1.1;text-transform:var(--display-transform)}
.lead{color:var(--muted);font-size:18px;line-height:1.6}

/* ── PILLS / BADGES ─────────────────────────────────────────── */
.pill{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:600;padding:4px 11px;border-radius:999px;font-family:var(--font-mono)}
[data-dir="a"] .pill{border-radius:3px}
.pill.accent{color:var(--accent);background:var(--accent-soft)}
.pill.good{color:var(--good);background:color-mix(in srgb,var(--good) 14%, transparent)}
.pill.warn{color:var(--warn);background:color-mix(in srgb,var(--warn) 14%, transparent)}
.pill.neutral{color:var(--muted);background:var(--elevated)}
.pill .pdot{width:6px;height:6px;border-radius:50%;background:currentColor}

/* ── PROGRESS BAR ───────────────────────────────────────────── */
.bar{height:7px;border-radius:999px;background:var(--elevated);overflow:hidden}
.bar > i{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,var(--accent),var(--accent-2))}

/* ============================================================
   THEME SWITCHER + SURFACE SWITCHER (shared control cluster)
   ============================================================ */
.ctrl-cluster{display:flex;align-items:center;gap:10px}
.surface-switch{display:flex;gap:2px;padding:3px;background:var(--panel-2);border:1px solid var(--border);border-radius:var(--radius-sm)}
.surface-switch a{display:flex;align-items:center;gap:6px;font-size:12.5px;font-weight:600;padding:5px 11px;border-radius:var(--radius-xs);
  color:var(--dim);font-family:var(--font-mono);transition:.15s}
.surface-switch a svg{width:14px;height:14px}
.surface-switch a:hover{color:var(--muted)}
.surface-switch a.on{background:var(--accent-soft);color:var(--accent)}

.theme-fab{position:relative}
.theme-btn{display:flex;align-items:center;gap:9px;height:40px;padding:0 13px;background:var(--panel-2);border:1px solid var(--border);
  border-radius:var(--radius-sm);color:var(--text);font-size:13px;font-weight:600;font-family:var(--font-mono);transition:.15s}
.theme-btn:hover{border-color:var(--border-strong)}
.theme-btn .swatch{width:16px;height:16px;border-radius:5px;background:linear-gradient(140deg,var(--accent),var(--accent-2));box-shadow:0 0 8px var(--accent-soft)}
[data-dir="a"] .theme-btn .swatch{border-radius:2px}
.theme-btn svg{width:15px;height:15px;color:var(--dim)}
.theme-menu{position:absolute;top:calc(100% + 8px);right:0;width:268px;background:var(--panel);border:1px solid var(--border-strong);
  border-radius:var(--radius);box-shadow:0 20px 60px rgba(0,0,0,.5);padding:8px;z-index:300;display:none}
[data-dir="c"] .theme-menu{backdrop-filter:var(--glass)}
.theme-menu.open{display:block;animation:menuIn .16s var(--ease)}
@keyframes menuIn{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:none}}
.theme-menu .tm-head{font-size:10.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--dim);font-weight:600;font-family:var(--font-mono);padding:8px 10px 6px}
.theme-opt{display:flex;align-items:center;gap:12px;padding:9px 10px;border-radius:var(--radius-sm);transition:.14s;width:100%;text-align:left}
.theme-opt:hover{background:var(--elevated)}
.theme-opt.on{background:var(--accent-soft)}
.theme-opt .dots{display:flex;gap:4px;flex-shrink:0}
.theme-opt .dots span{width:13px;height:13px;border-radius:4px}
[data-dir="a"] .theme-opt .dots span{border-radius:2px}
.theme-opt .tname{font-size:13.5px;font-weight:600;color:var(--text)}
.theme-opt .ttag{font-size:11px;color:var(--dim);margin-top:1px}
.theme-opt .chk{margin-left:auto;color:var(--accent);display:none}
.theme-opt.on .chk{display:block}
.theme-opt .chk svg{width:16px;height:16px}
.motion-seg{display:flex;gap:3px;padding:4px;margin:4px 2px 2px}
.motion-seg button{flex:1;display:flex;align-items:center;justify-content:center;gap:7px;font-family:var(--font-mono);font-size:12px;font-weight:600;
  padding:8px 10px;border-radius:var(--radius-xs,7px);color:var(--dim);background:var(--panel-2);border:1px solid var(--border);transition:.15s}
.motion-seg button svg{width:14px;height:14px}
.motion-seg button:hover{color:var(--muted)}
.motion-seg button.on{background:var(--accent-soft);color:var(--accent);border-color:color-mix(in srgb,var(--accent) 35%, transparent)}

/* capstone badge motion (course nodes orbit + pulse; ring counter-rotates) */
.ae-badge .cap-ring{transform-box:fill-box;transform-origin:center;animation:capSpinB 70s linear infinite}
.ae-badge .cap-orbit{transform-box:fill-box;transform-origin:center;animation:capSpin 96s linear infinite}
.ae-badge .cap-node{animation:capPulse 3.6s ease-in-out infinite}
@keyframes capSpin{to{transform:rotate(360deg)}}
@keyframes capSpinB{to{transform:rotate(-360deg)}}
@keyframes capPulse{0%,100%{opacity:.5}50%{opacity:1}}
@media(prefers-reduced-motion:reduce){.ae-badge .cap-ring,.ae-badge .cap-orbit,.ae-badge .cap-node{animation:none!important}}
html[data-motion="rolig"] .ae-badge .cap-ring,
html[data-motion="rolig"] .ae-badge .cap-orbit,
html[data-motion="rolig"] .ae-badge .cap-node{animation:none!important}

/* ============================================================
   STOREFRONT — HERO + SECTIONS
   ============================================================ */
.hero{padding:76px 0 56px;position:relative}
.hero h1{font-size:clamp(34px,5vw,60px);max-width:14ch}
.hero h1 .ac{color:var(--accent)}
.hero .lead{margin-top:20px;max-width:54ch}
.hero .cta-row{display:flex;gap:13px;margin-top:30px;flex-wrap:wrap}
.hero-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;margin-top:52px;background:var(--border);
  border:1px solid var(--border);border-radius:var(--panel-radius);overflow:hidden}
.hero-stats .hs{background:var(--panel);padding:20px 22px}
.hero-stats .hv{font-family:var(--font-num);font-size:27px;font-weight:700;letter-spacing:-.02em}
.hero-stats .hl{color:var(--dim);font-size:12.5px;margin-top:4px;font-family:var(--font-mono)}
@media(max-width:760px){.hero-stats{grid-template-columns:repeat(2,1fr)}}

.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
@media(max-width:900px){.feature-grid{grid-template-columns:1fr}}
.feature{padding:24px;position:relative;overflow:hidden}
.feature .fi{width:44px;height:44px;border-radius:12px;display:grid;place-items:center;background:var(--accent-soft);color:var(--accent);margin-bottom:16px}
[data-dir="a"] .feature .fi{border-radius:3px}
.feature .fi svg{width:22px;height:22px}
.feature h3{font-size:18px;margin-bottom:8px}
.feature p{color:var(--muted);font-size:14.5px}
.feature::after{content:"";position:absolute;left:0;right:0;top:0;height:2px;background:var(--accent);transform:scaleX(0);transform-origin:left;transition:transform .3s var(--ease)}
.feature.lift:hover::after{transform:scaleX(1)}

.course-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
@media(max-width:980px){.course-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:640px){.course-grid{grid-template-columns:1fr}}
.course{overflow:hidden;display:flex;flex-direction:column}
.course .ctop{height:7px}
.course .cbody{padding:20px;flex:1;display:flex;flex-direction:column}
.course .ctag{display:flex;justify-content:space-between;align-items:center;margin-bottom:13px}
.course h3{font-size:18px;margin-bottom:6px}
.course .cmeta{color:var(--dim);font-size:12.5px;font-family:var(--font-mono);margin-bottom:16px}
.course .cfoot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;padding-top:16px;border-top:1px solid var(--border)}
.course .cprice{font-family:var(--font-num);font-size:20px;font-weight:700}

.founder{display:grid;grid-template-columns:auto 1fr;gap:28px;align-items:center;padding:34px}
@media(max-width:760px){.founder{grid-template-columns:1fr;text-align:center}}
.founder .fimg{width:120px;height:148px;border-radius:14px;background:linear-gradient(160deg,var(--elevated),var(--panel-2));
  border:1px solid var(--border);display:grid;place-items:center;color:var(--dim);font-family:var(--font-mono);font-size:11px;flex-shrink:0;justify-self:center}
.founder blockquote{font-family:var(--font-display);font-size:23px;line-height:1.4;font-weight:600;letter-spacing:-.01em}
.founder .fby{color:var(--dim);font-size:13.5px;margin-top:14px;font-family:var(--font-mono)}

.cta-banner{text-align:center;padding:54px 30px;border-radius:var(--panel-radius);
  background:linear-gradient(150deg,color-mix(in srgb,var(--accent) 16%, var(--panel)),var(--panel));border:1px solid var(--border-strong)}
.cta-banner h2{font-size:clamp(26px,3.5vw,38px);margin-bottom:14px}
.cta-banner p{color:var(--muted);max-width:46ch;margin:0 auto 26px}

.site-footer{border-top:1px solid var(--border);padding:40px 0;color:var(--dim);font-size:13px}
.site-footer .frow{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;align-items:center}
.site-footer a{color:var(--muted)}.site-footer a:hover{color:var(--text)}

/* ============================================================
   APP — LEARNING SURFACE
   ============================================================ */
.app-grid{display:grid;grid-template-columns:1.6fr 1fr;gap:18px}
@media(max-width:980px){.app-grid{grid-template-columns:1fr}}
.kpi-row{display:grid;grid-template-columns:repeat(4,1fr);gap:13px}
@media(max-width:760px){.kpi-row{grid-template-columns:repeat(2,1fr)}}
.kpi{padding:16px 17px}
.kpi .kl{font-family:var(--font-mono);font-size:11.5px;color:var(--muted);letter-spacing:var(--label-spacing);text-transform:var(--label-transform);display:flex;align-items:center;gap:7px}
.kpi .kv{font-family:var(--font-num);font-size:25px;font-weight:700;letter-spacing:-.02em;margin-top:8px}
.kpi .ks{font-size:11.5px;color:var(--dim);margin-top:5px}
.panel-head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:16px 19px;border-bottom:1px solid var(--border)}
.panel-head h2,.panel-head h3{font-family:var(--font-display);font-size:15px;font-weight:600;display:flex;align-items:center;gap:9px;letter-spacing:-.01em}
.panel-head .lk{font-size:12.5px;color:var(--accent);font-family:var(--font-mono);display:flex;align-items:center;gap:4px}
.lesson{display:flex;align-items:center;gap:14px;padding:13px 19px;border-bottom:1px solid var(--border);transition:background .14s}
.lesson:last-child{border-bottom:none}
.lesson:hover{background:var(--panel-2)}
.lesson .lstate{width:26px;height:26px;border-radius:50%;display:grid;place-items:center;flex-shrink:0;font-family:var(--font-mono);font-size:11px}
[data-dir="a"] .lesson .lstate{border-radius:3px}
.lesson .lstate.done{background:var(--accent);color:var(--accent-ink)}
.lesson .lstate.done svg{width:14px;height:14px}
.lesson .lstate.now{background:var(--accent-soft);color:var(--accent);box-shadow:0 0 0 2px var(--accent-soft)}
.lesson .lstate.todo{background:var(--elevated);color:var(--dim)}
.lesson .ltitle{flex:1;min-width:0}
.lesson .ltitle b{font-weight:600;font-size:14px}
.lesson .ltitle span{color:var(--dim);font-size:12px;font-family:var(--font-mono);display:block;margin-top:1px}
.lesson .ltime{font-size:12px;color:var(--dim);font-family:var(--font-mono)}
.badge-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;padding:18px 19px}
.badge-i{aspect-ratio:1;border-radius:14px;display:grid;place-items:center;background:var(--panel-2);border:1px solid var(--border);position:relative}
[data-dir="a"] .badge-i{border-radius:4px}
.badge-i.earned{border-color:color-mix(in srgb,var(--accent) 40%, transparent);box-shadow:0 0 18px var(--accent-soft)}
.badge-i svg{width:26px;height:26px;color:var(--accent)}
.badge-i.locked svg{color:var(--dim)}
.continue{padding:24px;position:relative;overflow:hidden}
.continue .cv{position:relative;z-index:1}
.continue .clabel{font-family:var(--font-mono);font-size:12px;color:var(--accent);text-transform:uppercase;letter-spacing:.08em}
.continue h2{font-size:26px;margin:10px 0 6px}
.continue .cmeta{color:var(--muted);font-size:14px;margin-bottom:18px}

@media(prefers-reduced-motion:reduce){*{animation-duration:.01ms!important;transition-duration:.01ms!important}}