/* ScriptGrade public website.
   Fonts are self-hosted (SIL OFL, see fonts/LICENSE.txt).
   Light is the default theme; dark is chosen with the toggle in the header. */
@font-face{font-family:"Bricolage";src:url("/fonts/bricolage-grotesque.woff2") format("woff2");font-weight:200 800;font-display:swap}
@font-face{font-family:"Inter";src:url("/fonts/inter.woff2") format("woff2");font-weight:100 900;font-display:swap}
@font-face{font-family:"JetBrains Mono";src:url("/fonts/jetbrains-mono.woff2") format("woff2");font-weight:400;font-display:swap}

/* ---------- Theme tokens ---------- */
:root{
  --lime:#d4f36a;
  --lime-deep:#bfe34a;
  --on-lime:#0d1b24;
  --on-lime-soft:#3d4d12;
  --ink:#0d1b24;
  --blue:#4d9fff;
  --radius:18px;
  --display:"Bricolage",ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;
  --sans:"Inter",ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --mono:"JetBrains Mono",ui-monospace,"Cascadia Mono",Consolas,monospace;
  /* code editor stays dark in both themes */
  --code-window:#0f2231;
  --code-bg:#0a1823;
  --code-line:#233a4b;
  --code-text:#d7e2e9;
  --code-muted:#7f97a7;
}
:root,[data-theme="dark"]{
  color-scheme:dark;
  --bg:#0b1720;
  --bg-2:#0f1f2b;
  --surface:#132634;
  --surface-2:#18303f;
  --text:#eef3f6;
  --muted:#a2b3be;
  --line:#223949;
  --line-strong:#33506a;
  --kicker:#d4f36a;
  --soft:#7e93a1;
  --feature:#07121a;
  --feature-text:#eef3f6;
  --feature-muted:#a2b3be;
  --feature-line:#223949;
  --glass:rgba(11,23,32,.72);
  --glass-line:rgba(255,255,255,.1);
  --pill-bg:rgba(255,255,255,.06);
  --pill-active-bg:#ffffff;
  --pill-active-text:#0d1b24;
  --pass-bg:rgba(47,138,91,.2);--pass-fg:#7ee0a8;
  --fail-bg:rgba(200,71,47,.2);--fail-fg:#ffab97;
  --warn-bg:rgba(240,180,76,.16);--warn-fg:#f5c779;
  --violet-bg:rgba(143,128,255,.16);--violet-fg:#c1b8ff;
  --field-bg:#0f1f2b;
  --field-line:#2b465a;
  --grid-line:rgba(255,255,255,.045);
  --glow:rgba(212,243,106,.12);
  --shadow:0 30px 80px -30px rgba(0,0,0,.7);
  --hover-shadow:0 20px 40px -24px rgba(0,0,0,.8);
}
[data-theme="light"]{
  color-scheme:light;
  --bg:#f6f4ee;
  --bg-2:#fffdf8;
  --surface:#fffdf8;
  --surface-2:#f1efe7;
  --text:#14202a;
  --muted:#56626b;
  --line:#e2ded3;
  --line-strong:#c9c4b6;
  --kicker:#4c6414;
  --soft:#8a969e;
  --feature:#0d1b24;
  --feature-text:#ffffff;
  --feature-muted:#b6c4cd;
  --feature-line:#26404f;
  --glass:rgba(255,253,248,.8);
  --glass-line:rgba(13,27,36,.1);
  --pill-bg:rgba(13,27,36,.05);
  --pill-active-bg:#0d1b24;
  --pill-active-text:#ffffff;
  --pass-bg:#e2f3e9;--pass-fg:#1f7a4b;
  --fail-bg:#fbe7e2;--fail-fg:#b23d27;
  --warn-bg:#fff1d6;--warn-fg:#8c5a0e;
  --violet-bg:#ecebfb;--violet-fg:#4b3e9e;
  --field-bg:#ffffff;
  --field-line:#d5d1c5;
  --grid-line:rgba(13,27,36,.05);
  --glow:rgba(191,227,74,.28);
  --shadow:0 30px 80px -34px rgba(13,27,36,.35);
  --hover-shadow:0 18px 40px -24px rgba(13,27,36,.35);
  --blue:#1f5fa8;
}

/* ---------- Base ---------- */
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:96px;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--text);font:16px/1.65 var(--sans);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
h1,h2,h3{font-family:var(--display);line-height:1.06;letter-spacing:-.03em;margin:0;font-weight:700}
p{margin:0}
code,pre{font-family:var(--mono)}
svg{display:block}
::selection{background:var(--lime);color:var(--ink)}
:focus-visible{outline:3px solid var(--blue);outline-offset:3px;border-radius:6px}
[hidden]{display:none!important}

.container{width:min(100% - 40px,1200px);margin-inline:auto}
.section{padding-block:112px}
.skip-link{position:absolute;left:16px;top:-60px;z-index:100;background:var(--lime);color:var(--ink);padding:10px 16px;border-radius:8px;font-weight:700}
.skip-link:focus{top:12px}

.kicker{display:inline-flex;align-items:center;gap:10px;font:650 .76rem/1 var(--sans);letter-spacing:.14em;text-transform:uppercase;color:var(--kicker)}
.kicker .dot{width:8px;height:8px;border-radius:50%;background:#3fb37a;box-shadow:0 0 0 4px rgba(63,179,122,.2);animation:pulse 2.4s ease-in-out infinite}
@keyframes pulse{50%{box-shadow:0 0 0 8px rgba(63,179,122,0)}}
.section-head{max-width:760px;margin-bottom:56px}
.section-head h2,.roles-intro h2,.class-copy h2,.honest h2,.faq h2,.students h2,.contact h2{font-size:clamp(2.2rem,4.4vw,3.6rem);margin-top:18px}
.section-sub{margin-top:20px;font-size:1.1rem;color:var(--muted);max-width:640px}
.soft{color:var(--soft)}
.link{color:var(--blue);text-decoration:underline;text-underline-offset:3px}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:52px;padding:0 24px;border-radius:999px;border:1px solid transparent;font-weight:650;font-size:.98rem;cursor:pointer;transition:transform .18s ease,background-color .18s,border-color .18s,color .18s}
.btn:hover{transform:translateY(-2px)}
.btn:active{transform:none}
.btn span{transition:transform .18s}
.btn:hover span{transform:translateX(3px)}
.btn-lime{background:var(--lime);color:var(--on-lime)}
.btn-lime:hover{background:var(--lime-deep)}
.btn-ghost{border-color:var(--line-strong);color:var(--text);background:transparent}
.btn-ghost:hover{border-color:var(--text)}
.btn-dark{background:var(--ink);color:#fff}
.btn-dark:hover{background:#1c3446}
.btn-block{width:100%}

/* ---------- Header: floating pill nav ---------- */
.site-header{position:fixed;inset:0 0 auto;z-index:60;padding:14px 20px;pointer-events:none;transition:padding .3s ease}
.nav{pointer-events:auto;position:relative;width:min(100%,1200px);margin-inline:auto;height:64px;display:flex;align-items:center;justify-content:space-between;gap:20px;padding:0 10px 0 20px;border-radius:999px;border:1px solid transparent;color:var(--text);transition:background-color .3s,border-color .3s,box-shadow .3s,height .3s,width .3s}
.site-header.scrolled{padding-top:10px}
.site-header.scrolled .nav{width:min(100%,1100px);height:58px;background:var(--glass);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-color:var(--glass-line);box-shadow:0 18px 50px -24px rgba(0,0,0,.5)}
.brand{display:inline-flex;align-items:center;gap:11px;flex:none}
.brand-word{font:700 1.3rem/1 var(--display);letter-spacing:-.04em}
.brand-mark{position:relative;width:32px;height:32px;border-radius:9px;background:var(--lime);transform:rotate(-8deg);flex:none;transition:transform .3s}
.brand:hover .brand-mark{transform:rotate(0)}
.brand-mark i{position:absolute;left:7px;height:4px;border-radius:4px;background:var(--ink);transform:rotate(-14deg)}
.brand-mark i:nth-child(1){top:8px;width:18px}
.brand-mark i:nth-child(2){top:14px;width:14px;left:9px}
.brand-mark i:nth-child(3){top:20px;width:9px;left:11px}
.nav-links{display:flex;align-items:center;gap:2px;padding:4px;border-radius:999px;background:var(--pill-bg);border:1px solid var(--glass-line)}
.nav-links a{padding:8px 16px;border-radius:999px;font-size:.9rem;font-weight:550;color:var(--muted);transition:color .15s,background-color .2s}
.nav-links a:hover{color:var(--text)}
.nav-links a.active{color:var(--pill-active-text);background:var(--pill-active-bg)}
.nav-links .nav-cta-sheet{display:none}
.nav-actions{display:flex;align-items:center;gap:8px}
.nav-cta{display:inline-flex;align-items:center;gap:8px;padding:11px 20px;border-radius:999px;background:var(--lime);color:var(--on-lime);font-weight:650;font-size:.92rem;transition:background-color .15s,transform .15s}
.nav-cta:hover{background:var(--lime-deep);transform:translateY(-1px)}
.theme-toggle{display:grid;place-items:center;width:44px;height:44px;border-radius:50%;border:1px solid var(--glass-line);background:var(--pill-bg);color:var(--text);cursor:pointer;transition:background-color .2s,transform .3s}
.theme-toggle:hover{transform:rotate(15deg)}
.theme-toggle svg{width:19px;height:19px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
[data-theme="dark"] .i-moon,[data-theme="light"] .i-sun{display:none}
.menu-toggle{display:none}
body.menu-open{overflow:hidden}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;padding:176px 0 120px;isolation:isolate;border-bottom:1px solid var(--line)}
.hero::before{content:"";position:absolute;inset:0;z-index:-1;background-image:linear-gradient(var(--grid-line) 1px,transparent 1px),linear-gradient(90deg,var(--grid-line) 1px,transparent 1px);background-size:44px 44px;mask-image:radial-gradient(ellipse 80% 70% at 70% 40%,#000 30%,transparent 75%);-webkit-mask-image:radial-gradient(ellipse 80% 70% at 70% 40%,#000 30%,transparent 75%)}
.hero::after{content:"";position:absolute;z-index:-1;width:760px;height:760px;right:-200px;top:-240px;border-radius:50%;background:radial-gradient(circle,var(--glow),transparent 62%)}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);gap:72px;align-items:center}
.hero-copy{min-width:0}
.hero h1{font-size:clamp(2.8rem,5vw,4.9rem);margin:24px 0 26px;letter-spacing:-.04em;line-height:1.02}
.hero h1 .hl{color:var(--kicker);background:linear-gradient(currentColor,currentColor) no-repeat 0 94%/0% .07em;-webkit-box-decoration-break:clone;box-decoration-break:clone;animation:underline 1s .5s cubic-bezier(.2,.8,.2,1) forwards}
@keyframes underline{to{background-size:100% .07em}}
.lead{font-size:1.14rem;line-height:1.7;color:var(--muted);max-width:560px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:36px}
.hero-facts{list-style:none;margin:52px 0 0;padding:28px 0 0;border-top:1px solid var(--line);display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.hero-facts li{display:grid;gap:8px;align-content:start}
.hero-facts b{font:700 2.2rem/1 var(--display);color:var(--text)}
.hero-facts span{font-size:.86rem;line-height:1.45;color:var(--muted);max-width:180px}

/* Hero: live marking demo (always dark, like a real code editor) */
.runner{margin:0;position:relative;min-width:0}
.runner-window{background:var(--code-window);border:1px solid var(--code-line);border-radius:20px;box-shadow:0 40px 110px -40px rgba(0,0,0,.75);overflow:hidden;color:var(--code-text)}
.runner-bar{display:flex;align-items:center;gap:12px;padding:14px 18px;border-bottom:1px solid var(--code-line);font-size:.8rem;color:#b3c3cd}
.traffic{display:flex;gap:6px}.traffic i{width:10px;height:10px;border-radius:50%;background:#2e4556}
.runner-title{flex:1;font-weight:550;min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.runner-marks{background:rgba(212,243,106,.12);color:var(--lime);padding:4px 10px;border-radius:999px;font-weight:650;font-size:.74rem;white-space:nowrap}
.runner-q{padding:16px 20px 4px;font-size:.93rem;color:#dbe4ea}
.runner-q code{background:rgba(255,255,255,.07);padding:2px 6px;border-radius:5px;font-size:.86em;color:#fff}
.runner-tabs{display:flex;gap:6px;padding:12px 20px 0}
.runner-tabs button{border:1px solid var(--code-line);background:transparent;color:#9fb0bb;border-radius:999px;padding:7px 14px;font-size:.8rem;font-weight:600;cursor:pointer;transition:all .15s}
.runner-tabs button:hover{color:#fff;border-color:#4a6378}
.runner-tabs button[aria-selected="true"]{background:#fff;color:var(--ink);border-color:#fff}
.runner-tabs button[data-answer="bug"][aria-selected="true"]{background:#c8472f;border-color:#c8472f;color:#fff}
.code{margin:14px 20px 0;padding:16px 18px;background:var(--code-bg);border-radius:12px;font-size:.86rem;line-height:1.75;color:var(--code-text);overflow-x:auto;white-space:pre}
.code .ln{display:inline-block;width:1.6em;margin-right:14px;color:#4b6475;text-align:right;user-select:none}
.code .k{color:#c7a6ff}.code .f{color:#8fd4ff}
.swap{border-radius:4px;padding:1px 3px;margin:-1px -3px;transition:background-color .3s,color .3s}
.runner.is-bug .swap{background:rgba(200,71,47,.3);color:#ffb6a6}
.tests{padding:16px 20px 20px}
.tests-head{display:flex;justify-content:space-between;align-items:center;gap:10px;font-size:.72rem;text-transform:uppercase;letter-spacing:.1em;color:var(--code-muted);font-weight:650;margin-bottom:10px}
.tests-lock{display:inline-flex;align-items:center;gap:6px;text-transform:none;letter-spacing:0;font-weight:550;background:rgba(255,255,255,.05);padding:3px 9px;border-radius:999px;white-space:nowrap}
.tests-lock::before{content:"";width:8px;height:9px;border:2px solid currentColor;border-radius:2px 2px 3px 3px;border-top-width:4px}
.test-list{list-style:none;margin:0;padding:0;display:grid;gap:6px}
.test-list li{display:grid;grid-template-columns:1fr auto 88px;align-items:center;gap:10px;padding:9px 12px;border-radius:9px;background:rgba(255,255,255,.035);font-size:.82rem;transition:background-color .3s}
.test-list code{color:#dbe4ea;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.test-list .exp{color:var(--code-muted);font-family:var(--mono);font-size:.8rem}
.test-list .res{justify-self:end;font-weight:650;font-size:.76rem;padding:3px 9px;border-radius:999px;opacity:0;transform:scale(.8);transition:opacity .25s,transform .25s;white-space:nowrap}
.test-list li.pass .res{opacity:1;transform:none;background:rgba(47,138,91,.22);color:#7ee0a8}
.test-list li.fail{background:rgba(200,71,47,.12)}
.test-list li.fail .res{opacity:1;transform:none;background:rgba(200,71,47,.26);color:#ffb6a6}
.test-list li.running .res{opacity:1;transform:none;color:#9fb0bb}
.score{display:grid;grid-template-columns:auto 1fr;align-items:center;gap:6px 14px;margin-top:14px;padding-top:14px;border-top:1px solid var(--code-line)}
.score-label{font-size:.74rem;color:var(--code-muted);font-weight:650;text-transform:uppercase;letter-spacing:.1em}
.score-value{justify-self:end;font:700 1.6rem/1 var(--display);color:#fff;letter-spacing:-.02em}
.score-bar{grid-column:1/-1;height:6px;background:rgba(255,255,255,.07);border-radius:6px;overflow:hidden}
.score-bar i{display:block;height:100%;width:100%;background:var(--lime);border-radius:6px;transition:width .6s cubic-bezier(.2,.8,.2,1),background-color .3s}
.runner.is-bug .score-bar i{background:#f0b44c}
.runner figcaption{margin-top:14px;font-size:.82rem;color:var(--muted);text-align:center}

/* ---------- Problem ---------- */
.problem{background:var(--bg-2);border-bottom:1px solid var(--line)}
.problem .section-head{max-width:900px;margin-bottom:48px}
.big-stat{display:grid;grid-template-columns:1fr auto 1fr;border:1px solid var(--line);border-radius:24px;overflow:hidden;background:var(--surface)}
.bs-side{padding:36px 40px;display:flex;flex-direction:column;gap:12px}
.bs-good{background:var(--lime);color:var(--on-lime)}
.bs-label{font-size:.76rem;text-transform:uppercase;letter-spacing:.14em;font-weight:650;color:var(--muted)}
.bs-good .bs-label{color:var(--on-lime-soft)}
.bs-num{font:700 clamp(3.4rem,7vw,5.8rem)/.95 var(--display);letter-spacing:-.05em}
.bs-num small{font-size:.3em;letter-spacing:-.01em;margin-left:10px;font-weight:600;color:var(--muted)}
.bs-text{font-size:clamp(2.2rem,4vw,3.4rem);line-height:1;max-width:340px}
.bs-note{font-size:.92rem;color:var(--muted);margin-top:auto}
.bs-good .bs-note{color:var(--on-lime-soft)}
.bs-vs{display:grid;place-items:center;padding:0 18px;font:700 .95rem var(--display);color:var(--soft);border-inline:1px solid var(--line)}
.problem-grid{margin-top:16px;display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.problem-grid article{padding:28px;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);display:flex;flex-direction:column}
.p-num{font:600 .8rem var(--mono);color:var(--kicker)}
.problem-grid h3{font-size:1.4rem;margin:14px 0 10px}
.problem-grid p{color:var(--muted);font-size:.96rem}
.problem-grid p:not(.p-fix){margin-bottom:18px}
.problem-grid .p-fix{margin-top:auto;padding-top:18px;border-top:1px solid var(--line);color:var(--text);font-weight:550;display:flex;gap:10px}
.problem-grid .p-fix::before{content:"→";color:var(--kicker)}

/* ---------- Exams bento ---------- */
.bento{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.tile{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:28px;display:flex;flex-direction:column;gap:12px;transition:transform .2s ease,box-shadow .2s ease,border-color .2s}
.tile:hover{transform:translateY(-3px);box-shadow:var(--hover-shadow);border-color:var(--line-strong)}
.tile h3{font-size:1.3rem}
.tile p{color:var(--muted);font-size:.96rem}
.tile-wide{grid-column:span 2;display:grid;grid-template-columns:1fr 1fr;gap:32px;align-items:center}
.tile-copy{display:flex;flex-direction:column;gap:12px}
.tile-dark{background:var(--feature);border-color:var(--feature-line);color:var(--feature-text)}
.tile-dark p{color:var(--feature-muted)}
.tile-lime{background:var(--lime);border-color:var(--lime-deep);color:var(--on-lime)}
.tile-lime p{color:var(--on-lime-soft)}
.tile-lime:hover{border-color:var(--lime-deep)}
.mini-tests{display:grid;gap:8px}
.mt-row{display:grid;grid-template-columns:74px 1fr auto;align-items:center;gap:10px;padding:10px 12px;border-radius:10px;background:rgba(255,255,255,.05);font-size:.8rem}
.mt-row span{color:#7f97a7;font-weight:600}
.mt-row code{font-size:.8rem;color:#e0e8ee;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.mt-row:not(.mt-vis) code{filter:blur(3.5px);user-select:none}
.mt-row em{font-style:normal;font-size:.72rem;font-weight:650;padding:2px 8px;border-radius:999px;background:rgba(255,255,255,.08);color:#b6c4cd}
.mt-vis em{background:rgba(212,243,106,.16);color:var(--lime)}
.chips{list-style:none;margin:auto 0 0;padding:6px 0 0;display:flex;flex-wrap:wrap;gap:6px}
.chips li{font-size:.8rem;font-weight:600;padding:6px 11px;border-radius:999px;background:var(--surface-2);border:1px solid var(--line)}
.modes{display:grid;gap:8px;margin-top:4px}
.modes div{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:11px 14px;border-radius:10px;border:1px solid var(--line);font-size:.9rem}
.modes div:first-child{border-color:var(--pass-fg);background:var(--pass-bg)}
.modes span{color:var(--muted);font-size:.8rem;text-align:right}
.signin-mock{background:#fff;color:#14202a;border-radius:14px;padding:20px;box-shadow:0 20px 40px -24px rgba(52,68,12,.6);display:grid;gap:10px}
.signin-mock label{display:grid;gap:4px;font-size:.7rem;font-weight:650;color:#56626b;text-transform:uppercase;letter-spacing:.06em}
.signin-mock label span{font:500 .92rem var(--mono);color:#14202a;text-transform:none;letter-spacing:0;border:1px solid #e2ded3;border-radius:8px;padding:9px 12px}
.signin-mock b{margin-top:4px;background:var(--ink);color:#fff;text-align:center;padding:11px;border-radius:999px;font-size:.9rem}
.pause-mock{margin-top:auto;display:flex;align-items:center;gap:12px;padding:14px;border-radius:12px;background:var(--warn-bg);color:var(--warn-fg)}
.pause-mock b{display:block;font-size:.9rem}
.pause-mock small{font-size:.8rem;opacity:.85}
.pm-icon{flex:none;display:grid;place-items:center;width:34px;height:34px;border-radius:9px;background:var(--warn-fg);color:var(--bg);font-size:.7rem;letter-spacing:-1px}
.note-band{margin-top:16px;display:flex;gap:18px;align-items:flex-start;padding:24px 28px;border-radius:var(--radius);background:var(--surface-2);border:1px solid var(--line)}
.note-icon{flex:none;display:grid;place-items:center;width:40px;height:40px;border-radius:10px;background:var(--lime);color:var(--ink);font-size:1.2rem}
.note-band p{color:var(--muted)}
.note-band b{color:var(--text)}

/* ---------- Timeline ---------- */
.how{background:var(--bg-2);border-block:1px solid var(--line)}
.timeline{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(4,1fr);position:relative}
.timeline::before{content:"";position:absolute;left:25px;right:calc(25% - 25px);top:25px;height:2px;background:repeating-linear-gradient(90deg,var(--line-strong) 0 8px,transparent 8px 14px)}
.timeline li{position:relative;padding-right:32px}
.t-step{position:relative;z-index:1;display:grid;place-items:center;width:50px;height:50px;border-radius:50%;background:var(--lime);color:var(--ink);font:700 1.2rem var(--display);box-shadow:0 0 0 8px var(--bg-2)}
.t-who{margin-top:26px;font-size:.74rem;text-transform:uppercase;letter-spacing:.12em;font-weight:650;color:var(--kicker)}
.timeline h3{font-size:1.3rem;margin:8px 0 10px}
.timeline p:not(.t-who){color:var(--muted);font-size:.95rem}

/* ---------- Roles ---------- */
.roles-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:64px;align-items:center}
.role-tabs{margin-top:34px;display:flex;flex-direction:column;gap:8px;max-width:380px}
.role-tabs button{display:flex;justify-content:space-between;align-items:center;text-align:left;padding:16px 20px;border-radius:14px;border:1px solid var(--line);background:var(--surface);color:var(--text);font-weight:650;font-size:1.02rem;cursor:pointer;transition:all .15s}
.role-tabs button::after{content:"→";opacity:.3;transition:opacity .15s,transform .15s}
.role-tabs button:hover{border-color:var(--line-strong)}
.role-tabs button[aria-selected="true"]{background:var(--lime);color:var(--on-lime);border-color:var(--lime)}
.role-tabs button[aria-selected="true"]::after{opacity:1;transform:translateX(3px)}
.role-panels{background:var(--feature);color:var(--feature-text);border:1px solid var(--feature-line);border-radius:24px;padding:48px;min-height:400px;position:relative;overflow:hidden}
.role-panels::after{content:"";position:absolute;right:-120px;bottom:-120px;width:320px;height:320px;border-radius:50%;background:radial-gradient(circle,rgba(212,243,106,.16),transparent 65%)}
.role-panel{position:relative;z-index:1;animation:fade .35s ease}
@keyframes fade{from{opacity:0;transform:translateY(6px)}}
.role-tag{display:inline-block;font-size:.74rem;font-weight:650;letter-spacing:.12em;text-transform:uppercase;color:var(--lime);margin-bottom:14px}
.role-panel h3{font-size:clamp(1.7rem,3vw,2.3rem);max-width:460px}
.ticks{list-style:none;margin:28px 0 0;padding:0;display:grid;gap:14px}
.ticks li{position:relative;padding-left:34px}
.ticks li::before{content:"";position:absolute;left:0;top:.2em;width:22px;height:22px;border-radius:50%;background:var(--pass-bg) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%233fb37a' stroke-width='3.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 12.5l4 4 8-9'/%3E%3C/svg%3E") center/13px no-repeat}
.role-panels .ticks li{color:var(--feature-muted)}
.role-panels .ticks li::before{background-color:rgba(212,243,106,.14);background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23d4f36a' stroke-width='3.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 12.5l4 4 8-9'/%3E%3C/svg%3E")}

/* ---------- Classroom ---------- */
.classroom{background:var(--bg-2);border-block:1px solid var(--line)}
.class-grid{display:grid;grid-template-columns:1fr 1.05fr;gap:72px;align-items:center}
.class-copy .ticks{margin-top:30px}
.trial{margin-top:32px;padding:20px 22px;border-radius:var(--radius);border:1px dashed var(--line-strong);background:var(--surface);display:grid;gap:10px;justify-items:start}
.trial-badge{background:var(--lime);color:var(--ink);font-size:.76rem;font-weight:700;padding:5px 11px;border-radius:999px}
.trial p{color:var(--muted);font-size:.95rem}
.class-mock{display:grid;grid-template-columns:120px 1fr;background:var(--surface);border:1px solid var(--line);border-radius:22px;overflow:hidden;box-shadow:var(--shadow);font-size:.86rem;min-height:430px}
.cm-side{background:var(--feature);padding:18px 12px;display:flex;flex-direction:column;gap:6px;border-right:1px solid var(--line)}
.cm-logo{width:30px;height:30px;border-radius:8px;background:var(--lime);color:var(--ink);display:grid;place-items:center;font:800 .9rem var(--display);margin:0 0 16px 6px}
.cm-class{color:#9fb0bb;padding:9px 10px;border-radius:8px;font-weight:600;font-size:.8rem}
.cm-class.active{background:rgba(255,255,255,.09);color:#fff}
.cm-main{padding:22px}
.cm-top{display:flex;justify-content:space-between;align-items:center;gap:10px}
.cm-top b{font:700 1.08rem var(--display)}
.cm-top span{font-size:.76rem;color:var(--muted);border:1px solid var(--line);padding:4px 10px;border-radius:999px;white-space:nowrap}
.cm-tabs{display:flex;gap:18px;margin:16px 0;border-bottom:1px solid var(--line)}
.cm-tabs span{padding:8px 0;color:var(--muted);font-weight:600;font-size:.82rem}
.cm-tabs .on{color:var(--text);box-shadow:inset 0 -2px 0 var(--kicker)}
.cm-due{display:flex;gap:10px;align-items:center;background:var(--warn-bg);color:var(--warn-fg);padding:10px 12px;border-radius:10px;font-size:.8rem;margin-bottom:12px}
.cm-card{display:flex;align-items:center;gap:12px;padding:13px;border:1px solid var(--line);border-radius:12px;margin-bottom:9px;background:var(--bg-2)}
.cm-card div{flex:1;min-width:0}
.cm-card b{display:block;font-size:.86rem}
.cm-card small{color:var(--muted);font-size:.76rem}
.ic{flex:none;width:34px;height:34px;border-radius:9px;display:grid;place-items:center;font-style:normal}
.ic-a{background:var(--violet-bg);color:var(--violet-fg)}.ic-n{background:var(--pass-bg);color:var(--pass-fg)}
.st{font-style:normal;font-size:.72rem;font-weight:650;padding:4px 9px;border-radius:999px;white-space:nowrap}
.st-todo{background:var(--warn-bg);color:var(--warn-fg)}.st-done{background:var(--pass-bg);color:var(--pass-fg)}

/* ---------- Honest ---------- */
.honest-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:64px;align-items:start}
.honest-list{list-style:none;margin:0;padding:0;display:grid;gap:12px}
.honest-list li{position:relative;padding:22px 24px 22px 62px;background:var(--surface);border:1px solid var(--line);border-radius:16px;color:var(--muted)}
.honest-list li::before{content:"";position:absolute;left:22px;top:24px;width:24px;height:24px;border-radius:50%;background:var(--fail-bg) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23e0654a' stroke-width='3' stroke-linecap='round'%3E%3Cpath d='M8 8l8 8M16 8l-8 8'/%3E%3C/svg%3E") center/12px no-repeat}
.honest-list b{color:var(--text)}

/* ---------- Pricing ---------- */
.pricing{background:var(--bg-2);border-block:1px solid var(--line)}
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.price-card{padding:30px;border-radius:var(--radius);border:1px solid var(--line);background:var(--surface);display:flex;flex-direction:column;gap:12px}
.pc-tag{align-self:flex-start;font-size:.7rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;padding:5px 10px;border-radius:999px;background:var(--violet-bg);color:var(--violet-fg)}
.pc-tag.pc-exam{background:var(--pass-bg);color:var(--pass-fg)}
.price-card h3{font-size:1.45rem;margin-top:6px}
.price-card p{color:var(--muted);font-size:.96rem}
.price-foot{margin-top:16px;display:flex;justify-content:space-between;align-items:center;gap:24px;flex-wrap:wrap;padding:26px 30px;border-radius:var(--radius);background:var(--lime);color:var(--on-lime)}
.price-foot p{color:var(--on-lime-soft);font-size:1.05rem;max-width:560px}
.price-foot b{color:var(--on-lime)}
.fine{margin-top:14px;font-size:.84rem;color:var(--muted)}

/* ---------- Getting started ---------- */
.flow{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(5,1fr);gap:14px}
.flow li{position:relative;padding:26px 22px;border-radius:var(--radius);border:1px solid var(--line);background:var(--surface)}
.flow li:last-child{background:var(--lime);border-color:var(--lime);color:var(--on-lime)}
.flow li:not(:last-child)::after{content:"";position:absolute;right:-11px;top:38px;width:8px;height:8px;border-top:2px solid var(--line-strong);border-right:2px solid var(--line-strong);transform:rotate(45deg);z-index:1}
.flow span{font:600 .8rem var(--mono);color:var(--kicker)}
.flow li:last-child span{color:var(--on-lime-soft)}
.flow h3{font-size:1.22rem;margin:12px 0 8px}
.flow p{font-size:.9rem;color:var(--muted)}
.flow li:last-child p{color:var(--on-lime-soft)}
.flow-note{margin-top:28px;display:flex;gap:12px;align-items:center;color:var(--muted);font-size:.96rem}
.flow-note::before{content:"";flex:none;width:34px;height:34px;border-radius:9px;background:var(--lime) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%230d1b24' stroke-width='2.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Crect x='5' y='11' width='14' height='9' rx='2'/%3E%3Cpath d='M8 11V8a4 4 0 0 1 8 0v3'/%3E%3C/svg%3E") center/18px no-repeat}

/* ---------- Students ---------- */
.students{padding-top:0}
.students-card{display:grid;grid-template-columns:1.2fr .8fr;gap:48px;align-items:center;padding:56px;border-radius:28px;background:var(--surface);border:1px solid var(--line)}
.students-text{margin-top:18px;color:var(--muted);font-size:1.05rem;max-width:560px}
.students h2{font-size:clamp(2rem,3.6vw,2.9rem)}
.mail-note{margin-top:22px;display:flex;gap:14px;align-items:flex-start;padding:16px 18px;border-radius:14px;background:var(--surface-2);border:1px solid var(--line);max-width:560px}
.mail-note p{color:var(--muted);font-size:.95rem}
.mail-note b{color:var(--text)}
.mail-icon{flex:none;display:grid;place-items:center;width:34px;height:34px;border-radius:9px;background:var(--lime);color:var(--ink);font-size:1rem}
.download{padding:28px;border-radius:20px;background:var(--bg-2);border:1px dashed var(--line-strong);display:grid;gap:10px;justify-items:start}
.dl-icon{width:44px;height:44px;border-radius:12px;display:grid;place-items:center;background:var(--surface-2);color:var(--muted);font-size:1.3rem}
.download h3{font-size:1.22rem}
.download p{color:var(--muted);font-size:.92rem}
.dl-status{margin-top:4px;font-size:.78rem;font-weight:650;padding:6px 12px;border-radius:999px;background:var(--surface-2);color:var(--muted)}

/* ---------- FAQ ---------- */
.faq{background:var(--bg-2);border-top:1px solid var(--line)}
.faq-grid{display:grid;grid-template-columns:.75fr 1.25fr;gap:64px;align-items:start}
.faq-list{border-top:1px solid var(--line)}
.faq-list details{border-bottom:1px solid var(--line)}
.faq-list summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:20px;padding:22px 2px;font:650 1.06rem/1.35 var(--sans)}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list summary::after{content:"";flex:none;width:30px;height:30px;border-radius:50%;border:1px solid var(--line-strong);background:linear-gradient(var(--text),var(--text)) center/12px 2px no-repeat,linear-gradient(var(--text),var(--text)) center/2px 12px no-repeat;transition:transform .2s,background-color .2s}
.faq-list details[open] summary::after{transform:rotate(45deg);background-color:var(--lime);border-color:var(--lime);background-image:linear-gradient(var(--ink),var(--ink)),linear-gradient(var(--ink),var(--ink))}
.faq-list details p{padding:0 48px 22px 2px;color:var(--muted)}

/* ---------- Contact ---------- */
.contact{position:relative;overflow:hidden;border-top:1px solid var(--line)}
.contact::before{content:"";position:absolute;left:-200px;bottom:-260px;width:620px;height:620px;border-radius:50%;background:radial-gradient(circle,var(--glow),transparent 62%)}
.contact-grid{position:relative;display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.contact-text{margin-top:20px;color:var(--muted);font-size:1.08rem;max-width:520px}
.contact-email{margin-top:32px;padding:22px 24px;border-radius:16px;border:1px solid var(--line);background:var(--surface);max-width:520px;display:grid;gap:6px}
.contact-email span{font-size:.72rem;font-weight:650;text-transform:uppercase;letter-spacing:.12em;color:var(--kicker)}
.contact-email a{font:700 clamp(1.3rem,2.6vw,1.7rem)/1.2 var(--display);letter-spacing:-.02em;color:var(--text);text-decoration:underline;text-decoration-color:var(--lime-deep);text-decoration-thickness:3px;text-underline-offset:6px;word-break:break-word}
.contact-email a:hover{text-decoration-color:currentColor}
.contact-email p{margin-top:6px;color:var(--muted);font-size:.93rem}
.form-actions{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.enquiry{background:var(--surface);border:1px solid var(--line);border-radius:24px;padding:34px;display:grid;gap:16px;box-shadow:var(--shadow)}
.enquiry h3{font-size:1.45rem}
.field{display:grid;gap:7px;min-width:0;border:0;margin:0;padding:0}
.field label,.field legend{font-size:.84rem;font-weight:600;padding:0}
.field legend{margin-bottom:7px}
.field input{width:100%;min-height:48px;padding:0 14px;border-radius:11px;border:1px solid var(--field-line);background:var(--field-bg);font-size:1rem;transition:border-color .15s,box-shadow .15s}
.field input::placeholder{color:var(--soft)}
.field input:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 4px rgba(77,159,255,.18)}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.checks{display:flex;flex-wrap:wrap;gap:10px}
.checks label{display:inline-flex;align-items:center;gap:9px;padding:11px 14px;border:1px solid var(--field-line);border-radius:11px;background:var(--field-bg);cursor:pointer;font-weight:550;font-size:.93rem}
.checks label:has(input:checked){border-color:var(--kicker);box-shadow:inset 0 0 0 1px var(--kicker)}
.checks input{width:18px;height:18px;accent-color:var(--lime-deep);margin:0}
.preview{padding:16px 18px;border-radius:12px;background:var(--surface-2);border:1px solid var(--line)}
.preview span{font-size:.72rem;font-weight:650;text-transform:uppercase;letter-spacing:.1em;color:var(--kicker)}
.preview p{margin-top:6px;font-size:.93rem;color:var(--text)}
.copy-status{min-height:1.4em;font-size:.88rem;color:var(--pass-fg);font-weight:550;text-align:center}

/* ---------- Footer ---------- */
.site-footer{background:var(--bg-2);border-top:1px solid var(--line);padding-top:72px}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:48px;padding-bottom:56px}
.foot-brand p{margin-top:18px;color:var(--muted);max-width:340px;font-size:.93rem}
.site-footer nav{display:flex;flex-direction:column;gap:12px;font-size:.94rem}
.site-footer nav span{font-size:.72rem;text-transform:uppercase;letter-spacing:.14em;color:var(--soft);font-weight:650;margin-bottom:4px}
.site-footer nav a{color:var(--muted)}
.site-footer nav a:hover,.foot-bottom a:hover{color:var(--text)}
.foot-bottom{display:flex;justify-content:space-between;gap:16px;padding-block:22px;border-top:1px solid var(--line);font-size:.86rem;color:var(--soft)}

/* ---------- Reveal on scroll (only when JS runs) ---------- */
.js .reveal{opacity:0;transform:translateY(10px);transition:opacity .35s ease-out,transform .35s ease-out}
.js .reveal.in{opacity:1;transform:none}

/* ---------- Responsive ---------- */
@media (max-width:1080px){
  .hero-grid{grid-template-columns:1fr;gap:56px}
  .hero-copy{max-width:720px}
  .runner{max-width:640px}
  .bento{grid-template-columns:repeat(2,1fr)}
  .timeline{grid-template-columns:repeat(2,1fr);row-gap:44px}
  .timeline::before{display:none}
  .flow{grid-template-columns:repeat(3,1fr)}
  .flow li::after{display:none}
  .roles-grid,.class-grid,.honest-grid,.faq-grid,.contact-grid{gap:48px}
}
@media (max-width:980px){
  .nav-links a{padding:8px 11px}
}
@media (max-width:860px){
  .section{padding-block:84px}
  .site-header{padding:10px 12px}
  .nav{padding:0 6px 0 16px;height:58px}
  .site-header.scrolled .nav{width:100%}
  .nav-actions .nav-cta{display:none}
  .menu-toggle{display:grid;place-items:center;width:44px;height:44px;border-radius:50%;border:1px solid var(--glass-line);background:var(--pill-bg);color:var(--text);cursor:pointer}
  .menu-bars{position:relative;width:18px;height:2px;background:currentColor;border-radius:2px;transition:background-color .2s}
  .menu-bars::before,.menu-bars::after{content:"";position:absolute;left:0;width:18px;height:2px;background:currentColor;border-radius:2px;transition:transform .25s}
  .menu-bars::before{top:-6px}.menu-bars::after{top:6px}
  .menu-toggle[aria-expanded="true"] .menu-bars{background:transparent}
  .menu-toggle[aria-expanded="true"] .menu-bars::before{transform:translateY(6px) rotate(45deg)}
  .menu-toggle[aria-expanded="true"] .menu-bars::after{transform:translateY(-6px) rotate(-45deg)}
  .site-header.menu-shown .nav{background:var(--bg);border-color:var(--glass-line)}
  .nav-links{position:fixed;left:12px;right:12px;top:78px;flex-direction:column;align-items:stretch;gap:4px;padding:14px;border-radius:24px;background:var(--bg);border:1px solid var(--glass-line);box-shadow:0 30px 80px -20px rgba(0,0,0,.6);opacity:0;visibility:hidden;transform:translateY(-8px) scale(.98);transform-origin:top center;transition:opacity .2s,transform .2s,visibility 0s .2s}
  .nav-links.open{opacity:1;visibility:visible;transform:none;transition:opacity .2s,transform .2s}
  .nav-links a{padding:16px;font:600 1.3rem/1.1 var(--display);letter-spacing:-.02em;color:var(--text);border-radius:14px}
  .nav-links a.active{background:var(--surface);color:var(--kicker)}
  .nav-links .nav-cta-sheet{display:flex;justify-content:center;margin-top:8px;padding:16px;font:650 1.02rem var(--sans);background:var(--lime);color:var(--on-lime)}
  .hero{padding:128px 0 84px}
  .big-stat{grid-template-columns:1fr}
  .bs-vs{padding:10px;border-inline:0;border-block:1px solid var(--line)}
  .problem-grid{grid-template-columns:1fr}
  .roles-grid,.class-grid,.honest-grid,.faq-grid,.contact-grid,.students-card{grid-template-columns:1fr}
  .role-tabs{flex-direction:row;flex-wrap:wrap;max-width:none}
  .role-tabs button{padding:11px 16px;font-size:.93rem}
  .role-tabs button::after{display:none}
  .role-panels{padding:34px;min-height:0}
  .price-grid{grid-template-columns:1fr}
  .students-card{padding:36px}
  .foot-grid{grid-template-columns:1fr 1fr}
  .foot-brand{grid-column:1/-1}
}
@media (max-width:620px){
  .container{width:min(100% - 32px,1200px)}
  .section{padding-block:72px}
  .section-head{margin-bottom:40px}
  .hero h1{font-size:clamp(2.45rem,11vw,3.3rem)}
  .lead{font-size:1.04rem}
  .hero-actions .btn{flex:1 1 100%}
  .hero-facts{grid-template-columns:1fr;gap:14px;margin-top:40px}
  .hero-facts li{grid-template-columns:34px 1fr;align-items:baseline;gap:12px}
  .hero-facts b{font-size:1.6rem}
  .hero-facts span{max-width:none}
  .runner-bar{padding:12px 14px}
  .code{font-size:.78rem;margin-inline:14px;padding:14px}
  .runner-q,.tests,.runner-tabs{padding-inline:14px}
  .test-list li{grid-template-columns:1fr 80px;row-gap:2px}
  .test-list .exp{grid-column:1;grid-row:2}
  .test-list .res{grid-column:2;grid-row:1/3}
  .bs-side{padding:28px 24px}
  .bento{grid-template-columns:1fr}
  .tile-wide{grid-column:auto;grid-template-columns:1fr}
  .tile{padding:24px}
  .timeline{grid-template-columns:1fr;row-gap:32px}
  .timeline li{display:grid;grid-template-columns:50px 1fr;gap:18px;padding:0}
  .t-who{margin-top:4px}
  .flow{grid-template-columns:1fr}
  .role-panels{padding:28px 22px}
  .class-mock{grid-template-columns:1fr;min-height:0}
  .cm-side{flex-direction:row;align-items:center;padding:12px;overflow:hidden;border-right:0}
  .cm-logo{margin:0 8px 0 0}
  .cm-main{padding:16px}
  .honest-list li{padding:20px 20px 20px 56px}
  .honest-list li::before{left:18px}
  .price-foot{padding:24px}
  .price-foot .btn{width:100%}
  .students-card{padding:26px 22px}
  .enquiry{padding:24px 20px}
  .field-row{grid-template-columns:1fr}
  .form-actions{grid-template-columns:1fr}
  .faq-list details p{padding-right:4px}
  .foot-grid{gap:32px}
  .foot-bottom{flex-wrap:wrap}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
  .js .reveal{opacity:1;transform:none}
}