/* Stilliwrite Edu — Base design system */
:root{
  --bg:#0e1014;
  --surface:#161a21;
  --surface-2:#1d222b;
  --text:#eef1f6;
  --muted:#9aa3b2;
  --line:rgba(255,255,255,.08);
  --accent:#7cc4ff;
  --accent-2:#b39bff;
  --radius:18px;
  --shadow:0 30px 80px -30px rgba(0,0,0,.6);
  --serif:'Fraunces',ui-serif,Georgia,serif;
  --sans:'Inter',ui-sans-serif,system-ui,sans-serif;
  --max:1200px;
  --t:cubic-bezier(.2,.7,.2,1);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--sans);
  background:var(--bg);
  color:var(--text);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  min-height:100vh;
  background-image:
    radial-gradient(1200px 600px at 80% -10%,rgba(124,196,255,.10),transparent 60%),
    radial-gradient(900px 500px at -10% 30%,rgba(179,155,255,.08),transparent 60%);
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
h1,h2,h3{font-family:var(--serif);font-weight:600;letter-spacing:-.02em;line-height:1.1;margin:0}
h1{font-size:clamp(2.4rem,6vw,4.6rem)}
h2{font-size:clamp(1.6rem,3.2vw,2.4rem)}
h3{font-size:1.15rem}
p{margin:0}
.container{max-width:var(--max);margin:0 auto;padding:0 1.25rem}
.skip{position:absolute;left:-9999px;top:0;background:var(--accent);color:#000;padding:.6rem 1rem;border-radius:8px;z-index:100}
.skip:focus{left:1rem;top:1rem}

/* Header */
.site-header{position:sticky;top:0;z-index:50;backdrop-filter:saturate(160%) blur(14px);background:rgba(14,16,20,.7);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;padding:.9rem 0}
.brand{font-family:var(--serif);font-weight:600;font-size:1.25rem;letter-spacing:-.01em}
.brand span{color:var(--accent)}
.nav-links{display:flex;gap:1.5rem;align-items:center}
.nav-links a{color:var(--muted);font-size:.95rem;transition:color .25s var(--t)}
.nav-links a:hover{color:var(--text)}
.lang-toggle,.icon-btn{background:transparent;border:1px solid var(--line);color:var(--text);padding:.45rem .8rem;border-radius:999px;cursor:pointer;font:inherit;font-size:.85rem;transition:all .25s var(--t)}
.lang-toggle:hover,.icon-btn:hover{border-color:var(--accent);color:var(--accent)}
.menu-btn{display:none;background:transparent;border:1px solid var(--line);color:var(--text);padding:.5rem .7rem;border-radius:10px;cursor:pointer}

/* Hero */
.hero{padding:7rem 0 5rem;text-align:center;position:relative}
.kicker{display:inline-block;font-size:.78rem;letter-spacing:.18em;text-transform:uppercase;color:var(--accent);margin-bottom:1.2rem;padding:.4rem .9rem;border:1px solid var(--line);border-radius:999px;background:rgba(124,196,255,.06)}
.hero p{color:var(--muted);max-width:620px;margin:1.2rem auto 2rem;font-size:1.1rem}
.btn{display:inline-flex;align-items:center;gap:.5rem;padding:.85rem 1.6rem;border-radius:999px;background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#0b0d12;font-weight:600;border:0;cursor:pointer;transition:transform .25s var(--t),box-shadow .25s var(--t)}
.btn:hover{transform:translateY(-2px);box-shadow:0 20px 40px -20px rgba(124,196,255,.5)}
.btn.ghost{background:transparent;color:var(--text);border:1px solid var(--line)}
.btn.ghost:hover{border-color:var(--accent);color:var(--accent);box-shadow:none}

/* Grades grid */
.section{padding:5rem 0}
.section-head{text-align:center;margin-bottom:3rem}
.section-head p{color:var(--muted);margin-top:.6rem}
.grades-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:1.25rem}
.grade-card{
  position:relative;display:block;padding:1.8rem;border-radius:var(--radius);
  background:var(--surface);border:1px solid var(--line);overflow:hidden;
  transition:transform .35s var(--t),border-color .35s var(--t),box-shadow .35s var(--t);
}
.grade-card::before{content:"";position:absolute;inset:0;background:var(--card-grad,linear-gradient(135deg,rgba(124,196,255,.12),transparent 60%));opacity:.9;pointer-events:none}
.grade-card:hover{transform:translateY(-4px);border-color:var(--card-accent,var(--accent));box-shadow:var(--shadow)}
.grade-card>*{position:relative}
.grade-card .num{font-family:var(--serif);font-size:3rem;line-height:1;color:var(--card-accent,var(--accent));margin-bottom:.6rem}
.grade-card .tag{font-size:.75rem;color:var(--muted);letter-spacing:.12em;text-transform:uppercase;margin-bottom:.4rem}
.grade-card h3{font-size:1.5rem;font-family:var(--serif);margin-bottom:.5rem}
.grade-card p{color:var(--muted);font-size:.95rem}
.grade-card .arrow{margin-top:1.2rem;color:var(--card-accent,var(--accent));font-size:.9rem;letter-spacing:.05em}

/* Per-grade accent palette */
.grade-card[data-grade="k"]{--card-accent:#ffb86b;--card-grad:linear-gradient(135deg,rgba(255,184,107,.18),transparent 60%)}
.grade-card[data-grade="1"]{--card-accent:#7cc4ff;--card-grad:linear-gradient(135deg,rgba(124,196,255,.18),transparent 60%)}
.grade-card[data-grade="2"]{--card-accent:#7af0c7;--card-grad:linear-gradient(135deg,rgba(122,240,199,.18),transparent 60%)}
.grade-card[data-grade="3"]{--card-accent:#ffa6c1;--card-grad:linear-gradient(135deg,rgba(255,166,193,.18),transparent 60%)}
.grade-card[data-grade="4"]{--card-accent:#b39bff;--card-grad:linear-gradient(135deg,rgba(179,155,255,.20),transparent 60%)}
.grade-card[data-grade="5"]{--card-accent:#9ad7ff;--card-grad:linear-gradient(135deg,rgba(154,215,255,.18),transparent 60%)}

/* Subjects on grade pages */
.grade-hero{padding:6rem 0 3rem;text-align:center}
.grade-hero .num-big{font-family:var(--serif);font-size:clamp(5rem,15vw,9rem);line-height:.9;color:var(--accent);margin:0 0 .5rem;letter-spacing:-.04em}
.grade-hero p{color:var(--muted);max-width:620px;margin:1rem auto 0}
.subjects-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:1.25rem;margin-top:2rem}
.subject{padding:1.6rem;border-radius:var(--radius);background:var(--surface);border:1px solid var(--line);transition:transform .3s var(--t),border-color .3s var(--t)}
.subject:hover{transform:translateY(-3px);border-color:var(--accent)}
.subject .icon{font-size:2rem;margin-bottom:.6rem}
.subject h3{font-family:var(--serif);font-size:1.2rem;margin-bottom:.4rem}
.subject p{color:var(--muted);font-size:.92rem}
.coming{margin-top:3rem;padding:2rem;border:1px dashed var(--line);border-radius:var(--radius);text-align:center;color:var(--muted)}
.coming strong{color:var(--text);font-family:var(--serif);font-size:1.3rem;display:block;margin-bottom:.4rem}

.footer{padding:3rem 0;text-align:center;color:var(--muted);font-size:.85rem;border-top:1px solid var(--line);margin-top:4rem}
.back-link{display:inline-block;margin:1.5rem 0;color:var(--muted);font-size:.9rem;transition:color .2s}
.back-link:hover{color:var(--accent)}

/* Accessibility panel */
.a11y{position:fixed;bottom:1.2rem;right:1.2rem;z-index:60}
.a11y-toggle{width:48px;height:48px;border-radius:50%;border:1px solid var(--line);background:var(--surface);color:var(--text);font-size:1.2rem;cursor:pointer;box-shadow:var(--shadow)}
.a11y-panel{position:absolute;bottom:60px;right:0;width:260px;padding:1rem;background:var(--surface-2);border:1px solid var(--line);border-radius:14px;display:none;box-shadow:var(--shadow)}
.a11y-panel.open{display:block}
.a11y-panel h4{margin:0 0 .6rem;font-family:var(--serif);font-size:1rem}
.a11y-panel label{display:flex;align-items:center;gap:.6rem;padding:.45rem 0;font-size:.9rem;color:var(--muted);cursor:pointer}
.a11y-panel input{accent-color:var(--accent)}

/* Reveal */
.reveal{opacity:0;transform:translateY(20px);transition:opacity .8s var(--t),transform .8s var(--t)}
.reveal.in{opacity:1;transform:none}

/* A11y modes */
body.high-contrast{--bg:#000;--surface:#0a0a0a;--surface-2:#111;--text:#fff;--muted:#ddd;--line:rgba(255,255,255,.3);--accent:#ffd866}
body.dyslexia,body.dyslexia *{font-family:'Comic Sans MS','Trebuchet MS',var(--sans)!important;letter-spacing:.02em;line-height:1.8}
body.focus-mode .site-header,body.focus-mode .footer,body.focus-mode .a11y{opacity:.25}
body.focus-mode .site-header:hover,body.focus-mode .footer:hover,body.focus-mode .a11y:hover{opacity:1}
body.reduce-motion *,body.reduce-motion *::before,body.reduce-motion *::after{transition:none!important;animation:none!important}

/* === Per-grade page themes === */
body[data-grade-page="k"]{--accent:#ffb86b;--accent-2:#ffd9a8;background-image:radial-gradient(900px 500px at 80% -10%,rgba(255,184,107,.18),transparent 60%),radial-gradient(900px 500px at -10% 40%,rgba(255,166,193,.10),transparent 60%)}
body[data-grade-page="k"]{font-family:'Quicksand',var(--sans)}
body[data-grade-page="k"] .subject{border-radius:24px}
body[data-grade-page="k"] h1,body[data-grade-page="k"] h2,body[data-grade-page="k"] h3{font-family:'Fraunces',var(--serif)}

body[data-grade-page="1"]{--accent:#7cc4ff;--accent-2:#a8dcff}
body[data-grade-page="2"]{--accent:#7af0c7;--accent-2:#b8f5dc;background-image:radial-gradient(900px 500px at 80% -10%,rgba(122,240,199,.15),transparent 60%)}
body[data-grade-page="3"]{--accent:#ffa6c1;--accent-2:#ffd0dd;background-image:radial-gradient(900px 500px at 80% -10%,rgba(255,166,193,.18),transparent 60%)}
body[data-grade-page="4"]{--accent:#b39bff;--accent-2:#d4c5ff;background-image:radial-gradient(900px 500px at 80% -10%,rgba(179,155,255,.20),transparent 60%),radial-gradient(700px 400px at 0% 60%,rgba(255,166,193,.10),transparent 60%)}
body[data-grade-page="5"]{
  --bg:#05060a;--surface:#0d1018;--accent:#9ad7ff;--accent-2:#b39bff;
  background-image:
    radial-gradient(2px 2px at 20% 30%,rgba(255,255,255,.6),transparent),
    radial-gradient(1px 1px at 70% 50%,rgba(255,255,255,.5),transparent),
    radial-gradient(1.5px 1.5px at 40% 80%,rgba(255,255,255,.4),transparent),
    radial-gradient(1200px 600px at 80% -10%,rgba(154,215,255,.15),transparent 60%),
    radial-gradient(900px 500px at 0% 70%,rgba(179,155,255,.15),transparent 60%);
}

@media (max-width:768px){
  .nav-links{display:none}
  .menu-btn{display:inline-flex}
  .hero{padding:4rem 0 3rem}
  .nav-links.open{display:flex;position:absolute;top:100%;left:0;right:0;flex-direction:column;background:var(--surface);padding:1rem;border-bottom:1px solid var(--line);gap:1rem}
}