:root {
  --ink:#252b31;
  --slate:#42556e;
  --slate-dark:#314157;
  --olive:#a7a27b;
  --rust:#cf5d1e;
  --paper:#f6f4ef;
  --white:#fff;
  --line:#dedbd3;
  --muted:#68717a;
  --shadow:0 16px 45px rgba(37,43,49,.10);
  --radius:22px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Inter,Arial,sans-serif;color:var(--ink);background:linear-gradient(180deg,#fbfaf7 0%,#f3f1eb 100%);min-height:100vh}
a{color:inherit}.site-shell{width:min(1160px,calc(100% - 32px));margin:auto}
.site-header{padding:18px 0}.nav{display:flex;align-items:center;justify-content:space-between;gap:24px}.brand img{display:block;width:min(360px,56vw);max-height:86px;object-fit:contain;object-position:left center}.nav-actions{display:flex;gap:10px;flex-wrap:wrap}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid transparent;border-radius:999px;padding:12px 20px;font-weight:700;text-decoration:none;cursor:pointer;font-size:15px}.btn-primary{background:var(--rust);color:white}.btn-secondary{background:white;border-color:var(--line);color:var(--ink)}.btn-dark{background:var(--ink);color:white}.hero{padding:56px 0 38px;display:grid;grid-template-columns:1.2fr .8fr;gap:48px;align-items:center}.eyebrow{font-size:13px;font-weight:800;letter-spacing:.14em;text-transform:uppercase;color:var(--rust)}h1{font-size:clamp(42px,6vw,76px);line-height:.98;letter-spacing:-.045em;margin:16px 0 22px}.hero p{font-size:20px;line-height:1.6;color:var(--muted);max-width:700px}.hero-card{background:white;border:1px solid var(--line);border-radius:30px;padding:32px;box-shadow:var(--shadow)}.hero-card img{width:100%;max-height:360px;object-fit:contain}.cta-row{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}.section{padding:58px 0}.section-title{text-align:center;max-width:760px;margin:0 auto 34px}.section-title h2{font-size:clamp(32px,4vw,48px);margin:0 0 12px}.section-title p{color:var(--muted);font-size:18px;line-height:1.55}.tool-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.tool-card{background:white;border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:0 10px 30px rgba(37,43,49,.06);display:flex;flex-direction:column;min-height:340px}.tool-card img{width:100%;height:120px;object-fit:contain;object-position:left center;margin-bottom:16px}.tool-card h3{font-size:28px;margin:0 0 10px}.tool-card p{color:var(--muted);line-height:1.55;flex:1}.status{display:inline-flex;align-self:flex-start;padding:7px 11px;border-radius:999px;font-size:12px;font-weight:800;text-transform:uppercase;letter-spacing:.08em;background:#ece9df;color:var(--slate-dark)}.status.live{background:#f3dfd3;color:#9a3f10}.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.step{background:rgba(255,255,255,.7);border:1px solid var(--line);border-radius:18px;padding:24px}.step-num{width:40px;height:40px;border-radius:50%;display:grid;place-items:center;background:var(--slate-dark);color:white;font-weight:800;margin-bottom:16px}.site-footer{border-top:1px solid var(--line);padding:26px 0 42px;color:var(--muted);font-size:14px}.auth-wrap{width:min(560px,calc(100% - 32px));margin:42px auto}.auth-logo{text-align:center;margin-bottom:22px}.auth-logo img{width:min(380px,90%);max-height:110px;object-fit:contain}.card{background:white;border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow)}.card h1,.card h2{margin-top:0}.field{margin-bottom:16px}.field label{display:block;font-weight:700;margin-bottom:7px}.field input,.field textarea,.field select{width:100%;padding:13px 14px;border:1px solid #cfcac0;border-radius:12px;background:white;font:inherit}.form-button{width:100%;border:0}.error{color:#a31321;font-weight:700;background:#fff0f2;border:1px solid #efccd1;border-radius:12px;padding:12px}.small-note{font-size:13px;color:var(--muted);line-height:1.5}.back-link{display:inline-block;margin-bottom:16px;color:var(--slate-dark);font-weight:700;text-decoration:none}
@media(max-width:850px){.hero{grid-template-columns:1fr}.hero-card{order:-1}.tool-grid,.steps{grid-template-columns:1fr}.nav{align-items:flex-start}.brand img{width:250px}.nav-actions{justify-content:flex-end}}
@media(max-width:560px){.nav{display:block}.nav-actions{margin-top:14px}.nav-actions .btn{flex:1}.hero{padding-top:28px}.hero-card{padding:20px}.site-shell{width:min(100% - 22px,1160px)}}

.student-shell{padding:22px 0 60px}.student-top{display:grid;grid-template-columns:auto 1fr auto;gap:22px;align-items:center;padding:14px 0 28px;border-bottom:1px solid var(--line)}.student-top img{width:260px;max-height:82px;object-fit:contain}.student-welcome{padding:42px 0 24px}.student-welcome h1{font-size:clamp(36px,5vw,58px);margin:12px 0}.student-welcome p{font-size:18px;color:var(--muted)}.student-tool-grid{display:grid;gap:18px}.student-tool-card{display:grid;grid-template-columns:110px 1fr auto;gap:22px;align-items:center;background:white;border:1px solid var(--line);border-radius:22px;padding:22px;box-shadow:0 10px 30px rgba(37,43,49,.06)}.student-tool-card img{width:100px;height:82px;object-fit:contain}.student-tool-card h2{margin:0 0 6px;font-size:28px}.student-tool-card p{margin:0;color:var(--muted);line-height:1.5}@media(max-width:700px){.student-top{grid-template-columns:1fr}.student-top img{width:220px}.student-tool-card{grid-template-columns:75px 1fr}.student-tool-card img{width:70px;height:60px}.student-tool-card>.btn,.student-tool-card>.status{grid-column:1/-1;justify-self:stretch;text-align:center}}
.page-brand img{width:min(420px,90%);max-height:105px;object-fit:contain;object-position:left center}.admin-grid{display:grid;grid-template-columns:minmax(280px,.8fr) minmax(380px,1.2fr);gap:22px;margin-top:24px}.success-box{color:#35613b;font-weight:700;background:#edf7ee;border:1px solid #cce2cf;border-radius:12px;padding:12px}.toggle-row{display:flex;gap:10px;align-items:center;margin:14px 0;font-weight:700}.toggle-row input{width:18px;height:18px}.request-list{display:grid;gap:12px}.request-item{display:grid;grid-template-columns:42px 1fr auto;gap:14px;align-items:center;border:1px solid var(--line);border-radius:16px;padding:14px;background:#fbfaf7}.request-item.in-progress{border-color:var(--rust);background:#fff6f0}.request-number{width:38px;height:38px;border-radius:50%;display:grid;place-items:center;background:var(--slate-dark);color:white;font-weight:800}.request-info{display:grid;gap:3px}.request-info span{color:var(--slate-dark)}.request-info small{color:var(--muted)}.request-actions{display:flex;gap:7px;flex-wrap:wrap;justify-content:flex-end}.request-actions .btn{padding:8px 12px;font-size:13px}.inline-form{display:grid;grid-template-columns:1fr auto;gap:10px;margin:18px 0}.inline-form input,.option-row input[type=text],.option-row input:not([type]){padding:12px;border:1px solid #cfcac0;border-radius:12px;font:inherit}.option-list{display:grid;gap:10px}.option-row{display:grid;grid-template-columns:1fr auto auto auto;gap:10px;align-items:center;padding:10px;border:1px solid var(--line);border-radius:14px}.empty-state{padding:22px;border:1px dashed #c9c5bb;border-radius:14px;color:var(--muted);text-align:center}.student-request-status{text-align:center}.queue-position{width:110px;height:110px;border-radius:50%;margin:18px auto;display:grid;place-items:center;background:var(--rust);color:white;font-size:44px;font-weight:800;box-shadow:var(--shadow)}
@media(max-width:850px){.admin-grid{grid-template-columns:1fr}.request-item{grid-template-columns:42px 1fr}.request-actions{grid-column:1/-1;justify-content:stretch}.request-actions .btn{flex:1}.option-row{grid-template-columns:1fr 1fr}.option-row input:first-of-type{grid-column:1/-1}.inline-form{grid-template-columns:1fr}}
.noise-preview{text-align:center;padding:18px;border:1px solid var(--line);border-radius:18px;background:#faf9f6;margin-bottom:18px}.noise-preview-label{font-size:28px;font-weight:900}.noise-preview-meter{height:28px;border-radius:999px;background:#e6e2d8;overflow:hidden;margin:18px 0}.noise-preview-meter span{display:block;height:100%;background:var(--rust)}.noise-preview-status{font-weight:800;text-transform:capitalize}.field input[type=range]{padding:0;border:0;accent-color:var(--rust)}