:root{--bg:#eeeeee;--panel:#ffffff;--border:#d9d9d9;--text:#111111;--muted:#5f6368;--blue:#1a3a6e;--blue-dark:#10294a;--red:#d60000;--white:#ffffff;--black:#111111}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,Segoe UI,Arial,sans-serif}a{color:inherit}button,input,select,textarea{font:inherit}.login-page{min-height:100vh;display:grid;place-items:center;padding:24px;background:linear-gradient(135deg,#d60000,#a50000 46%,#111 0,#111)}.login-card{width:min(460px,100%);background:var(--panel);border:1px solid var(--border);border-top:8px solid var(--red);border-radius:18px;padding:30px;box-shadow:0 18px 60px #0007}.brand{display:flex;align-items:center;gap:12px;margin-bottom:20px;text-decoration:none;color:inherit}.brand-mark{width:44px;height:44px;border-radius:12px;background:var(--red);display:grid;place-items:center;color:#fff;font-weight:900}.brand-mark-logo{overflow:hidden;background:#fff;border:1px solid #fee2e2}.brand-mark-logo img{width:100%;height:100%;object-fit:contain;padding:3px}.brand strong{display:block}.brand small{color:var(--muted)}.form{display:grid;grid-gap:12px;gap:12px}.field{display:grid;grid-gap:6px;gap:6px}.field label{font-weight:800;font-size:13px;color:#334155}.field input,.field select,.field textarea{border:1px solid #cbd5e1;border-radius:10px;padding:12px;background:#fff}.btn{border:0;border-radius:8px;padding:10px 14px;font-weight:900;cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;gap:8px}.btn-red{background:var(--red);color:#fff}.btn-blue{background:var(--blue);color:#fff}.btn-ghost{background:#fff;color:var(--blue);border:1px solid #cbd5e1}.error{background:#fee2e2;color:#991b1b;border:1px solid #fecaca;border-radius:10px}.error,.success{padding:10px;font-weight:700}.success{background:#dcfce7;color:#166534;border:1px solid #86efac;border-radius:10px}.auth-panel{border-top:1px solid var(--border);padding:14px 0}.auth-panel 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clamp(20px,7vw,120px)}.admin-page{min-height:100vh;background:#fff}.admin-topbar{position:-webkit-sticky;position:sticky;top:0;z-index:10}.admin-exit{border:1px solid #ffffff55;background:#fff;color:var(--red);border-radius:10px;padding:10px 14px;font-weight:900;cursor:pointer}.admin-wrap{width:min(1180px,calc(100% - 32px));margin:0 auto;padding:42px 0 70px}.admin-title h1{margin:0;font-size:34px}.admin-tabs{display:flex;flex-wrap:wrap;gap:10px;margin:24px 0;border-bottom:1px solid var(--border);padding-bottom:18px}.admin-tabs a{text-decoration:none;border:1px solid var(--border);background:#fff;border-radius:999px;padding:10px 18px;font-weight:900;color:#334155}.admin-tabs a.active{background:var(--red);color:#fff;border-color:var(--red)}.admin-panel{background:#fff;border:1px solid var(--border);border-radius:14px;padding:22px;margin:18px 0;box-shadow:0 8px 24px #0000000a}.admin-panel h2{margin:0 0 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h2{margin:0;font-size:24px}.admin-access-card p{margin:0;color:var(--muted);line-height:1.55}.admin-access-card .btn{align-self:end;margin-top:auto}.admin-form{display:grid;grid-gap:14px;gap:14px}.access-admin-form{grid-template-columns:repeat(auto-fit,minmax(220px,1fr));align-items:end}.access-admin-form label{display:grid;grid-gap:6px;gap:6px;font-weight:900}.access-admin-form input{border:1px solid var(--border);border-radius:10px;padding:12px 14px;font:inherit}.table-wrap{width:100%;overflow-x:auto}.access-device{max-width:360px;word-break:break-word;color:var(--muted);font-size:12px}.admin-product-card{display:flex;justify-content:space-between;gap:16px;align-items:center;border:1px solid var(--border);border-radius:12px;padding:16px;background:#fafafa;margin:16px 0}.content-toolbar{display:flex;flex-wrap:wrap;gap:8px;margin:16px 0}.admin-module{border:1px dashed 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(max-width:760px){.shell{grid-template-columns:1fr}.main{padding:16px}.hero-actions,.site-footer,.site-header,.site-nav{align-items:flex-start;flex-direction:column}.site-hero,.split-section{grid-template-columns:1fr}.student-brand-row,.student-topbar{justify-content:center}.student-brand-row{flex-direction:column}.student-access-section,.student-login-card{grid-template-columns:1fr}.student-access-section{margin-top:16px}.student-topbar{font-size:18px}.student-nav{justify-content:center}.student-nav a{min-height:48px;font-size:16px}.admin-content-row,.admin-product-card,.batch-list article,.module-head{display:grid;grid-template-columns:1fr}}