.admin-body{background:#f1f3f0}.admin-top{height:76px;background:#17382b;color:#fff;display:flex;align-items:center;justify-content:space-between;padding:0 5vw}.admin-brand{display:flex;align-items:center;gap:12px;color:#fff;text-decoration:none;font-weight:700}.admin-brand img{width:50px;height:50px;object-fit:contain;background:#fff;border-radius:50%}.admin-brand small{display:block;color:#b7c9c0;font-size:9px;letter-spacing:.14em}.admin-top nav{display:flex;align-items:center;gap:22px}.admin-top nav a{color:#fff;text-decoration:none}.admin-top nav span{color:#b7c9c0}.admin-main{max-width:1380px;margin:auto;padding:45px 5vw;min-height:calc(100vh - 130px)}.admin-heading{display:flex;align-items:end;justify-content:space-between;margin-bottom:28px}.admin-heading h1{font:700 38px 'Noto Serif JP';margin:0}.admin-heading p{color:var(--muted);margin:5px 0}.admin-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:30px}.admin-stats article{background:#fff;border:1px solid var(--line);padding:24px}.admin-stats small{display:block;color:var(--muted);font-size:10px;letter-spacing:.1em}.admin-stats strong{font:700 38px 'Noto Serif JP'}.admin-panel{background:#fff;border:1px solid var(--line);padding:25px}.panel-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:18px}.panel-head h2,.admin-panel h2{margin:0;font:700 22px 'Noto Serif JP'}.panel-head a{color:var(--red)}.empty{text-align:center;color:var(--muted);padding:45px}.admin-login{min-height:70vh;display:grid;place-items:center}.admin-login .login-card{width:min(440px,100%)}.admin-login-logo{width:85px;height:85px;object-fit:contain}.admin-login h1{font:700 30px 'Noto Serif JP';margin:0}.student-login-link{display:block;text-align:center;color:var(--muted);margin-top:18px}.admin-columns{display:grid;grid-template-columns:360px 1fr;gap:20px}.create-code h2{margin-bottom:20px}.code-row{display:flex;justify-content:space-between;align-items:center;padding:18px 0;border-top:1px solid var(--line)}.code-row code{background:#e7f1eb;color:#235d45;font-size:16px;font-weight:700;padding:5px 9px}.code-row h3{margin:8px 0 0}.code-row p,.code-row small{margin:2px 0;color:var(--muted)}.code-row form{text-align:right}.code-row form .btn{display:block;margin-top:9px}.status{font-size:10px;font-weight:700;padding:4px 8px;border-radius:20px}.status.active{background:#e3f4e9;color:#287047}.status.inactive{background:#eee;color:#777}.admin-notice{padding:12px 16px;margin-bottom:15px}.admin-notice.success{background:#e3f4e9;color:#287047}.admin-notice.error{background:#fbe9e7;color:#9e2e27}.admin-result{max-width:800px;margin:auto;background:#fff;border:1px solid var(--line);padding:45px;text-align:center}.admin-result h1{font:700 32px 'Noto Serif JP'}.back-link{display:block;text-align:left;color:var(--muted)}.admin-score-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin:30px 0}.admin-score-grid span{background:#f4f4f0;padding:18px}.admin-score-grid small,.admin-score-grid b{display:block}.admin-score-grid b{font-size:30px}.admin-score-grid .total{background:#203a2f;color:#fff}@media(max-width:800px){.admin-top nav a:not(:last-child),.admin-top nav span{display:none}.admin-main{padding:25px 15px}.admin-stats{grid-template-columns:1fr 1fr}.admin-columns{grid-template-columns:1fr}.admin-heading{align-items:start;gap:20px}.code-row{align-items:start;gap:10px}.admin-score-grid{grid-template-columns:1fr 1fr}}@media print{.admin-top,body>footer,.back-link,.admin-result>.btn{display:none!important}.admin-main{padding:0}.admin-result{border:0;padding:0;max-width:none}}