:root{--red:#d8232a;--red-dark:#aa151b;--ink:#202124;--muted:#687078;--line:#d9dde1;--bg:#f4f5f6;--green:#18794e;--blue:#145da0;--shadow:0 16px 45px rgba(23,30,37,.12)}
*{box-sizing:border-box}body{min-height:100vh;margin:0;background:var(--bg);color:var(--ink);font-family:Arial,Helvetica,sans-serif;line-height:1.45;display:flex;flex-direction:column}a{color:var(--blue);text-decoration:none}button,input{font:inherit}
.topbar{height:76px;flex:0 0 76px;padding:0 max(24px,calc((100vw - 1180px)/2));display:flex;align-items:center;justify-content:space-between;background:#fff;border-bottom:1px solid var(--line)}.brand{height:100%;display:flex;align-items:center;gap:11px;color:var(--ink);overflow:hidden}.brand-logo{display:block;flex:0 0 auto;width:36px;height:48px;object-fit:contain}.brand strong,.brand small{display:block;white-space:nowrap}.brand strong{font-size:18px;line-height:1.1}.brand small{margin-top:3px;color:var(--muted);font-size:10px;line-height:1.1;letter-spacing:.1em;text-transform:uppercase}.userbox{display:flex;gap:18px;align-items:center;font-size:14px}.userbox a{color:var(--red-dark);font-weight:bold}
.nav{height:54px;padding:0 max(24px,calc((100vw - 1180px)/2));display:flex;gap:32px;background:#fff;border-bottom:1px solid var(--line)}.nav a{display:flex;align-items:center;color:#454b50;font-weight:bold;font-size:14px;border-bottom:3px solid transparent}.nav a.active{color:var(--red);border-color:var(--red)}
.page{width:100%;max-width:1180px;flex:1;margin:0 auto;padding:42px 24px 72px}.hero{max-width:750px;margin-bottom:32px}.eyebrow{display:block;color:var(--red-dark);font-size:12px;font-weight:bold;letter-spacing:.12em;text-transform:uppercase;margin-bottom:8px}h1,h2{line-height:1.15;margin:0 0 12px}h1{font-size:38px}h2{font-size:25px}.hero p,.muted{color:var(--muted)}.hero p{font-size:18px}.page-head{display:flex;justify-content:space-between;margin-bottom:30px}
.scanner-card,.panel,.class-card,.table-wrap{background:#fff;border:1px solid var(--line);box-shadow:0 2px 4px rgba(0,0,0,.03)}.scanner-card{max-width:790px;padding:38px;position:relative;border-top:4px solid var(--red)}.scan-icon{position:absolute;right:36px;top:28px;color:#c8cdd1;font-size:58px}.scanner-card label{display:block;font-weight:bold;margin-bottom:10px}.scanner-input{width:100%;height:70px;padding:0 18px;border:2px solid #8c949b;font-size:27px;font-family:Consolas,monospace;letter-spacing:.06em}.scanner-input:focus{outline:3px solid rgba(216,35,42,.17);border-color:var(--red)}
.modal{position:fixed;inset:0;z-index:10;background:rgba(18,22,26,.72);display:none;align-items:center;justify-content:center;padding:20px}.modal.visible{display:flex}.modal-panel{position:relative;width:min(720px,100%);background:#fff;padding:42px;box-shadow:var(--shadow);border-top:6px solid var(--red)}.modal-close{position:absolute;right:16px;top:12px;border:0;background:none;color:#555;font-size:30px;cursor:pointer}.choice-grid{display:grid;grid-template-columns:1fr 1fr;gap:15px;margin-top:28px}.choice{padding:28px 20px;border:0;color:#fff;text-align:left;cursor:pointer}.choice strong,.choice span{display:block}.choice strong{font-size:25px;margin-bottom:5px}.choice span{opacity:.85}.choice.entry{background:var(--green)}.choice.exit{background:#525a61}.choice:hover{filter:brightness(.92)}.choice:disabled{opacity:.5}.status-line{min-height:24px;font-weight:bold}
.class-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.class-card{padding:24px;color:var(--ink);display:flex;align-items:center;justify-content:space-between;border-left:4px solid var(--red)}.class-card:hover{box-shadow:var(--shadow)}.class-card strong,.class-card span,.class-count b{display:block}.class-card strong{font-size:22px}.class-card span,.class-count span{color:var(--muted);font-size:13px}.class-count{text-align:right}.class-count b{font-size:30px;color:var(--green)}.backlink{display:inline-block;margin-bottom:18px;font-weight:bold}.table-wrap{overflow:auto;margin-top:22px}table{width:100%;border-collapse:collapse}th,td{padding:16px 18px;text-align:left;border-bottom:1px solid var(--line)}th{background:#f0f2f3;font-size:12px;text-transform:uppercase;letter-spacing:.06em}.badge{display:inline-block;border-radius:20px;padding:5px 10px;font-size:12px;font-weight:bold}.badge.inside{background:#d9f0e5;color:#12643f}.badge.outside{background:#eceeef;color:#525a61}.actions{white-space:nowrap}.actions a{margin-right:14px;font-weight:bold;font-size:13px}.mono{font-family:Consolas,monospace}.history-panel{max-height:85vh;overflow:auto}.timeline{margin-top:24px}.timeline-item{display:flex;gap:14px;padding:14px 0;border-bottom:1px solid var(--line)}.timeline-item small{display:block;color:var(--muted)}.dot{width:12px;height:12px;border-radius:50%;margin-top:5px;background:#606970}.dot.entry{background:var(--green)}
.two-column{display:grid;grid-template-columns:1fr 1fr;gap:24px}.panel{padding:30px}.accent-panel{background:#343a40;color:#fff;border:0}.accent-panel p{color:#dce0e3}.stack{display:grid;gap:18px;margin-top:25px}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.wide{grid-column:1/-1}.section-title{font-weight:bold;margin-top:12px;padding-top:18px;border-top:1px solid var(--line)}label{font-size:14px;font-weight:bold}label input{display:block;width:100%;margin-top:7px;padding:12px;border:1px solid #9ca3a9;background:#fff}.button{display:inline-flex;justify-content:center;border:0;background:var(--red);color:#fff;padding:13px 20px;font-weight:bold;cursor:pointer}.button:hover{background:var(--red-dark)}.button.light{background:#fff;color:#292e32}.notice{padding:14px 16px;margin-bottom:22px;border-left:4px solid #687078;background:#fff}.notice.success{border-color:var(--green)}.notice.error{border-color:var(--red)}.success-text{color:var(--green)}.error-text{color:var(--red-dark)}.empty{padding:24px;color:var(--muted)}
.site-footer{flex:0 0 auto;background:#292f34;color:#c8cdd1;border-top:3px solid var(--red)}.footer-inner{max-width:1180px;margin:0 auto;padding:18px 24px;display:flex;align-items:center;justify-content:space-between;gap:24px;font-size:12px}.footer-brand,.footer-credit{display:flex;align-items:center;gap:9px}.footer-brand strong{color:#fff;font-size:13px}.footer-brand>span:last-child{padding-left:9px;border-left:1px solid #535b62}.footer-mark{width:7px;height:7px;border-radius:50%;background:var(--red)}.footer-credit{color:#9ea5aa}.footer-credit span{color:#e0e3e5}.auth-page{min-height:100vh;display:grid;grid-template-rows:1fr auto;place-items:center;padding:24px 0 0;background:linear-gradient(135deg,#eef0f1 0 60%,#e2e5e7 60%)}.auth-page .site-footer{width:100%}.auth-card{width:min(460px,calc(100% - 48px));padding:38px;background:#fff;border-top:6px solid var(--red);box-shadow:var(--shadow)}.auth-card .brand{height:auto;margin-bottom:30px;overflow:visible}.auth-card .brand-logo{width:42px;height:55px}.auth-card h1{font-size:31px}.setup-card{width:min(700px,calc(100% - 48px))}
@media(max-width:800px){.class-grid,.two-column{grid-template-columns:1fr}.nav{gap:16px;overflow:auto}.choice-grid{grid-template-columns:1fr}.form-grid{grid-template-columns:1fr}.wide{grid-column:auto}.userbox span{display:none}.page{padding:28px 16px}.scanner-card,.modal-panel{padding:24px}.scan-icon{display:none}h1{font-size:31px}.actions a{display:block;margin:5px 0}.footer-inner{padding:16px;flex-direction:column;gap:7px}.footer-brand>span:last-child{display:none}.brand-logo{width:32px;height:42px}.topbar{height:68px;flex-basis:68px}}