:root{--primary:#2a4d69;--accent:#ff6b35;--blue:#1975c5;--bg:#f1f5f9;--ink:#1e293b;--muted:#64748b;--line:#e2e8f0;--ok:#22c55e;--warn:#f59e0b}
*{box-sizing:border-box}html,body,#app{margin:0;min-height:100%;font-family:Inter,Arial,sans-serif;color:var(--ink);background:var(--bg)}button,input,textarea,select{font:inherit}.app-shell{min-height:100vh}
.topbar{height:64px;background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20;display:flex;align-items:center;justify-content:space-between;padding:0 max(18px,calc((100% - 980px)/2))}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--primary)}.brand-mark{display:inline-grid;place-items:center;width:36px;height:36px;border-radius:11px;background:var(--primary);color:#fff;font-size:22px;box-shadow:0 7px 16px #2a4d6930}.brand-mark.large{width:64px;height:64px;border-radius:18px;font-size:36px}.brand strong{display:block;font-size:18px}.brand strong span,.login-brand h1 span{color:var(--accent)}.brand small{display:block;color:var(--muted);font-size:11px}
.user-actions{display:flex;align-items:center;gap:9px}.user-avatar{width:34px;height:34px;border-radius:50%;display:grid;place-items:center;background:var(--accent);color:#fff;font-weight:700;font-size:12px}.icon-button,.close-button{border:0;background:transparent;color:var(--muted);cursor:pointer}
.app-content{max-width:980px;margin:auto;padding:26px 18px 100px}.field-heading{display:flex;justify-content:space-between;gap:24px;align-items:flex-start}.eyebrow{color:var(--accent)!important;font-size:11px!important;font-weight:700;letter-spacing:.1em;margin:0 0 5px!important}.field-heading h1{font-size:28px;color:var(--primary);margin:0 0 7px}.field-heading p{color:var(--muted);margin:0;font-size:14px}
.sync-button,.primary-button,.microsoft-button{border:0;border-radius:12px;min-height:45px;padding:0 18px;font-weight:700;cursor:pointer}.sync-button,.primary-button{background:var(--primary);color:#fff;box-shadow:0 5px 13px #2a4d6928}.sync-button:disabled,.primary-button:disabled{opacity:.65}.spin{display:inline-block;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}
.status-strip{display:flex;gap:18px;align-items:center;flex-wrap:wrap;background:#fff;border:1px solid var(--line);border-radius:14px;margin:22px 0 16px;padding:12px 16px;color:var(--muted);font-size:12px}.connection{display:flex;align-items:center;gap:7px}.connection i{width:8px;height:8px;border-radius:50%;background:var(--ok)}.connection.offline i{background:var(--warn)}
.notice{border-radius:11px;padding:12px 14px;margin:0 0 14px;font-size:13px}.notice.success{background:#ecfdf5;color:#166534}.notice.warning{background:#fffbeb;color:#92400e}.search-box{height:46px;background:#fff;border:1px solid var(--line);border-radius:14px;display:flex;align-items:center;gap:9px;padding:0 14px;margin-bottom:24px;color:var(--muted)}.search-box input{border:0;outline:0;width:100%;font-size:14px}
.project-group{margin-top:23px}.project-group>h2{display:flex;align-items:center;gap:10px;color:var(--primary);font-size:16px;margin:0 0 10px}.project-group>h2 small{font-size:10px;background:#dbeafe;color:var(--blue);padding:4px 8px;border-radius:20px}.assignment-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.assignment-card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:16px;cursor:pointer;transition:.18s}.assignment-card:hover,.assignment-card.selected{border-color:#94b7d2;box-shadow:0 8px 20px #1e293b12;transform:translateY(-1px)}.assignment-main{display:flex;gap:12px;align-items:flex-start}.assignment-code{flex:0 0 auto;padding:6px 8px;border-radius:8px;background:#eff6ff;color:var(--blue);font-size:10px;font-weight:700}.assignment-copy{min-width:0}.assignment-copy h3{font-size:14px;margin:1px 0 6px}.assignment-copy p{margin:0;color:var(--muted);font-size:11px;line-height:1.5}.card-arrow{margin-left:auto;color:#94a3b8;font-size:25px}
.progress-line{height:6px;background:#e9eef3;border-radius:5px;margin:14px 0 8px;overflow:hidden}.progress-line span{display:block;height:100%;background:linear-gradient(90deg,var(--blue),#4bb7db);border-radius:5px}.assignment-meta{display:flex;justify-content:space-between;color:var(--muted);font-size:11px}.queue-state{color:#15803d}.queue-state.pending{color:#a16207}.queue-state.conflict,.queue-state.failed{color:#b91c1c}
.empty-state{min-height:320px;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;color:var(--muted);gap:8px}.empty-state h2{color:var(--primary);font-size:18px;margin:8px 0 0}.empty-state p{max-width:390px;font-size:13px}.empty-icon{width:58px;height:58px;display:grid;place-items:center;border-radius:50%;background:#dcfce7;color:#15803d;font-size:30px}
.sheet-backdrop{position:fixed;inset:0;background:#0f172a88;z-index:50}.progress-sheet{position:fixed;z-index:51;right:0;top:0;height:100vh;width:min(460px,100%);background:#fff;padding:24px;overflow:auto;box-shadow:-15px 0 40px #0f172a33}.sheet-handle{display:none}.progress-sheet header{display:flex;justify-content:space-between;gap:16px;border-bottom:1px solid var(--line);padding-bottom:18px;margin-bottom:20px}.progress-sheet header small{color:var(--muted)}.progress-sheet h2{font-size:19px;color:var(--primary);margin:5px 0}.close-button{font-size:28px}
.progress-sheet form>label{display:block;font-weight:600;font-size:13px;margin:17px 0 7px}.progress-sheet label span{font-weight:400;color:var(--muted)}.progress-sheet textarea,.progress-sheet select,.quantity-input{width:100%;border:1px solid var(--line);border-radius:11px;padding:12px;outline:none}.progress-sheet textarea{min-height:84px;resize:vertical}.quantity-input{font-size:22px;font-weight:700;color:var(--primary)}.quantity-summary{display:flex;justify-content:space-between;align-items:center;background:#f8fafc;border-radius:10px;padding:10px 12px;margin-bottom:8px;font-size:12px}.block-toggle{display:flex!important;align-items:flex-start;gap:11px;background:#fff7ed;border:1px solid #fed7aa;border-radius:12px;padding:13px}.block-toggle input{margin-top:3px}.block-toggle strong,.block-toggle small{display:block}.block-toggle small{font-size:11px;margin-top:3px}.progress-sheet .primary-button{width:100%;margin-top:22px}
.login-page{min-height:100vh;display:grid;place-items:center;padding:20px;background:linear-gradient(135deg,#f8fafc,#e2e8f0)}.login-card{width:min(440px,100%);background:#ffffffed;border:1px solid #fff;border-radius:24px;box-shadow:0 20px 40px #0f172a18;padding:34px}.login-brand{text-align:center;margin-bottom:28px}.login-brand .brand-mark{margin:auto}.login-brand h1{color:var(--primary);font-size:30px;margin:12px 0 2px}.login-brand p,.offline-note{color:var(--muted);font-size:13px}.login-card form label{display:block;font-size:12px;font-weight:700;margin:14px 0 7px}.login-card form input{width:100%;padding:13px;border:1px solid var(--line);border-radius:11px;outline:none}.login-card form input:focus{border-color:var(--blue);box-shadow:0 0 0 3px #1975c51a}.login-card .primary-button{width:100%;margin-top:20px}.login-error{background:#fef2f2;color:#b91c1c;border-radius:9px;padding:10px;margin-top:12px;font-size:12px}.login-divider{display:flex;align-items:center;gap:9px;color:#94a3b8;font-size:11px;margin:18px 0}.login-divider:before,.login-divider:after{content:"";height:1px;background:var(--line);flex:1}.microsoft-button{width:100%;background:#fff;color:var(--ink);border:1px solid var(--line);display:flex;align-items:center;justify-content:center;gap:10px}.microsoft-logo{width:18px;height:18px;display:grid;grid-template-columns:1fr 1fr;gap:2px}.microsoft-logo i:nth-child(1){background:#f35325}.microsoft-logo i:nth-child(2){background:#81bc06}.microsoft-logo i:nth-child(3){background:#05a6f0}.microsoft-logo i:nth-child(4){background:#ffba08}.offline-note{text-align:center;line-height:1.5;margin:20px 0 0}.callback{text-align:center}
.app-loading{height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;color:var(--primary)}.app-spinner{width:30px;height:30px;border:3px solid #dbe3e9;border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite}#blazor-error-ui{display:none}
@media(max-width:700px){.topbar{height:58px;padding:0 14px}.app-content{padding:20px 12px 90px}.field-heading{display:block}.sync-button{width:100%;margin-top:15px}.assignment-list{grid-template-columns:1fr}.status-strip{gap:10px;margin-top:15px}.progress-sheet{top:auto;bottom:0;height:auto;max-height:92vh;border-radius:22px 22px 0 0;padding:14px 18px 24px}.sheet-handle{display:block;width:42px;height:4px;border-radius:3px;background:#cbd5e1;margin:0 auto 15px}.login-card{padding:28px 22px}}