:root{--navy:#17324d;--ink:#172d40;--muted:#627282;--line:#dce3e9;--teal:#087e78;--pale:#f3f7fa;--red:#b42938;color-scheme:light;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei","PingFang SC",sans-serif;font-size:16px;color:var(--ink)}
*{box-sizing:border-box}body{margin:0;background:#fff}button,input,textarea{font:inherit}button,a,label,input,textarea{-webkit-tap-highlight-color:transparent}a{color:var(--teal);text-underline-offset:4px}button,a,input,textarea{outline-offset:4px}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible{outline:3px solid #31a8c0}button{cursor:pointer}button:disabled{opacity:.6;cursor:wait}[hidden]{display:none!important}.page-shell{display:grid;grid-template-columns:minmax(300px,32%) 1fr;min-height:100vh}.course-rail{background:var(--navy);color:white;padding:38px 42px;display:flex;flex-direction:column;position:sticky;top:0;height:100vh;min-height:700px}.brand{display:inline-flex;align-items:center;gap:13px;color:white;text-decoration:none;font-weight:650;letter-spacing:.04em;font-size:1.05rem;line-height:1.6}.brand-mark{width:38px;height:38px;border:1px solid #91aec5;border-radius:9px;display:inline-flex;align-items:center;justify-content:center;font-size:.9rem;font-weight:700;letter-spacing:0;flex-shrink:0}.rail-main{margin:auto 0}.eyebrow{font-size:.9rem;line-height:1.7;font-weight:600;color:#b3d3dd;margin:0 0 16px}.eyebrow.dark{color:var(--teal)}.rail-main h1{font-size:clamp(2rem,3.2vw,3rem);line-height:1.38;letter-spacing:.02em;font-weight:650;margin:0 0 20px}.rail-description{font-size:1rem;line-height:1.8;color:#c1d2df;max-width:260px}.rail-steps{padding:0;list-style:none;margin:40px 0}.rail-steps li{font-size:1rem;display:flex;align-items:center;gap:16px;padding:15px 0;border-bottom:1px solid #355069}.rail-steps span{font-size:.9rem;color:#7edbd1;font-variant-numeric:tabular-nums}.rail-bottom{font-size:.9rem;line-height:1.8;color:#bacee0}.rail-bottom a{color:#d8e9f4;display:inline-block;margin-top:4px}.form-main{width:100%;max-width:960px;padding:44px clamp(28px,5vw,76px) 24px}.form-heading{margin-bottom:30px}.form-heading .eyebrow{margin-bottom:4px}h2{font-size:2rem;line-height:1.4;font-weight:650;margin:0 0 12px}.form-heading p:last-child{font-size:.95rem;color:var(--muted);margin:0;line-height:1.7}fieldset{border:0;margin:0 0 29px;padding:0;min-width:0}legend{font-size:1.14rem;font-weight:650;display:flex;align-items:center;gap:12px;padding:0;margin-bottom:17px;line-height:1.6}.section-number{font-size:.84rem;font-weight:700;color:var(--teal);font-variant-numeric:tabular-nums}.identity-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px 20px}.class-field{grid-column:1/-1}.field{min-width:0}.field label{display:block;font-size:.94rem;font-weight:600;margin-bottom:8px;line-height:1.6}input:not([type=file]):not([type=hidden]),textarea{border:1px solid #bdcbd5;border-radius:7px;background:#fff;width:100%;padding:12px 14px;min-height:48px;color:var(--ink);transition:border-color .15s,box-shadow .15s;line-height:1.6}input::placeholder,textarea::placeholder{color:#73828f;font-size:.9rem}textarea{resize:vertical;min-height:112px}input:focus,textarea:focus{border-color:var(--teal);box-shadow:0 0 0 3px #dff1ee;outline:0}input[aria-invalid=true],textarea[aria-invalid=true]{border-color:var(--red)}.field-help{font-size:.88rem;color:var(--muted);line-height:1.8;margin:9px 0 0}.field-error{color:var(--red);font-size:.88rem;line-height:1.6;margin:5px 0 0;overflow-wrap:anywhere}.field-error:empty{display:none}.link-state{font-size:.88rem;color:var(--teal);line-height:1.6;margin:6px 0 0;overflow-wrap:anywhere}.link-state:empty{display:none}.upload-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.upload-card{border:1px dashed #b8c8d4;border-radius:8px;background:#fafcfd;padding:18px 16px;min-width:0;position:relative;transition:border-color .15s,background .15s}.upload-card:focus-within{outline:3px solid #31a8c0;outline-offset:3px}.upload-card.dragging{border-color:var(--teal);background:#eaf6f3}.upload-label{display:flex;align-items:flex-start;flex-direction:column;cursor:pointer;min-height:144px}.upload-label svg{width:30px;height:30px;color:var(--teal);margin-bottom:10px}.upload-title{font-weight:650;font-size:1rem;margin-bottom:7px;line-height:1.6}.upload-hint{font-size:.88rem;color:var(--muted);line-height:1.7}.file-rule{font-size:.88rem;color:var(--muted);margin-top:9px;line-height:1.7}.file-input{position:absolute;width:1px;height:1px;opacity:0;bottom:24px;left:24px}.file-selected{border-top:1px solid var(--line);padding-top:10px;margin-top:10px;display:flex;flex-wrap:wrap;align-items:center;gap:6px 10px;font-size:.86rem}.selected-name{font-weight:600;overflow-wrap:anywhere;flex-basis:100%}.selected-size{color:var(--muted)}.remove-file{background:none;border:0;color:var(--red);padding:3px 0;font-size:.86rem}.submit-row{display:flex;align-items:center;justify-content:space-between;gap:20px;border-top:1px solid var(--line);padding-top:22px}.submit-row p{font-size:.88rem;color:var(--muted);line-height:1.7;margin:0}.primary-button,.secondary-button{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:12px 24px;border-radius:7px;font-size:.96rem;line-height:1.5;font-weight:600;text-decoration:none;border:1px solid transparent;white-space:nowrap}.primary-button{background:var(--teal);color:white}.primary-button:hover{background:#086761}.secondary-button{background:white;border-color:#bdcbd5;color:var(--ink)}.secondary-button:hover{background:var(--pale)}.error-banner{padding:13px 15px;border:1px solid #e9b9c0;background:#fff5f6;border-radius:7px;color:var(--red);font-size:.95rem;line-height:1.7;margin:18px 0;overflow-wrap:anywhere}.progress-box{margin:20px 0}.progress-text{display:flex;justify-content:space-between;gap:16px;font-size:.9rem;margin-bottom:8px;color:var(--muted)}progress{width:100%;height:9px;accent-color:var(--teal);border-radius:8px}.page-footer{font-size:.82rem;color:#748491;border-top:1px solid var(--line);margin-top:36px;padding-top:19px;line-height:1.6}.success-panel{padding:28px 0 16px}.success-mark{display:flex;align-items:center;justify-content:center;width:62px;height:62px;border-radius:50%;background:#e1f3ed;color:var(--teal);font-size:2rem;margin-bottom:26px}.success-panel>p{color:var(--muted);line-height:1.8}.success-panel .eyebrow{color:var(--teal);margin-bottom:8px}.receipt{background:var(--pale);border-left:3px solid var(--teal);padding:20px 22px;margin:26px 0;display:flex;flex-direction:column;gap:10px}.receipt span{font-size:.9rem;color:var(--muted)}.receipt strong{font-size:1.6rem;letter-spacing:.08em;overflow-wrap:anywhere}dl{font-size:.95rem;line-height:1.8}dt{color:var(--muted);margin-top:12px}dd{margin:2px 0 0;overflow-wrap:anywhere}.success-panel button{margin-top:22px}.admin-body{background:#f7f9fb}.admin-header{padding:24px 5%;display:flex;justify-content:space-between;gap:24px;align-items:center;background:white;border-bottom:1px solid var(--line)}.dark-brand{color:var(--navy)}.dark-brand .brand-mark{border-color:var(--navy);background:var(--navy);color:white}.admin-header>a:last-child{font-size:.95rem}.login-card{max-width:480px;margin:70px auto;padding:38px;background:white;border:1px solid var(--line);border-radius:10px}.login-card h1{font-size:2rem;margin:0 0 12px}.login-card>p{font-size:.95rem;color:var(--muted);line-height:1.8}.login-card form{margin-top:24px}.login-card .primary-button{width:100%;margin-top:22px}.admin-main{max-width:1500px;margin:auto;padding:38px 5%}.admin-heading{display:flex;align-items:flex-start;justify-content:space-between;gap:20px}.admin-heading h1{font-size:2rem;line-height:1.5;margin:0 0 10px}.admin-heading p{font-size:.95rem;color:var(--muted);line-height:1.7}.admin-heading .eyebrow{color:var(--teal);margin-bottom:4px}.text-button{color:var(--muted);background:none;border:0;padding:12px;font-size:.95rem}.admin-toolbar{display:flex;flex-wrap:wrap;gap:12px;margin:22px 0}.admin-note{font-size:.9rem;color:var(--muted);line-height:1.8}.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:8px;background:white;margin-top:20px}table{width:100%;border-collapse:collapse;text-align:left;font-size:.9rem;line-height:1.7;min-width:930px}th{font-weight:650;color:var(--navy);background:#edf2f6}th,td{padding:17px 18px;vertical-align:top;border-bottom:1px solid var(--line)}tbody tr:last-child td{border-bottom:0}td a{display:inline-block;max-width:210px;overflow-wrap:anywhere}.cell-secondary{display:block;color:var(--muted);font-size:.84rem;margin-top:4px}.empty-state{padding:50px 30px;text-align:center;border:1px solid var(--line);background:#fff;border-radius:8px;margin-top:20px}.empty-state h2{font-size:1.3rem}.empty-state p{font-size:.95rem;color:var(--muted);line-height:1.8}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
@media(min-width:1650px){.form-main{margin:0 auto}}@media(max-width:1000px){.page-shell{grid-template-columns:280px 1fr}.course-rail{padding:30px 25px}.form-main{padding:36px 28px 24px}.rail-main h1{font-size:2rem}.upload-grid{grid-template-columns:1fr}.upload-label{min-height:100px}.upload-hint{line-height:1.7}.rail-steps{margin:25px 0}}
@media(max-width:720px){.page-shell{display:block}.course-rail{height:auto;min-height:0;position:static;padding:20px 24px}.rail-main{margin:20px 0 0}.rail-main h1{font-size:1.65rem;margin-bottom:7px}.rail-main h1 br{display:none}.rail-main .eyebrow{font-size:.88rem;margin-bottom:8px}.rail-description{max-width:none;font-size:.9rem;margin:0}.rail-steps{display:none}.rail-bottom{display:none}.form-main{max-width:none;padding:27px 24px 20px}.form-heading{margin-bottom:24px}.form-heading h2{font-size:1.65rem}.identity-grid{grid-template-columns:1fr;gap:15px}.class-field{grid-column:auto}.upload-grid{grid-template-columns:1fr;gap:14px}.upload-label{min-height:110px}fieldset{margin-bottom:26px}.submit-row{align-items:stretch;flex-direction:column;gap:16px}.submit-row button{width:100%}.receipt strong{font-size:1.2rem}.admin-header{padding:20px;align-items:flex-start;flex-direction:column;gap:12px}.login-card{margin:28px 20px;padding:26px}.admin-main{padding:28px 20px}.admin-toolbar{align-items:stretch}.admin-toolbar>*{flex:1 1 auto;white-space:normal}.admin-heading h1{font-size:1.6rem}.page-footer{margin-top:27px}}
@media(prefers-reduced-motion:reduce){*{transition:none!important}}
.required-tag,.optional-tag{display:inline-block;font-size:.78rem;font-weight:500;margin-left:6px;padding:1px 7px;border-radius:4px;background:#edf2f7;color:#516b80}.required-tag{color:#0a6a63;background:#e7f4f1}.optional-link{margin-top:20px}.requirements-box{margin-top:18px;padding:18px 20px;background:#f3f7fa;border:1px solid var(--line);border-radius:8px;font-size:.9rem;line-height:1.8}.requirements-box h3{font-size:.97rem;margin:0 0 8px}.requirements-box ul{padding-left:20px;margin:8px 0}.requirements-box li{margin:7px 0}.requirements-box p{color:var(--muted);margin:12px 0 0}.prompt-preview{font-family:inherit;white-space:pre-wrap;overflow-wrap:anywhere;max-height:340px;overflow-y:auto;max-width:380px;min-width:200px;background:#f3f7fa;padding:12px;font-size:.88rem;line-height:1.7;border:1px solid var(--line);border-radius:6px}summary{cursor:pointer;color:var(--teal)}