:root{--bg:#f8f9fc;--surface:#fff;--ink:#17213b;--muted:#647087;--line:#e3e7ef;--blue:#2855dc;--blue-soft:#edf2ff;--green:#147253;--green-soft:#e9f6ef;--amber:#926314;--amber-soft:#fff5df;--red:#b5343e;--shadow:0 10px 38px #25376b08;--radius:18px;--font:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:90px}body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.7 var(--font)}button,input,select,textarea{font:inherit}button,a,input,select,textarea{-webkit-tap-highlight-color:transparent}button,a{touch-action:manipulation}button{cursor:pointer}button:disabled{cursor:default;opacity:.55}a{color:var(--blue);text-decoration:none}a:hover{text-decoration:underline}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid #8ba7ff;outline-offset:3px}h1,h2,h3,h4,p{margin:0}h1{font-size:clamp(28px,4vw,42px);letter-spacing:-1.4px;line-height:1.3;font-weight:650}h2{font-size:22px;line-height:1.5;letter-spacing:-.5px;font-weight:650}h3{font-size:17px;line-height:1.5;font-weight:650}h4{font-size:15px;font-weight:650}img{max-width:100%}hr{height:1px;border:0;background:var(--line);margin:28px 0}[hidden]{display:none!important}.skip-link{position:absolute;left:12px;top:-100px;background:var(--surface);padding:10px;z-index:100}.skip-link:focus{top:12px}.topbar{height:76px;border-bottom:1px solid var(--line);background:#fffffff5;position:sticky;top:0;z-index:20;backdrop-filter:blur(16px)}.topbar-inner{max-width:1240px;height:100%;padding:0 32px;margin:auto;display:flex;align-items:center;gap:30px}.brand{display:flex;gap:10px;align-items:center;color:var(--ink);font-weight:650;font-size:17px;white-space:nowrap}.brand:hover{text-decoration:none}.brand img{width:31px;height:31px}.nav{display:flex;align-items:center;gap:6px}.nav a{color:var(--muted);font-size:14px;padding:8px 13px;border-radius:8px}.nav a.active{background:var(--blue-soft);color:var(--blue);font-weight:600}.nav a:hover{background:var(--bg);text-decoration:none}.user-menu{margin-left:auto;display:flex;gap:12px;align-items:center;min-width:0}.user-name{display:flex;gap:8px;align-items:center;color:var(--ink);max-width:190px;font-size:14px}.avatar{width:30px;height:30px;border-radius:50%;display:inline-grid;place-items:center;background:var(--blue-soft);color:var(--blue);flex-shrink:0;font-weight:600}.ellipsis{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.shell{max-width:1190px;margin:auto;padding:44px 32px 80px}.eyebrow{display:flex;align-items:center;gap:8px;font-size:12px;letter-spacing:1.8px;color:var(--blue);font-weight:650;text-transform:uppercase;margin-bottom:14px}.eyebrow:before{content:"";width:6px;height:6px;background:var(--blue);border-radius:50%}.muted{color:var(--muted)}.small{font-size:13px}.tiny{font-size:12px}.lead{color:var(--muted);margin-top:15px;max-width:670px;font-size:16px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:7px;min-height:42px;padding:9px 16px;border:1px solid var(--line);border-radius:10px;background:var(--surface);color:var(--ink);line-height:1.45;font-size:14px;font-weight:550;white-space:normal}.btn:hover{background:#f3f5f9;text-decoration:none}.btn-primary{background:var(--blue);color:#fff;border-color:var(--blue)}.btn-primary:hover{background:#2048c3}.btn-ghost{background:transparent;border-color:transparent;color:var(--muted)}.btn-danger{color:var(--red);border-color:#edced1}.btn-sm{min-height:34px;font-size:12px;padding:6px 11px}.actions{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.spacer{flex:1}.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow)}.section-head{display:flex;align-items:center;justify-content:space-between;gap:18px;margin-bottom:20px}.section-head p{margin-top:4px}.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:22px}.stack{display:grid;gap:22px}.hero{display:grid;grid-template-columns:1.45fr 1fr;gap:45px;align-items:center;margin-bottom:38px}.hero .actions{margin-top:24px}.progress-card{padding:26px 28px;position:relative;overflow:hidden}.progress-top{display:flex;justify-content:space-between;align-items:center}.progress-number{font-size:42px;letter-spacing:-2px;font-weight:650;line-height:1.3;margin:10px 0 17px}.progress-number span{font-size:17px;font-weight:400;letter-spacing:0;color:var(--muted)}.progress-track{height:7px;background:#edf0f5;overflow:hidden;border-radius:5px}.progress-fill{height:100%;background:var(--blue);transition:width .2s}.progress-foot{display:flex;justify-content:space-between;gap:12px;margin-top:15px;font-size:12px;color:var(--muted)}.status{display:inline-flex;align-items:center;gap:5px;border-radius:6px;padding:3px 8px;line-height:1.6;font-size:12px;font-weight:550;white-space:nowrap;background:#f0f2f6;color:var(--muted)}.status:before{content:"";width:5px;height:5px;background:currentColor;border-radius:50%}.status-complete{color:var(--green);background:var(--green-soft)}.status-submitted{color:var(--blue);background:var(--blue-soft)}.status-in_progress,.status-legacy_complete{color:var(--amber);background:var(--amber-soft)}.notice{display:flex;align-items:flex-start;gap:12px;padding:16px 19px;border-radius:12px;background:var(--blue-soft);color:#2c4882;margin:18px 0;font-size:14px}.notice p{flex:1}.notice.warning{background:var(--amber-soft);color:#795313}.notice.error{background:#fff0f1;color:var(--red)}.notice.success{background:var(--green-soft);color:var(--green)}.notice .actions{margin-top:10px}.phase-block{margin-top:24px;padding:25px 26px 27px}.phase-title{display:flex;gap:14px;align-items:center}.phase-index{width:40px;height:40px;display:grid;place-items:center;background:var(--blue-soft);color:var(--blue);border-radius:12px;font-size:15px;flex-shrink:0}.phase-title h3{font-size:18px}.phase-meta{margin-left:auto;color:var(--muted);font-size:13px;white-space:nowrap}.day-grid{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));gap:10px;margin-top:23px}.day-node{position:relative;display:flex;flex-direction:column;gap:8px;min-height:118px;padding:15px 12px;border:1px solid var(--line);border-radius:12px;color:var(--ink);background:#fff;transition:transform .15s,box-shadow .15s}.day-node:hover{text-decoration:none;transform:translateY(-2px);box-shadow:0 7px 20px #2855dc12;border-color:#a3b7f3}.day-node .day-num{font-size:12px;color:var(--muted);font-weight:600}.day-node strong{font-size:13px;line-height:1.5;font-weight:600}.day-node .node-bottom{margin-top:auto;font-size:11px;color:var(--muted)}.day-node.complete{background:#f7fcf9;border-color:#c9e7d7}.day-node.submitted{background:#f8faff;border-color:#cbd7fa}.day-node .check-dot{position:absolute;right:10px;top:12px;color:var(--green);font-weight:700}.day-node.next{border-color:var(--blue);box-shadow:0 0 0 1px var(--blue)}.phase-outcome{padding-top:18px;color:var(--muted);font-size:13px}.phase-outcome strong{color:var(--ink);font-weight:550;margin-right:8px}.bottom-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px;margin-top:28px}.field{display:flex;flex-direction:column;gap:7px;margin-bottom:18px}.field label{font-size:13px;font-weight:600}.field input,.field select,.field textarea{width:100%;border:1px solid #d6dce7;border-radius:9px;padding:10px 12px;background:#fff;color:var(--ink);min-height:43px}.field textarea{resize:vertical;min-height:130px}.field .help{font-size:12px;color:var(--muted)}.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}.error-text{color:var(--red);font-size:13px;margin:8px 0;white-space:pre-wrap}.save-state{font-size:12px;color:var(--muted)}.save-state.failed{color:var(--red)}.save-state.saved{color:var(--green)}.day-layout{display:grid;grid-template-columns:220px minmax(0,1fr);gap:38px}.day-sidebar{align-self:start;position:sticky;top:105px}.back-link{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--muted);margin-bottom:23px}.side-label{font-size:12px;color:var(--muted);margin:20px 0 9px}.side-days{display:grid;grid-template-columns:repeat(5,1fr);gap:6px}.side-days a{height:37px;display:grid;place-items:center;border:1px solid var(--line);border-radius:7px;background:#fff;font-size:12px;color:var(--muted)}.side-days a.active{background:var(--blue);color:white;border-color:var(--blue)}.side-days a.complete:not(.active){background:var(--green-soft);color:var(--green);border-color:#cee6d8}.side-days a.submitted:not(.active){background:var(--blue-soft);color:var(--blue)}.side-days a:hover{text-decoration:none;border-color:var(--blue)}.side-help{font-size:12px;color:var(--muted);line-height:1.8;margin-top:22px}.day-heading{margin-bottom:27px}.day-heading h1{font-size:34px}.day-meta{display:flex;align-items:center;gap:12px;margin-top:18px;flex-wrap:wrap;font-size:13px;color:var(--muted)}.why-box{background:#edf2ff;border-radius:14px;padding:23px 25px;margin:24px 0}.why-box h3{color:#254bbb;margin-bottom:8px}.why-box p{color:#334668}.content-block{margin-top:32px}.content-block>h2{font-size:20px;margin-bottom:17px}.list{list-style:none;padding:0;margin:0;display:grid;gap:11px}.list li{position:relative;padding-left:18px}.list li:before{content:"";position:absolute;left:2px;top:11px;width:5px;height:5px;border-radius:50%;background:#8c9ab1}.step-list{display:grid;gap:15px}.step{display:grid;grid-template-columns:35px 1fr;gap:14px;padding:23px;background:#fff;border:1px solid var(--line);border-radius:14px}.step-number{width:31px;height:31px;background:#f0f3fa;color:#56637c;display:grid;place-items:center;border-radius:50%;font-size:13px}.step-head{display:flex;gap:15px;align-items:baseline;justify-content:space-between;margin:2px 0 10px}.step-head span{font-size:12px;white-space:nowrap;color:var(--muted)}.step p{font-size:14px;white-space:pre-line}.step-result{font-size:13px;color:var(--muted);padding-top:12px;margin-top:12px;border-top:1px solid #edf0f5}.step-result strong{font-weight:550;color:var(--ink)}.deliverables{display:grid;gap:10px}.deliverable{padding:15px 17px;border:1px solid var(--line);border-radius:10px;background:#fff}.deliverable strong{font-size:14px;overflow-wrap:anywhere}.deliverable p{font-size:13px;color:var(--muted);margin-top:4px}.terms{display:grid;grid-template-columns:1fr 1fr;gap:12px}.term{padding:16px 18px;background:#f0f3f8;border-radius:10px}.term strong{font-size:13px}.term p{font-size:13px;color:var(--muted);margin-top:5px}.submission-card{margin-top:36px;border-top:3px solid var(--blue);padding:25px}.submission-header{display:flex;justify-content:space-between;align-items:flex-start;gap:14px;margin-bottom:20px}.submission-header p{margin-top:6px}.upload-area{border:1px dashed #bac8e6;border-radius:12px;background:#f9fbff;padding:22px;display:grid;gap:15px}.upload-area.drag-over{background:var(--blue-soft);border-color:var(--blue)}.upload-row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.upload-row select{min-height:40px;max-width:100%;border:1px solid var(--line);border-radius:9px;background:#fff;padding:8px 12px;font-size:13px}.upload-input{width:100%;font-size:13px}.upload-input::file-selector-button{border:1px solid #cad5eb;background:#fff;padding:9px 13px;color:var(--ink);border-radius:8px;margin-right:10px;cursor:pointer}.upload-progress{display:grid;gap:6px;color:var(--blue);font-size:13px}.file-list{display:grid;gap:8px;margin-top:15px}.file-row{display:grid;grid-template-columns:36px minmax(0,1fr) auto;gap:12px;align-items:center;border:1px solid var(--line);border-radius:10px;padding:12px}.file-icon{width:34px;height:40px;background:#eff3fb;display:grid;place-items:center;font-size:10px;font-weight:650;color:#6479a1;border-radius:5px}.file-name{font-size:13px;overflow-wrap:anywhere}.file-meta{font-size:11px;color:var(--muted);margin-top:3px}.checklist{display:grid;gap:10px;margin:17px 0}.check-item{display:flex;gap:10px;align-items:flex-start;font-size:14px;padding:12px;background:#f8f9fc;border-radius:9px;cursor:pointer}.check-item input{width:17px;height:17px;margin:4px 0 0;accent-color:var(--blue);flex-shrink:0}.complete-bar{display:flex;align-items:center;justify-content:space-between;gap:15px;border-top:1px solid var(--line);padding-top:20px;margin-top:21px;flex-wrap:wrap}.completion-date{font-size:13px;color:var(--green)}.history{margin-top:25px;border-top:1px solid var(--line);padding-top:18px}.history summary{cursor:pointer;font-size:13px;color:var(--muted)}.history-list{list-style:none;padding:10px 0 0;margin:0;display:grid;gap:11px;font-size:12px}.history-list li{display:flex;gap:10px;justify-content:space-between}.history-list time{color:var(--muted);flex-shrink:0}.lesson-footer{display:flex;justify-content:space-between;margin-top:27px;gap:16px}.lesson-footer a{font-size:13px}.practice-box{background:#f2f5fa;border-radius:12px;padding:20px 23px;font-size:14px}.practice-box p{margin:8px 0 15px}.practice-links{display:flex;gap:10px;flex-wrap:wrap;font-size:12px}.practice-links a{border:1px solid #dae1ee;background:#fff;border-radius:6px;padding:4px 9px}.auth-layout{max-width:1080px;margin:72px auto;padding:0 30px;display:grid;grid-template-columns:1fr 1fr;gap:85px;align-items:center}.auth-story h1{font-size:43px;line-height:1.35}.auth-story .brand{margin-bottom:34px}.auth-story .lead{font-size:15px}.auth-points{display:grid;gap:17px;margin-top:32px;font-size:14px;color:var(--muted)}.auth-points strong{color:var(--ink);font-weight:550}.auth-point{display:flex;gap:12px}.auth-point span:first-child{color:var(--blue)}.auth-card{padding:32px;box-shadow:var(--shadow)}.auth-card h2{font-size:25px;margin-bottom:8px}.auth-card form{margin-top:26px}.auth-card .btn-primary{width:100%}.auth-foot{font-size:12px;color:var(--muted);margin-top:22px;padding-top:18px;border-top:1px solid var(--line)}.table-wrap{overflow-x:auto}.table{border-collapse:collapse;width:100%;font-size:13px}.table th{text-align:left;font-size:12px;color:var(--muted);font-weight:500;padding:13px 12px;border-bottom:1px solid var(--line);white-space:nowrap}.table td{padding:16px 12px;border-bottom:1px solid #edf0f5;vertical-align:middle}.table tr:last-child td{border-bottom:0}.table th:first-child,.table td:first-child{padding-left:0}.table td .actions{gap:5px}.table td strong{font-weight:550}.table td .muted{font-size:12px}.admin-intro{margin-bottom:30px}.admin-grid{display:grid;grid-template-columns:minmax(0,1fr) 310px;gap:24px;align-items:start}.admin-form{position:sticky;top:102px}.legacy-files{display:flex;gap:12px;flex-wrap:wrap;margin:16px 0}.legacy-day{padding:16px 20px;border:1px solid var(--line);border-radius:10px;min-width:140px}.legacy-day strong{display:block;font-size:18px}.legacy-day p{font-size:12px;color:var(--muted)}.form-message{margin-top:12px;font-size:13px;min-height:0}.user-progress{display:grid;grid-template-columns:repeat(10,1fr);gap:7px;margin-top:14px}.user-progress a{border:1px solid var(--line);border-radius:8px;padding:9px 5px;text-align:center;font-size:12px;color:var(--muted);background:white}.user-progress a.complete{background:var(--green-soft);color:var(--green);border-color:#cce4d7}.user-progress a.submitted{background:var(--blue-soft);color:var(--blue)}.user-progress a:hover{text-decoration:none;border-color:var(--blue)}.account-shell{max-width:780px}.user-dialog{width:min(480px,calc(100% - 32px));border:1px solid var(--line);border-radius:18px;padding:27px;color:var(--ink);box-shadow:0 24px 80px #19285024}.user-dialog::backdrop{background:#15233e55;backdrop-filter:blur(3px)}.user-dialog h2{margin-bottom:20px}.empty{padding:20px;text-align:center;font-size:13px;color:var(--muted);background:#f7f9fc;border-radius:10px}.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);padding:12px 20px;background:#20304a;color:#fff;border-radius:11px;font-size:14px;box-shadow:0 8px 35px #24345422;z-index:100;max-width:calc(100% - 32px);overflow-wrap:anywhere}.loading-screen{min-height:65vh;display:flex;justify-content:center;align-items:center;gap:12px;color:var(--muted)}.loading-dot{width:10px;height:10px;background:var(--blue);border-radius:50%;animation:pulse 1s ease infinite}.footer-note{font-size:12px;color:var(--muted);text-align:center;margin-top:35px}.offline-error{max-width:540px;margin:90px auto;padding:30px}.readonly-banner{margin:0 0 25px}.file-preview{width:min(900px,calc(100% - 30px));border:0;border-radius:16px;padding:18px}.file-preview::backdrop{background:#132039ad}.file-preview header{display:flex;justify-content:space-between;gap:10px;align-items:center;padding-bottom:12px}.file-preview img{display:block;max-height:75vh;max-width:100%;margin:auto}.file-preview .file-name{font-size:14px}.auth-banner{margin-top:16px}.schedule-preview{margin-top:16px;font-size:13px;color:var(--muted)}.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}
@keyframes pulse{50%{opacity:.3}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;animation:none!important;transition:none!important}}
@media(max-width:1050px){.topbar-inner{padding:0 24px;gap:20px}.shell{padding:34px 24px 70px}.hero{gap:25px}.day-grid{grid-template-columns:repeat(4,minmax(0,1fr))}.day-layout{grid-template-columns:175px minmax(0,1fr);gap:24px}.side-days{grid-template-columns:repeat(4,1fr)}.auth-layout{gap:40px}.admin-grid{grid-template-columns:1fr}.admin-form{position:static}.user-progress{grid-template-columns:repeat(10,1fr)}}
@media(max-width:740px){.topbar{height:auto;min-height:68px}.topbar-inner{padding:14px 18px;gap:10px;flex-wrap:wrap}.brand{font-size:15px}.brand img{width:28px;height:28px}.nav{order:3;flex-basis:100%;border-top:1px solid #eef1f6;padding-top:9px;margin-top:2px}.nav a{padding:5px 10px;font-size:13px}.user-menu{gap:4px}.user-name{max-width:120px;font-size:12px}.user-menu>.btn{font-size:12px;padding:7px 8px}.shell{padding:28px 18px 55px}.hero{grid-template-columns:1fr;gap:24px}.hero h1{font-size:32px}.lead{font-size:14px}.progress-card{padding:21px 23px}.progress-number{font-size:35px;margin:6px 0 14px}.progress-foot{font-size:11px}.bottom-grid,.grid-2{grid-template-columns:1fr}.phase-block{padding:20px 16px}.phase-title{gap:10px;flex-wrap:wrap}.phase-title h3{font-size:16px}.phase-title .muted{font-size:11px}.phase-index{width:33px;height:33px;border-radius:9px}.phase-meta{font-size:11px}.day-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;margin-top:20px}.day-node{min-height:108px;padding:12px 10px}.day-node strong{font-size:12px}.day-node .status{font-size:10px;padding:2px 4px;align-self:flex-start;white-space:normal}.day-node .node-bottom{font-size:10px}.phase-outcome{font-size:12px}.day-layout{display:block}.day-sidebar{position:static;margin-bottom:25px}.day-sidebar .back-link{margin-bottom:12px}.day-sidebar .side-label,.day-sidebar .side-help{display:none}.side-days{grid-template-columns:repeat(10,1fr);gap:4px}.side-days a{height:29px;font-size:10px;border-radius:5px}.day-heading h1{font-size:28px;letter-spacing:-.8px}.day-meta{font-size:12px;gap:9px}.why-box{padding:19px}.why-box p{font-size:14px}.step{padding:18px 15px;grid-template-columns:27px 1fr;gap:10px}.step-number{width:26px;height:26px;font-size:12px}.step-head h3{font-size:15px}.step-head{gap:8px}.step-head span{font-size:11px}.step p{font-size:13px}.terms{grid-template-columns:1fr}.submission-card{padding:20px 16px}.submission-header{flex-direction:column;gap:8px}.upload-area{padding:17px}.file-row{grid-template-columns:27px minmax(0,1fr);gap:10px}.file-icon{width:27px;height:32px;font-size:8px}.file-row>.actions{grid-column:2}.check-item{font-size:13px}.history-list li{flex-direction:column;gap:2px}.history-list time{font-size:11px}.complete-bar{align-items:stretch}.complete-bar .btn-primary{width:100%}.auth-layout{display:block;margin:30px auto;padding:0 20px}.auth-story{margin-bottom:26px}.auth-story .brand{margin-bottom:22px}.auth-story h1{font-size:31px}.auth-story .lead{font-size:14px}.auth-points{display:none}.auth-card{padding:25px 22px}.card{padding:22px 18px}.section-head{align-items:flex-start;gap:12px}.section-head h2{font-size:20px}.form-row{grid-template-columns:1fr;gap:0}.user-progress{grid-template-columns:repeat(6,1fr)}.notice{padding:14px;font-size:13px;flex-wrap:wrap}.table th,.table td{padding:12px 9px}.table{min-width:620px}.account-shell h1{font-size:30px}}
.section-head>.tiny{white-space:nowrap}.side-days a{scroll-margin-top:140px}@media(max-width:740px){.phase-title>div{flex:1;min-width:0}.phase-meta{flex-basis:100%;padding-left:43px}}