/* ATELIER / shared offline interface system */
:root{color-scheme:dark;--bg:#080e1b;--panel:#0e1829;--panel2:#111e31;--panel3:#16253c;--text:#f0f5ff;--muted:#91a5bd;--soft:#627993;--line:rgba(181,208,245,.13);--line2:rgba(181,208,245,.22);--accent:#a99bff;--accent-rgb:169,155,255;--accent2:#e1d6ff;--success:#54dec0;--danger:#ff908c;--warning:#ffc879;--radius:18px;--shadow:0 24px 70px rgba(0,0,0,.26)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:radial-gradient(circle at 84% -6%,rgba(var(--accent-rgb),.13),transparent 33%),var(--bg);color:var(--text);font-family:Inter,"SF Pro Display","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;font-size:14px;line-height:1.65;-webkit-font-smoothing:antialiased}button,input,textarea,select{font:inherit}button{cursor:pointer}a{color:inherit;text-decoration:none}a:hover{text-decoration:underline}::selection{background:rgba(var(--accent-rgb),.35)}:focus-visible{outline:2px solid var(--accent);outline-offset:3px}::-webkit-scrollbar{width:9px;height:9px}::-webkit-scrollbar-thumb{background:#30415c;border-radius:10px}::-webkit-scrollbar-track{background:transparent}
.app{display:grid;grid-template-columns:238px minmax(0,1fr);min-height:100vh}.sidebar{position:sticky;top:0;height:100vh;background:rgba(9,17,31,.95);border-right:1px solid var(--line);padding:27px 16px 19px;display:flex;flex-direction:column;gap:24px;z-index:8}.brand{display:flex;align-items:center;gap:11px;padding:2px 10px}.brand-mark{width:36px;height:36px;display:grid;place-items:center;background:linear-gradient(145deg,var(--accent),rgba(var(--accent-rgb),.5));color:#091021;border-radius:11px;box-shadow:0 8px 26px rgba(var(--accent-rgb),.19)}.brand-name{font-weight:800;letter-spacing:-.6px;font-size:16px}.brand-sub{font-size:10px;color:var(--muted);letter-spacing:1.65px;text-transform:uppercase;line-height:1}.sidebar-course{padding:18px 15px;background:linear-gradient(150deg,rgba(var(--accent-rgb),.12),rgba(18,31,48,.38));border:1px solid var(--line);border-radius:16px}.sidebar-course .tiny{font-size:10px;letter-spacing:1.8px;color:var(--accent);font-weight:700}.sidebar-course h2{font-size:18px;line-height:1.5;margin:8px 0}.sidebar-course p{font-size:12px;line-height:1.7;color:var(--muted);margin:0}.sidebar-head{font-size:11px;color:var(--soft);font-weight:700;letter-spacing:2px;margin:0 12px 6px}.nav-list{display:grid;gap:5px}.nav-item{display:flex;align-items:center;gap:12px;text-align:left;width:100%;padding:12px 13px;background:transparent;color:var(--muted);border:1px solid transparent;border-radius:11px;font-weight:600;font-size:13px;transition:.18s}.nav-item svg{width:17px;height:17px;flex-shrink:0}.nav-item:hover{background:rgba(255,255,255,.045);color:#fff}.nav-item.is-active{background:rgba(var(--accent-rgb),.12);color:var(--accent2);border-color:rgba(var(--accent-rgb),.20)}.nav-item.is-active:after{content:"";width:5px;height:5px;border-radius:99px;background:var(--accent);margin-left:auto}.sidebar-foot{margin-top:auto;padding:15px;border-top:1px solid var(--line);font-size:11px;color:var(--soft);line-height:1.85}.sidebar-foot strong{color:var(--muted)}.green-dot{display:inline-block;width:7px;height:7px;border-radius:9px;background:var(--success);box-shadow:0 0 0 4px rgba(84,222,192,.12);margin-right:8px}
.shell{min-width:0}.topbar{min-height:75px;display:flex;justify-content:space-between;gap:16px;align-items:center;padding:18px clamp(20px,4vw,60px);border-bottom:1px solid var(--line);background:rgba(9,17,32,.52)}.breadcrumb{display:flex;align-items:center;gap:9px;color:var(--muted);font-size:12px}.breadcrumb b{color:#fff}.top-actions{display:flex;gap:8px;align-items:center;flex-wrap:wrap}.content{max-width:1600px;padding:27px clamp(18px,4vw,60px) 55px;margin:auto}.hero{position:relative;min-height:286px;overflow:hidden;border:1px solid rgba(var(--accent-rgb),.22);border-radius:24px;background:linear-gradient(110deg,rgba(13,25,43,.99) 12%,rgba(12,22,39,.87) 43%,rgba(12,22,39,.07) 95%),url('assets/hero.jpg') center right/cover no-repeat;box-shadow:var(--shadow);padding:33px clamp(25px,4vw,48px);display:flex;align-items:center}.hero:before{content:"";position:absolute;inset:0;pointer-events:none;background:radial-gradient(circle at 18% 8%,rgba(var(--accent-rgb),.14),transparent 56%)}.hero-inner{position:relative;z-index:1;max-width:690px}.hero-kicker{display:inline-flex;align-items:center;gap:8px;background:rgba(var(--accent-rgb),.12);border:1px solid rgba(var(--accent-rgb),.27);color:var(--accent2);border-radius:30px;padding:5px 12px;font-size:10px;letter-spacing:1.2px;font-weight:800}.hero h1{font-size:clamp(27px,3.1vw,45px);letter-spacing:-1.2px;line-height:1.26;margin:15px 0 11px;font-weight:850}.hero h1 .em{color:var(--accent2)}.hero p{font-size:14px;max-width:580px;color:#c5d0e1;margin:0;line-height:1.9}.hero-cta{display:flex;flex-wrap:wrap;gap:10px;margin-top:23px}.hero-decoration{position:absolute;right:18px;bottom:15px;color:rgba(255,255,255,.5);font-size:10px;letter-spacing:1.4px}.metric-row{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin:17px 0 29px}.metric{position:relative;background:var(--panel);border:1px solid var(--line);padding:18px 20px;border-radius:16px;overflow:hidden}.metric:before{content:"";position:absolute;inset:auto 0 0;height:2px;background:linear-gradient(90deg,var(--accent),transparent);opacity:.3}.metric-label{display:flex;align-items:center;gap:7px;font-size:11px;color:var(--muted);margin-bottom:8px}.metric-label svg{width:15px;height:15px;color:var(--accent)}.metric-value{font-size:23px;letter-spacing:-.5px;font-weight:800;line-height:1.2}.metric-desc{font-size:10px;color:var(--soft);margin-top:4px}.section-head{display:flex;justify-content:space-between;align-items:end;gap:16px;margin:12px 0 15px}.eyebrow{font-size:10px;font-weight:800;letter-spacing:2.2px;color:var(--accent);text-transform:uppercase}.section-head h2{margin:3px 0 0;font-size:23px;letter-spacing:-.5px}.section-head p{margin:4px 0 0;font-size:12px;color:var(--muted)}.work-grid{display:grid;grid-template-columns:minmax(0,1fr) 288px;align-items:start;gap:16px}.work-column,.insight-column{min-width:0}.panel{background:linear-gradient(150deg,rgba(18,31,50,.94),rgba(12,23,39,.97));border:1px solid var(--line);border-radius:18px;box-shadow:0 10px 36px rgba(0,0,0,.12)}.panel-head{padding:19px 23px 16px;border-bottom:1px solid var(--line)}.panel-title{display:flex;align-items:center;gap:10px;font-size:15px;font-weight:750}.panel-title .ico{color:var(--accent)}.panel-sub{font-size:12px;color:var(--muted);margin:4px 0 0}.panel-body{padding:21px 23px}.insight-column{display:grid;gap:13px}.insight-card{padding:20px}.insight-card h3{font-size:13px;font-weight:750;margin:0 0 12px}.insight-card p{color:var(--muted);font-size:12px;margin:7px 0}.side-list{list-style:none;margin:0;padding:0;display:grid;gap:10px}.side-list li{display:flex;gap:10px;align-items:flex-start;color:var(--muted);font-size:12px}.side-list li svg{width:15px;height:15px;flex-shrink:0;margin-top:2px;color:var(--accent)}.tip-card{background:linear-gradient(135deg,rgba(var(--accent-rgb),.12),rgba(var(--accent-rgb),.025));border:1px solid rgba(var(--accent-rgb),.2)}.tip-title{font-size:11px;color:var(--accent2);font-weight:800;letter-spacing:.6px}.small{font-size:12px;color:var(--muted)}.tiny{font-size:11px;color:var(--muted)}.muted{color:var(--muted)}.soft{color:var(--soft)}.strong{color:var(--text);font-weight:750}.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}.num{font-variant-numeric:tabular-nums}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:10px;padding:10px 15px;border:1px solid var(--line2);background:rgba(255,255,255,.04);color:var(--text);font-weight:700;font-size:12px;transition:background .2s,transform .12s,border-color .2s;min-height:39px}.btn svg{width:16px;height:16px}.btn:hover{background:rgba(255,255,255,.09);border-color:rgba(var(--accent-rgb),.35)}.btn:active{transform:translateY(1px)}.btn-primary{background:var(--accent);border-color:var(--accent);color:#0a1221;box-shadow:0 6px 25px rgba(var(--accent-rgb),.18)}.btn-primary:hover{background:var(--accent2);border-color:var(--accent2)}.btn-ghost{background:transparent;border-color:transparent;color:var(--muted)}.btn-ghost:hover{color:#fff}.btn-danger{border-color:rgba(255,144,140,.35);color:var(--danger)}.btn-sm{padding:7px 10px;min-height:32px;font-size:11px}.btn:disabled{opacity:.4;cursor:not-allowed;transform:none}.link-button{border:none;background:none;color:var(--accent2);font-size:12px;padding:3px;cursor:pointer}.link-button:hover{text-decoration:underline}.btn-group{display:flex;flex-wrap:wrap;gap:8px}.subtabs{display:flex;gap:6px;padding:5px;background:rgba(0,0,0,.16);border:1px solid var(--line);border-radius:13px;flex-wrap:wrap}.subtab{padding:8px 14px;border:0;border-radius:9px;background:none;color:var(--muted);font-size:12px;font-weight:650;transition:.18s}.subtab:hover{color:#fff}.subtab.active{background:rgba(var(--accent-rgb),.17);color:var(--accent2);box-shadow:0 1px 10px rgba(0,0,0,.14)}.pill{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--line2);border-radius:99px;padding:3px 9px;font-size:10px;color:var(--muted);font-weight:700}.pill.accent{border-color:rgba(var(--accent-rgb),.32);color:var(--accent2);background:rgba(var(--accent-rgb),.085)}.pill.success{color:var(--success);border-color:rgba(84,222,192,.27);background:rgba(84,222,192,.06)}.pill.warning{color:var(--warning);border-color:rgba(255,200,121,.27)}.pill.danger{color:var(--danger);border-color:rgba(255,144,140,.27)}
.grid2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.grid3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.stack{display:grid;gap:13px}.row{display:flex;align-items:center;gap:12px}.row-between{display:flex;align-items:center;justify-content:space-between;gap:12px}.divider{height:1px;background:var(--line);margin:17px 0}.form-label{display:block;margin-bottom:7px;font-size:11px;color:var(--muted);font-weight:700}.field,.area,.select{width:100%;background:#0a1425;border:1px solid var(--line2);border-radius:11px;color:var(--text);padding:12px 13px;outline:none;transition:.2s}.field:focus,.area:focus,.select:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(var(--accent-rgb),.09)}.area{resize:vertical;line-height:1.85;min-height:120px}.field::placeholder,.area::placeholder{color:#60738c}.select{appearance:none;cursor:pointer}.text-editor{min-height:285px;font-family:Georgia,'Times New Roman',serif;font-size:15px;line-height:2;color:#e7eefc;letter-spacing:.1px}.range-wrap{display:grid;grid-template-columns:105px 1fr 56px;align-items:center;gap:12px;margin:11px 0}.range-wrap label{font-size:12px;color:var(--muted)}.range-wrap output{text-align:right;font-variant-numeric:tabular-nums;color:var(--accent2);font-size:12px;font-weight:750}input[type=range]{width:100%;accent-color:var(--accent);cursor:pointer}.checkrow{display:flex;align-items:center;gap:8px;color:var(--muted);font-size:12px;cursor:pointer}input[type=checkbox]{accent-color:var(--accent);cursor:pointer;width:15px;height:15px}.radio{accent-color:var(--accent)}.statbox{background:rgba(5,13,25,.55);border:1px solid var(--line);border-radius:13px;padding:14px}.statbox .big{font-size:25px;line-height:1.2;font-weight:800;margin:4px 0}.statbox .cap{font-size:11px;color:var(--muted)}.chartbox{background:rgba(3,13,27,.54);border:1px solid var(--line);border-radius:16px;padding:13px;overflow:hidden}.chartbox svg{width:100%;height:auto;display:block}.note{border-radius:12px;padding:12px 14px;background:rgba(var(--accent-rgb),.08);border:1px solid rgba(var(--accent-rgb),.18);font-size:12px;color:#c5d1e3;line-height:1.85}.note.warning{background:rgba(255,200,121,.055);border-color:rgba(255,200,121,.20);color:#dfc7a1}.note.error{background:rgba(255,144,140,.07);border-color:rgba(255,144,140,.28);color:#ffd2d0}.note.success{background:rgba(84,222,192,.07);border-color:rgba(84,222,192,.27);color:#b4f3e3}.checkpoint{display:flex;align-items:center;gap:11px;padding:12px;border:1px solid var(--line);border-radius:12px;background:rgba(6,15,28,.4)}.checkpoint .stepno{display:grid;place-items:center;border:1px solid var(--line2);background:rgba(var(--accent-rgb),.12);color:var(--accent2);min-width:28px;height:28px;border-radius:8px;font-weight:800;font-size:12px}.checkpoint p{margin:0;color:var(--muted);font-size:12px}.checkpoint b{display:block;color:#edf3ff;font-size:12px}.progress{height:7px;background:#26364f;border-radius:30px;overflow:hidden}.progress>span{display:block;height:100%;background:linear-gradient(90deg,var(--accent),var(--success));transition:width .25s}.answer-option{position:relative;display:flex;align-items:flex-start;gap:12px;text-align:left;width:100%;border:1px solid var(--line);border-radius:12px;padding:13px 14px;background:rgba(7,17,31,.6);color:var(--text);font-size:13px;line-height:1.75;transition:.18s}.answer-option:hover{background:rgba(var(--accent-rgb),.09);border-color:rgba(var(--accent-rgb),.32)}.answer-option .letter{display:grid;place-items:center;width:26px;height:26px;flex:none;background:rgba(255,255,255,.06);border-radius:7px;font-size:11px;font-weight:800;color:var(--muted)}.answer-option.chosen{border-color:var(--accent);background:rgba(var(--accent-rgb),.13)}.answer-option.chosen .letter{color:#0a1120;background:var(--accent)}.answer-option.correct{border-color:rgba(84,222,192,.56);background:rgba(84,222,192,.07)}.answer-option.wrong{border-color:rgba(255,144,140,.46);background:rgba(255,144,140,.07)}.answer-option:disabled{cursor:default;opacity:1}.question-body{font-size:15px;font-weight:700;line-height:1.85;margin:12px 0 16px;white-space:pre-wrap}.explain{margin-top:17px;border:1px solid rgba(84,222,192,.22);background:rgba(84,222,192,.04);border-radius:14px;padding:16px 17px}.explain h4{margin:0 0 8px;font-size:13px;color:var(--success)}.explain p{margin:7px 0;font-size:12px;color:#bbd4d8;line-height:1.9}.explain ol{margin:6px 0;padding-left:21px;font-size:12px;color:#bfd2de;line-height:2}.tag-row{display:flex;flex-wrap:wrap;gap:7px}.tag{font-size:10px;border-radius:7px;background:#1a2a43;border:1px solid var(--line);color:var(--muted);padding:3px 8px}.item-list{display:grid;gap:8px}.item-list button{width:100%;display:flex;justify-content:space-between;gap:10px;align-items:center;padding:12px 14px;background:rgba(5,13,25,.55);border:1px solid var(--line);border-radius:10px;color:var(--text);text-align:left}.item-list button:hover{border-color:rgba(var(--accent-rgb),.45)}.item-list button.active{border-color:var(--accent);background:rgba(var(--accent-rgb),.12)}.course-node{border:1px solid var(--line);border-radius:13px;padding:16px;background:rgba(7,17,32,.52)}.course-node h4{margin:6px 0;font-size:13px}.course-node p{margin:0;font-size:12px;color:var(--muted)}.trackbar{height:9px;background:#23334c;border-radius:10px;overflow:hidden}.trackbar i{display:block;height:100%;border-radius:10px;background:var(--accent);transition:width .3s}.empty{padding:28px 18px;text-align:center;border:1px dashed var(--line2);border-radius:14px;color:var(--muted);font-size:12px}.empty svg{color:var(--accent);width:27px;height:27px;margin-bottom:8px}.table{width:100%;border-collapse:collapse;font-size:12px}.table th,.table td{text-align:left;border-bottom:1px solid var(--line);padding:11px 10px}.table th{color:var(--muted);font-size:11px}.table tr:last-child td{border-bottom:0}.footer{margin-top:42px;padding-top:20px;border-top:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;gap:12px;font-size:11px;color:var(--soft);flex-wrap:wrap}.foot-links{display:flex;gap:18px}.kbd{display:inline-block;padding:0 6px;border:1px solid var(--line2);border-radius:4px;color:var(--muted);font-size:10px;font-family:monospace;line-height:19px}.tooltip{position:absolute;z-index:10;pointer-events:none;background:#1d2b43;border:1px solid var(--line2);color:#ecf3ff;padding:8px 12px;border-radius:10px;font-size:11px;max-width:240px;box-shadow:var(--shadow)}.toast{position:fixed;bottom:24px;right:24px;z-index:90;max-width:360px;padding:13px 18px;border:1px solid rgba(var(--accent-rgb),.4);background:#1b2a42;color:#fff;border-radius:12px;box-shadow:0 15px 50px rgba(0,0,0,.35);font-size:12px;animation:rise .24s ease}@keyframes rise{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}
@media(max-width:1160px){.work-grid{grid-template-columns:minmax(0,1fr) 235px}.hero h1{font-size:33px}.sidebar{width:210px}.app{grid-template-columns:210px minmax(0,1fr)}}
@media(max-width:980px){.app{display:block}.sidebar{position:relative;width:auto;height:auto;padding:13px 18px;gap:8px;border-right:0;border-bottom:1px solid var(--line)}.brand{padding:3px}.sidebar-course,.sidebar-head,.sidebar-foot{display:none}.nav-list{display:flex;overflow-x:auto;gap:5px;padding-bottom:1px}.nav-item{white-space:nowrap;width:auto;padding:9px 12px}.nav-item.is-active:after{display:none}.topbar{min-height:60px;padding:12px 20px}.content{padding:20px 18px 40px}.hero{min-height:250px}.work-grid{grid-template-columns:minmax(0,1fr) 240px}.metric-row{gap:8px}.metric{padding:14px 13px}.metric-value{font-size:21px}}
@media(max-width:690px){.topbar{align-items:flex-start}.breadcrumb{font-size:11px}.top-actions{justify-content:flex-end}.top-actions .btn span:not([data-ico]){display:none}.top-actions .btn{padding:9px}.hero{min-height:310px;background-position:center right;background-image:linear-gradient(90deg,rgba(9,19,35,.96),rgba(9,19,35,.84) 64%,rgba(9,19,35,.34)),url('assets/hero.jpg');padding:25px}.hero h1{font-size:29px}.hero p{font-size:12px}.metric-row{grid-template-columns:repeat(2,minmax(0,1fr))}.work-grid{grid-template-columns:1fr}.insight-column{grid-template-columns:repeat(2,minmax(0,1fr))}.grid3{grid-template-columns:1fr}.grid2{grid-template-columns:1fr}.panel-body{padding:17px}.panel-head{padding:15px 17px}.section-head h2{font-size:20px}.range-wrap{grid-template-columns:90px 1fr 48px}}
@media(max-width:450px){.insight-column{grid-template-columns:1fr}.brand-name{font-size:14px}.hero h1{font-size:26px}.metric-row{grid-template-columns:repeat(2,minmax(0,1fr))}.topbar{flex-wrap:wrap}.breadcrumb{flex:1}.hero-cta{gap:7px}.footer{display:block}}