@import"https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@400;500;700&family=Roboto+Condensed:wght@500;700&display=swap";:root{--ink: #111d4a;--paper: #ffffff;--card: #ffffff;--line: #dfe6ff;--soft-line: #edf2ff;--muted: #5a6386;--accent: #3777ff;--accent2: #dd2280;--accent3: #111d4a;--logo-hi: #ffb5c2;--accent-soft: #ffb5c2;--radius: 0px;--shadow: none;--font-base: "Helvetica Neue",Arial,"Hiragino Kaku Gothic ProN","Hiragino Sans", "BIZ UDPGothic", sans-serif}*,*:before,*:after{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--font-base);font-weight:500;font-size:16px;line-height:1.7}button,input,textarea,select{font:inherit}button{cursor:pointer}:focus-visible{outline:2px solid var(--accent3);outline-offset:3px}.skip-link{position:absolute;top:-100px;left:12px;z-index:1000;background:var(--ink);color:#fff;padding:9px 14px;border-radius:var(--radius)}.skip-link:focus{top:12px}.app-shell{min-height:100vh;display:flex;flex-direction:column}.header{height:64px;padding:0 28px;background:var(--accent);color:#fff;display:flex;align-items:center;justify-content:space-between;gap:20px;position:sticky;top:0;z-index:50;box-shadow:0 8px 24px #111d4a1f}.header-logo{font-family:Roboto Condensed,Noto Sans JP,sans-serif;font-weight:700;font-size:24px}.header-logo span{color:var(--logo-hi)}.header-nav{display:flex;align-items:center;gap:8px;flex-wrap:wrap;justify-content:flex-end}.nav-btn{border:1px solid rgba(255,255,255,.18);background:#ffffff0a;color:#ffffffd6;border-radius:var(--radius);padding:7px 12px;font-size:16px}.nav-btn:hover,.nav-btn.active{background:var(--accent);color:#fff;border-color:#ffffff2e}.nav-btn.subtle{color:#ffffff9e}.main-content{flex:1}.page{width:min(1180px,100%);margin:0 auto;padding:32px}.page-title{margin:0 0 4px;font-family:Roboto Condensed,Noto Sans JP,sans-serif;font-size:32px;line-height:1.25;font-weight:700}.page-sub{margin:0 0 28px;color:var(--muted);font-size:16px}.auth-wrap{min-height:calc(100vh - 64px);display:grid;place-items:center;padding:28px 16px}.auth-card,.panel,.stat-card,.course-card,.lesson-card,.modal,.quiz-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}.auth-card{width:min(460px,100%);padding:34px}.auth-title{margin:0 0 8px;font-family:Roboto Condensed,Noto Sans JP,sans-serif;font-size:28px;font-weight:700}.auth-sub{color:var(--muted);margin:0 0 24px;font-size:16px}.form-group{margin-bottom:16px}.form-label{display:block;font-size:16px;font-weight:700;margin-bottom:6px}.req{color:var(--accent2);margin-left:4px}.form-input{width:100%;border:1px solid var(--line);border-radius:var(--radius);background:#fff;padding:10px 12px}textarea.form-input{min-height:120px;resize:vertical}.form-error{color:var(--accent2);font-size:12px;margin:6px 0 0}.btn-primary,.btn-secondary,.btn-small,.btn-danger{border:0;border-radius:var(--radius);font-weight:700}.btn-primary{width:100%;background:var(--accent);color:#fff;padding:12px 14px}.btn-primary:hover{background:var(--accent3)}.btn-secondary{background:#fff;color:var(--ink);border:1px solid var(--line);padding:10px 14px}.btn-secondary:hover{border-color:var(--ink)}.btn-small{background:var(--accent);color:#fff;padding:8px 12px;font-size:16px}.btn-small:hover{background:var(--accent3)}.btn-small:disabled,.btn-secondary:disabled{opacity:.55;cursor:not-allowed}.btn-small:disabled:hover{background:var(--ink)}.btn-danger{background:#fff0f5;color:var(--accent2);border:1px solid var(--accent-soft);padding:7px 10px;font-size:12px}.auth-link{text-align:center;margin-top:18px;font-size:16px;color:var(--muted)}.link-btn{border:0;background:none;color:var(--accent3);text-decoration:underline;padding:0}.demo-section{margin-top:22px;padding-top:18px;border-top:1px solid var(--soft-line)}.demo-label{font-family:Roboto Condensed,Noto Sans JP,sans-serif;font-size:12px;color:var(--muted);text-transform:uppercase;margin:0 0 10px}.demo-btns{display:grid;grid-template-columns:repeat(auto-fit,minmax(130px,1fr));gap:8px}.demo-btn{text-align:left;border:1px solid var(--line);background:#fff;border-radius:var(--radius);padding:10px}.demo-btn strong,.demo-btn span{display:block}.demo-btn span{color:var(--muted);font-size:11px;margin-top:2px}.alert{padding:11px 14px;border-left:4px solid;border-radius:var(--radius);margin-bottom:16px;font-size:16px;font-weight:700}.alert-error{background:#fff0f5;color:var(--accent2);border-color:var(--accent2)}.alert-success{background:#edf2ff;color:var(--accent3);border-color:var(--accent)}.stats-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:14px;margin-bottom:26px}.stat-card{padding:18px}.stat-card.accent{background:var(--accent3);color:#fff}.stat-num{font-family:Roboto Condensed,Noto Sans JP,sans-serif;font-size:36px;font-weight:700;line-height:1}.stat-label{color:var(--muted);font-size:12px;margin-top:5px}.stat-card.accent .stat-label{color:#ffffffa6}.course-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:16px;list-style:none;margin:0;padding:0}.course-card{overflow:hidden;display:flex;flex-direction:column}.thumbnail-art{position:relative;overflow:hidden;background:#edf2ff;color:#fff;isolation:isolate}.thumbnail-art:before{content:"";position:absolute;inset:0;background:linear-gradient(135deg,#fff3,#fff0 46%),radial-gradient(circle at 78% 22%,rgba(255,255,255,.24),transparent 28%),repeating-linear-gradient(135deg,rgba(255,255,255,.08) 0 2px,transparent 2px 11px);z-index:-1}.thumbnail-art img{width:100%;aspect-ratio:16/9;height:100%;object-fit:cover;display:block}.thumbnail-art.course{aspect-ratio:16/9;display:flex;flex-direction:column;justify-content:flex-end;padding:0}.thumbnail-art.lesson{width:168px;min-height:132px;height:100%;display:flex;flex-direction:column;justify-content:flex-end;padding:14px;justify-self:end}.thumbnail-art.tone-0{background:linear-gradient(135deg,#3777ff,#111d4a)}.thumbnail-art.tone-1{background:linear-gradient(135deg,#dd2280,#111d4a)}.thumbnail-art.tone-2{background:linear-gradient(135deg,#111d4a,#3777ff)}.thumbnail-art.tone-3{background:linear-gradient(135deg,#ffb5c2,#dd2280)}.thumbnail-art.tone-4{background:linear-gradient(135deg,#3777ff,#dd2280)}.thumbnail-art.tone-5{background:linear-gradient(135deg,#111d4a,#ffb5c2)}.thumbnail-kicker{font-family:Roboto Condensed,Noto Sans JP,sans-serif;font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:0;opacity:.78}.thumbnail-title{display:block;font-family:Roboto Condensed,Noto Sans JP,sans-serif;font-size:22px;font-weight:700;line-height:1.2;margin-top:5px;overflow-wrap:anywhere}.course-head{padding:18px 20px 14px;border-bottom:1px solid var(--soft-line)}.course-meta{display:flex;gap:8px;flex-wrap:wrap;align-items:center;margin-bottom:8px}.pill{display:inline-flex;align-items:center;font-size:11px;font-weight:700;color:var(--accent3)}.pill.admin{color:var(--accent2)}.pill.developer{background:#edf2ff;color:var(--accent)}.pill.done{background:#edf2ff;color:var(--accent3)}.pill.progress{background:#fff0f5;color:var(--accent2)}.pill.pending{background:#ffe3eb;color:var(--accent2)}.course-title{font-family:Roboto Condensed,Noto Sans JP,sans-serif;font-size:24px;font-weight:700;margin:0}.course-desc{color:var(--muted);font-size:16px;margin:8px 0 0}.course-body{padding:16px 20px 20px;flex:1;display:flex;flex-direction:column;gap:14px}.progress-wrap{height:8px;background:#edf2ff;border-radius:999px;overflow:hidden}.progress-fill{height:100%;background:var(--accent)}.lesson-list{display:grid;gap:12px}.lesson-card{padding:16px;display:grid;grid-template-columns:minmax(0,1fr) 168px;gap:10px;align-items:stretch}.lesson-content{min-width:0;display:grid;gap:10px;align-content:start}.lesson-card h3{margin:0;font-family:Roboto Condensed,Noto Sans JP,sans-serif;font-size:20px;font-weight:700}.lesson-card p{margin:0;color:var(--muted);font-size:16px}.lesson-actions{display:flex;gap:8px;flex-wrap:wrap;align-items:center}.course-layout{display:grid;grid-template-columns:minmax(0,1fr) 380px;gap:22px;align-items:start}.outline-layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:22px;align-items:start}.sidebar{position:sticky;top:84px;display:grid;gap:16px}.breadcrumb{display:flex;gap:8px;align-items:center;color:var(--muted);font-size:16px;margin-bottom:18px;flex-wrap:wrap}.video-frame{background:var(--accent3);border:1px solid var(--line);border-radius:var(--radius);aspect-ratio:16/9;overflow:hidden;margin-bottom:12px;box-shadow:var(--shadow)}.video-frame iframe{width:100%;height:100%;border:0;display:block}.video-frame video{width:100%;height:100%;display:block;background:var(--accent3)}.video-empty{height:100%;display:grid;place-items:center;color:#ffffff9e;text-align:center;padding:18px}.panel{padding:20px}.panel h2,.quiz-card h2{font-family:Roboto Condensed,Noto Sans JP,sans-serif;font-size:20px;margin:0 0 14px;padding-bottom:9px;border-bottom:1px solid var(--soft-line)}.rich-text p{margin:0 0 12px}.rich-text ul{margin:8px 0 0 20px;padding:0}.rich-text strong{color:var(--accent)}.quiz-card{padding:20px}.quiz-options{display:grid;gap:8px;margin-top:12px}.quiz-option{border:1px solid var(--line);background:#fff;border-radius:var(--radius);padding:10px 12px;text-align:left}.quiz-option.selected{border-color:var(--accent3);background:#edf2ff}.quiz-option.correct{background:#edf2ff;border-color:var(--accent)}.quiz-option.wrong{background:#fff0f5;border-color:var(--accent-soft)}.feedback{margin-top:12px;border:1px solid var(--line);border-radius:var(--radius);padding:12px;font-size:16px;background:#fff}.work-status{font-size:16px;color:var(--muted);margin:0 0 10px}.tabs{display:flex;gap:6px;flex-wrap:wrap;border-bottom:1px solid var(--line);margin-bottom:20px}.tab-btn{border:0;border-bottom:3px solid transparent;background:transparent;padding:10px 14px;font-weight:700;color:var(--muted);margin-bottom:-2px}.tab-btn.active{color:var(--ink);border-bottom-color:var(--accent)}.table-wrap{overflow:auto;background:#fff;border:1px solid var(--line);border-radius:var(--radius)}.progress-sequence{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:8px;min-width:360px}.lesson-progress-cell{border:1px solid var(--line);background:#fff;padding:10px;display:grid;gap:5px;align-content:start}.lesson-progress-cell strong{font-size:13px;line-height:1.35}table{border-collapse:collapse;width:100%;font-size:16px}th{background:#edf2ff;color:var(--ink);text-align:left;padding:10px 12px;white-space:nowrap;border-bottom:1px solid var(--line)}td{border-bottom:1px solid var(--line);padding:10px 12px;vertical-align:top}tr:last-child td{border-bottom:0}.section-heading{font-family:Roboto Condensed,Noto Sans JP,sans-serif;font-size:24px;margin:0 0 10px}.toolbar{display:flex;justify-content:space-between;gap:12px;align-items:center;margin-bottom:14px;flex-wrap:wrap}.modal-overlay{position:fixed;inset:0;background:#0000008c;z-index:100;display:grid;place-items:center;padding:18px}.modal{width:min(620px,100%);max-height:90vh;overflow:auto;padding:24px}.modal h2{margin:0 0 18px;font-size:20px}.modal-actions{display:flex;gap:8px;justify-content:flex-end;margin-top:18px;flex-wrap:wrap}.two-col{display:grid;grid-template-columns:1fr 1fr;gap:14px}.material-layout{display:grid;grid-template-columns:minmax(220px,320px) minmax(0,1fr);gap:14px;align-items:start}.access-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:8px}.access-grid.compact{grid-template-columns:repeat(auto-fit,minmax(160px,1fr))}.check-row{display:grid;grid-template-columns:auto minmax(0,1fr);gap:8px;align-items:center;border:1px solid var(--line);background:#fff;padding:9px 10px}.check-row .work-status{grid-column:2;margin:-4px 0 0}.inline-actions{display:flex;gap:8px;align-items:center;flex-wrap:wrap}.question-editor{border:1px solid var(--line);border-radius:var(--radius);padding:16px;background:#fff}.mentor-card{position:sticky;top:84px;display:grid;gap:14px}.mentor-profile{display:flex;gap:12px;align-items:flex-start}.mentor-avatar{width:54px;height:54px;border-radius:50%;background:var(--accent3);color:#fff;display:grid;place-items:center;flex:0 0 auto;overflow:hidden;font-family:Roboto Condensed,Noto Sans JP,sans-serif;font-size:20px;font-weight:700}.mentor-avatar img{width:100%;height:100%;object-fit:cover;display:block}.mentor-name{margin:0;font-family:Roboto Condensed,Noto Sans JP,sans-serif;font-size:24px;line-height:1.15}.mentor-intro{margin:4px 0 0;color:var(--muted);font-size:16px}.mentor-message{min-height:96px}.empty{color:var(--muted);text-align:center;padding:34px 16px}.stack{display:grid;gap:14px}.attachment-box{margin:10px 0;padding:10px 12px;background:#edf2ff;border:1px solid var(--line);border-radius:var(--radius);display:grid;gap:8px}.attachment-link{color:var(--accent3);word-break:break-all;font-size:16px}.thumbnail-preview{width:100%;max-height:180px;object-fit:cover;border-radius:var(--radius);display:block;margin-top:8px}@media(max-width:900px){.header{height:auto;padding:14px 16px;align-items:flex-start;flex-direction:column}.page{padding:24px 16px}.course-layout,.outline-layout,.two-col,.material-layout,.lesson-card{grid-template-columns:1fr}.thumbnail-art.lesson{width:100%;min-height:0;aspect-ratio:16/9;grid-row:1}.sidebar,.mentor-card{position:static}}