:root{color-scheme:light;--bg:#f7f8fa;--surface:#ffffff;--surface-strong:#ffffff;--surface-soft:#f8fafc;--border:#e1e5ec;--border-strong:#cfd6e1;--text:#111827;--muted:#5f6b7a;--accent:#0f766e;--accent-strong:#115e59;--accent-soft:#e6f4f1;--ink-soft:#eef1f5;--danger:#b42318;--success:#027a48;--warning:#b54708;--shadow-lg:none;--shadow-md:none;--radius-sm:6px;--radius-md:8px;--radius-lg:10px}*{box-sizing:border-box}body,html{margin:0;padding:0;background:var(--bg);color:var(--text);font-family:var(--default-font-family),"Hiragino Sans","Yu Gothic","Noto Sans JP",system-ui,sans-serif}a{color:inherit;text-decoration:none}main{min-height:100vh}.page-shell{max-width:1120px;margin:0 auto;padding:48px 24px 88px}.hero{position:relative;overflow:hidden;display:grid;grid-gap:24px;gap:24px;grid-template-columns:minmax(0,1.5fr) minmax(280px,.9fr);background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:36px;box-shadow:var(--shadow-lg)}.hero-aside,.hero-content{position:relative;z-index:1}.hero-aside{display:grid;grid-gap:12px;gap:12px;align-content:flex-start}.hero-title{margin:10px 0 12px;font-size:clamp(2rem,4vw,3.3rem);line-height:1.05;letter-spacing:-.04em}.hero-summary{max-width:680px;font-size:1rem;line-height:1.7}.hero-meta{display:grid;grid-gap:12px;gap:12px}.hero-meta-card{border:1px solid var(--border);background:var(--surface-soft);border-radius:var(--radius-md);padding:18px 18px 16px;box-shadow:var(--shadow-md)}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));grid-gap:16px;gap:16px;margin-top:24px}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-md);padding:22px;box-shadow:var(--shadow-md)}.card h2,.card h3,.card p{margin-top:0}.eyebrow{display:none}.muted,.subtle{color:var(--muted)}.subtle{font-size:.92rem;line-height:1.6}.button-row{display:flex;gap:12px;flex-wrap:wrap;margin-top:20px}.button{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:var(--radius-sm);min-height:38px;padding:9px 14px;border:1px solid var(--border-strong);background:var(--surface);font-weight:700;cursor:pointer;transition:background .12s ease,border-color .12s ease}.button:hover{background:var(--surface-soft)}.button.primary{background:var(--accent);color:white;border-color:var(--accent)}.button.secondary{background:var(--surface-soft)}.button:disabled{opacity:.64;cursor:progress}.surface-grid{display:grid;grid-gap:24px;gap:24px;margin-top:28px;min-width:0}.surface-grid.two-column{grid-template-columns:minmax(0,1.15fr) minmax(300px,.85fr)}.card-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));grid-gap:16px;gap:16px}.stat-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-md);padding:18px;min-height:124px;min-width:0}.stat-label{font-size:.82rem;letter-spacing:0;text-transform:none;color:var(--muted)}.stat-value{margin-top:14px;font-size:clamp(1.7rem,2.6vw,2.3rem);line-height:1;letter-spacing:-.05em}.stat-caption{margin-top:10px;font-size:.95rem;color:var(--muted);line-height:1.5}.section-heading{display:flex;align-items:baseline;justify-content:space-between;gap:12px;margin-bottom:16px}.section-heading h2,.section-heading h3{margin:0}.action-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));grid-gap:16px;gap:16px}.action-card{display:grid;grid-gap:14px;gap:14px;padding:22px;border-radius:var(--radius-md);border:1px solid var(--border);background:var(--surface);box-shadow:var(--shadow-md)}.action-card h3{margin:0}.action-card p{margin:0;color:var(--muted);line-height:1.65}.stack-list{display:grid;grid-gap:12px;gap:12px}.list-row{display:grid;grid-gap:4px;gap:4px;padding-top:12px;border-top:1px solid var(--border)}.list-row:first-child{padding-top:0;border-top:none}.list-title{font-weight:700}.pill-row{display:flex;flex-wrap:wrap;gap:10px}.pill{display:inline-flex;align-items:center;gap:8px;border-radius:var(--radius-sm);padding:8px 12px;border:1px solid var(--border);background:var(--surface);color:var(--muted);font-size:.92rem}.pill strong{color:var(--text)}.auth-panel{display:grid;grid-gap:18px;gap:18px}.auth-block{display:grid;grid-gap:12px;gap:12px;border:1px solid var(--border);border-radius:var(--radius-md);background:var(--surface);padding:18px}.auth-block-title{display:flex;align-items:center;gap:10px}.auth-block-title h3{margin:0}.form-stack{display:grid;grid-gap:12px;gap:12px}.field{display:grid;grid-gap:6px;gap:6px}.field-label{color:var(--muted);font-size:.92rem}.select-input,.text-input{width:100%;padding:13px 14px;border-radius:var(--radius-sm);border:1px solid var(--border);background:var(--surface);color:var(--text);font:inherit}.select-input:focus,.text-input:focus{outline:2px solid rgba(13,124,114,.16);border-color:rgba(13,124,114,.4)}.notice{border-radius:var(--radius-sm);padding:14px 16px;font-size:.95rem;line-height:1.55}.notice.success{background:rgba(2,122,72,.1);border:1px solid rgba(2,122,72,.16);color:var(--success)}.notice.error{background:rgba(180,35,24,.09);border:1px solid rgba(180,35,24,.16);color:var(--danger)}.shell-panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-md);padding:24px;box-shadow:var(--shadow-lg);min-width:0}.shell-header{display:flex;justify-content:space-between;gap:16px;align-items:flex-start;margin-bottom:20px}.shell-header h2{margin:0}.compact-grid{display:grid;grid-gap:12px;gap:12px}.table-shell{overflow-x:auto;margin-top:12px;min-width:0}.data-table{width:100%;border-collapse:collapse;min-width:820px}.data-table td,.data-table th{text-align:left;padding:12px 14px;border-bottom:1px solid var(--border)}.data-table th{background:var(--surface-soft);color:var(--muted);font-size:.82rem;font-weight:700;letter-spacing:0;text-transform:none}.data-table tbody tr:hover{background:#fbfcfe}.link-strong{display:inline-flex;align-items:center;gap:6px;color:var(--accent-strong);font-weight:700}.relation-link{color:#1f4f7a;font-weight:650;text-decoration:underline;text-underline-offset:3px;-webkit-text-decoration-color:#c9d7e4;text-decoration-color:#c9d7e4}.text-action{color:var(--accent-strong);font-weight:750;white-space:nowrap}.list-meta{margin-top:4px;color:var(--muted);font-size:.84rem;line-height:1.45}.resource-toolbar{display:flex;justify-content:space-between;align-items:flex-start;gap:16px;padding:16px;border:1px solid var(--border);border-radius:var(--radius-md);background:var(--surface);min-width:0}.resource-toolbar>div:first-child{min-width:0}.resource-toolbar h2,.resource-toolbar p{margin:0}.resource-actions{display:flex;flex-wrap:wrap;gap:10px;justify-content:flex-end}.resource-actions .button{white-space:nowrap}.workflow-strip{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));border:1px solid var(--border);border-radius:var(--radius-md);background:var(--surface);min-width:0}.workflow-step{padding:16px;border-left:1px solid var(--border)}.workflow-step:first-child{border-left:none}.workflow-step-number{display:inline-flex;align-items:center;justify-content:center;width:24px;height:24px;margin-bottom:10px;border-radius:var(--radius-sm);background:var(--accent-soft);color:var(--accent-strong);font-size:.82rem;font-weight:800}.summary-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));grid-gap:12px;gap:12px}.summary-item{padding:14px;border:1px solid var(--border);border-radius:var(--radius-md);background:var(--surface-soft)}.summary-item strong{display:block;margin-top:6px;font-size:1.15rem}.detail-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));grid-gap:12px 20px;gap:12px 20px}.detail-list div{padding-bottom:12px;border-bottom:1px solid var(--ink-soft)}.detail-list dd{margin:4px 0 0;font-weight:700}.form-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;grid-gap:20px;gap:20px;align-items:start}.form-main{display:grid;grid-gap:18px;gap:18px}.form-side{position:-webkit-sticky;position:sticky;top:24px;display:grid;grid-gap:14px;gap:14px;padding:16px;border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--surface)}.form-side h3,.form-side p{margin:0}.form-card{display:grid;grid-gap:14px;gap:14px;padding:16px;border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--surface)}.form-card h3,.form-card p{margin:0}.field-help{margin-top:5px;color:var(--muted);font-size:.84rem;line-height:1.5}.form-actions{display:flex;justify-content:flex-end;gap:10px;padding-top:4px}.plan-wizard{display:grid;grid-gap:18px;gap:18px}.plan-template-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));grid-gap:10px;gap:10px}.plan-template-option{display:grid;grid-template-columns:24px minmax(0,1fr);grid-gap:10px;gap:10px;align-items:start;min-height:76px;padding:13px;border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--surface);color:var(--ink);text-align:left;cursor:pointer}.plan-template-option svg{margin-top:2px;color:var(--muted)}.plan-template-option span{display:grid;grid-gap:3px;gap:3px;min-width:0}.plan-template-option strong{font-size:.92rem;line-height:1.35}.plan-template-option small{color:var(--muted);font-size:.78rem;line-height:1.35}.plan-template-option.selected,.plan-template-option:hover{border-color:var(--ink);background:var(--surface-soft)}.plan-template-option.selected strong,.plan-template-option.selected svg{color:var(--ink)}.optional-fee-grid{display:grid;grid-template-columns:minmax(0,1fr) 180px;grid-gap:10px;gap:10px;align-items:end}.plan-preview-list{display:grid;grid-gap:8px;gap:8px}.plan-preview-row{display:grid;grid-template-columns:minmax(0,1fr) auto;grid-gap:4px 12px;gap:4px 12px;padding:10px 0;border-bottom:1px solid var(--border)}.plan-preview-row span,.plan-preview-row strong{min-width:0}.plan-preview-row small{grid-column:1/-1;color:var(--muted);font-size:.78rem}.metadata-editor{display:grid;grid-gap:10px;gap:10px;padding:12px;border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--surface-soft)}.metadata-textarea{min-height:300px;font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,Liberation Mono,monospace;font-size:.84rem;line-height:1.55;resize:vertical}.section-title-row{display:flex;gap:16px;align-items:flex-start;justify-content:space-between}.charge-item-list{display:grid;grid-gap:10px;gap:10px}.charge-item-row{display:grid;grid-template-columns:minmax(140px,.9fr) minmax(160px,1fr) minmax(120px,.8fr) minmax(110px,.7fr);grid-gap:10px;align-items:end;padding:12px}.charge-item-row,.summary-line{gap:10px;border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--surface-soft)}.summary-line{display:flex;flex-wrap:wrap;align-items:center;padding:12px 14px}.summary-line strong{color:var(--ink)}.align-start{justify-self:start}.switch-row{display:flex;gap:10px;align-items:center;padding:12px 14px;border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--surface-soft);font-weight:700}.login-shell{min-height:100vh;display:grid;grid-template-columns:minmax(360px,.62fr) minmax(0,1fr);background:var(--bg)}.login-panel,.login-support{min-width:0;padding:40px}.login-panel{grid-gap:26px;gap:26px;border-right:1px solid var(--border);background:var(--surface)}.login-panel,.login-support{display:grid;align-content:start}.login-support{grid-gap:20px;gap:20px;max-width:780px}.login-brand{display:flex;align-items:center;gap:12px}.login-mark{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;border-radius:var(--radius-md);background:var(--accent-soft);color:var(--accent-strong)}.login-product{color:var(--text);font-size:1.35rem;font-weight:800;line-height:1}.login-copy{display:grid;grid-gap:10px;gap:10px;max-width:560px}.login-copy h1{margin:0;color:var(--text);font-size:clamp(1.9rem,3vw,2.6rem);line-height:1.16;letter-spacing:0}.login-copy p{margin:0;color:var(--muted);line-height:1.8}.login-card{min-width:0;display:grid;grid-gap:18px;gap:18px;padding:22px;border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--surface)}.login-card h2{margin:6px 0 0}.login-security-list{display:grid;grid-gap:12px;gap:12px}.login-security-list>div{display:grid;grid-template-columns:24px minmax(0,1fr);grid-gap:10px;gap:10px;align-items:start;padding:14px;border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--surface)}.login-security-list span,.login-security-list strong{display:block}.login-security-list span{margin-top:4px;color:var(--muted);font-size:.92rem;line-height:1.6}.app-shell{min-height:100vh;display:grid;grid-template-columns:248px minmax(0,1fr);background:var(--bg)}.app-sidebar{display:grid;grid-template-rows:auto 1fr auto;grid-gap:18px;gap:18px;padding:22px 14px;border-right:1px solid var(--border);background:var(--surface);max-height:100vh;position:-webkit-sticky;position:sticky;top:0}.app-brand{padding:8px 10px 0}.app-brand-title{font-size:1.32rem;line-height:1;letter-spacing:0;font-weight:800;color:var(--text)}.app-brand-subtitle{margin-top:8px;color:var(--muted);line-height:1.55}.app-nav{display:grid;grid-gap:4px;gap:4px;align-content:flex-start;overflow-y:auto;padding-right:4px}.app-nav-link{display:grid;grid-template-columns:34px minmax(0,1fr);grid-gap:10px;gap:10px;align-items:center;padding:11px 12px;border-radius:var(--radius-sm);border:1px solid transparent;color:#334155;transition:background .12s ease,border-color .12s ease}.app-nav-link:hover{background:var(--surface-soft)}.app-nav-link.active{background:var(--accent-soft);border-color:#b8d8cf;color:var(--accent-strong);box-shadow:none}.app-nav-icon{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:var(--radius-sm)}.app-nav-icon,.app-nav-link.active .app-nav-icon{background:transparent}.app-nav-copy{min-width:0}.app-nav-title{font-weight:700;font-size:.94rem}.app-nav-description,.app-sidebar-footer{display:none}.app-main{min-width:0;display:grid;grid-template-rows:auto 1fr}.app-topbar{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:16px 28px;border-bottom:1px solid var(--border);background:var(--surface)}.app-topbar-title h1{margin:0;font-size:clamp(1.5rem,1.8vw,2rem);letter-spacing:0;color:var(--text)}.app-topbar-title p{display:none}.app-toolbar{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.toolbar-chip{gap:8px;min-height:40px;padding:0 18px;font-weight:700}.toolbar-chip,.toolbar-icon-chip{display:inline-flex;align-items:center;justify-content:center;border-radius:var(--radius-sm);border:1px solid var(--border);background:var(--surface);color:#334155}.toolbar-icon-chip{position:relative;width:46px;height:46px}.toolbar-alert-badge{position:absolute;right:-3px;top:-3px;display:inline-flex;align-items:center;justify-content:center;min-width:22px;height:22px;padding:0 6px;border-radius:999px;background:#f25656;color:#fff;font-size:.76rem;font-weight:800}.user-chip{display:flex;align-items:center;gap:12px;min-width:150px;padding:8px 12px;border-radius:var(--radius-sm);border:1px solid var(--border);background:var(--surface)}.user-chip strong{font-size:.98rem;display:block}.user-chip span{color:var(--muted);font-size:.88rem}.app-content{padding:24px 28px 40px;min-width:0}.dashboard-grid{display:grid;grid-gap:16px;gap:16px;min-width:0}.dashboard-stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));grid-gap:12px;gap:12px}.metric-card{display:grid;grid-gap:10px;gap:10px;padding:18px;border-radius:var(--radius-sm);border:1px solid var(--border);background:var(--surface);box-shadow:none;min-width:0}.metric-value{font-size:clamp(1.5rem,2vw,2.1rem);line-height:1;letter-spacing:-.05em}.dashboard-columns{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(340px,.8fr);grid-gap:16px;gap:16px}.dashboard-card{padding:16px;border-radius:var(--radius-sm);border:1px solid var(--border);background:var(--surface);box-shadow:none;min-width:0}.dashboard-card-header{display:flex;justify-content:space-between;align-items:baseline;gap:12px;margin-bottom:14px}.dashboard-card-header h2,.dashboard-card-header h3{margin:0}.notice-list,.schedule-list,.task-list{display:grid;grid-gap:0;gap:0}.notice-row,.schedule-row,.task-row{display:grid;grid-gap:8px;gap:8px;align-items:center;padding:14px 0;border-top:1px solid var(--ink-soft)}.notice-row:first-child,.schedule-row:first-child,.task-row:first-child{border-top:none;padding-top:0}.schedule-row{grid-template-columns:110px minmax(0,1fr) 140px 84px}.notice-row{grid-template-columns:92px minmax(0,1fr) 96px}.task-row{grid-template-columns:minmax(0,1fr) 72px}.tag{display:inline-flex;align-items:center;justify-content:center;width:-moz-fit-content;width:fit-content;padding:6px 12px;border-radius:var(--radius-sm);background:#edf2f7;color:#335174;font-size:.88rem;font-weight:700}.tag.success{background:#e6f4ea;color:var(--success)}.tag.warning{background:#fff1df;color:var(--warning)}.tag.subtle{background:#f1f5f9;color:var(--muted)}.progress-bar{overflow:hidden;display:flex;height:14px;border-radius:999px;background:var(--ink-soft)}.progress-segment{height:100%}.progress-segment.success{background:#4dbd74}.progress-segment.warning{background:#ffb22c}.progress-segment.danger{background:#f46262}.calendar-layout{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(300px,.65fr);grid-gap:20px;gap:20px}.calendar-toolbar{display:flex;align-items:center;justify-content:space-between;gap:18px;margin-bottom:18px}.calendar-title{margin:6px 0 0;color:#273250}.calendar-grid-shell{overflow-x:auto;border:1px solid var(--ink-soft);border-radius:var(--radius-md)}.calendar-grid{display:grid;min-width:840px;grid-template-columns:78px repeat(7,minmax(120px,1fr))}.calendar-cell,.calendar-corner,.calendar-day-header,.calendar-time-label{border-right:1px solid #edf0f5;border-bottom:1px solid #edf0f5}.calendar-day-header{display:grid;grid-gap:4px;gap:4px;padding:14px 10px;text-align:center;background:#fbfcff;color:#334155}.calendar-day-header span{font-size:.84rem;color:var(--muted)}.calendar-row{display:contents}.calendar-time-label{padding:14px 10px;text-align:right;font-size:.84rem;color:var(--muted);background:#fbfcff}.calendar-cell{min-height:82px;padding:8px;background:#ffffff}.lesson-block{width:100%;display:grid;grid-gap:5px;gap:5px;padding:10px 12px;border:1px solid #d7e3ff;border-radius:var(--radius-md);background:#edf2f7;text-align:left;color:#2f477a;cursor:pointer}.lesson-block.active{border-color:#8eb0ff;background:#dfeaff}.lesson-block-time{font-size:.78rem;font-weight:700}.lesson-block-title{font-weight:700}.lesson-block-meta{font-size:.8rem;color:#66728d}.lesson-detail-card{align-self:start}.detail-kv{display:grid;grid-gap:6px;gap:6px;padding-top:12px;border-top:1px solid #edf0f5}.detail-kv:first-child{padding-top:0;border-top:none}.detail-kv span{font-size:.82rem;color:#7a869f}.calendar-empty{padding:28px;border-radius:18px;background:#f8f9fc;color:#74809a}.chat-shell{display:grid;grid-template-columns:320px minmax(0,1fr);min-height:680px;border:1px solid var(--ink-soft);border-radius:var(--radius-md);overflow:hidden}.chat-sidebar{border-right:1px solid #edf0f5;background:#fbfcff}.chat-sidebar-header,.chat-window-header{padding:20px 22px;border-bottom:1px solid #edf0f5}.chat-sidebar-header h2,.chat-window-header h2{margin:6px 0 0}.chat-window-header p{margin:8px 0 0;color:#74809a}.chat-thread-list{display:grid}.chat-thread-item{display:grid;grid-gap:8px;gap:8px;width:100%;padding:18px 20px;border:none;border-bottom:1px solid #edf0f5;background:transparent;text-align:left;cursor:pointer}.chat-thread-item.active{background:#edf3ff}.chat-thread-line{display:flex;justify-content:space-between;gap:12px}.chat-thread-line span,.chat-thread-meta span,.chat-thread-preview,.chat-thread-student{color:#74809a}.chat-thread-preview,.chat-thread-student{font-size:.88rem;line-height:1.5}.chat-window{display:grid;grid-template-rows:auto 1fr auto;background:#ffffff}.chat-thread-meta{display:grid;grid-gap:4px;gap:4px;justify-items:end}.message-stack{display:grid;grid-gap:12px;gap:12px;padding:20px 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