.school-skin{--sch-bg:#0a0a0a;--sch-surface:#141414;--sch-text:#f5f5f5;--sch-muted:#878787;--sch-stroke:#1f1f1f;--sch-display:var(--font-instrument), Georgia, serif;--sch-sans:var(--font-inter), var(--font-noto), ui-sans-serif, system-ui, sans-serif;--sch-mono:ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;--bg:var(--sch-bg);--fg:var(--sch-text);--muted:var(--sch-muted);--line:var(--sch-stroke);--fill:var(--sch-text);--on-fill:var(--sch-bg);--wash:#ffffff0f;--danger:#f87171;--font:var(--sch-sans);--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;min-height:100vh;font-size:16px;line-height:1.6;font-family:var(--sch-sans);isolation:isolate;color:var(--sch-text);background:var(--sch-bg);-webkit-font-smoothing:antialiased}.school-skin--atmosphere{background:0 0}.school-atmosphere{z-index:0;pointer-events:none;background:var(--sch-bg);position:fixed;inset:0;overflow:hidden}.school-atmosphere video{object-fit:cover;width:auto;min-width:100%;height:auto;min-height:100%;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}.school-atmosphere__video--pending{opacity:0}.school-atmosphere__dim{background:#00000094;position:absolute;inset:0}.school-skin__content{z-index:1;position:relative}.school-skin :focus-visible{outline-offset:3px;outline:2px solid #4e85bf}.school-skin ::selection{color:var(--sch-text);background:#4e85bf}.school-skin .school-header{z-index:20;-webkit-backdrop-filter:blur(16px);background:#0000006b;border-bottom:1px solid #ffffff14;position:sticky;top:0;overflow:visible}.school-skin .school-header-inner,.school-skin .school-body{width:min(768px,100% - 32px)}:is(.school-skin.school-shell:has(.school-main-wide) .school-header-inner,.school-skin.school-shell:has(.school-main-wide) .school-body){width:min(1152px,100% - 32px)}.school-skin .school-header-inner{flex-wrap:nowrap;align-items:center;gap:8px;padding:8px 0;display:flex;overflow:visible}.school-skin .school-brand-row{flex-wrap:nowrap;flex:1;align-items:center;gap:4px;min-width:0;overflow:visible}.school-skin .school-brand-row:not(:has(details[open])){overflow-x:hidden}.school-skin .school-brand{z-index:3;color:var(--sch-text);cursor:pointer;flex-shrink:0;align-items:center;gap:10px;margin-right:4px;text-decoration:none;display:inline-flex;position:relative}.school-skin .school-brand__name{font-family:var(--sch-display);font-size:20px;font-style:italic;font-weight:400}.school-skin .school-mark{flex-shrink:0;justify-content:center;align-items:center;width:36px;height:36px;text-decoration:none;display:flex;position:relative}.school-skin .school-mark .brand-mark{width:36px;height:36px}.school-skin .school-nav-link{color:var(--sch-muted);white-space:nowrap;border-radius:9999px;flex-shrink:0;align-items:center;padding:6px 10px;font-size:14px;font-weight:500;text-decoration:none;display:inline-flex}.school-skin .school-nav-link:hover,.school-skin .school-menu>summary:hover{color:var(--sch-text);background:#1f1f1f80}.school-skin .school-menu{position:relative}.school-skin .school-menu>summary{min-height:44px;color:var(--sch-muted);cursor:pointer;touch-action:manipulation;-webkit-user-select:none;user-select:none;white-space:nowrap;border-radius:9999px;flex-shrink:0;align-items:center;padding:6px 10px;font-size:14px;font-weight:500;list-style:none;display:inline-flex}.school-skin .school-menu>summary::-webkit-details-marker{display:none}.school-skin .school-menu__panel{z-index:30;border:1px solid var(--sch-stroke);background:var(--sch-surface);white-space:normal;overflow-wrap:anywhere;border-radius:20px;width:min(260px,100vw - 24px);min-width:12rem;max-width:min(260px,100vw - 24px);padding:8px;display:grid;position:absolute;top:calc(100% + 8px);left:0;box-shadow:0 12px 32px #00000059}.school-skin .school-menu--account .school-menu__panel,.school-skin .school-menu-portal--account .school-menu__panel{z-index:30;border:1px solid var(--sch-stroke);background:var(--sch-surface);white-space:normal;overflow-wrap:anywhere;border-radius:20px;gap:10px;width:min(280px,100vw - 24px);min-width:12rem;max-width:min(280px,100vw - 24px);padding:12px 14px;display:grid;position:absolute;top:calc(100% + 8px);left:auto;right:0;box-shadow:0 12px 32px #00000059}.school-skin .school-header .school-user .school-menu--account .school-account-btn,.school-skin .school-menu-portal--account .school-account-btn{box-sizing:border-box;width:100%;min-width:0;max-width:none;min-height:44px;color:var(--sch-text);text-align:center;white-space:nowrap;background:0 0;border:1px solid #ffffff29;border-radius:9999px;justify-content:center;align-items:center;margin:0;padding:10px 12px;font-size:14px;font-weight:500;text-decoration:none;display:flex}.school-skin .school-header .school-user .school-menu--account .school-account-btn:hover,.school-skin .school-menu-portal--account .school-account-btn:hover{background:#1f1f1f80}.school-skin .school-menu__panel a{color:var(--sch-text);border-radius:12px;padding:10px 12px;font-size:14px;text-decoration:none}.school-skin .school-menu__panel a:hover{background:var(--wash)}.school-skin .school-menu-portal,.school-skin .lab-more-portal{z-index:80;position:fixed}.school-skin .school-menu-portal .school-menu__panel,.school-skin .school-menu-portal--account .school-menu__panel,.school-skin .lab-more-portal .lab-more__panel{position:static;top:auto;left:auto;right:auto}.school-skin .school-user{flex-wrap:nowrap;flex-shrink:0;gap:6px;overflow:visible}.school-skin .school-header .button,.school-skin .school-header .school-user .button{width:auto;min-width:0;max-width:none;min-height:32px;color:var(--sch-text);white-space:nowrap;background:0 0;border:1px solid #ffffff29;padding:4px 12px;font-size:12px;font-weight:500}.school-skin .school-user .button,.school-skin .button-inline,.school-skin .invite-actions .button,.school-skin .lab-dialog-actions .button,.school-skin .staff-table .button,.school-skin .lab-c4-actions .button{width:auto;min-width:0}.school-skin .school-main{padding:32px 0 80px}:is(.school-skin .school-main:has(.legal-dl),.school-skin .school-main:has(.legal-section)){padding-bottom:32px}.school-skin .legal-dl{gap:20px;margin:20px 0 0;display:grid}.school-skin .legal-dl div{border:1px solid var(--sch-stroke);background:var(--sch-surface);border-radius:16px;padding:18px 20px}.school-skin .legal-dl dt{font-family:var(--sch-display);color:var(--sch-text);margin:0 0 8px;font-size:22px;font-style:italic;font-weight:400}.school-skin .legal-dl dd{color:var(--sch-muted);margin:0;font-size:15px;font-style:normal;line-height:1.7}.school-skin .legal-section{border:1px solid var(--sch-stroke);background:var(--sch-surface);border-radius:16px;margin:20px 0 0;padding:18px 20px}.school-skin .legal-section h2{font-family:var(--sch-display);color:var(--sch-text);margin:0 0 8px;font-size:22px;font-style:italic;font-weight:400}.school-skin .legal-section p{color:var(--sch-muted);margin:0;font-size:15px;line-height:1.7}.school-skin .site-legal-footer{border-top:1px solid var(--sch-stroke);color:var(--sch-muted);margin-top:8px;padding:20px 0 48px;font-size:13px}.school-skin .site-legal-footer nav{flex-wrap:wrap;gap:8px 16px;margin-bottom:12px;display:flex}.school-skin .site-legal-footer a{color:var(--sch-muted);text-underline-offset:.18em;text-decoration:underline}.school-skin .site-legal-footer a:hover{color:var(--sch-text)}.school-skin .site-legal-footer p{margin:0 0 6px}.school-skin .billing-legal{text-align:center;justify-items:center;gap:10px;margin-top:32px;padding:0 8px 24px;display:grid}.school-skin .billing-legal__note{max-width:22rem;color:var(--sch-muted);margin:0;font-size:13px;line-height:1.6}.school-skin .billing-legal__links{flex-wrap:wrap;justify-content:center;gap:8px 16px;display:flex}.school-skin .billing-legal__links a{color:var(--sch-muted);text-underline-offset:.18em;font-size:13px;text-decoration:underline}.school-skin .billing-legal__links a:hover{color:var(--sch-text)}.school-skin .school-main>h1,.school-skin .login-card>h1,.school-skin .school-block--about h1{font-family:var(--sch-display);letter-spacing:-.025em;color:var(--sch-text);margin:0 0 16px;font-size:36px;font-style:italic;font-weight:400;line-height:1.1}.school-skin .lead{color:var(--sch-muted);margin:0 0 24px;font-size:15px}.school-skin .lesson-body{gap:12px;margin:24px 0 0;display:grid}.school-skin .lesson-body p{color:var(--sch-muted);margin:0;font-size:15px;line-height:1.7}.school-skin .lesson-nav{margin-top:28px}.school-skin .lesson-nav .button{width:auto;min-width:8rem;text-decoration:none}.school-skin .course-memo-actions{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;display:flex}.school-skin .course-memo-actions .button,.school-skin .course-memo-actions .lesson-nav .button{width:auto;min-width:8rem}.school-skin .course-memo-actions .lesson-nav{flex:auto;justify-content:flex-end;margin:0}.school-skin .course-memo,.school-skin .c1-examples,.school-skin .c1-constraints,.school-skin .c1-weblab{border-top:1px solid var(--sch-stroke);margin-top:28px;padding-top:24px}.school-skin .course-memo h2,.school-skin .c1-examples h2,.school-skin .c1-constraints h2,.school-skin .c1-weblab h2,.school-skin .c1-examples h3{letter-spacing:.08em;color:var(--sch-muted);font-size:13px;font-weight:500}.school-skin .c1-examples h3{letter-spacing:0;color:var(--sch-text);font-size:15px}.school-skin .course-memo-form .button{width:auto;min-width:8rem}.school-skin .course-memo-form textarea{resize:vertical;min-height:10rem;padding:12px 16px}.school-skin .c1-example{border:1px solid var(--sch-stroke);background:var(--sch-surface);border-radius:16px}.school-skin .c1-example-prompt{background:#ffffff0a;border-radius:12px}.school-skin .c1-shot,.school-skin .c1-mock{border:1px solid var(--sch-stroke);border-radius:12px}.school-skin .c1-mock-bad{color:#f3d2b8;background:#3a2418}.school-skin .c1-mock-good{color:#d5e6ef;background:#1a2a32}.school-skin .c1-mock-btn{color:#f3d2b8;border-color:#f3d2b8}.school-skin .c1-lab{border:1px solid var(--sch-stroke);background:var(--sch-surface);border-radius:16px;overflow:hidden}.school-skin .c1-lab-bar{border-bottom:1px solid var(--sch-stroke)}.school-skin .c1-lab-pub,.school-skin .c1-lab-run{border:1px solid var(--sch-stroke);border-radius:9999px}.school-skin .c1-lab-ask{border-right:1px solid var(--sch-stroke)}.school-skin .c1-lab-preview{color:#d5e6ef;background:#1a2a32}@media (max-width:640px){.school-skin .c1-lab-ask{border-right:0;border-bottom:1px solid var(--sch-stroke)}.school-skin .course-memo-actions{flex-direction:column;align-items:stretch}.school-skin .course-memo-actions .button,.school-skin .course-memo-actions .lesson-nav .button{width:100%;min-width:0}.school-skin .course-memo-actions .lesson-nav{justify-content:stretch;width:100%}.school-skin .course-memo-actions .lesson-nav .button{flex:1 1 0}}.school-skin .weblab-intro{align-items:center;gap:40px;min-height:calc(100dvh - 8rem);padding-top:48px;display:grid}.school-skin .weblab-intro-copy{min-width:0}.school-skin .weblab-intro-lead{font-family:var(--sch-display);letter-spacing:-.03em;color:var(--sch-text);margin:0 0 12px;font-size:28px;font-style:italic;font-weight:400;line-height:1.2}.school-skin .weblab-intro-sub{color:var(--sch-muted);margin:0 0 32px;font-size:14px;line-height:1.6}.school-skin .weblab-intro-actions{flex-wrap:wrap;gap:12px;display:flex}.school-skin .weblab-intro-actions .button{width:auto;min-width:8rem}.school-skin .weblab-intro-silhouette{border:1px solid var(--sch-stroke);background:#0f0f0f;border-radius:24px;grid-template-columns:minmax(0,1fr) minmax(0,1.1fr);gap:10px;min-height:22rem;padding:12px;display:none}.school-skin .weblab-intro-silhouette__pane{background:#141414;border:1px solid #1f1f1f;border-radius:16px;align-content:start;gap:10px;padding:14px 12px;display:grid}.school-skin .weblab-intro-silhouette__pane span,.school-skin .weblab-intro-silhouette__pane i{background:#242424;border-radius:9999px;height:10px;display:block}.school-skin .weblab-intro-silhouette__files span:first-child{width:42%}.school-skin .weblab-intro-silhouette__files span:nth-child(2){width:68%}.school-skin .weblab-intro-silhouette__files span:nth-child(3){width:54%}.school-skin .weblab-intro-silhouette__chat span:first-child{width:56%}.school-skin .weblab-intro-silhouette__chat span:nth-child(2){width:38%}.school-skin .weblab-intro-silhouette__chat i{background:#1a1a1a;border-radius:12px;width:100%;height:3.25rem;margin-top:auto}.school-skin .weblab-intro>h1,.school-skin .weblab-intro-copy>h1{margin-bottom:16px;font-size:56px}@media (max-width:639px){.school-skin .weblab-intro{text-align:center;justify-items:center;padding-top:72px}.school-skin .weblab-intro-copy{flex-direction:column;align-items:center;max-width:22rem;display:flex}.school-skin .weblab-intro-copy>h1{letter-spacing:-.04em;font-size:48px}.school-skin .weblab-intro-lead{font-size:22px}.school-skin .weblab-intro-sub{max-width:18rem}.school-skin .weblab-intro-actions{justify-content:center}}@media (min-width:640px){.school-skin .weblab-intro{grid-template-columns:minmax(0,1fr) minmax(14rem,18rem)}.school-skin .weblab-intro-silhouette{display:grid}}.school-skin .button{background:var(--sch-text);width:100%;min-height:48px;color:var(--sch-bg);border:1px solid #0000;border-radius:9999px;padding:12px 24px;font-size:14px;font-weight:500}.school-skin .button-secondary{border-color:var(--sch-stroke);color:var(--sch-text);background:0 0}.school-skin .button-danger{border-color:var(--danger);color:var(--danger);background:0 0}.school-skin .field input,.school-skin .field textarea,.school-skin .c5-form .field textarea,.school-skin .help-form .field textarea,.school-skin .kind-picker{border:1px solid var(--sch-stroke);background:var(--sch-bg);color:var(--sch-text);border-radius:16px}.school-skin .field input{min-height:48px;padding:12px 16px}.school-skin .field input:focus,.school-skin .field textarea:focus{border-color:#fff3;outline:none}.school-skin .alert,.school-skin .notice,.school-skin .help-card,.school-skin .c5-current,.school-skin .invite-card,.school-skin .video-frame,.school-skin .kind-note,.school-skin .lab-sql,.school-skin .c4-redirects code{border-width:1px;border-radius:16px}.school-skin .notice{background:#ffffff08}.school-skin .alert{background:#f8717114}.school-skin .backup{border-top:1px solid var(--sch-stroke);margin-top:24px;padding-top:16px}.school-skin .backup summary{color:var(--sch-muted);font-weight:500}.school-skin .card-list{gap:16px}.school-skin .card-link,.school-skin .card-static{border:1px solid var(--sch-stroke);background:var(--sch-surface);border-radius:28px;padding:24px 28px}.school-skin .card-link:hover{background:var(--sch-surface);border-color:#ffffff26}.school-skin .card-link h2,.school-skin .card-link h3,.school-skin .card-static h3{margin:16px 0 8px;font-size:20px;font-weight:500;line-height:1.35}.school-skin .card-link p{font-family:var(--sch-mono);color:var(--sch-muted);margin:0 0 8px;font-size:13px;line-height:1.625}.school-skin .card-action{color:var(--sch-muted);margin-top:12px;font-size:12px;font-weight:500;display:inline-block}.school-skin .card-link:hover .card-action{color:var(--sch-text)}.school-skin .code{font-family:var(--sch-mono);letter-spacing:.04em;font-size:14px;font-weight:500}.school-skin .badge{border:1px solid var(--sch-stroke);letter-spacing:.02em;background:#ffffff0d;border-radius:9999px;padding:4px 10px;font-size:11px;font-weight:500}.school-skin .badge-muted{background:0 0}.school-skin .billing-price{flex-wrap:wrap;align-items:baseline;gap:8px 12px;margin:12px 0 0;display:flex}.school-skin .billing-price__was{color:var(--sch-muted);text-decoration:line-through}.school-skin .billing-price__now{font-size:22px;font-weight:500}.school-skin .school-block{border:1px solid var(--sch-stroke);background:var(--sch-surface);border-radius:28px;margin-top:24px;padding:24px}.school-skin .school-action-head{justify-content:space-between;align-items:center;gap:12px;margin-bottom:16px;display:flex}.school-skin .school-block .school-action-head+.lab-launch{margin-top:0}.school-skin .school-action-head__btn{width:auto;min-width:0;min-height:36px;color:var(--sch-text);white-space:nowrap;background:#ffffff0f;border-color:#ffffff47;padding:6px 14px;font-size:13px;text-decoration:none}.school-skin .school-block>h2,.school-skin .school-block .school-action-head h2,.school-skin .school-block .lesson-group h2,.school-skin .school-block .checklist h2,.school-skin .school-block .kind-note h2,.school-skin .school-block .c5-record h2{letter-spacing:.08em;color:var(--sch-muted);margin:0 0 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.invite-person{border-top:1px solid var(--sch-stroke);padding:16px 0 0}.school-skin .invite-person:first-child{border-top:0;padding-top:0}.school-skin .invite-person__name{margin:0 0 8px;font-weight:600}.school-skin .invite-purchases{gap:8px;margin:0 0 8px;padding:0;list-style:none;display:grid}.school-skin .invite-purchases li,.school-skin .invite-purchase-row{gap:4px;display:grid}.school-skin .invite-payout-form{border-top:1px solid var(--sch-stroke);gap:12px;margin-top:24px;padding-top:16px;display:grid}.school-skin .invite-payout-form h3{margin:0}.school-skin .invite-payout-kind{flex-wrap:wrap;gap:8px;display:flex}.school-skin .invite-payout-kind button{border:1px solid var(--sch-stroke);width:auto;min-height:36px;color:var(--sch-muted);font:inherit;cursor:pointer;background:0 0;border-radius:9999px;padding:6px 12px;font-size:13px;font-weight:500}.school-skin .invite-payout-kind button.is-active{background:var(--sch-text);color:var(--sch-bg);border-color:#0000}.school-skin .invite-payout-form .field{margin-bottom:0}.school-skin .invite-payout-block{border:0;gap:12px;margin:0;padding:0;display:grid}.school-skin .invite-payout-block legend{padding:0;font-weight:600}.school-skin .invite-payout-form select{border:1px solid var(--sch-stroke);background:var(--sch-surface);min-height:48px;color:var(--sch-text);border-radius:12px;padding:12px 16px}.school-skin .staff-payout{gap:4px;margin:12px 0;display:grid}.school-skin .help-card{background:var(--sch-surface)}.school-skin .staff-table-wrap{overflow-x:auto}.school-skin .staff-table{min-width:1100px}.school-skin .staff-table th,.school-skin .staff-table td{border:1px solid var(--sch-stroke);background:var(--sch-surface);color:var(--sch-text)}.school-skin .staff-table th{color:var(--sch-muted);font-size:13px;font-weight:500}.school-skin .staff-table .staff-status{border:1px solid var(--sch-stroke);min-height:24px;color:var(--sch-muted);white-space:nowrap;writing-mode:horizontal-tb;border-radius:9999px;align-items:center;margin:0 0 6px;padding:2px 10px;font-size:11px;font-weight:500;line-height:1.4;display:inline-flex}.school-skin .staff-table .button,.school-skin .staff-table .button-inline,.school-skin .staff-table .button-secondary{border:1px solid var(--sch-stroke);width:auto;max-width:none;min-height:32px;color:var(--sch-text);white-space:nowrap;writing-mode:horizontal-tb;text-orientation:mixed;background:0 0;border-radius:9999px;margin-top:0;padding:4px 12px;font-size:12px;font-weight:500}.school-skin .staff-table .button.staff-action--on{background:var(--sch-text);color:var(--sch-bg);border-color:#0000}.school-skin .lab-dialog{border:1px solid var(--sch-stroke);background:var(--sch-surface);color:var(--sch-text);border-radius:20px}.school-skin .lab-code-dialog{width:min(40rem,100% - 2rem);max-height:85dvh;overflow-y:auto}.school-skin 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