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.lesson-page{background:var(--oone-canvas)}.lesson-topbar{border-color:var(--oone-border);background:color-mix(in srgb, var(--oone-surface) 94%, transparent);height:58px;min-height:58px;box-shadow:var(--oone-shadow-xs);padding:0 clamp(20px,3vw,36px);top:72px}.breadcrumbs{min-width:0}.breadcrumbs span:first-child,.breadcrumbs strong{text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.breadcrumbs strong{color:var(--oone-text-secondary);font-weight:650}.lesson-topbar-actions{flex:none;align-items:center;gap:14px;display:flex}.reading-progress-label{color:var(--oone-text-tertiary);font-size:.68rem;font-weight:650}.reading-progress-track{background:0 0;height:2px;position:absolute;bottom:-1px;left:0;right:0;overflow:hidden}.reading-progress-track span{background:var(--oone-primary);border-radius:99px;height:100%;transition:width .12s linear;display:block}.lesson-playerbar{border-color:var(--oone-border);box-shadow:var(--oone-shadow-xs);top:130px}.lesson-wrap{width:min(900px,100% - 48px);padding:40px 0 100px}.lesson-meta-card{border:1px solid var(--oone-border);border-radius:var(--oone-radius-md);background:var(--oone-surface);justify-content:space-between;align-items:center;gap:18px;margin-bottom:16px;padding:13px 16px;display:flex}.content-sequence{color:var(--oone-primary);letter-spacing:.12em;font-size:.67rem;font-weight:750}.lesson-meta{gap:16px;margin:0}.lesson-meta span{letter-spacing:0;align-items:center;gap:6px;font-size:.7rem;display:inline-flex}.reader-surface{border:1px solid var(--oone-border);border-radius:var(--oone-radius-xl);background:var(--oone-surface);box-shadow:var(--oone-shadow-sm);padding:clamp(28px,5vw,54px)}.reader-surface .markdown-body{max-width:760px;margin:0 auto;font-size:1.05rem;line-height:1.78}.reader-surface .markdown-body h1{font-size:clamp(2rem,5vw,3rem);font-weight:760;line-height:1.08}.reader-surface .markdown-body h2{font-size:1.65rem;font-weight:720}.reader-surface .markdown-body h3{font-size:1.3rem;font-weight:700}.reader-surface .markdown-body blockquote{border-radius:0 var(--oone-radius-md) var(--oone-radius-md) 0}.reader-surface .table-scroll{border-radius:var(--oone-radius-md)}.lesson-completion-card{border:1px solid var(--oone-border);border-radius:var(--oone-radius-lg);background:var(--oone-surface);justify-content:space-between;align-items:center;gap:20px;margin-top:24px;padding:20px;display:flex}.lesson-completion-card>div{align-items:center;gap:13px;min-width:0;display:flex}.completion-icon{background:var(--oone-primary-soft);width:42px;height:42px;color:var(--oone-primary);border-radius:50%;flex:none;place-items:center;display:grid}.lesson-completion-card strong{color:var(--oone-text);font-size:.9rem;display:block}.lesson-completion-card p{color:var(--oone-text-tertiary);margin:3px 0 0;font-size:.72rem}.lesson-completion-card button{border:1px solid var(--oone-primary);border-radius:var(--oone-radius-md);background:var(--oone-primary);color:#fff;cursor:pointer;flex:none;min-height:40px;padding:0 15px;font-size:.75rem;font-weight:700}.lesson-completion-card.done{border-color:color-mix(in srgb, var(--oone-positive) 32%, var(--oone-border))}.lesson-completion-card.done .completion-icon{background:var(--oone-positive-soft);color:var(--oone-positive)}.lesson-completion-card.done button{border-color:var(--oone-border);background:var(--oone-surface-subtle);color:var(--oone-text-secondary)}.lesson-pagination{border-color:var(--oone-border);margin-top:24px;padding-top:24px}.page-link{border-radius:var(--oone-radius-md);background:var(--oone-surface);min-height:76px;box-shadow:var(--oone-shadow-xs);padding:16px 18px}.page-link:hover{border-color:var(--oone-primary);color:var(--oone-text);box-shadow:var(--oone-shadow-sm)}html[data-theme=dark] .lesson-topbar,html[data-theme=dark] .lesson-meta-card,html[data-theme=dark] .reader-surface,html[data-theme=dark] .lesson-completion-card{background:var(--oone-surface);border-color:var(--oone-border)}@media (max-width:760px){.lesson-topbar{height:auto;min-height:58px;padding:10px 14px;position:relative;top:auto}.breadcrumbs{display:none}.lesson-topbar-actions{justify-content:space-between;width:100%}.reading-progress-label{display:inline}.lesson-playerbar{top:60px}.lesson-wrap{width:min(100% - 28px,900px);padding:20px 0 70px}.lesson-meta-card{flex-direction:column;align-items:flex-start;gap:9px}.lesson-meta{display:flex}.reader-surface{border-radius:var(--oone-radius-lg);padding:24px 20px}.reader-surface .markdown-body{font-size:1rem;line-height:1.72}.reader-surface .markdown-body h1{font-size:2rem}.lesson-completion-card{flex-direction:column;align-items:stretch}.lesson-completion-card button{width:100%}}
.status-page{background:radial-gradient(circle at 50% 10%, var(--oone-primary-soft), transparent 36%), var(--oone-canvas);place-items:center;min-height:100dvh;padding:24px;display:grid}.status-card{border:1px solid var(--oone-border);border-radius:var(--oone-radius-xl);background:var(--oone-surface);width:min(100%,520px);box-shadow:var(--oone-shadow-lg);text-align:center;padding:clamp(30px,6vw,54px)}.status-logo{width:190px;margin:0 auto 28px}.status-code{color:var(--oone-primary);letter-spacing:.16em;font-size:.7rem;font-weight:800}.status-card h1{color:var(--oone-text);margin:10px 0;font-size:clamp(2rem,5vw,2.8rem);line-height:1.05}.status-card p{color:var(--oone-text-secondary);margin:0 auto 28px;line-height:1.6}.status-actions{justify-content:center;gap:10px;display:flex}.loading-page{background:var(--oone-canvas);grid-template-columns:300px 1fr;min-height:100dvh;display:grid}.loading-sidebar{border-right:1px solid var(--oone-border);background:var(--oone-surface)}.loading-content{align-content:start;gap:20px;padding:90px clamp(24px,5vw,70px);display:grid}.skeleton-row{grid-template-columns:repeat(3,1fr);gap:16px;display:grid}.skeleton{border:1px solid var(--oone-border);border-radius:var(--oone-radius-lg);background:var(--oone-surface);overflow:hidden}.skeleton:after{content:"";background:linear-gradient(90deg, transparent, var(--oone-primary-soft), transparent);width:45%;height:100%;animation:1.3s ease-in-out infinite skeleton-shimmer;display:block}.skeleton.hero{height:210px}.skeleton.metric{height:84px}.skeleton.panel{height:300px}@keyframes skeleton-shimmer{0%{transform:translate(-120%)}to{transform:translate(280%)}}@media (max-width:760px){.status-actions{flex-direction:column;align-items:stretch}.loading-page{display:block}.loading-sidebar{border-right:0;border-bottom:1px solid var(--oone-border);height:60px}.loading-content{padding:24px 16px}.skeleton-row{grid-template-columns:1fr;gap:10px}.skeleton.hero{height:220px}.skeleton.metric{height:70px}}
.auth-page{background:var(--oone-canvas);grid-template-columns:minmax(360px,.9fr) minmax(480px,1.1fr);min-height:100dvh;display:grid;position:relative}.auth-theme{z-index:5;position:fixed;top:22px;right:24px}.auth-showcase{color:#fff;background:radial-gradient(circle at 82% 18%,#5589ff6b,#0000 26%),radial-gradient(circle at 15% 85%,#0d5ffd47,#0000 32%),linear-gradient(145deg,#020716 0%,#071a45 55%,#0847c9 150%);flex-direction:column;min-height:100dvh;padding:clamp(36px,6vw,82px);display:flex;overflow:hidden}.auth-showcase-logo{width:min(250px,70%)}.auth-showcase-logo .brand-logo-light{display:none!important}.auth-showcase-logo .brand-logo-dark{display:block!important}.auth-showcase-copy{max-width:580px;margin:auto 0 34px}.auth-showcase-copy>span,.auth-eyebrow{color:#75a3ff;letter-spacing:.14em;font-size:.68rem;font-weight:800}.auth-showcase-copy h2{color:#fff;letter-spacing:-.055em;max-width:520px;margin:14px 0 18px;font-size:clamp(2.7rem,5vw,5rem);font-weight:780;line-height:.96}.auth-showcase-copy p{color:#e6edffbd;max-width:540px;margin:0;font-size:.95rem;line-height:1.7}.auth-showcase ul{color:#f0f4ffd1;gap:12px;margin:0 0 44px;padding:0;font-size:.8rem;list-style:none;display:grid}.auth-showcase li{align-items:center;gap:9px;display:flex}.auth-showcase li svg{color:#75a3ff}.auth-showcase>small{color:#d2defa80;letter-spacing:.1em;text-transform:uppercase;font-size:.68rem}.auth-card{border:1px solid var(--oone-border);border-radius:var(--oone-radius-xl);background:var(--oone-surface);width:min(100% - 48px,470px);box-shadow:var(--oone-shadow-lg);color:var(--oone-text);place-self:center;padding:clamp(28px,4vw,48px)}.auth-mobile-logo{width:180px;margin-bottom:28px;display:none}.auth-card h1{letter-spacing:-.045em;margin:9px 0 8px;font-size:clamp(2rem,4vw,2.65rem)}.auth-card>p{color:var(--oone-text-secondary);margin:0 0 30px}.auth-card form{gap:18px;display:grid}.auth-field{color:var(--oone-text-secondary);gap:7px;font-size:.78rem;font-weight:700;display:grid}.auth-field input{border:1px solid var(--oone-border-strong);border-radius:var(--oone-radius-md);background:var(--oone-surface-subtle);width:100%;height:50px;color:var(--oone-text);font:inherit;outline:none;padding:0 14px}.auth-field input:focus{border-color:var(--oone-primary);box-shadow:0 0 0 3px var(--oone-primary-soft)}.auth-field small{color:var(--oone-text-tertiary);font-weight:450}.password-input{display:block;position:relative}.password-input input{padding-right:48px}.password-input button{width:40px;height:40px;color:var(--oone-text-tertiary);background:0 0;border:0;place-items:center;padding:0;display:grid;position:absolute;top:5px;right:5px}.auth-card form>button{border-radius:var(--oone-radius-md);background:var(--oone-primary);color:#fff;cursor:pointer;height:50px;transition:background-color var(--oone-duration-fast) var(--oone-ease), transform var(--oone-duration-fast) var(--oone-ease);border:0;font-weight:750}.auth-card form>button:hover:not(:disabled){background:var(--oone-primary-hover)}.auth-card form>button:active:not(:disabled){transform:translateY(1px)}.auth-card button:disabled{opacity:.65;cursor:wait}.auth-link{color:var(--oone-primary);text-align:center;font-size:.78rem;font-weight:700}.auth-error,.auth-success{border-radius:var(--oone-radius-sm);padding:11px 13px;font-size:.78rem;margin:0!important}.auth-error{background:var(--oone-negative-soft);color:var(--oone-negative)!important}.auth-success{background:var(--oone-positive-soft);color:var(--oone-positive)!important}html[data-theme=dark] .auth-card{background:var(--oone-surface)}@media (max-width:900px){.auth-page{background:radial-gradient(circle at 50% 0, var(--oone-primary-soft), transparent 42%), var(--oone-canvas);grid-template-columns:1fr;place-items:center;padding:72px 20px 32px}.auth-showcase{display:none}.auth-card{width:min(100%,470px)}.auth-mobile-logo{display:block}}@media (max-width:520px){.auth-theme{top:14px;right:14px}.auth-page{padding-inline:14px}.auth-card{padding:28px 22px}}