.content-page{max-width:880px}.content-author-page{max-width:1280px}.content-page>.text-link{margin-bottom:22px;display:inline-flex}.content-page .page-header{margin:22px 0 28px}.content-page h2{letter-spacing:-.02em;margin:0 0 14px;font-size:1.25rem}.content-page h3{font-size:1rem}.content-page p,.content-page li{line-height:1.75}.content-panel{background:var(--panel);border:1px solid var(--line);border-radius:18px;min-width:0;margin-bottom:24px;padding:26px}.content-panel>:last-child{margin-bottom:0}.content-teaching>p:last-child{white-space:pre-wrap;font-size:1.04rem;line-height:1.85}.content-eyebrow{text-transform:uppercase;letter-spacing:.09em;color:var(--teal-deep);margin:0 0 8px;font-size:.75rem}.content-meta{color:var(--ink-soft);overflow-wrap:anywhere;font-size:.8rem}.content-actions{flex-wrap:wrap;align-items:center;gap:12px;margin:22px 0;display:flex}.content-page .button{min-height:44px}.content-page button:disabled{opacity:.55;cursor:not-allowed}.content-form{gap:18px;display:grid}.content-form label{gap:8px;font-weight:550;display:grid}.content-form input:not([type=radio]):not([type=checkbox]),.content-form textarea{border:1px solid var(--line-strong);background:var(--paper,#fff);width:100%;min-width:0;color:var(--ink);font:inherit;border-radius:8px;padding:11px 12px;line-height:1.5}.content-form textarea{resize:vertical}.content-form select{border:1px solid var(--line-strong);background:var(--paper,#fff);width:100%;color:var(--ink);font:inherit;border-radius:8px;min-height:44px;padding:11px 12px}.content-field-editor,.content-field-editor>fieldset{gap:16px;display:grid}.content-form fieldset{border:1px solid var(--line);border-radius:12px;min-width:0;padding:18px}.content-form legend{padding:0 8px;font-weight:600;line-height:1.6}.content-form .content-choice{align-items:start;gap:10px;padding:8px 0;font-weight:400;line-height:1.6;display:flex}.content-choice input{accent-color:var(--teal-deep);flex-shrink:0;margin-top:6px}.content-form .button{justify-self:start}.content-notice{border-left:3px solid var(--teal);background:var(--teal-pale);border-radius:0 8px 8px 0;margin:20px 0;padding:14px 18px}.content-error{border-color:var(--danger);background:var(--coral-pale)}.content-result{border-color:var(--teal)}.tutor-message{white-space:pre-wrap;overflow-wrap:anywhere;margin:16px 0;line-height:1.75}.tutor-math-display{max-width:100%;display:block;overflow-x:auto}.tutor-math-inline{vertical-align:middle;max-width:100%;display:inline-block;overflow-x:auto}.content-author-grid{grid-template-columns:270px minmax(0,1fr);align-items:start;gap:24px;display:grid}.content-version-list{max-height:650px;margin:0;padding:0;list-style:none;overflow-y:auto}.content-version{text-align:left;border:1px solid var(--line);width:100%;color:var(--ink);background:0 0;border-radius:10px;margin-bottom:10px;padding:12px}.content-version span{color:var(--ink-soft);margin-top:5px;font-size:.78rem;display:block}.content-version.selected{border-color:var(--teal);background:var(--teal-pale)}.content-job-link{min-height:44px;color:var(--teal-deep);background:0 0;border:0;margin-left:12px;text-decoration:underline}.content-form .content-json{font-family:var(--font-geist-mono), monospace;tab-size:2;font-size:.8rem}.content-review{border-top:1px solid var(--line);margin-top:26px;padding-top:22px}.content-page summary{cursor:pointer;font-weight:650;line-height:1.6}.content-source{border-top:1px solid var(--line);padding:18px 0}.content-source blockquote{border-left:2px solid var(--line-strong);white-space:pre-wrap;color:var(--ink-soft);margin:16px 0;padding-left:16px;line-height:1.7}.lesson-position{justify-content:space-between;align-items:start;gap:18px;margin-bottom:16px;display:flex}.lesson-position>p{margin:0}.content-page .lesson-outline{max-width:70%}.content-page .lesson-outline nav{gap:8px;padding:14px 0;display:grid}.content-page .lesson-outline button{text-align:left;color:var(--teal-deep);font:inherit;cursor:pointer;background:0 0;border:0;min-height:44px;padding:8px 0;line-height:1.5}.content-page .lesson-outline button[aria-current]{font-weight:700}.lesson-intuition{font-size:1.12rem;line-height:1.85}.content-teaching-copy{white-space:pre-wrap;overflow-wrap:anywhere}.lesson-extra{border-top:1px solid var(--line);padding:14px 0}.lesson-extra summary,.explanation-check summary,.explanation-model summary{min-height:32px;color:var(--ink-soft);font-weight:500;display:list-item}.lesson-extra dt{font-weight:650}.lesson-extra dd{margin:4px 0 16px;line-height:1.75}.lesson-provenance{margin-top:26px}.lesson-step-actions{justify-content:space-between}.lesson-step-actions>.button{margin-left:auto}.content-page h2:focus{outline:none}.content-page h2:focus-visible{outline:2px solid var(--teal);outline-offset:6px}.content-page button.text-link{font:inherit;cursor:pointer;background:0 0;border:0;min-height:44px;padding:8px 0}.teach-back>p{margin:0}.explanation-review{border-top:1px solid var(--line);padding-top:18px}.explanation-review h3{margin:0 0 8px;font-size:1.05rem;font-weight:650}.explanation-check{padding:12px 0}.explanation-check details{padding-left:26px}.explanation-model{margin:18px 0}.teach-back input[type=checkbox]{width:18px;height:18px}@media (max-width:850px){.content-author-grid{grid-template-columns:1fr;gap:0}.content-version-list{max-height:260px}}@media (max-width:600px){.content-panel{padding:20px 16px}.content-form fieldset{padding:14px 10px}}