.ink-controller,.ink-board,.ink-archive{color:#173d50;background:#fff;border:1px solid #ccdade;border-radius:18px;padding:20px}.ink-controller{margin:18px 0}.ink-launch,.ink-board-header{justify-content:space-between;align-items:center;gap:20px;display:flex}.ink-launch strong,.ink-board-header strong{font-size:1.15rem;display:block}.ink-launch p{color:#536b75;margin:6px 0;font-size:.95rem}.ink-controller button,.ink-controller a,.ink-board button,.ink-board select{font:inherit;font-size:.95rem}.ink-controller button,.ink-link-actions a,.ink-board button,.ink-board select{color:#173d50;background:#fff;border:1px solid #bacdd1;border-radius:9px;min-height:44px;padding:10px 14px}.ink-controller button:first-child{color:#fff;background:#173d50}.ink-link-actions{flex-wrap:wrap;gap:8px;display:flex}.ink-link-actions a{align-items:center;text-decoration:none;display:inline-flex}.ink-history-link{margin:12px 0;display:inline-block}.ink-controller summary{cursor:pointer;padding:12px 0;font-size:1rem}.ink-controller details>.ink-board{margin-top:10px}.ink-workspace{background:#eef4f5;max-width:1380px;min-height:100dvh;margin:0 auto;padding:16px}.ink-top-nav{justify-content:space-between;gap:16px;padding:8px 4px 20px;font-size:1rem;display:flex}.ink-top-nav a{color:#173d50;font-weight:700}.ink-eyebrow{color:#287d75;letter-spacing:.12em;margin-bottom:4px;font-size:.8rem;display:block}.ink-status{color:#4c6871;font-size:.9rem}.ink-pages,.ink-tools{flex-wrap:wrap;align-items:center;gap:8px;margin:18px 0;display:flex}.ink-pages select{width:340px;max-width:100%}.ink-pages label,.ink-tools label{align-items:center;gap:8px;font-size:.9rem;display:flex}.ink-tools button[aria-pressed=true],.ink-pages button[aria-pressed=true]{background:#e0f0ee;border-color:#237c70;box-shadow:inset 0 0 0 1px #237c70}.ink-tools .ink-color{width:44px;padding:8px}.ink-color i{border-radius:50%;width:22px;height:22px;display:block}.ink-problem{border-top:1px solid #e0e8eb;padding:18px 0}.ink-problem small{color:#237c70;font-size:.9rem}.ink-problem h2{margin:8px 0;font-size:1.35rem;line-height:1.7}.ink-problem p{font-size:1rem;line-height:1.75}.ink-paper{aspect-ratio:5/3;-webkit-user-select:none;user-select:none;background:#fff;border:1px solid #c9d9df;border-radius:10px;width:100%;height:auto;display:block}.ink-caption{color:#536b75;font-size:.9rem;line-height:1.7}.ink-error{color:#963527;background:#fff3ef;border:1px solid #ecc5b8;border-radius:10px;padding:12px;line-height:1.65}.ink-error button{margin-left:8px}.ink-archive ul{padding:0;list-style:none}.ink-archive li a{color:#173d50;border-bottom:1px solid #d6e1e4;padding:18px;display:block}.ink-tools button:disabled{opacity:.5}:is(.ink-board :focus-visible,.ink-controller :focus-visible){outline-offset:3px;outline:3px solid #237c70}@media (max-width:800px){.ink-workspace{padding:8px}.ink-board{padding:12px}.ink-launch{flex-direction:column;align-items:flex-start}.ink-pages label{flex-direction:column;align-items:flex-start;width:100%}.ink-pages select{width:100%}.ink-board-header{align-items:flex-start}.ink-tools{gap:6px}.ink-tools button,.ink-tools select{padding:8px}.ink-problem h2{font-size:1.12rem}.ink-link-actions{flex-direction:column;width:100%}}@media print{.ink-tools,.ink-pages,.ink-top-nav,.ink-status{display:none}.ink-workspace,.ink-board{border:0;padding:0}}.ink-context{color:#536b75;margin:10px 0;font-size:.95rem;line-height:1.6}.ink-live-board{margin-top:18px}.diagram-controls{border-top:1px solid #d6e5e3;padding:18px 0 4px}.diagram-controls details{margin-top:14px}.diagram-controls summary{cursor:pointer;background:#eaf4f2;border-radius:8px;padding:12px;font-weight:700}.diagram-controls fieldset{border:0;gap:14px;min-width:0;padding:12px 0;display:grid}.diagram-controls label{gap:6px;font-size:14px;font-weight:600;display:grid}.diagram-controls input:not([type=checkbox]):not([type=range]),.diagram-controls select{color:#173d50;box-sizing:border-box;background:#fff;border:1px solid #bfcece;border-radius:8px;width:100%;min-height:42px;padding:8px}.diagram-fields{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin:12px 0;display:grid}.diagram-presets,.diagram-checks{flex-wrap:wrap;gap:10px;display:flex}.diagram-checks label{align-items:center;display:flex}.diagram-readout{background:#f3f8f7;border-radius:8px;flex-wrap:wrap;gap:8px 18px;margin:10px 0;padding:12px;font-size:14px;display:flex}.diagram-readout strong{overflow-wrap:anywhere;width:100%}.diagram-readout small{color:#526c77;width:100%;line-height:1.6}.diagram-red{color:#a52e2e}.diagram-blue{color:#315ed1}.diagram-preview{background:#f9fcfb;border:1px dashed #96bcb6;border-radius:10px;margin:14px 0;padding:10px}.diagram-preview>small{color:#526c77}.diagram-preview svg{width:100%;max-width:640px;margin:auto;display:block}.diagram-probes>p,.diagram-controls details>p{color:#526c77;font-size:13px}.diagram-controls button{min-height:40px}.diagram-controls input[type=range]{accent-color:#287e78;width:100%}.diagram-controls input[type=checkbox]{accent-color:#287e78}.diagram-controls button:disabled{opacity:.5}@media (max-width:560px){.diagram-fields{grid-template-columns:1fr}.diagram-readout{font-size:12px}}.prepared-lesson-diagrams,.prepared-diagram-picker{color:#173d50;background:#f8fcfb;border:1px solid #b8d8d2;border-radius:12px;min-width:0;padding:18px}.prepared-lesson-diagrams h3,.prepared-diagram-picker h3{margin:0 0 12px;font-size:1rem}.prepared-lesson-diagrams p,.prepared-diagram-picker p{font-size:.875rem;line-height:1.7}.prepared-lesson-diagrams label,.prepared-diagram-picker label{gap:6px;font-size:.875rem;display:grid}.prepared-lesson-diagrams select,.prepared-diagram-picker select{width:100%;min-width:0;color:inherit;font:inherit;background:#fff;border:1px solid #b8cbc9;border-radius:8px;padding:12px}.prepared-diagram-question{padding:12px 0}.prepared-diagram-picker button{color:#fff;font:inherit;cursor:pointer;background:#237c70;border:1px solid #237c70;border-radius:8px;padding:12px 20px}.prepared-diagram-picker button:disabled{opacity:.6;cursor:wait}.diagram-parameters,.diagram-parameter-editor{background:#f0f7f6;border:1px solid #c5ddda;border-radius:12px;gap:12px;margin:16px 0;padding:16px;display:grid}.diagram-parameters label{gap:8px;font-weight:700;display:grid}.diagram-parameters input[type=range]{accent-color:#287e78;width:100%;min-height:36px}.diagram-parameters input[type=number]{border:1px solid #c5ddda;border-radius:6px;width:100%;min-height:42px;padding:8px}.diagram-parameters small{color:#526b77;font-weight:400}.diagram-parameter-editor>div{flex-wrap:wrap;align-items:end;gap:10px;display:flex}.diagram-parameter-editor>div>label{flex:110px;min-width:0}.diagram-parameter-editor p{color:#526b77;margin:0}.diagram-parameter-editor input{width:100%}.live-student-session .live-student-stage{box-sizing:border-box;align-items:center;width:100%;min-height:calc(100dvh - 180px);padding:32px clamp(20px,4vw,80px)}.live-student-stage.with-diagram{grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:clamp(24px,4vw,64px);display:grid}.live-student-stage .live-student-problem{width:100%;min-width:0;margin:auto;animation:none}.live-student-stage.with-diagram h1{font-size:clamp(26px,2.7vw,48px);line-height:1.5}.live-student-stage.with-diagram .student-explanation{font-size:clamp(17px,1.5vw,24px);line-height:1.8}.live-student-stage.with-diagram .math-block{margin:24px 0;font-size:clamp(24px,2.5vw,44px)}.live-lesson-diagram{color:#173d50;box-sizing:border-box;background:#fff;border:1px solid #d9e5e3;border-radius:18px;width:100%;min-width:0;padding:18px}.live-lesson-diagram .ink-paper{touch-action:auto;border:0;width:100%;height:auto;max-height:46dvh;display:block}.live-lesson-diagram .diagram-readout{flex-wrap:wrap;gap:8px 16px;margin:12px 0;font-size:15px;line-height:1.5;display:flex}.live-lesson-diagram .diagram-readout small{flex-basis:100%;font-size:12px}.live-diagram-controls{border:0;border-top:1px solid #d9e5e3;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:12px;margin:0;padding:14px 0 0;display:grid}.live-diagram-controls legend{padding:0 10px 0 0;font-size:14px;font-weight:700}.live-diagram-field{grid-template-columns:minmax(0,1fr) 76px;align-items:center;gap:8px;font-size:14px;display:grid}.live-diagram-field>span{grid-column:1/-1;justify-content:space-between;gap:8px;display:flex}.live-diagram-field input[type=range]{accent-color:#287e78;touch-action:pan-y;width:100%;min-width:0;min-height:40px}.live-diagram-field input[type=number]{box-sizing:border-box;border:1px solid #b9cecb;border-radius:8px;width:100%;min-width:0;height:40px;padding:6px}.live-diagram-status{color:#607781;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:8px;margin-top:8px;font-size:12px;display:flex}.live-lesson-diagram button{color:#173d50;cursor:pointer;background:#eff7f5;border:1px solid #b9cecb;border-radius:8px;padding:8px 12px}:is(.live-lesson-diagram input:focus-visible,.live-lesson-diagram button:focus-visible){outline-offset:3px;outline:3px solid #bf8c33}@media (max-width:900px){.live-student-stage.with-diagram{grid-template-columns:minmax(0,1fr)}.live-student-session .live-student-stage{padding:24px 18px}.live-lesson-diagram .ink-paper{max-height:45dvh}.live-student-stage.with-diagram h1{font-size:28px}}.lesson-inline-figure{border:0;border-top:1px solid #d9e5e3;border-radius:0;min-width:0;margin:0;padding:20px}.lesson-inline-figure[hidden]{display:none}.lesson-inline-figure .lesson-figure-help{color:#526c77;margin:12px 0 0;font-size:14px;line-height:1.6}.lesson-inline-figure .ink-history-link{margin:8px 0 0;font-size:13px}.lesson-figure-settings{margin-top:14px}.lesson-figure-settings summary{cursor:pointer;font-size:14px;font-weight:700}.lesson-figure-view.preview{padding:0 10px 10px}.lesson-figure-view.preview .live-lesson-diagram{border:0;padding:6px}.lesson-figure-view.preview .diagram-readout{display:none}.lesson-figure-view.preview>p{font-size:12px}.normal-problem-content.with-figure{min-height:0;padding:22px 28px}.normal-problem-content.with-figure .math-block{margin:16px 0}@media (max-width:600px){.lesson-inline-figure{padding:12px}.normal-problem-content.with-figure{padding:18px}}.normal-lesson-shell .normal-problem-toolbar,.normal-lesson-shell .normal-problem-toolbar>div{flex-wrap:wrap}.normal-lesson-shell .normal-problem-toolbar button{height:auto;min-height:40px;font-size:14px}.normal-lesson-shell .normal-problem-toolbar small{font-size:12px}.lesson-figure-header{justify-content:space-between;align-items:center;gap:1rem;margin-bottom:1rem;display:flex}.lesson-figure-header button{color:#173d50;cursor:pointer;background:#fff;border:1px solid #bfd3d4;border-radius:8px;padding:.55rem .8rem}.diagram-teaching-guide{color:#243d48;text-align:left;overflow-wrap:anywhere;background:#fffaf0;border:1px solid #e5d7b9;border-radius:12px;margin:16px 0;padding:18px;font-size:15px;line-height:1.7}.diagram-teaching-guide h4{margin:0 0 10px;font-size:16px}.diagram-teaching-guide h4 small{color:#657575;margin-left:8px;font-size:12px;display:inline-block}.diagram-teaching-guide ol{padding-left:24px}.diagram-teaching-guide li+li{margin-top:8px}.diagram-teaching-guide dt{margin-top:10px;font-weight:700}.diagram-teaching-guide dd{margin:2px 0 0}