.interval-hero-art{background:var(--green);color:#e7ead6;padding:28px;margin:30px 0;border-radius:5px;position:relative;overflow:hidden}.interval-hero-art .eyebrow{font-size:8px}.interval-hero-art svg{display:block;width:100%;height:auto;margin:12px 0}.interval-hero-art p{font-family:'Libre Caslon Display',Georgia,serif;font-size:29px;text-align:center}.interval-hero-art>span{display:block;font-size:8px;letter-spacing:1.5px;text-align:center;margin-top:12px;color:#bdcca8}.interval-controls{display:flex;flex-wrap:wrap;gap:12px 17px;align-items:end;margin-bottom:18px}.interval-controls label{display:flex;flex-direction:column;gap:8px;font-size:9px;letter-spacing:.7px;color:#596c50}.interval-controls select,.interval-controls input[type=number]{border:1px solid #bac8ac;background:#fafbf5;border-radius:3px;padding:11px 28px 11px 10px;color:var(--ink);font:inherit;font-size:12px;letter-spacing:0;min-height:40px;max-width:100%}.interval-controls select:focus-visible,.interval-controls input:focus-visible,.clock-note:focus-visible{outline:3px solid #a98434;outline-offset:4px}.interval-controls .root-select{min-width:130px}.pair-result{margin:18px 0;font-family:'Libre Caslon Display',Georgia,serif;font-size:31px;line-height:1.25;letter-spacing:-.5px}.pair-result strong{font-weight:400}.pair-result>span{color:#697e49;display:block;font-family:'DM Sans',sans-serif;font-size:12px;letter-spacing:0;margin-top:8px}.interval-metrics{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin:17px 0}.interval-metric{background:#fafbf5;border:1px solid #d5dfca;padding:14px}.interval-metric span{display:block;font-size:8px;letter-spacing:1.2px;color:var(--muted);margin-bottom:8px}.interval-metric strong{font-size:13px;font-weight:500;line-height:1.6}.interval-explanation{font-size:12px;line-height:1.9;color:#536a4a;margin-top:14px}.interval-notation svg{min-width:350px}.interval-notation{background:#fafbf5}.interval-notation .note-active ellipse{fill:#bacb77}.interval-notation .note-active .pitch-highlight{opacity:.45}.pitch-highlight{opacity:0;fill:#dce89f}.interval-audio{margin-top:18px;display:flex;align-items:center;gap:12px;flex-wrap:wrap}.interval-audio .button{padding:13px 19px;min-width:145px}.interval-audio label{font-size:10px;color:#586d4f;display:flex;align-items:center;gap:8px}.interval-audio select{font:inherit;color:var(--ink);border:1px solid #bac8ac;background:#fafbf5;padding:9px;border-radius:3px}.interval-audio .text-button{font-size:11px;text-decoration:underline;text-underline-offset:4px}.interval-speed{display:flex;align-items:center;gap:10px;color:#627557;font-size:10px;margin-top:16px}.interval-speed input{accent-color:var(--green);width:120px}.constructor-hint{font-size:12px;line-height:1.9;color:var(--muted);border:1px dashed #bac8ac;padding:18px;background:#fafbf5;border-radius:3px}.reveal-controls{display:flex;gap:12px;align-items:center;flex-wrap:wrap;margin:15px 0}.reveal-controls .button{padding:13px 19px}.reveal-controls>span{font-size:10px;line-height:1.8;color:#627557}.interval-practice-prompt{font-family:'Libre Caslon Display',Georgia,serif;font-size:28px;line-height:1.3;margin:18px 0}.interval-practice-prompt strong{font-weight:400;color:#667c45}.practice-actions{display:flex;align-items:center;gap:15px;flex-wrap:wrap;margin-top:15px}.practice-actions .button{padding:13px 18px}.practice-actions .text-button{font-size:11px;text-decoration:underline}.practice-feedback{background:#e5ecd8;border:1px solid #c4d2b3;color:#355932;font-size:12px;padding:14px 16px;line-height:1.9;margin:18px 0}.practice-feedback.incorrect{background:#eee6d7;color:#73512d;border-color:#d8c6a3}.practice-tally{font-size:9px;color:#6b7c5f;letter-spacing:.5px;line-height:1.8;margin:14px 0}.practice-form{margin-top:18px}.practice-form fieldset{padding:0;border:0;margin:0;min-width:0}.practice-form legend{font-size:12px;margin-bottom:12px}.practice-form .interval-controls{margin-bottom:0}.interval-reference{width:100%;border-collapse:collapse;font-size:11px;margin:25px 0}.interval-reference th,.interval-reference td{padding:12px 9px;text-align:left;border-bottom:1px solid var(--line);line-height:1.8}.interval-reference th{font-size:8px;letter-spacing:1px;color:var(--muted);font-weight:500}.interval-reference td:first-child{font-weight:500}.table-scroll{overflow-x:auto}.clock-layout{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:22px;align-items:center}.pitch-clock{position:relative;width:290px;height:290px;max-width:100%;margin:10px auto}.pitch-clock svg{position:absolute;inset:0;width:100%;height:100%;pointer-events:none}.clock-note{position:absolute;transform:translate(-50%,-50%);width:46px;height:36px;border:1px solid #c0cdb2;border-radius:5px;background:#fafbf5;color:var(--ink);font-size:10px;line-height:1.4;cursor:pointer;z-index:1;padding:2px}.clock-note[aria-pressed=true]{background:var(--green);border-color:var(--green);color:white}.clock-note.root-node{box-shadow:0 0 0 2px #b9c98d}.clock-center{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);text-align:center;pointer-events:none;color:var(--ink);background:#edf0e5;border-radius:50%;height:84px;width:84px;display:grid;align-content:center;font-family:'Libre Caslon Display',serif;font-size:29px}.clock-center small{display:block;font-family:'DM Sans',sans-serif;font-size:7px;letter-spacing:1px;margin-top:5px}.geometry-description{font-size:11px;line-height:1.9;color:var(--muted)}.geometry-controls label{font-size:10px;display:flex;flex-direction:column;gap:8px;margin:14px 0;color:#52694b}.geometry-controls input[type=range]{accent-color:var(--green);width:100%}.geometry-controls select{font:inherit;font-size:12px;border:1px solid #bac8ac;background:#fafbf5;padding:11px;border-radius:3px;color:var(--ink)}.geometry-count{font-family:'Libre Caslon Display',serif;font-size:32px;color:var(--ink)}.octave-note{font-size:11px;color:#667b4c;line-height:1.9;margin-top:14px;padding-top:12px;border-top:1px solid #ced9c1}.lab-tabs button:focus-visible,.explorer-notes button:focus-visible{outline:3px solid #a98434;outline-offset:3px}.interval-score-caption{font-size:10px;line-height:1.8;color:#637656;margin-top:9px}.interval-intro-links{display:flex;gap:22px;flex-wrap:wrap;margin-top:22px;font-size:11px;color:#5f714e}.interval-intro-links a{text-decoration:underline;text-underline-offset:4px}.interval-progress-note{font-size:10px;margin-top:18px;color:var(--muted);line-height:1.8}.interval-exercise-divider{border-top:1px solid #d0d9c3;margin:20px 0 15px}.lesson-main .interval-last-check{font-size:12px;line-height:1.9;color:var(--muted);margin-top:15px}
@media(max-width:1050px){.clock-layout{grid-template-columns:1fr}.pitch-clock{width:290px;height:290px}.geometry-controls{max-width:440px;width:100%;margin:auto}}@media(max-width:760px){.interval-hero-art{padding:22px}.interval-hero-art p{font-size:25px}.interval-controls{gap:12px}.interval-controls label{font-size:9px;flex:1 1 100px;min-width:0}.interval-controls select{width:100%;font-size:12px;min-width:0}.interval-controls .root-select{min-width:0}.pair-result{font-size:28px}.interval-metric{padding:12px}.interval-metric strong{font-size:12px}.interval-metric span{font-size:7px}.interval-notation svg{min-width:350px}.interval-audio{gap:12px}.interval-audio label{font-size:9px}.interval-practice-prompt{font-size:26px}.pitch-clock{width:270px;height:270px}.clock-note{width:43px;height:34px;font-size:9px}.interval-speed{flex-wrap:wrap}.interval-reference{font-size:10px}.clock-layout{gap:10px}.geometry-count{font-size:29px}.geometry-description{font-size:11px}}