:root{--ink:#233c37;--muted:#78837b;--green:#17685e;--deep:#164d47;--mint:#e4eee7;--cream:#f6f4ee;--paper:#fffefa;--line:#e4e6dc;--orange:#c9855e;--soft:#f2ece1;--shadow:0 5px 25px #283f3307;font-family:"IBM Plex Sans Arabic",Tahoma,Arial,sans-serif;color:var(--ink);background:var(--cream);font-synthesis:none}
*{box-sizing:border-box}body{margin:0}button,input,select,textarea{font:inherit}button,a,input,select,textarea{-webkit-tap-highlight-color:transparent}button{cursor:pointer;color:inherit}a{color:inherit;text-decoration:none}button{border:0;background:none}img{max-width:100%}h1,h2,h3,p{margin:0}h1{font-size:32px;line-height:1.6;font-weight:600;letter-spacing:-.8px}h1 em{font-style:normal;color:var(--green)}h2{font-size:16px;font-weight:600}h3{font-size:19px;font-weight:600}p{line-height:1.85}button:disabled{opacity:.45;cursor:not-allowed}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid #d4a05c;outline-offset:3px}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}[hidden]{display:none!important}.skip-link{position:fixed;top:-80px;right:20px;z-index:100;background:var(--deep);color:white;padding:10px 20px;border-radius:8px}.skip-link:focus{top:8px}.icon{width:19px;height:19px;display:inline-block;flex-shrink:0;vertical-align:middle;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.site-header{height:91px;display:flex;align-items:center;justify-content:space-between;padding:0 36px;gap:24px;background:var(--paper);border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:11px;min-width:170px;font-size:27px;font-weight:600;line-height:1.1}.brand small{display:block;font-size:10px;font-weight:400;color:var(--muted);margin-top:8px;letter-spacing:.5px}.primary-nav{display:flex;gap:7px;align-self:stretch;align-items:center}.nav-item{display:flex;align-items:center;gap:8px;height:43px;padding:0 17px;font-size:13px;white-space:nowrap;border-radius:9px;color:#7b8279;transition:background .2s}.nav-item.active{background:var(--mint);color:var(--deep);font-weight:500}.nav-item:hover{background:#f0f2eb}.header-actions{display:flex;align-items:center;gap:14px}.connection{font-size:11px;color:var(--muted);white-space:nowrap;display:flex;align-items:center;gap:6px}.connection>span{width:6px;height:6px;background:#609a73;border-radius:50%}.connection.offline>span{background:#c99553}.button{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:43px;padding:10px 20px;border-radius:9px;font-weight:500;font-size:13px;transition:background .15s,transform .15s}.button:hover{transform:translateY(-1px)}.button.primary{background:var(--deep);color:#fff}.button.primary:hover{background:#20665c}.button.outline{border:1px solid #d9dfd3;background:var(--paper)}.button.outline:hover,.button[aria-pressed=true]{background:var(--mint)}.button.small{min-height:35px;font-size:12px;padding:7px 12px}.icon-button{width:34px;height:34px;border-radius:8px;display:inline-flex;align-items:center;justify-content:center;flex-shrink:0}.icon-button:hover,.icon-button.active{background:var(--mint);color:var(--green)}.text-button{display:inline-flex;align-items:center;gap:9px;color:var(--green);font-size:13px;padding:8px 0}.text-button:hover{text-decoration:underline}.danger{color:#a65346}.button-row{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.centered{justify-content:center}
.app-shell{max-width:1660px;margin:auto;padding:30px 32px 0}.lab-topline{display:flex;align-items:center;justify-content:space-between;margin:0 0 25px}.eyebrow{font-size:11px;color:var(--green);font-weight:500;display:flex;align-items:center;gap:8px;margin-bottom:7px}.tiny-line{height:1px;width:20px;background:var(--orange)}.subheading{font-size:13px;color:var(--muted);margin-top:5px}.intro-stats{display:flex;align-items:center;gap:28px;padding-left:15px}.intro-stats>div{display:flex;flex-direction:column;gap:2px}.intro-stats strong{font-size:27px;font-weight:500;color:var(--deep);line-height:1.4}.intro-stats span{font-size:11px;color:var(--muted)}.stat-divider{height:35px;width:1px;background:var(--line)}.card{background:var(--paper);border:1px solid var(--line);border-radius:15px;box-shadow:var(--shadow)}.lab-grid{display:grid;grid-template-columns:221px minmax(0,1fr)260px;gap:16px;align-items:start}.lab-grid>*{min-width:0}.letter-sidebar{padding:20px 15px;min-height:640px}.section-top{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:17px}.section-top h2{display:flex;align-items:center;gap:9px}.count-pill{background:#f1f2eb;color:var(--muted);border-radius:6px;min-width:25px;font-size:11px;text-align:center;padding:2px 5px}.search-field{display:flex;align-items:center;gap:7px;border:1px solid var(--line);background:#f9f9f4;border-radius:8px;padding:8px 9px}.search-field .icon{width:15px;color:#939a90}.search-field input{width:100%;background:none;border:0;outline:none;font-size:11px;color:var(--ink);min-width:0}.region-tabs{display:flex;flex-wrap:wrap;gap:5px;margin:15px 0}.region-tabs button{font-size:10px;padding:5px 8px;border:1px solid transparent;border-radius:6px;color:var(--muted)}.region-tabs button.active{color:var(--green);border-color:#c8ddcf;background:#edf4ed}.letter-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:7px}.letter-btn{aspect-ratio:1;border:1px solid var(--line);background:#fafaf5;border-radius:8px;font-size:24px;font-family:"Amiri Quran","IBM Plex Sans Arabic",serif;line-height:1.4;position:relative;transition:background .18s,border-color .18s,transform .18s}.letter-btn:hover{border-color:#9bb6a4;transform:translateY(-2px)}.letter-btn.active{background:var(--deep);border-color:var(--deep);color:#fff;box-shadow:0 3px 8px #164d471c}.letter-btn.saved:after{content:"";position:absolute;width:4px;height:4px;border-radius:100%;background:var(--orange);bottom:4px;left:5px}.sidebar-note{display:flex;gap:8px;border-top:1px solid var(--line);padding-top:18px;margin-top:22px}.sidebar-note .icon{color:var(--orange);width:17px;margin-top:4px}.sidebar-note p{font-size:10px;color:var(--muted);line-height:1.9}.muted{color:var(--muted);font-size:12px}
.laboratory{overflow:hidden}.stage-toolbar{padding:13px 16px;display:flex;align-items:center;justify-content:space-between;gap:8px;border-bottom:1px solid var(--line)}.view-buttons{display:flex;gap:3px;background:#f1f3eb;padding:3px;border-radius:8px}.view-buttons button{font-size:11px;padding:5px 11px;border-radius:6px;color:var(--muted)}.view-buttons button.active{background:white;box-shadow:0 1px 4px #0000000a;color:var(--deep)}.stage{position:relative;background:#f0f0e7;overflow:hidden;background-image:radial-gradient(#bfc7b14d .6px,transparent .6px);background-size:20px 20px}.viewports{display:grid;grid-template-columns:1fr}.viewports.comparing{grid-template-columns:1fr 1fr}.scene-wrap{position:relative;min-width:0}.viewports.comparing .scene-wrap+.scene-wrap{border-right:1px solid #dce1d3}.scene-container{height:424px;position:relative;overflow:hidden}.scene-container canvas{width:100%;height:100%;display:block;touch-action:none;outline-offset:-4px}.sound-tag{position:absolute;right:19px;top:15px;display:flex;align-items:center;gap:10px;pointer-events:none}.sound-tag>span{font-family:"Amiri Quran",serif;font-size:46px;color:var(--deep);line-height:1.3}.sound-tag b{display:block;font-size:12px}.sound-tag small{display:block;color:#8a9285;font-size:10px;margin-top:3px}.stage-guide{position:absolute;bottom:18px;right:18px;display:flex;align-items:center;gap:6px;font-size:9px;color:#8a9587;pointer-events:none}.stage-guide .icon{width:13px;height:13px}.model-note{position:absolute;bottom:19px;left:15px;font-size:8px;color:#899181;pointer-events:none}.model-loading,.model-error{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:13px;z-index:2;background:#f1f1e9e8;padding:25px;text-align:center;font-size:12px;color:var(--muted)}.model-loading .spinner{height:24px;width:24px;border:2px solid #c9d4c1;border-top-color:var(--green);border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.model-error strong{color:var(--ink)}.anatomy-label{position:absolute;pointer-events:none;font-size:9px;background:#fffefaeb;color:#627568;padding:3px 7px;border:1px solid #dce3d3;border-radius:5px;white-space:nowrap;transform:translate(-50%,-50%);box-shadow:0 1px 7px #32452b05}.anatomy-label:before{content:"";position:absolute;right:50%;bottom:-6px;width:1px;height:5px;background:#809279}.layer-controls{padding:11px 16px;display:flex;align-items:center;justify-content:center;gap:15px;border-bottom:1px solid var(--line);flex-wrap:wrap}.layer-controls button{font-size:10px;display:flex;align-items:center;gap:5px;color:#92998b;padding:3px 0}.layer-controls .icon{height:14px;width:14px}.layer-controls button.active{color:var(--green)}.context-row{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:12px 17px;border-bottom:1px solid var(--line)}.context-row>span{font-size:10px;color:var(--muted)}.context-buttons{display:flex;gap:4px}.context-buttons button{font-size:10px;border:1px solid transparent;padding:4px 9px;border-radius:6px;color:var(--muted)}.context-buttons button.active{background:#edf3eb;border-color:#d5e1d0;color:var(--green)}.playback{display:flex;align-items:center;gap:12px;padding:16px 18px}.play-button{height:39px;width:39px;border-radius:50%;background:var(--deep);color:white;display:flex;align-items:center;justify-content:center;flex-shrink:0}.play-button:hover{background:#267465}.play-button .icon{width:17px;height:17px}.timeline{flex:1;min-width:0}.timeline>div{display:flex;justify-content:space-between;font-size:9px;color:var(--muted);gap:5px}.timeline input{display:block;width:100%;height:3px;accent-color:var(--green);margin:12px 0 3px;cursor:pointer;direction:ltr}.speed-control select{background:none;border:0;color:var(--green);font-size:11px;direction:ltr;max-width:65px}.compare-selectors{display:flex;align-items:center;justify-content:space-around;gap:15px;padding:9px 16px;border-bottom:1px solid var(--line);font-size:10px;color:var(--muted)}.compare-selectors label{display:flex;align-items:center;gap:6px}.compare-selectors select{border:1px solid var(--line);background:var(--paper);border-radius:6px;padding:4px;color:var(--ink);font-size:12px}.compare-selectors>span{font-size:9px}
.detail-sidebar{padding:19px 18px;min-height:640px}.detail-heading{display:flex;align-items:start;justify-content:space-between;margin-bottom:9px}.detail-char{font-size:65px;line-height:1.35;font-family:"Amiri Quran",serif;color:var(--deep)}.detail-heading h2{font-size:17px;margin-top:4px}.review-label{font-size:8px;display:inline-flex;align-items:center;gap:4px;margin-top:8px;color:#a18b66;background:#f6f0e3;padding:3px 6px;border-radius:5px}.review-label:before{content:"";width:4px;height:4px;background:#ba9a62;border-radius:50%}.detail-region{font-size:10px;color:var(--green);margin-top:6px}.detail-block{border-top:1px solid var(--line);padding-top:15px;margin-top:15px}.detail-block h3{font-size:11px;color:#8b9588;margin-bottom:7px;font-weight:400}.detail-block p{font-size:12px;line-height:1.9}.trait-list{display:flex;flex-wrap:wrap;gap:5px}.trait{font-size:9px;background:#f1f3eb;color:#68795f;padding:4px 7px;border-radius:5px}.teaching-tip{font-size:11px!important;background:#f2f5ec;border-radius:8px;padding:10px;color:#68765e}.teaching-tip .icon{width:14px;color:var(--green);margin-left:3px}.caution{margin-top:12px;font-size:10px}.caution summary{cursor:pointer;color:#9a8c73;line-height:1.8}.caution p{font-size:10px;margin-top:6px;color:#7e8174}.example-card{display:flex;align-items:center;justify-content:space-between;background:#f7f5ee;border-radius:10px;padding:10px;margin-top:17px;gap:8px}.example-word{font-family:"Amiri Quran",serif;font-size:27px;line-height:1.9}.example-card small{display:block;font-size:8px;color:var(--muted)}.example-card button{background:white;color:var(--green);height:33px;width:33px;border:1px solid var(--line);border-radius:50%;display:flex;align-items:center;justify-content:center;flex-shrink:0}.example-card button:hover{background:var(--mint)}.detail-actions{display:flex;justify-content:space-between;margin-top:11px;font-size:10px}.detail-actions button{font-size:10px}.letter-note{width:100%;min-height:67px;resize:vertical;border:1px solid var(--line);background:#fafaf4;border-radius:7px;padding:9px;font-size:10px;margin-top:8px;line-height:1.8;color:var(--ink)}.note-label{font-size:9px;color:var(--muted)}.lab-bottom{display:flex;justify-content:space-between;align-items:center;padding:20px 10px;gap:20px}.lab-bottom>div{display:flex;align-items:center;gap:10px;max-width:830px}.lab-bottom .icon{color:var(--orange);width:23px;height:23px}.lab-bottom p{font-size:11px;color:var(--muted)}.lab-bottom p b{color:var(--ink);font-weight:500}
.teacher-tools{display:flex;justify-content:space-between;align-items:center;padding:12px 16px;border-radius:12px;background:#e7eee3;margin-bottom:15px;gap:12px}.teacher-tools>div:first-child{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--green)}.teacher-tools span{font-size:10px;color:var(--muted)}#annotation{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;z-index:4;touch-action:none}#annotation.drawing{pointer-events:auto;cursor:crosshair}.teacher-mode .lab-topline{display:none}.teacher-mode .app-shell{padding-top:18px}.teacher-mode .lab-grid{grid-template-columns:190px minmax(0,1fr)240px}.teacher-mode .scene-container{height:calc(100vh - 355px);min-height:380px}.teacher-mode .letter-sidebar,.teacher-mode .detail-sidebar{min-height:0}
.page-intro{margin:8px 0 28px}.lesson-progress{padding:20px 24px;display:flex;align-items:center;gap:30px;margin-bottom:22px}.lesson-progress>div:first-child{flex:1}.lesson-progress b{font-size:14px}.lesson-progress p{font-size:11px;color:var(--muted);margin-top:5px}.progress-track{background:#e9ede3;height:6px;width:220px;border-radius:5px;overflow:hidden}.progress-track>span{display:block;height:100%;width:0;background:var(--green);border-radius:5px;transition:width .3s}.lesson-progress>span{font-size:12px;color:var(--muted);white-space:nowrap}.lesson-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.lesson-card{padding:25px;display:flex;flex-direction:column;min-height:285px;position:relative;overflow:hidden}.lesson-card:before{content:"";position:absolute;left:-35px;top:-35px;height:130px;width:130px;border:1px solid color-mix(in srgb,var(--lesson-color) 12%,transparent);border-radius:50%}.lesson-card .lesson-symbol{width:47px;height:47px;display:flex;align-items:center;justify-content:center;border-radius:12px;background:color-mix(in srgb,var(--lesson-color) 10%,white);color:var(--lesson-color);font-family:"Amiri Quran",serif;font-size:28px;margin-bottom:21px}.lesson-card h2{font-size:18px}.lesson-card p{font-size:12px;color:var(--muted);margin-top:8px}.lesson-card .lesson-bottom{display:flex;align-items:center;justify-content:space-between;margin-top:auto;padding-top:20px}.lesson-card .lesson-bottom>span{font-size:10px;color:var(--muted)}.lesson-card.completed{border-color:#acc6af}.completed-badge{position:absolute;left:22px;top:25px;color:var(--green);font-size:10px}.lesson-letters{display:flex;gap:7px;flex-wrap:wrap;margin:22px 0}.lesson-letters button{min-width:42px;height:45px;font-family:"Amiri Quran",serif;font-size:24px;border:1px solid var(--line);border-radius:8px;background:#f4f6ee}.help-steps{padding-right:20px;margin:20px 0;font-size:13px;line-height:2}.help-steps li{margin:10px 0;padding-right:5px}.lesson-step{display:flex;align-items:start;gap:10px;margin:15px 0;font-size:13px}.lesson-step>span{background:var(--mint);color:var(--green);width:24px;height:24px;display:flex;align-items:center;justify-content:center;flex-shrink:0;border-radius:50%;font-size:11px}
.practice-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-bottom:20px}.practice-stat{padding:20px 23px;display:flex;align-items:center;gap:15px}.practice-stat>.icon{color:var(--green);width:25px;height:25px;background:#edf2e8;padding:8px;box-sizing:content-box;border-radius:12px}.practice-stat strong{font-size:25px;font-weight:500;line-height:1.4}.practice-stat span{display:block;color:var(--muted);font-size:11px}.practice-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}.practice-card{padding:25px;min-width:0}.practice-card>p{font-size:12px;color:var(--muted)}.subtle-pill{font-size:9px;padding:4px 7px;background:#f2f4ec;border-radius:5px;color:var(--muted)}.field-label{display:flex;align-items:center;gap:12px;margin-top:19px;font-size:11px;color:var(--muted)}.field-label select{flex:1;max-width:200px;border:1px solid var(--line);background:#fbfbf6;border-radius:6px;padding:6px 9px;font-size:12px;color:var(--ink)}.record-target{text-align:center;font-family:"Amiri Quran",serif;font-size:66px;color:var(--deep);line-height:1.6;margin:9px 0 0}.record-wave{height:34px;display:flex;align-items:center;justify-content:center;gap:5px}.record-wave span{width:4px;height:7px;border-radius:3px;background:#cedbcb}.record-wave.recording span{animation:wave .8s ease-in-out infinite alternate;background:var(--orange)}.record-wave span:nth-child(3n){animation-delay:.3s}.record-wave span:nth-child(2n){animation-delay:.6s}@keyframes wave{to{height:27px}}.record-status{text-align:center;font-size:11px!important;min-height:35px;margin:12px 0!important}.record-status.error{color:#ab6252}.fine-print{font-size:10px!important;line-height:1.9;color:#90968a!important;margin-top:18px!important}#record-audio{width:100%;height:36px;margin-top:17px}#record-result .text-button{font-size:11px}.quiz-intro{padding:30px 10px;text-align:center}.quiz-intro .quiz-ornament{font-family:"Amiri Quran",serif;font-size:61px;line-height:1.3;color:var(--green);display:block;margin:0 0 20px}.quiz-intro h3{margin-bottom:10px}.quiz-intro p{font-size:12px;color:var(--muted);margin:0 auto 23px;max-width:350px}.quiz-meta{display:flex;justify-content:space-between;align-items:center;margin:25px 0 17px;font-size:11px;color:var(--muted)}.quiz-question{font-size:19px;line-height:1.9;margin-bottom:18px;min-height:60px}.answer-grid{display:grid;gap:8px}.answer-btn{text-align:right;display:flex;align-items:center;gap:10px;padding:11px 13px;border:1px solid var(--line);border-radius:8px;background:#fafbf6;font-size:12px}.answer-btn>span{display:flex;align-items:center;justify-content:center;width:23px;height:23px;flex-shrink:0;border:1px solid var(--line);border-radius:50%;font-size:10px;color:var(--muted)}.answer-btn:hover:not(:disabled){border-color:#a5bf9f;background:#f1f6ec}.answer-btn.correct{border-color:#90b49c;background:#edf6eb;color:var(--green)}.answer-btn.wrong{border-color:#cda99a;background:#fbf0e9;color:#9b5e4e}.quiz-feedback{margin-top:16px;padding:13px;background:#f1f5eb;border-radius:9px;font-size:12px;line-height:1.9}.quiz-next{margin-top:15px}.quiz-result-number{font-size:60px;color:var(--green);font-weight:500;line-height:1.5}.quiz-results{padding:25px 15px;text-align:center}.quiz-results p{font-size:12px;color:var(--muted);margin:14px 0}.lower-practice{margin-top:20px}.bookmark-list{display:flex;flex-wrap:wrap;gap:9px;min-height:50px}.bookmark-list>p{font-size:12px;color:var(--muted)}.bookmark-chip{display:flex;align-items:center;gap:9px;background:#f4f6ee;border:1px solid var(--line);padding:5px 11px;border-radius:8px;font-size:11px}.bookmark-chip b{font-family:"Amiri Quran",serif;font-size:24px;font-weight:400}.file-button{cursor:pointer}
.site-footer{max-width:1660px;padding:31px 35px 25px;margin:14px auto 0;display:flex;align-items:center;justify-content:space-between;border-top:1px solid var(--line);gap:15px}.footer-brand{font-size:20px;font-weight:500}.footer-brand span{color:var(--muted);font-size:10px;font-weight:400;margin-right:10px}.site-footer>div{display:flex;align-items:center;gap:22px;font-size:10px;color:var(--muted)}.site-footer a:hover{color:var(--green)}dialog{border:1px solid var(--line);border-radius:19px;background:var(--paper);color:var(--ink);max-width:570px;width:calc(100% - 35px);padding:32px;box-shadow:0 20px 90px #143d3a22}dialog::backdrop{background:#15392f66;backdrop-filter:blur(4px)}dialog h2{font-size:24px;line-height:1.7}dialog p{font-size:13px}dialog .dialog-close{position:absolute;left:15px;top:15px}.notice{font-size:11px!important;background:#f7f1e6;padding:13px;border-radius:9px;color:#8d7b5c;margin:18px 0}.toast{position:fixed;bottom:25px;left:50%;transform:translateX(-50%);z-index:100;max-width:calc(100% - 35px);padding:13px 24px;background:var(--deep);color:white;border-radius:10px;box-shadow:0 6px 25px #163b3325;font-size:12px;text-align:center}.credits-page{max-width:860px;margin:auto;padding:50px 24px}.credits-page h1{margin:15px 0}.credits-page h2{font-size:19px;margin:30px 0 10px}.credits-page p,.credits-page li{font-size:14px;line-height:2}.credits-page a{color:var(--green);text-decoration:underline}.credits-page .card{padding:28px;margin-top:20px}.credits-page ul{padding-right:20px}
@media(min-width:1600px){.scene-container{height:484px}.letter-sidebar,.detail-sidebar{min-height:700px}}
@media(max-width:1240px){.site-header{padding:0 22px;gap:14px}.nav-item{padding:0 11px;font-size:12px}.header-actions{gap:8px}.connection{display:none}.lab-grid{grid-template-columns:195px minmax(0,1fr)235px;gap:12px}.app-shell{padding:24px 20px 0}.detail-sidebar{padding:16px 14px}.letter-sidebar{padding:18px 12px}.letter-grid{gap:5px}.layer-controls{gap:10px}.view-buttons button{padding:5px 8px}.stage-toolbar{padding:12px}.stage-toolbar .button{font-size:10px}.context-buttons button{padding:4px 7px}.model-note{font-size:7px;left:10px}.stage-guide{font-size:8px;right:10px}.intro-stats{gap:20px}.scene-container{height:415px}}
@media(max-width:1050px){.lab-grid{grid-template-columns:205px minmax(0,1fr)}.detail-sidebar{grid-column:1/-1;display:grid;grid-template-columns:1fr 1.3fr 1fr;gap:0 23px;min-height:0}.detail-sidebar .detail-heading{grid-row:1/3}.detail-sidebar>.detail-region{grid-column:1;grid-row:3}.detail-sidebar .detail-block{margin:0;padding:0 0 12px;border-top:0}.detail-sidebar .example-card{margin:0;align-self:start}.detail-sidebar .detail-actions{grid-column:3}.detail-sidebar .note-section{grid-column:2/4}.letter-sidebar{min-height:630px}.scene-container{height:415px}.teacher-mode .lab-grid{grid-template-columns:180px minmax(0,1fr)}.teacher-mode .detail-sidebar{display:none}.primary-nav{gap:1px}.brand{min-width:145px}.header-actions .button span{display:none}.header-actions .button{padding:8px}.lesson-grid{grid-template-columns:repeat(2,1fr)}.lesson-progress{gap:18px}.progress-track{width:150px}.intro-stats{padding:0}.lab-bottom .text-button{white-space:nowrap;font-size:11px}.site-footer{padding:25px 22px}}
@media(max-width:700px){h1{font-size:25px}.site-header{height:auto;padding:15px 16px 0;flex-wrap:wrap;gap:13px}.brand{font-size:25px;flex:1}.brand img{width:35px;height:35px}.brand small{font-size:9px;margin-top:6px}.header-actions{gap:4px}.primary-nav{order:3;width:100%;padding:4px 0 10px;justify-content:space-between}.nav-item{flex:1;justify-content:center;font-size:11px;padding:0 7px;height:39px}.nav-item .icon{width:16px}.app-shell{padding:21px 13px 0}.lab-topline{margin-bottom:18px}.intro-stats{display:none}.subheading{font-size:11px;line-height:1.9}.eyebrow{font-size:10px}.lab-grid,.teacher-mode .lab-grid{display:flex;flex-direction:column;gap:13px}.laboratory{order:0;width:100%}.letter-sidebar{order:1;width:100%;min-height:0;padding:17px}.detail-sidebar{order:2;width:100%;display:block;padding:20px}.detail-sidebar .detail-heading{float:right;width:45%;padding-left:12px}.detail-sidebar>.detail-region{padding-top:5px}.detail-sidebar .detail-block{border-top:1px solid var(--line);padding-top:12px;margin-top:12px}.detail-sidebar .detail-block:first-of-type{border-top:0}.detail-sidebar .example-card{clear:both;margin-top:15px}.detail-sidebar .note-section{clear:both}.detail-char{font-size:56px}.detail-block p{font-size:12px}.detail-sidebar .detail-actions{margin:10px 0}.letter-grid{grid-template-columns:repeat(8,1fr);gap:8px}.letter-btn{font-size:26px;max-height:53px}.region-tabs{gap:5px}.region-tabs button{font-size:11px;padding:5px 10px}.sidebar-note{display:none}.scene-container{height:365px}.stage-toolbar{padding:10px;gap:5px}.stage-toolbar .button{font-size:10px;padding:6px 9px}.view-buttons button{font-size:10px;padding:5px 9px}.button.small{font-size:11px}.layer-controls{padding:11px 8px;gap:14px}.layer-controls button{font-size:9px}.model-note{bottom:10px;left:10px;font-size:7px}.stage-guide{bottom:27px;right:11px;font-size:8px}.sound-tag{right:15px;top:10px}.sound-tag>span{font-size:39px}.sound-tag b{font-size:10px}.sound-tag small{font-size:9px}.context-row{padding:11px 12px}.context-buttons{gap:1px}.context-buttons button{padding:4px 7px;font-size:10px}.playback{gap:10px;padding:15px 13px}.timeline>div{font-size:8px}.playback .icon-button{width:27px}.timeline input{height:4px}.speed-control select{font-size:10px}.compare-selectors{gap:5px;padding:8px}.compare-selectors label{font-size:9px}.compare-selectors select{max-width:96px;font-size:11px}.compare-selectors>span{display:none}.viewports.comparing .scene-container{height:330px}.viewports.comparing .anatomy-label{font-size:7px;padding:2px 4px}.lab-bottom{align-items:start;padding:16px 5px;flex-direction:column;gap:3px}.lab-bottom p{font-size:10px}.lab-bottom>.text-button{align-self:flex-end}.teacher-tools{padding:10px;gap:8px;flex-wrap:wrap}.teacher-tools span{display:none}.teacher-tools>div:first-child{font-size:12px}.teacher-mode .scene-container{height:400px;min-height:0}.teacher-mode .letter-sidebar{display:none}.teacher-mode .viewports.comparing .scene-container{height:400px}.teacher-mode .primary-nav{display:none}.teacher-mode .site-header{padding-bottom:12px}.teacher-mode .app-shell{padding-top:12px}.teacher-tools .button-row{gap:5px}.lesson-grid{grid-template-columns:1fr}.lesson-card{min-height:240px;padding:23px}.page-intro{margin:0 0 21px}.lesson-progress{padding:17px;flex-wrap:wrap;gap:14px}.lesson-progress>div:first-child{flex-basis:100%}.progress-track{flex:1}.practice-stats{gap:8px}.practice-stat{padding:14px 9px;display:block;text-align:center}.practice-stat>.icon{width:18px;height:18px;padding:6px;margin-bottom:7px}.practice-stat strong{font-size:23px}.practice-stat span{font-size:9px}.practice-grid{grid-template-columns:1fr;gap:13px}.practice-card{padding:21px}.lower-practice{margin-top:13px}.site-footer{align-items:start;flex-direction:column;padding:23px 19px;gap:15px}.site-footer>div{flex-wrap:wrap;gap:15px;font-size:9px}.site-footer .footer-brand span{font-size:9px}dialog{padding:27px 23px}dialog h2{font-size:21px}.quiz-question{font-size:18px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:.01ms!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}
@media print{.site-header,.letter-sidebar,.stage-toolbar,.playback,.context-row,.teacher-tools,.layer-controls,.site-footer,.lab-bottom,.detail-actions,.note-section{display:none!important}.lab-grid{display:block}.laboratory{width:100%;break-inside:avoid}.detail-sidebar{display:block;border:0}.stage{background:white}.app-shell{padding:0}}

.compare-insights{display:grid;grid-template-columns:1fr 1fr;gap:15px;padding:12px 18px;border-bottom:1px solid var(--line)}.compare-insights b{font-size:11px;color:var(--green)}.compare-insights p{font-size:10px;color:var(--muted);line-height:1.8;margin-top:3px}.primary-nav .nav-item{font-weight:500}

.letter-btn{min-width:0;padding:0}
@media(max-width:700px){.letter-grid{grid-template-columns:repeat(7,minmax(0,1fr))}.letter-btn{min-height:44px;font-size:24px;aspect-ratio:auto}}
@media(max-width:380px){.letter-grid{grid-template-columns:repeat(6,minmax(0,1fr))}}

/* Center isolated letter ink independently of Quran font ascenders. */
.letter-btn{display:grid;place-items:center;overflow:hidden}
.letter-glyph{display:block;line-height:1;pointer-events:none}