*{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent;-webkit-text-size-adjust:100%;-ms-text-size-adjust:100%;text-size-adjust:100%}body,html{width:100%;height:100%;overflow-x:hidden;touch-action:manipulation;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none}body{font-family:'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;background:#0a0a0f;color:#fff;line-height:1.6;position:fixed;width:100%;height:100%;overflow:hidden}.container{display:flex;flex-direction:column;height:100vh;max-width:100%;margin:0 auto;background:linear-gradient(180deg,#1a1a2e 0,#0f0f1a 100%);position:relative}.header{display:flex;justify-content:space-between;align-items:center;padding:10px 16px;background:rgba(0,0,0,.4);border-bottom:1px solid rgba(255,255,255,.1);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);flex-shrink:0}.logo{display:flex;align-items:center;gap:8px}.logo-image{width:30px;height:30px;object-fit:contain;border-radius:50%;background:linear-gradient(135deg,#1a1a2e 0,#16213e 30%,#1a1a2e 70%,#0f3460 100%);padding:5px;box-shadow:0 3px 10px rgba(0,0,0,.4),inset 0 0 10px rgba(77,204,189,.3);border:2px solid #4dccbd;transition:all .3s ease;position:relative}.logo-image::before{content:'';position:absolute;top:-3px;left:-3px;right:-3px;bottom:-3px;border-radius:50%;background:linear-gradient(135deg,rgba(77,204,189,.2) 0,rgba(106,103,206,.2) 50%,rgba(77,204,189,.2) 100%);z-index:-1;opacity:0;transition:opacity .3s ease}.logo-image:hover::before{opacity:1}.logo-image:hover{transform:scale(1.08);box-shadow:0 4px 15px rgba(0,0,0,.5),inset 0 0 15px rgba(77,204,189,.5);border:2px solid #6a67ce}.logo-text{font-size:16px;font-weight:600;color:#fff;letter-spacing:.5px;text-shadow:0 1px 3px rgba(0,0,0,.3)}.logo-text .highlight{color:#4dccbd;font-weight:700}@media (max-width:768px){.logo-image{width:26px;height:26px;padding:4px;border:1.5px solid #4dccbd}.logo-text{font-size:14px}}.logo i{font-size:20px;color:#4dccbd}.logo h1{font-size:18px;font-weight:600;color:#fff}.logo .highlight{color:#4dccbd}.header-status{display:flex;align-items:center;gap:12px}.status-indicator{display:flex;align-items:center;gap:4px}.status-dot{width:6px;height:6px;border-radius:50%;background:#4caf50;animation:pulse 2s infinite}@keyframes pulse{0%{opacity:1}50%{opacity:.5}100%{opacity:1}}.status-dot.inactive{background:#ff4757;animation:none}.status-dot.listening{background:#ffa502;animation:pulse .5s infinite}#statusText{font-size:10px;color:#a0e7e5}.tuner-main{flex:1;display:flex;flex-direction:column;padding:12px 16px;overflow-y:auto;-webkit-overflow-scrolling:touch;min-height:0}.digital-display{background:rgba(0,0,0,.3);border-radius:12px;padding:12px;margin-bottom:8px;border:1px solid rgba(255,255,255,.05);box-shadow:0 4px 16px rgba(0,0,0,.3);flex-shrink:0}.display-container{display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px}.cent-display-section,.frequency-display-section,.note-display-section{text-align:center;padding:10px;background:rgba(0,0,0,.2);border-radius:8px;border:1px solid rgba(255,255,255,.05);flex:1;min-width:100px}.cent-label,.frequency-label,.note-label{font-size:9px;text-transform:uppercase;letter-spacing:.5px;color:#a0e7e5;margin-bottom:4px;font-weight:600}.note-display{font-size:32px;font-weight:700;margin:6px 0;color:#ff9a76;text-shadow:0 0 10px rgba(255,154,118,.3);display:flex;justify-content:center;align-items:baseline;gap:3px}.note-letter{font-size:40px}.note-octave{font-size:18px;color:#a0e7e5}.note-name{font-size:11px;color:#a0e7e5}.frequency-display{font-size:24px;font-weight:700;margin:6px 0;color:#4dccbd;text-shadow:0 0 8px rgba(77,204,189,.3);display:flex;justify-content:center;align-items:baseline;gap:3px}.frequency-value{font-size:28px}.frequency-unit{font-size:14px;color:#a0e7e5}.frequency-name{font-size:11px;color:#a0e7e5}.cent-display{font-size:24px;font-weight:700;margin:6px 0;color:#fff;text-shadow:0 0 8px rgba(255,255,255,.3);display:flex;justify-content:center;align-items:baseline;gap:3px}.cent-value{font-size:28px}.cent-unit{font-size:14px;color:#a0e7e5}.cent-name{font-size:11px;font-weight:600;text-transform:uppercase}.cent-display-section.flat .cent-display{color:#2196f3}.cent-display-section.sharp .cent-display{color:#ff9800}.cent-display-section.perfect .cent-display{color:#4caf50}.visual-tuner{background:rgba(0,0,0,.3);border-radius:12px;padding:12px;margin-bottom:8px;border:1px solid rgba(255,255,255,.05);flex-shrink:0}.section-title{font-size:12px;font-weight:600;color:#a0e7e5;margin-bottom:10px;display:flex;align-items:center;gap:6px}.tuner-scale{position:relative}.scale-numbers{display:flex;justify-content:space-between;margin-bottom:6px;padding:0 3px}.scale-numbers span{font-size:9px;color:#a0a0a0;font-weight:500}.scale-bar{position:relative;height:30px;background:rgba(0,0,0,.4);border-radius:15px;overflow:hidden;border:1px solid rgba(255,255,255,.1)}.scale-background{position:absolute;top:0;left:0;width:100%;height:100%;background:linear-gradient(90deg,#2196f3 0,#2196f3 40%,#4caf50 45%,#4caf50 55%,#ff9800 60%,#ff9800 100%);opacity:.2}.scale-indicator{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:3px;height:70%;background:#fff;border-radius:2px;box-shadow:0 0 6px rgba(255,255,255,.5);transition:left .2s ease;z-index:2}.scale-center{position:absolute;top:0;left:50%;transform:translateX(-50%);width:2px;height:100%;background:#fff;opacity:.5;z-index:1}.scale-markings{position:absolute;top:0;left:0;width:100%;height:100%}.marking{position:absolute;top:0;width:1px;height:100%;background:rgba(255,255,255,.1)}.scale-labels{display:flex;justify-content:space-between;margin-top:6px;padding:0 8px}.scale-labels span{font-size:9px;font-weight:600;text-transform:uppercase}.flat{color:#2196f3}.in-tune{color:#4caf50}.sharp{color:#ff9800}.instrument-selector{background:rgba(0,0,0,.3);border-radius:12px;padding:12px;margin-bottom:8px;border:1px solid rgba(255,255,255,.05);flex-shrink:0}.instrument-buttons{display:grid;grid-template-columns:repeat(4,1fr);gap:6px}.instrument-btn{padding:8px 4px;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1);border-radius:8px;color:#a0a0a0;font-size:11px;font-weight:600;text-align:center;cursor:pointer;transition:all .2s ease;display:flex;flex-direction:column;align-items:center;gap:4px}.instrument-btn:hover{background:rgba(255,255,255,.1);color:#fff}.instrument-btn.active{background:rgba(77,204,189,.2);border-color:#4dccbd;color:#4dccbd;box-shadow:0 0 10px rgba(77,204,189,.3)}.instrument-btn i{font-size:16px}.string-selector{background:rgba(0,0,0,.3);border-radius:12px;padding:12px;margin-bottom:8px;border:1px solid rgba(255,255,255,.05);flex-shrink:0}.string-buttons{display:grid;grid-template-columns:repeat(3,1fr);gap:6px}.string-buttons.chromatic{grid-template-columns:repeat(3,1fr)}@media (min-width:480px){.string-buttons{grid-template-columns:repeat(6,1fr);gap:4px}.string-buttons.chromatic{grid-template-columns:repeat(4,1fr)}}.chromatic-info{grid-column:1/-1;text-align:center;padding:8px 6px;background:rgba(77,204,189,.05);border-radius:6px;border:1px solid rgba(77,204,189,.1);margin:3px 0}.chromatic-info i{font-size:16px;color:#4dccbd;margin-bottom:4px;display:block}.chromatic-info p{color:#a0e7e5;font-size:10px;line-height:1.2;margin:0}.string-buttons.chromatic{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:60px}.string-btn{padding:8px 4px;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1);border-radius:8px;color:#fff;font-size:12px;font-weight:600;text-align:center;cursor:pointer;transition:all .2s ease;display:flex;flex-direction:column;align-items:center;gap:3px}.string-btn:hover{background:rgba(255,255,255,.1)}.string-btn.active{background:rgba(77,204,189,.2);border-color:#4dccbd;color:#4dccbd;box-shadow:0 0 10px rgba(77,204,189,.3)}.string-note{font-size:16px;font-weight:700}.string-name{font-size:9px;opacity:.8}.control-panel{background:rgba(0,0,0,.3);border-radius:12px;padding:12px;margin-bottom:8px;border:1px solid rgba(255,255,255,.05);flex-shrink:0}.control-group{display:flex;justify-content:center;gap:10px;margin-bottom:10px}.control-group:last-child{margin-bottom:0}.control-btn{padding:10px 14px;border:none;border-radius:10px;font-size:12px;font-weight:600;cursor:pointer;transition:all .2s ease;display:flex;align-items:center;justify-content:center;gap:6px;min-width:80px}.control-btn.primary{background:linear-gradient(135deg,#ff4757,#ff3838);color:#fff;box-shadow:0 3px 10px rgba(77,204,189,.3)}.control-btn.primary:hover{transform:translateY(-2px);box-shadow:0 4px 12px rgba(77,204,189,.4)}.control-btn.primary.active{background:linear-gradient(135deg,#4dccbd,#2a9d8f)}.control-btn.secondary{background:rgba(255,255,255,.1);color:#fff;border:1px solid rgba(255,255,255,.2)}.control-btn.secondary:hover{background:rgba(255,255,255,.15)}.control-btn.secondary.active{background:rgba(255,154,118,.2);border-color:#ff9a76;color:#ff9a76}.control-btn.icon-only{min-width:auto;width:40px;height:40px;padding:0}.control-btn:disabled{opacity:.5;cursor:not-allowed;transform:none!important;box-shadow:none!important}.volume-indicator{background:rgba(0,0,0,.3);border-radius:12px;padding:12px;margin-bottom:8px;border:1px solid rgba(255,255,255,.05);flex-shrink:0}.volume-label{font-size:9px;text-transform:uppercase;letter-spacing:.5px;color:#a0e7e5;margin-bottom:6px;font-weight:600}.volume-bar{height:6px;background:rgba(255,255,255,.1);border-radius:3px;overflow:hidden;margin-bottom:6px}.volume-level{height:100%;width:0%;background:linear-gradient(90deg,#4caf50,#ff9800);border-radius:3px;transition:width .1s ease}.volume-value{font-size:10px;color:#a0e7e5;text-align:right}.footer-nav{background:rgba(0,0,0,.8);border-top:1px solid rgba(255,255,255,.1);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);padding:6px 0;position:sticky;bottom:0;width:100%;z-index:100;flex-shrink:0}.nav-menu{display:grid;grid-template-columns:repeat(5,1fr);gap:3px;padding:0 8px}.nav-item{display:flex;flex-direction:column;align-items:center;gap:3px;padding:8px 3px;text-decoration:none;color:#a0a0a0;border-radius:8px;transition:all .2s ease;font-size:9px}.nav-item i{font-size:14px}.nav-item:hover{background:rgba(255,255,255,.05)}.nav-item.active{color:#4dccbd;background:rgba(77,204,189,.1)}.content-sections{position:absolute;top:0;left:0;width:100%;height:100%;background:#0a0a0f;z-index:1000;overflow-y:auto;-webkit-overflow-scrolling:touch;transform:translateX(100%);transition:transform .3s ease;padding-bottom:80px}.content-sections.active{transform:translateX(0)}.content-section{padding:16px;height:100%}.hidden{display:none}.section-header{display:flex;align-items:center;gap:15px;margin-bottom:20px;padding-bottom:12px;border-bottom:1px solid rgba(255,255,255,.1)}.back-btn{width:40px;height:40px;border-radius:50%;background:rgba(255,255,255,.1);border:none;color:#fff;font-size:18px;cursor:pointer;display:flex;align-items:center;justify-content:center}.section-header h2{font-size:18px;font-weight:600;color:#fff;flex:1}.tuning-filter{display:flex;flex-wrap:wrap;gap:5px;margin-top:10px}.filter-btn{padding:6px 12px;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1);border-radius:15px;color:#a0a0a0;font-size:11px;font-weight:600;cursor:pointer;transition:all .2s ease}.filter-btn:hover{background:rgba(255,255,255,.1);color:#fff}.filter-btn.active{background:rgba(77,204,189,.2);border-color:#4dccbd;color:#4dccbd}.strings-list{display:flex;flex-direction:column;gap:8px;margin-bottom:20px}.string-item-detailed{display:flex;align-items:center;padding:12px;background:rgba(255,255,255,.05);border-radius:10px;border:1px solid rgba(255,255,255,.1)}.string-color-indicator{width:3px;height:30px;border-radius:2px;margin-right:12px}.string-info-detailed{flex:1}.string-info-detailed h4{font-size:14px;margin-bottom:3px;color:#fff}.string-info-detailed p{font-size:12px;color:#a0a0a0}.string-freq-detailed{font-size:16px;font-weight:600;color:#4dccbd}.string-info{background:rgba(255,255,255,.05);border-radius:10px;padding:12px;border:1px solid rgba(255,255,255,.1)}.string-info h3{font-size:14px;margin-bottom:8px;color:#fff;display:flex;align-items:center;gap:6px}.string-info p{font-size:13px;line-height:1.4;color:#a0a0a0}.tunings-grid{display:grid;grid-template-columns:1fr;gap:12px;flex:1;overflow-y:auto;-webkit-overflow-scrolling:touch;padding-bottom:70px}@media (min-width:480px){.tunings-grid{grid-template-columns:repeat(2,1fr);gap:20px}}.tuning-card{background:rgba(255,255,255,.05);border-radius:10px;padding:15px;border:1px solid rgba(255,255,255,.1);transition:all .2s ease}.tuning-card.active{border-color:#4dccbd;background:rgba(77,204,189,.1)}.tuning-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}.tuning-header h3{font-size:14px;color:#fff}.tuning-badge{font-size:9px;padding:3px 6px;border-radius:12px;background:rgba(77,204,189,.2);color:#4dccbd;font-weight:600}.tuning-notes{font-size:18px;font-weight:700;margin:8px 0;color:#ff9a76}.tuning-freq{font-size:12px;color:#a0a0a0;margin-bottom:12px}.tuning-select{display:block;width:auto;padding:8px 20px;background:rgba(77,204,189,.2);border:1px solid #4dccbd;border-radius:6px;color:#4dccbd;font-weight:600;cursor:pointer;transition:all .2s ease;text-align:center;min-width:90px;margin:0 auto}.tuning-card{background:rgba(255,255,255,.05);border-radius:10px;padding:15px;border:1px solid rgba(255,255,255,.1);transition:all .2s ease}.tuning-card{display:flex;flex-direction:column}.tuning-select:hover{background:rgba(77,204,189,.3)}.guide-content{padding-bottom:80px}.guide-step{display:flex;gap:12px;margin-bottom:15px;padding:12px;background:rgba(255,255,255,.05);border-radius:10px;border:1px solid rgba(255,255,255,.1)}.step-number{width:28px;height:28px;border-radius:50%;background:#4dccbd;color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:13px;flex-shrink:0}.step-content h3{font-size:14px;margin-bottom:6px;color:#fff}.step-content p{font-size:13px;line-height:1.4;color:#a0a0a0}.guide-tips{background:rgba(255,154,118,.1);border-radius:10px;padding:15px;border:1px solid rgba(255,154,118,.2);margin-top:20px}.guide-tips h3{font-size:14px;margin-bottom:12px;color:#ff9a76;display:flex;align-items:center;gap:6px}.guide-tips ul{list-style:none;padding-left:0}.guide-tips li{font-size:13px;margin-bottom:8px;color:#fff;padding-left:16px;position:relative}.guide-tips li:before{content:"•";color:#ff9a76;position:absolute;left:0}.about-content{padding-bottom:80px}.highlight-guitar{color:#4dccbd;font-weight:600}.about-card{background:rgba(255,255,255,.05);border-radius:12px;padding:20px;margin-bottom:14px;border:1px solid rgba(255,255,255,.1);text-align:center}.about-icon{margin-bottom:12px}.about-icon .agt-logo{width:70px;height:70px;object-fit:contain;border-radius:50%;background:linear-gradient(135deg,#1a1a2e 0,#16213e 100%);padding:10px;box-shadow:0 4px 12px rgba(0,0,0,.3);border:2px solid #4dccbd;transition:all .3s ease;display:inline-block}.about-icon .agt-logo:hover{transform:scale(1.05);box-shadow:0 6px 18px rgba(77,204,189,.4)}.title-version-wrapper{display:inline-block;margin-bottom:16px}.about-card h3{font-size:18px;color:#fff;margin-bottom:4px;margin-top:0}.about-version{display:inline-block;background:rgba(77,204,189,.2);color:#4dccbd;padding:4px 12px;border-radius:12px;font-size:11px;font-weight:600;letter-spacing:.3px;border:1px solid rgba(77,204,189,.3);margin-top:0}.about-description{font-size:13px;color:#a0a0a0;line-height:1.6;margin-bottom:20px;margin-top:12px;padding:0 10px}@media (max-width:768px){.about-card{padding:16px}.about-icon{margin-bottom:10px}.about-icon .agt-logo{width:60px;height:60px;padding:8px}.title-version-wrapper{margin-bottom:14px}.about-card h3{font-size:16px}.about-version{font-size:10px;padding:3px 10px}.about-description{font-size:12px;padding:0 5px;margin-bottom:16px;margin-top:10px}}.about-features{text-align:left;margin-top:18px;padding-left:24px;position:relative}.about-features h4{font-size:15px;color:#fff;margin-bottom:16px;display:flex;align-items:center;gap:8px;margin-left:-24px}.about-features h4 i{color:#4dccbd}.about-features ul{list-style:none;padding:0;margin:0;margin-left:-24px}.about-features li{color:#a0a0a0;padding:8px 0;padding-left:48px;position:relative;font-size:13px;line-height:1.5;border-bottom:1px solid rgba(255,255,255,.05)}.about-features li:last-child{border-bottom:none}.about-features li:before{content:"";position:absolute;left:24px;top:13px;width:5px;height:5px;border-radius:50%;background:#4dccbd}.about-features.alignment-guide li:before{box-shadow:0 0 0 2px rgba(77,204,189,.2)}.about-features h4{position:relative}.developer-info{background:rgba(255,255,255,.05);border-radius:12px;padding:18px;margin-bottom:14px;border:1px solid rgba(255,255,255,.1);display:flex;align-items:center;gap:14px}.developer-avatar{width:80px;height:80px;border-radius:50%;overflow:visible;flex-shrink:0;position:relative;background:#1a1a2e}.developer-avatar::before{content:'';position:absolute;top:0;left:0;right:0;bottom:0;border-radius:50%;border:3px solid transparent;animation:pulse-ring 2s infinite;z-index:1;pointer-events:none;box-sizing:border-box}.developer-photo{width:100%;height:100%;object-fit:cover;display:block;border-radius:50%;position:relative;z-index:2;transition:transform .3s ease}@keyframes pulse-ring{0%{border-color:#4dccbd;border-width:8px;transform:scale(1);box-shadow:0 0 20px rgba(77,204,189,.8)}50%{border-color:#4dccbd;border-width:15px;transform:scale(1.08);box-shadow:0 0 30px rgba(77,204,189,.6)}100%{border-color:#4dccbd;border-width:8px;transform:scale(1);box-shadow:0 0 20px rgba(77,204,189,.8)}}.developer-photo:hover{transform:scale(1.05)}@media (max-width:768px){.developer-avatar{width:70px;height:70px}}@media (max-width:480px){.developer-avatar{width:60px;height:60px}}.developer-details h4{font-size:12px;color:#a0a0a0;margin-bottom:4px;text-transform:uppercase;letter-spacing:.5px}.developer-details h3{font-size:18px;color:#fff;margin-bottom:6px}.developer-details p{font-size:13px;color:#a0a0a0;margin-bottom:10px}.developer-tags{display:flex;flex-wrap:wrap;gap:5px}.tag{background:rgba(255,255,255,.1);color:#a0a0a0;padding:3px 8px;border-radius:10px;font-size:11px;border:1px solid rgba(255,255,255,.1)}.support-section{background:rgba(255,255,255,.05);border-radius:12px;padding:18px;margin-bottom:14px;border:1px solid rgba(255,255,255,.1);text-align:center}.development-note{background:linear-gradient(135deg,rgba(255,255,255,.05) 0,rgba(77,204,189,.08) 100%);border:1px solid rgba(255,255,255,.1);border-radius:12px;padding:20px;margin:25px 0;box-shadow:0 4px 12px rgba(0,0,0,.1)}.note-header{display:flex;align-items:center;gap:12px;margin-bottom:15px;color:#fff}.note-header i{font-size:22px}.note-header h4{margin:0;font-size:18px;font-weight:600}.note-content p{margin:12px 0;font-size:14px;line-height:1.6;color:#a0a0a0}@media (max-width:768px){.development-note{padding:15px;margin:20px 0}.note-header{gap:10px}.note-header i{font-size:16px}.note-header h4{font-size:16px}.note-content p{font-size:13px}}.support-section h3{font-size:16px;color:#fff;margin-bottom:10px;display:flex;align-items:center;justify-content:center;gap:8px}.support-section>p{font-size:13px;color:#a0a0a0;line-height:1.5;margin-bottom:18px}.social-icons-horizontal{display:flex;justify-content:center;gap:16px;margin-bottom:10px}.social-icon-circle{width:42px;height:42px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:18px;color:#fff;text-decoration:none;transition:all .3s ease;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.2);box-shadow:0 2px 6px rgba(0,0,0,.15)}.social-icon-circle:hover{transform:translateY(-2px);background:rgba(255,255,255,.15);box-shadow:0 4px 8px rgba(0,0,0,.2)}.social-labels{display:flex;justify-content:center;gap:16px;margin-top:6px}.social-label{width:42px;text-align:center;font-size:10px;color:#a0a0a0;font-weight:500}.footer-notes{text-align:center;color:#a0a0a0;padding:16px 0;font-size:12px;border-top:1px solid rgba(255,255,255,.1);margin-top:14px}.footer-notes p{margin-bottom:6px}.footer-notes i{margin-right:6px;color:#a0a0a0}.disclaimer{font-size:11px;color:#666;font-style:italic;line-height:1.4}@media (max-width:768px){.developer-info{flex-direction:column;text-align:center}.developer-avatar{font-size:50px}.social-icons-horizontal{gap:14px}.social-icon-circle{width:40px;height:40px;font-size:17px}.social-labels{gap:14px}.social-label{width:40px;font-size:9px}}@media (max-width:480px){.about-card,.developer-info,.support-section{padding:14px}.social-icons-horizontal{gap:12px}.social-icon-circle{width:38px;height:38px;font-size:16px}.social-labels{gap:12px}.social-label{width:38px;font-size:8px}}.modal-overlay{position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,.8);backdrop-filter:blur(5px);-webkit-backdrop-filter:blur(5px);z-index:2000}.modal{position:fixed;top:50%;left:50%;transform:translate(-50%,-50%);width:90%;max-width:400px;background:#1a1a2e;border-radius:20px;border:1px solid rgba(255,255,255,.1);box-shadow:0 20px 60px rgba(0,0,0,.5);z-index:2001;overflow:hidden}.modal-header{display:flex;justify-content:space-between;align-items:center;padding:20px;border-bottom:1px solid rgba(255,255,255,.1);background:rgba(0,0,0,.2)}.modal-header h3{font-size:18px;color:#fff;display:flex;align-items:center;gap:10px}.modal-close{background:0 0;border:none;color:#a0a0a0;font-size:24px;cursor:pointer;line-height:1}.modal-body{padding:20px}.calibration-control,.setting-item{margin-bottom:20px}.calibration-control label,.setting-item label{display:block;margin-bottom:10px;color:#fff;font-size:14px;font-weight:500}input[type=range]{width:100%;height:6px;-webkit-appearance:none;background:rgba(255,255,255,.1);border-radius:3px;outline:0}input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:20px;height:20px;border-radius:50%;background:#4dccbd;cursor:pointer;box-shadow:0 0 10px rgba(77,204,189,.5)}select{width:100%;padding:12px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.2);border-radius:8px;color:#fff;font-size:14px}.setting-item label{display:flex;align-items:center;gap:10px;cursor:pointer}input[type=checkbox]{width:18px;height:18px;accent-color:#4dccbd}.value-display{display:block;text-align:right;font-size:12px;color:#a0a0a0;margin-top:5px}.btn{padding:12px 24px;border:none;border-radius:10px;font-size:14px;font-weight:600;cursor:pointer;transition:all .2s ease;width:auto;display:block;margin:0 auto 10px;min-width:120px;text-align:center}.modal-body{padding:20px;text-align:center}.modal-button-stack{display:flex;flex-direction:column;align-items:center;gap:10px;margin-top:25px}.modal-button-stack .btn{margin:0;width:150px}.btn:last-child{margin-bottom:0}.btn-primary{background:linear-gradient(135deg,#4dccbd,#2a9d8f);color:#fff}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 4px 15px rgba(77,204,189,.3)}.btn-secondary{background:rgba(255,255,255,.1);color:#fff;border:1px solid rgba(255,255,255,.2)}.btn-secondary:hover{background:rgba(255,255,255,.15)}.modal-actions{margin-top:25px}@media screen and (max-width:768px){input,select,textarea{font-size:16px!important}.container{font-size:14px}}.loading{position:fixed;top:0;left:0;width:100%;height:100%;background:#0a0a0f;display:flex;flex-direction:column;justify-content:center;align-items:center;gap:20px;z-index:3000}.loading-spinner{width:50px;height:50px;border:3px solid rgba(255,255,255,.1);border-radius:50%;border-top-color:#4dccbd;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}@media (max-width:768px){.social-links{grid-template-columns:1fr}.tech-details{grid-template-columns:1fr}.donation-methods{flex-direction:column;align-items:center;gap:12px}.developer-info{flex-direction:column;text-align:center}}@media (max-width:480px){.instrument-buttons{grid-template-columns:repeat(2,1fr)}.string-buttons.chromatic{grid-template-columns:repeat(2,1fr)}.nav-menu{grid-template-columns:repeat(5,1fr)}.about-card,.developer-info,.support-section,.technical-info{padding:12px}.social-links{gap:8px}.social-link{padding:10px;font-size:12px}.tech-details{grid-template-columns:1fr}}@media (max-height:600px){.tuner-main{padding:8px 12px;max-height:calc(100vh - 120px)}.control-panel,.digital-display,.instrument-selector,.string-selector,.visual-tuner,.volume-indicator{padding:8px;margin-bottom:6px}.note-display{font-size:28px}.note-letter{font-size:36px}.control-btn{padding:8px 10px;min-width:70px;font-size:11px}.footer-nav{padding:4px 0}.nav-item{padding:6px 2px;font-size:8px}.about-content{padding-bottom:80px}}.text-center{text-align:center}.mb-10{margin-bottom:10px}.mb-20{margin-bottom:20px}.mt-10{margin-top:10px}.mt-20{margin-top:20px}.p-10{padding:10px}.p-20{padding:20px}.control-panel,.digital-display,.instrument-selector,.string-selector,.visual-tuner,.volume-indicator{padding-top:10px!important;padding-bottom:10px!important}