@import "https://fonts.googleapis.com/css2?family=Nunito:wght@400;500;600;700;800&display=swap";*{box-sizing:border-box;margin:0;padding:0;font-family:Nunito,Tahoma,Geneva,Verdana,sans-serif}:root{--color-primary:#ffb300;--color-primary-dark:color-mix(in srgb, var(--color-primary) 85%, black);--color-primary-faint:color-mix(in srgb, var(--color-primary) 15%, white);--color-primary-text:#5d4700;--color-danger:#cc0202;--color-danger-dark:color-mix(in srgb, var(--color-danger) 80%, black);--color-bg:#fff;--color-border:#e5e5e5;--color-text:#202a25;--color-text-secondary:#6f6f6f;--bind-btn-width:100px;--bind-btn-bg:var(--color-bg);--bind-btn-color:var(--color-primary);--bind-btn-border:var(--color-border);--bind-btn-box-shadow:0 4px 0 var(--color-border);--bind-btn-radius:5px;--bind-btn-padding:8px;--bind-btn-font-weight:bold;--bind-btn-active-bg:var(--color-primary-faint);--bind-btn-active-color:var(--color-primary);--bind-btn-active-border:var(--color-primary);--bind-btn-active-box-shadow:0 4px 0 var(--color-primary);--bind-btn-border-radius:16px;--toggle-track-off:#d1d1d1}[data-theme=dark]{--color-bg:#1a1b23;--color-border:#2e3044;--color-text:#e4e4e8;--color-text-secondary:#8b8fa8;--toggle-track-off:#3e3f4e;--color-primary-faint:color-mix(in srgb, var(--color-primary) 15%, black)}body,html{background-color:var(--color-bg);width:100%;height:100%;overflow:hidden}#app-container{width:100vw;height:100vh;position:relative}#game-container,#ui-container{width:100%;height:100%;position:absolute;top:0;left:0}#game-container{z-index:2}#ui-container{z-index:3;pointer-events:auto;--harmonic-ladder-width:min(92vw, 1100px)}#vexflow-notation{pointer-events:none;z-index:4;position:absolute;font-family:Bravura,Academico,serif!important}#vexflow-notation svg,#vexflow-notation svg text,#vexflow-notation svg tspan{width:100%;height:100%;display:block;font-family:Bravura,Academico,serif!important}#vexflow-notation svg{transform-origin:0 0;transform-box:fill-box;width:100%;height:auto;transform:scale(2)}.menu-screen{background:var(--color-bg);opacity:0;pointer-events:none;flex-direction:column;justify-content:center;align-items:center;width:100%;height:100%;transition:opacity .4s;display:flex;position:absolute;top:0;left:0}.menu-screen.active{opacity:1;pointer-events:auto}.menu-title{color:var(--color-text);letter-spacing:2px;margin-bottom:2rem;font-size:3.5rem}.menu-cards-container{flex-wrap:wrap;justify-content:center;align-items:stretch;gap:24px;width:min(100%,1100px);padding:0 16px;display:flex}.duo-card{flex:320px;max-width:420px}.menu-btn{text-align:center;letter-spacing:.8px;color:#fff;background-color:var(--color-primary);border:2px solid var(--color-primary);box-shadow:0 4px 0 var(--color-primary-dark);cursor:pointer;border-radius:12px;padding:16px 24px;font-family:Nunito,sans-serif;font-size:16px;font-weight:700;text-decoration:none;transition:filter .2s,transform .1s,box-shadow .1s;display:inline-block;position:relative;top:0}.menu-btn:hover{filter:brightness(1.1)}.menu-btn:active{transform:translateY(4px);box-shadow:0 0}.bind-btn{width:var(--bind-btn-width);background:var(--bind-btn-bg);color:var(--bind-btn-color);border:2px solid var(--bind-btn-border);padding:var(--bind-btn-padding);border-radius:var(--bind-btn-radius);box-shadow:var(--bind-btn-box-shadow);font-weight:var(--bind-btn-font-weight);cursor:pointer;text-transform:uppercase;transition:filter .2s,transform .1s,box-shadow .1s}.bind-btn:hover{filter:brightness(.95)}.bind-btn:active{box-shadow:0 0px 0 var(--bind-btn-border);transform:translateY(4px)}.bind-btn.binding{background:var(--bind-btn-active-bg);color:var(--bind-btn-active-color);border-color:var(--bind-btn-active-border);box-shadow:var(--bind-btn-active-box-shadow)}.bind-btn.binding:active{box-shadow:0 0px 0 var(--bind-btn-active-border);transform:translateY(4px)}.menu-btn.secondary{text-align:center;letter-spacing:.8px;color:#fff;background-color:var(--color-danger);border:2px solid var(--color-danger);box-shadow:0 4px 0 var(--color-danger-dark);cursor:pointer;border-radius:12px;padding:16px 24px;font-family:Nunito,sans-serif;font-size:16px;font-weight:700;text-decoration:none;transition:filter .2s,transform .1s,box-shadow .1s;display:inline-block;position:relative;top:0}.menu-btn.secondary:hover{filter:brightness(1.1)}.menu-btn.secondary:active{box-shadow:0 0px 0 var(--color-danger-dark);transform:translateY(4px)}.duo-card{background-color:var(--color-bg);border:2px solid var(--color-border);text-align:left;box-sizing:border-box;border-radius:16px;flex-direction:column;gap:20px;padding:24px;display:flex}.duo-card-content{flex-direction:column;gap:6px;display:flex}.duo-card-title{color:var(--color-text);margin:0;font-size:1.25rem;font-weight:700}.duo-card-text{color:var(--color-text-secondary);margin:0;font-size:.95rem;line-height:1.4}.duo-badge{letter-spacing:.5px;border-radius:6px;align-self:flex-start;margin-bottom:4px;padding:4px 8px;font-size:.75rem;font-weight:900}.badge-super{color:#fff;background:linear-gradient(135deg,#2bf0ab,#a526ff)}.badge-nitro{color:#fff;background-color:#ff4b4b}#app-logo{z-index:10;-webkit-user-select:none;user-select:none;cursor:pointer;opacity:1;pointer-events:auto;transform-origin:50%;width:64px;height:64px;transition:transform .2s cubic-bezier(.175,.885,.32,1.275),filter .2s,opacity .3s;display:block;position:absolute;top:25px;left:25px}#app-logo .logo-layer{object-fit:contain;-webkit-user-select:none;user-select:none;pointer-events:none;width:100%;height:100%;transition:top 80ms,transform 80ms,filter 80ms;position:absolute;left:0}#app-logo .logo-layer.top{z-index:2;top:0}#app-logo .logo-layer.bottom{z-index:1;top:6px}#app-logo:hover{filter:brightness(1.08)}#app-logo:active .logo-layer.top{transform:translateY(6px)}.settings-card{background:var(--color-bg);border:2px solid var(--color-border);text-align:center;color:#fff;border-radius:20px;padding:40px}.settings-card h2{color:var(--color-text);margin-bottom:20px}.settings-card p{color:var(--color-text-secondary);margin-bottom:30px}.hud-text{left:calc(50% - var(--harmonic-ladder-width) / 2);background:var(--color-bg);max-width:min(260px,24vw);color:var(--color-primary);border:2px solid var(--color-border);letter-spacing:.4px;text-align:left;z-index:6;pointer-events:none;border-radius:18px;padding:.85rem 1.1rem;font-size:clamp(1rem,1.8vw,1.4rem);font-weight:700;transition:opacity .4s,transform .2s;position:absolute;top:calc(33% - 5rem)}.hud-text.hidden{opacity:0}#harmonic-ladder{--harmonic-ladder-width:min(92vw, 1100px);width:var(--harmonic-ladder-width);z-index:5;pointer-events:none;flex-direction:row;justify-content:space-between;align-items:center;gap:clamp(10px,1.5vw,18px);transition:opacity .4s;display:flex;position:absolute;top:33%;left:50%;transform:translate(-50%)}#harmonic-ladder.hidden{opacity:0}.ladder-rung{aspect-ratio:1;background:var(--color-bg);border:2px solid var(--color-border);width:clamp(72px,8vw,110px);box-shadow:0 4px 0px var(--color-border);color:var(--color-text-secondary);border-radius:18px;justify-content:center;align-items:center;font-size:clamp(.9rem,1.2vw,1.1rem);font-weight:800;transition:filter,transform .1s,box-shadow .1s;display:flex}.ladder-rung.active{background:var(--color-primary-faint);border-color:var(--color-primary);color:var(--color-primary);box-shadow:0 0px 0 var(--color-primary);transform:translateY(4px)}.flashcard-screen{opacity:0;pointer-events:none;z-index:10;transform-origin:top;justify-content:center;align-items:flex-start;transition:opacity .4s;display:flex;position:absolute;top:10%;left:0;right:0}.flashcard-screen.active{opacity:1;pointer-events:auto}.flashcard-layout{flex-direction:row;justify-content:center;align-items:flex-start;gap:24px;width:fit-content;display:flex}.flashcard-card{background:var(--color-bg);border:2px solid var(--color-border);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);border-radius:32px;order:1;width:min(880px,92vw);max-width:880px;min-height:520px;padding:42px 36px 34px}.flashcard-options-panel{order:2}.flashcard-card.success{border-color:#b7f5a5cc;box-shadow:0 24px 65px #75d27838}.flashcard-card.error{border-color:#ffb3b3;box-shadow:0 10px 50px #ff696938}.flashcard-header{flex-wrap:wrap;justify-content:space-between;align-items:flex-start;gap:18px;margin-bottom:24px;display:flex}.flashcard-title{color:var(--color-text);margin:0;font-size:2rem;line-height:1.1}.flashcard-score{background:var(--color-bg);border:2px solid var(--color-border);color:var(--color-text);border-radius:18px;padding:14px 18px;font-size:1rem;font-weight:700}.flashcard-notation-wrapper{background:var(--color-bg);border-radius:22px;justify-content:center;align-items:center;width:100%;min-height:320px;padding:24px;display:flex;position:relative;overflow:hidden}.flashcard-card{position:relative}.flashcard-feedback{background:var(--color-bg);min-width:240px;max-width:320px;color:var(--color-text);text-align:center;letter-spacing:.03em;opacity:0;visibility:hidden;border:2px solid #ffb3b3;border-radius:14px;padding:12px 16px;font-size:.95rem;font-weight:700;transition:opacity .2s,transform .2s,visibility .2s;position:absolute;bottom:24px;right:24px;transform:translateY(8px)}.flashcard-feedback.visible{opacity:1;visibility:visible;transform:translateY(0)}.flashcard-body{align-items:stretch;gap:24px;width:100%;display:flex}.flashcard-options-panel{z-index:9;background:var(--color-bg);border:2px solid var(--color-border);pointer-events:auto;border-radius:24px;flex-direction:column;gap:14px;width:250px;min-width:240px;padding:22px;display:flex;position:relative}.flashcard-options-title{letter-spacing:.05em;color:var(--color-text);font-size:.95rem;font-weight:700}.flashcard-option-button,.flashcard-option-button.bind-btn{width:100%}.flashcard-option-button:hover{filter:brightness(.95)}.flashcard-option-button:active{box-shadow:0 0px 0 var(--color-border);transform:translateY(4px)}.flashcard-options-note{color:var(--color-text-secondary);margin-top:4px;font-size:.92rem;line-height:1.4}.flashcard-options-divider{border:none;border-top:1px solid var(--color-border);margin:2px 0}.flashcard-upcoming-toggle-label{cursor:pointer;-webkit-user-select:none;user-select:none;align-items:center;gap:10px;display:flex}.flashcard-upcoming-checkbox{opacity:0;width:0;height:0;position:absolute}.flashcard-upcoming-toggle-track{background:var(--toggle-track-off);border-radius:10px;width:36px;min-width:36px;height:20px;transition:background .2s;position:relative}.flashcard-upcoming-toggle-track:after{content:"";background:#fff;border-radius:50%;width:14px;height:14px;transition:transform .2s;position:absolute;top:3px;left:3px;box-shadow:0 1px 3px #0000002e}.flashcard-upcoming-checkbox:checked+.flashcard-upcoming-toggle-track{background:var(--color-primary)}.flashcard-upcoming-checkbox:checked+.flashcard-upcoming-toggle-track:after{transform:translate(16px)}.flashcard-upcoming-label-text{color:var(--color-text);font-size:.9rem;font-weight:600;line-height:1.3}.custom-note-menu-overlay{-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);opacity:0;pointer-events:none;z-index:100;background:#00000073;justify-content:center;align-items:center;transition:opacity .2s;display:flex;position:fixed;inset:0}.custom-note-menu-overlay.active{opacity:1;pointer-events:auto}.custom-note-menu-overlay.hidden{display:none}.custom-note-menu{background:var(--color-bg);border-radius:28px;flex-direction:column;gap:18px;width:min(560px,92vw);max-height:min(82vh,720px);padding:26px;display:flex;overflow:hidden;box-shadow:0 28px 80px #00000029}.custom-note-menu-header{flex-wrap:wrap;justify-content:space-between;align-items:flex-start;gap:16px;display:flex}.custom-note-menu-header h3{color:var(--color-text);margin:0;font-size:1.25rem}.custom-note-menu-description{color:var(--color-text-secondary);margin:8px 0 0;font-size:.95rem;line-height:1.4}.custom-note-menu-actions{flex-wrap:wrap;gap:12px;display:flex}.custom-note-list{flex-direction:column;gap:18px;max-height:450px;padding-right:6px;display:flex;overflow:auto}.custom-note-section{flex-direction:column;gap:12px;display:flex}.custom-note-section-label{letter-spacing:.02em;color:var(--color-text);text-transform:uppercase;font-size:.95rem;font-weight:700}.custom-note-section-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;display:grid}.custom-note-row{background:var(--color-bg);color:var(--color-text);cursor:pointer;border-radius:12px;align-items:center;gap:12px;padding:12px 14px;font-size:.95rem;display:flex}.custom-note-row:hover{background:var(--color-border)}.custom-note-checkbox{width:18px;height:18px;accent-color:var(--color-primary);cursor:pointer}.menu-btn.small{padding:10px 16px;font-size:.95rem}@media (width<=1180px){.flashcard-options-panel{width:100%;max-width:360px;margin:24px auto 0;position:relative;top:auto;left:auto;transform:none}}@media (width<=940px){.flashcard-body{flex-direction:column}.flashcard-options-panel{width:100%}.custom-note-section-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (width<=640px){.custom-note-section-grid{grid-template-columns:1fr}}.valve-key-label{z-index:6;pointer-events:none;border:2px solid var(--color-border);background:var(--color-bg);min-width:56px;color:var(--color-primary);text-transform:uppercase;text-align:center;letter-spacing:.08em;white-space:nowrap;box-shadow:none;border-radius:999px;padding:10px 12px;font-size:1.4rem;font-weight:800;position:absolute;transform:translate(-50%)}#vexflow-notation{pointer-events:none;position:absolute;inset:0}.flashcard-footer{text-align:center;color:var(--color-primary);letter-spacing:.03em;width:fit-content;margin-top:24px;font-size:1.3rem;font-weight:800;display:inline-block}.settings-field-label{color:var(--color-text-secondary);margin-bottom:10px;display:block}#instrument-select{background:var(--color-bg);color:var(--color-text);border:2px solid var(--color-border);cursor:pointer;border-radius:8px;width:200px;padding:10px;font-size:1rem}.settings-keybind-label{color:var(--color-text-secondary);margin-bottom:5px;font-size:.85rem;display:block}.settings-laptop-note{color:var(--color-danger);text-align:center;margin-top:20px;font-size:.8rem;line-height:1.4}.settings-icon{background-color:var(--color-primary);border:2px solid var(--color-primary);width:56px;height:56px;box-shadow:0 4px 0 var(--color-primary-dark);color:#fff;cursor:pointer;z-index:10;pointer-events:auto;border-radius:16px;justify-content:center;align-items:center;font-size:28px;transition:filter .2s,transform .1s,box-shadow .1s;display:flex;position:absolute;top:25px;right:25px}.settings-icon:hover{filter:brightness(1.1)}.settings-icon:active{box-shadow:0 0px 0 var(--color-primary-dark);transform:translateY(4px)}