:root{--bg-gradient:linear-gradient(135deg, #000 0%, #0f172a 100%);--glass-bg:#0009;--glass-border:#ffffff26;--primary:#0ea5e9;--primary-glow:#38bdf8;--secondary:#3b82f6;--text-main:#fff;--text-muted:#94a3b8;--section-padding:4rem 6rem;--section-padding-large:6rem;--hero-font-size:4.5rem;--h2-font-size:3rem;--panel-padding:3rem 4rem;--panel-padding-medium:3rem;--piano-key-height:140px;--drum-pad-size:100px;--sidebar-width:300px;--sidebar-overflow:auto;--violin-label-right:-40px}*{box-sizing:border-box;margin:0;padding:0;font-family:Inter,system-ui,-apple-system,sans-serif}body{background-color:#000;background-image:var(--bg-gradient);color:var(--text-main);background-attachment:fixed;flex-direction:column;min-height:100vh;margin:0;display:flex}#root{flex-direction:column;width:100%;min-height:100vh;display:flex}.glass-panel{background:var(--glass-bg);-webkit-backdrop-filter:blur(16px);border:1px solid var(--glass-border);border-radius:20px;transition:all .4s cubic-bezier(.175,.885,.32,1.275);box-shadow:0 8px 32px #0ea5e91a}.glass-panel:hover{border-color:#0ea5e966;transform:translateY(-5px)scale(1.02);box-shadow:0 15px 40px #0ea5e933}.btn-primary{background:var(--primary);color:#fff;cursor:pointer;border:none;border-radius:8px;padding:12px 24px;font-size:1rem;font-weight:600;transition:all .3s;box-shadow:0 4px 15px #0ea5e94d}.btn-primary:hover{background:var(--primary-glow);transform:translateY(-3px)scale(1.05);box-shadow:0 8px 25px #38bdf899,0 0 15px #38bdf866}.btn-secondary{color:var(--secondary);border:2px solid var(--secondary);cursor:pointer;background:0 0;border-radius:8px;padding:12px 24px;font-size:1rem;font-weight:600;transition:all .3s}.btn-secondary:hover{background:#3b82f61a;transform:translateY(-3px)scale(1.05);box-shadow:0 8px 20px #3b82f633,0 0 10px #3b82f61a}input{border:1px solid var(--glass-border);width:100%;color:var(--text-main);background:#000c;border-radius:8px;margin-bottom:16px;padding:14px;font-size:1rem;transition:all .3s;box-shadow:inset 0 2px 4px #00000005}input:focus{border-color:var(--primary);outline:none;box-shadow:0 0 0 3px #0ea5e933}.nav-bar{-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid var(--glass-border);background:#0009;justify-content:space-between;align-items:center;padding:1rem 2rem;display:flex;box-shadow:0 4px 20px #00000008}.nav-links{gap:1.5rem;display:flex}.nav-links a{color:var(--text-muted);font-weight:600;text-decoration:none;transition:all .3s}.nav-links a:hover{color:var(--primary);transform:translateY(-2px)}.auth-container{flex:1;justify-content:center;align-items:center;padding:2rem;display:flex}.auth-card{background:#111;border-radius:20px;flex-direction:column;gap:1rem;width:100%;max-width:400px;padding:3rem 2rem;display:flex;box-shadow:0 10px 40px #0ea5e91a}.auth-card h2{text-align:center;background:linear-gradient(45deg, var(--primary), var(--secondary));-webkit-text-fill-color:transparent;color:#0000;-webkit-background-clip:text;background-clip:text;margin-bottom:1.5rem;font-size:2rem}.error-msg{color:#ef4444;text-align:center;font-size:.875rem}.mobile-toggle{display:none!important}.responsive-flex-row-to-col{flex-direction:row;display:flex}.responsive-header{justify-content:space-between;align-items:flex-end;display:flex}@media (width<=768px){:root{--section-padding:2rem 1.2rem;--section-padding-large:2.5rem 1.2rem;--hero-font-size:2.2rem;--h2-font-size:1.8rem;--panel-padding:2rem 1.2rem;--panel-padding-medium:1.5rem 1.2rem;--piano-key-height:100px;--drum-pad-size:75px;--sidebar-width:100%;--sidebar-overflow:visible;--violin-label-right:10px}.mobile-toggle{display:flex!important}.hero-content{margin-top:-12vh}.responsive-flex-row-to-col{flex-direction:column!important;gap:1.5rem!important;overflow-y:auto!important}.responsive-flex-row-to-col>div{width:100%!important;max-width:100%!important}.responsive-header{flex-direction:column!important;align-items:flex-start!important;gap:1rem!important}.responsive-header>div{width:100%}.nav-bar{padding:.8rem 1.2rem!important}.nav-links{display:none}.nav-links.mobile-open{-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);border-bottom:1px solid var(--glass-border);z-index:100;background:#000000f2;flex-direction:column;align-items:center;gap:1.2rem;padding:1.5rem;position:absolute;top:100%;left:0;right:0;box-shadow:0 10px 20px #0000000d;display:flex!important}}