.btn{display:inline-flex;align-items:center;justify-content:center;padding:.75rem 1.5rem;font-weight:600;border-radius:var(--radius-md);transition:all .2s ease;font-size:1rem}.btn:disabled{opacity:.7;cursor:not-allowed}.btn-primary{background-color:var(--color-primary);color:#fff}.btn-primary:hover:not(:disabled){background-color:var(--color-primary-hover);transform:translateY(-1px)}.btn-secondary{background-color:var(--color-secondary);color:#fff}.btn-outline{background-color:transparent;border:2px solid var(--color-border);color:var(--color-text)}.btn-outline:hover:not(:disabled){border-color:var(--color-primary);color:var(--color-primary)}.btn-ghost{background-color:transparent;color:var(--color-text-muted)}.btn-ghost:hover:not(:disabled){background-color:#0000000d;color:var(--color-text)}.loader{width:1rem;height:1rem;border:2px solid rgba(255,255,255,.3);border-radius:50%;border-top-color:#fff;animation:spin 1s ease-in-out infinite}.landing-page{flex:1;display:flex;flex-direction:column;width:100%}.navbar{display:flex;justify-content:space-between;align-items:center;padding:1rem;width:100%;max-width:1200px;margin:0 auto}.logo{display:flex;align-items:center;gap:.5rem;font-weight:800;font-size:1.1rem;color:var(--color-primary)}.logo span{white-space:nowrap}.logo-icon{width:20px;height:20px}.nav-actions{display:flex;align-items:center;gap:.5rem}.hero-section{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:2rem 1rem;width:100%;background:radial-gradient(circle at top right,#6366f111,transparent 40%),radial-gradient(circle at bottom left,#ec489911,transparent 40%)}.hero-content{width:100%;max-width:100%}.hero-title{font-size:2rem;line-height:1.2;font-weight:800;margin-bottom:1rem;color:var(--color-text);padding:0 .5rem}.hero-title .highlight{display:block;background:linear-gradient(135deg,var(--color-primary),var(--color-secondary));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.hero-subtitle{font-size:1rem;color:var(--color-text-muted);margin-bottom:2rem;line-height:1.5;padding:0 1rem}.login-container{width:100%;padding:0 1rem;display:flex;flex-direction:column;align-items:center;gap:1rem}.btn-cta{width:100%;font-size:1rem;padding:1rem;display:flex;justify-content:center}.login-note{font-size:.8rem;color:var(--color-text-muted)}.features-section{padding:3rem 1rem;width:100%;max-width:1200px;margin:0 auto}.section-title{text-align:center;font-size:1.75rem;font-weight:700;margin-bottom:2rem;color:var(--color-text)}.features-grid{display:grid;grid-template-columns:1fr;gap:1.5rem}.feature-card{background:var(--color-surface);padding:1.5rem;border-radius:var(--radius-lg);border:1px solid var(--color-border);display:flex;flex-direction:column;align-items:center;text-align:center}.feature-icon{color:var(--color-primary);margin-bottom:1rem}.feature-title{font-size:1.1rem;font-weight:600;margin-bottom:.5rem;color:var(--color-text)}.feature-desc{color:var(--color-text-muted);font-size:.9rem;line-height:1.4}.footer{text-align:center;padding:1.5rem;font-size:.8rem;color:var(--color-text-muted);border-top:1px solid var(--color-border)}@media(min-width:768px){.navbar{padding:1rem 2rem}.logo-icon{width:24px;height:24px}.nav-actions{gap:1rem}.hero-section{padding:4rem 1rem}.hero-title{font-size:3.5rem;line-height:1.1}.hero-title .highlight{display:inline}.hero-subtitle{font-size:1.25rem;max-width:600px;margin-inline:auto}.btn-cta{width:auto;font-size:1.1rem;padding:1rem 2.5rem}.features-section{padding:5rem 2rem}.features-grid{grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:2rem}.feature-card{align-items:flex-start;text-align:left;padding:2rem}}.sidebar{position:fixed;left:0;top:0;height:100vh;background:var(--color-surface);border-right:1px solid var(--color-border);transition:width .3s ease;z-index:100;display:flex;flex-direction:column}.sidebar.expanded{width:240px}.sidebar.collapsed{width:64px}.sidebar-header{display:flex;align-items:center;justify-content:space-between;padding:1rem;border-bottom:1px solid var(--color-border);min-height:64px}.sidebar-title{font-size:1.25rem;font-weight:600;margin:0;white-space:nowrap;overflow:hidden}.sidebar-toggle{background:transparent;border:1px solid var(--color-border);border-radius:var(--radius-md);padding:.5rem;cursor:pointer;display:flex;align-items:center;justify-content:center;color:var(--color-text);transition:all .2s ease}.sidebar-toggle:hover{background:var(--color-background);border-color:var(--color-primary)}.sidebar-nav{flex:1;padding:1rem 0;overflow-y:auto}.sidebar-item{width:100%;display:flex;align-items:center;gap:.75rem;padding:.75rem 1rem;background:transparent;border:none;border-left:3px solid transparent;color:var(--color-text-muted);cursor:pointer;transition:all .2s ease;font-size:.9375rem;font-weight:500;text-align:left}.sidebar-item:hover{background:var(--color-background);color:var(--color-text)}.sidebar-item.active{background:var(--color-primary-light);color:var(--color-primary);border-left-color:var(--color-primary)}.sidebar-icon{flex-shrink:0}.sidebar-label{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.sidebar.collapsed .sidebar-item{justify-content:center;padding:.75rem}.sidebar.collapsed .sidebar-label{display:none}@media(max-width:768px){.sidebar.expanded{width:200px}.sidebar.collapsed{width:56px}}.song-card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:1rem;display:flex;justify-content:space-between;align-items:center;transition:all .2s ease;cursor:pointer;position:relative}.song-card:hover{border-color:var(--color-primary);transform:translateY(-2px);box-shadow:var(--shadow-md)}.song-card-header{display:flex;align-items:center;gap:1rem;flex:1;overflow:hidden}.song-card-icon{flex-shrink:0;color:var(--color-text-muted)}.song-card-icon.pdf{color:#ef4444}.song-card-icon.chordpro{color:var(--color-primary)}.song-card-icon.txt{color:var(--color-text-muted)}.song-card-info{overflow:hidden}.song-card-title{font-size:1rem;font-weight:600;color:var(--color-text);margin:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.song-card-artist{font-size:.875rem;color:var(--color-text-muted);margin:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.song-card-actions{display:flex;align-items:center;gap:.25rem;margin-left:.5rem}.song-card-action-btn{color:var(--color-text-muted);padding:.4rem;border-radius:var(--radius-sm);opacity:0;transition:all .2s ease;display:flex;align-items:center;justify-content:center}.song-card:hover .song-card-action-btn{opacity:1}.song-card-action-btn:hover{background:var(--color-background);color:var(--color-text)}.song-card-action-btn.delete:hover{color:#ef4444;background:#ef44441a}.song-card-action-btn.edit:hover{color:var(--color-primary);background:var(--color-primary-light)}@media(max-width:768px){.song-card-action-btn{opacity:1}}.artist-group{margin-bottom:1rem;border:1px solid var(--color-border);border-radius:var(--radius-lg);overflow:hidden;background:var(--color-surface)}.artist-group-header{padding:1rem;display:flex;align-items:center;justify-content:space-between;cursor:pointer;background:var(--color-surface);transition:background-color .2s ease;-webkit-user-select:none;user-select:none}.artist-group-header:hover{background:var(--color-background)}.artist-group-info{display:flex;align-items:center;gap:.75rem;color:var(--color-text)}.artist-icon{color:var(--color-primary)}.artist-name{margin:0;font-size:1rem;font-weight:600}.song-count{font-size:.875rem;color:var(--color-text-muted);font-weight:400}.artist-group-content{max-height:0;overflow:hidden;transition:max-height .3s ease-out,padding .3s ease;background:var(--color-background)}.artist-group-content.expanded{max-height:2000px;padding:1rem;border-top:1px solid var(--color-border)}.song-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1rem}@media(min-width:768px){.song-grid{grid-template-columns:repeat(2,1fr)}}@media(min-width:1024px){.song-grid{grid-template-columns:repeat(3,1fr)}}.song-list-container{margin-top:2rem}.song-list-header{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:1rem;margin-bottom:1.5rem}.section-title{margin:0;font-size:1.5rem;color:var(--color-text)}.search-box{position:relative;flex:1;max-width:400px}.search-input{width:100%;padding:.75rem 1rem .75rem 2.5rem;border-radius:var(--radius-md);border:1px solid var(--color-border);background:var(--color-surface);color:var(--color-text);font-size:.9375rem;transition:border-color .2s}.search-input:focus{outline:none;border-color:var(--color-primary)}.search-icon{position:absolute;left:.75rem;top:50%;transform:translateY(-50%);color:var(--color-text-muted);pointer-events:none}.song-list-loading,.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:3rem;color:var(--color-text-muted);text-align:center;background:var(--color-surface);border-radius:var(--radius-lg);border:1px solid var(--color-border)}.empty-icon{margin-bottom:1rem;opacity:.5}.spinner{width:32px;height:32px;border:4px solid var(--color-border);border-top-color:var(--color-primary);border-radius:50%;animation:spin 1s linear infinite;margin-bottom:1rem}.artist-groups{display:flex;flex-direction:column;gap:1rem}@media(max-width:640px){.song-list-header{flex-direction:column;align-items:stretch}}.song-upload-container{margin-bottom:2rem}.upload-area{border:2px dashed var(--color-border);border-radius:var(--radius-lg);padding:2rem;text-align:center;cursor:pointer;background:var(--color-surface);transition:all .2s ease;position:relative}.upload-area:hover,.upload-area.drag-over{border-color:var(--color-primary);background:var(--color-primary-light)}.upload-area.uploading{cursor:default;opacity:.8}.hidden-input{display:none}.upload-content{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:.5rem}.upload-icon{color:var(--color-primary);margin-bottom:.5rem}.upload-text{font-size:1rem;font-weight:500;color:var(--color-text);margin:0}.upload-highlight{color:var(--color-primary);font-weight:600}.upload-hint{font-size:.875rem;color:var(--color-text-muted);margin:0}.format-hint{font-family:monospace;background:var(--color-background);padding:.25rem .5rem;border-radius:var(--radius-sm);margin-top:.5rem}.upload-status{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1rem}.spinner{width:24px;height:24px;border:3px solid var(--color-border);border-top-color:var(--color-primary);border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.upload-message{display:flex;align-items:center;gap:.75rem;padding:.75rem 1rem;border-radius:var(--radius-md);margin-top:1rem;font-size:.9375rem;animation:slideIn .3s ease}.upload-message.error{background:#ef44441a;color:#ef4444;border:1px solid rgba(239,68,68,.2)}.upload-message.success{background:#22c55e1a;color:#22c55e;border:1px solid rgba(34,197,94,.2)}.upload-message button{margin-left:auto;padding:.25rem;border-radius:50%;color:currentColor;opacity:.7;transition:opacity .2s}.upload-message button:hover{opacity:1;background:#0000000d}@keyframes slideIn{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}.dashboard-container{display:flex;min-height:100vh}.dashboard-main{flex:1;margin-left:240px;transition:margin-left .3s ease;padding:2rem;max-width:1200px}.dashboard-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:2rem}.dashboard-header-title{display:flex;align-items:center;gap:.5rem}.dashboard-header-title h1{margin:0}.dashboard-header-actions{display:flex;align-items:center;gap:.75rem}.dashboard-card{background:var(--color-surface);padding:2rem;border-radius:var(--radius-lg);border:1px solid var(--color-border);margin-bottom:2rem}.user-info-header{display:flex;justify-content:space-between;align-items:flex-start;flex-wrap:wrap;gap:1rem}.user-info-header h2{margin-bottom:.5rem}.user-code{color:var(--color-text-muted);margin-bottom:1rem}.user-code strong{font-family:monospace;font-size:1.2rem;padding:.25rem .5rem;background:var(--color-background);border-radius:var(--radius-md);border:1px solid var(--color-border)}.tier-badge{display:flex;align-items:center;gap:.5rem;padding:.75rem 1.5rem;border-radius:var(--radius-lg);font-weight:700;text-transform:uppercase;font-size:.875rem}.tier-badge.free{background:#6b728015;border:2px solid #6B7280;color:#6b7280}.tier-badge.basic{background:#3b82f615;border:2px solid #3B82F6;color:#3b82f6}.tier-badge.pro{background:#9333ea15;border:2px solid #9333EA;color:#9333ea}.tier-badge.hyper{background:#ffd70015;border:2px solid #FFD700;color:gold}.cifras-counter{margin-top:1.5rem;padding:1rem;background:var(--color-background);border-radius:var(--radius-md);border:1px solid var(--color-border)}.cifras-counter-header{display:flex;justify-content:space-between;align-items:center}.cifras-counter-label{color:var(--color-text-muted)}.cifras-counter-value{font-size:1.5rem;font-weight:700}.cifras-progress{margin-top:.5rem;height:8px;background:var(--color-border);border-radius:4px;overflow:hidden}.cifras-progress-bar{height:100%;transition:width .3s ease}.cifras-progress-bar.free{background:#6b7280}.cifras-progress-bar.basic{background:#3b82f6}.cifras-progress-bar.pro{background:#9333ea}.feature-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:1rem}.feature-card{background:var(--color-surface);padding:1.5rem;border-radius:var(--radius-lg);border:1px solid var(--color-border);text-align:center}.feature-card h3{margin:0 0 .5rem}.feature-card p{color:var(--color-text-muted);font-size:.875rem;margin:0}.loading-container{display:flex;align-items:center;justify-content:center;min-height:100vh}@media(max-width:768px){.dashboard-main{margin-left:200px}}@media(max-width:640px){.dashboard-main{margin-left:56px;padding:1rem}.dashboard-header{flex-direction:column;align-items:flex-start;gap:1rem}}:root{--color-primary: #0f172a;--color-primary-hover: #334155;--color-primary-light: #e2e8f0;--color-secondary: #475569;--color-background: #eef2f6;--color-surface: #f8fafc;--color-text: #1e293b;--color-text-muted: #64748b;--color-border: #cbd5e1;--spacing-xs: .25rem;--spacing-sm: .5rem;--spacing-md: 1rem;--spacing-lg: 1.5rem;--spacing-xl: 2rem;--radius-sm: .5rem;--radius-md: .75rem;--radius-lg: 1rem;--shadow-sm: 0 2px 4px 0 rgb(0 0 0 / .05);--shadow-md: 0 4px 6px -1px rgb(0 0 0 / .1), 0 2px 4px -1px rgb(0 0 0 / .06);--shadow-glow: 0 0 15px rgba(0, 0, 0, .1);--color-chord: #cc5500}[data-theme=dark]{--color-primary: #ffffff;--color-primary-hover: #e2e8f0;--color-primary-light: #ffffff15;--color-background: #0f1115;--color-surface: #181b21;--color-text: #e2e8f0;--color-text-muted: #94a3b8;--color-border: #2d3139;--shadow-sm: 0 2px 4px 0 rgb(0 0 0 / .5);--shadow-md: 0 8px 16px -4px rgb(0 0 0 / .5);--shadow-glow: 0 0 20px rgba(255, 255, 255, .1)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,system-ui,-apple-system,sans-serif;background-color:var(--color-background);color:var(--color-text);line-height:1.5;transition:background-color .3s ease,color .3s ease;min-height:100vh}#root{min-height:100vh;display:flex;flex-direction:column}a{color:inherit;text-decoration:none}button{cursor:pointer;border:none;background:none;font-family:inherit}input{font-family:inherit}.container{max-width:1200px;margin:0 auto;padding:0 var(--spacing-md)}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);border:0}