.app-header{background:#fff;box-shadow:0 2px 4px #0000001a;padding:16px 0;margin-bottom:24px}.app-header .container{display:flex;justify-content:space-between;align-items:center}.app-logo{font-size:24px;font-weight:700;color:var(--primary-color)}.app-nav{display:flex;gap:24px;align-items:center}.app-nav a{color:var(--text-secondary);font-weight:500;transition:color .2s}.app-nav a:hover{color:var(--text-primary)}.app-nav a.active{color:var(--primary-color)}.auth-page{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px}.auth-card{background:#fff;border-radius:12px;box-shadow:0 4px 6px #0000001a;padding:40px;max-width:500px;width:100%}.auth-card h1{text-align:center;margin-bottom:8px;color:var(--text-primary)}.auth-card p{text-align:center;color:var(--text-secondary);margin-bottom:32px}.auth-link{text-align:center;margin-top:20px;color:var(--text-secondary)}.auth-link a{color:var(--primary-color);font-weight:600}.auth-link a:hover{text-decoration:underline}.info-tooltip{display:inline-block;margin-left:8px;cursor:help;font-size:16px;color:var(--primary-color);position:relative;vertical-align:middle}.info-tooltip-content{visibility:hidden;opacity:0;position:absolute;bottom:125%;left:50%;transform:translate(-50%);background-color:#333;color:#fff;padding:12px 16px;border-radius:8px;width:280px;font-size:13px;line-height:1.6;z-index:1000;box-shadow:0 4px 12px #0000004d;transition:opacity .2s,visibility .2s;text-align:left;font-weight:400}.info-tooltip-content:after{content:"";position:absolute;top:100%;left:50%;transform:translate(-50%);border:6px solid transparent;border-top-color:#333}.info-tooltip:hover .info-tooltip-content{visibility:visible;opacity:1}.info-tooltip-content strong{display:block;margin-bottom:8px;font-weight:600}.info-tooltip-content ul{list-style:none;padding:0;margin:0}.info-tooltip-content li{margin-bottom:4px}@media (max-width: 768px){.app-nav{gap:16px}.auth-card{padding:24px}.info-tooltip-content{width:240px;left:auto;right:0;transform:none}.info-tooltip-content:after{left:auto;right:20px;transform:none}}*{margin:0;padding:0;box-sizing:border-box}:root{--primary-color: #1DB954;--primary-hover: #1ed760;--bg-color: #f5f5f5;--card-bg: #ffffff;--text-primary: #191414;--text-secondary: #666666;--border-color: #e0e0e0;--error-color: #e74c3c;--success-color: #1DB954;--warning-color: #f39c12}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background-color:var(--bg-color);color:var(--text-primary)}code{font-family:source-code-pro,Menlo,Monaco,Consolas,Courier New,monospace}button{font-family:inherit;cursor:pointer}input,textarea,select{font-family:inherit}a{text-decoration:none;color:inherit}.container{max-width:1200px;margin:0 auto;padding:20px}.card{background:var(--card-bg);border-radius:8px;box-shadow:0 2px 4px #0000001a;padding:20px;margin-bottom:20px}.btn{padding:12px 24px;border:none;border-radius:24px;font-size:14px;font-weight:600;transition:all .2s;display:inline-flex;align-items:center;justify-content:center;gap:8px}.btn-primary{background-color:var(--primary-color);color:#fff}.btn-primary:hover{background-color:var(--primary-hover);transform:scale(1.02)}.btn-secondary{background-color:transparent;border:1px solid var(--border-color);color:var(--text-primary)}.btn-secondary:hover{border-color:var(--text-primary)}.btn-danger{background-color:var(--error-color);color:#fff}.btn-danger:hover{opacity:.9}.vote-buttons{display:flex;gap:4px}.vote-btn{width:36px;height:36px;border-radius:50%;background:transparent;border:2px solid var(--border-color);color:var(--text-primary);font-size:18px;display:flex;align-items:center;justify-content:center;transition:all .2s;cursor:pointer}.vote-btn.voted-up{background:var(--primary-color);border-color:var(--primary-color);color:#fff}.vote-btn.voted-down{background:#e22134;border-color:#e22134;color:#fff}.vote-btn:active{transform:scale(.9)}.form-group{margin-bottom:20px}.form-group label{display:block;margin-bottom:8px;font-weight:500;color:var(--text-primary)}.form-group input,.form-group textarea,.form-group select{width:100%;padding:12px;border:1px solid var(--border-color);border-radius:4px;font-size:14px;transition:border-color .2s}.form-group input:focus,.form-group textarea:focus,.form-group select:focus{outline:none;border-color:var(--primary-color)}.error-message{color:var(--error-color);font-size:14px;margin-top:8px}.success-message{color:var(--success-color);font-size:14px;margin-top:8px}.loading{display:flex;align-items:center;justify-content:center;padding:40px}.spinner{border:3px solid rgba(0,0,0,.1);border-top:3px solid var(--primary-color);border-radius:50%;width:40px;height:40px;animation:spin 1s linear infinite}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}