*{margin:0;padding:0;box-sizing:border-box}:root{--color-primary: #27ae60;--color-primary-dark: #229954;--color-secondary: #95a5a6;--color-danger: #e74c3c;--color-warning: #f39c12;--color-bg: #f8f9fa;--color-text: #2d3436;--color-text-light: #636e72;--color-white: #ffffff;--shadow-sm: 0 2px 4px rgba(0, 0, 0, .1);--shadow-md: 0 4px 6px rgba(0, 0, 0, .1);--shadow-lg: 0 8px 16px rgba(0, 0, 0, .15);--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border-width:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;background:linear-gradient(135deg,#e8f5e9,#f1f8f4);color:var(--color-text);min-height:100vh;line-height:1.6}.container{max-width:600px;margin:0 auto;padding:20px;min-height:100vh;display:flex;flex-direction:column}header{text-align:center;margin-bottom:24px;padding:16px 0}header 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20px;font-style:italic}.settings-form{max-width:400px}.form-group{margin-bottom:20px}.form-group label{display:block;font-weight:600;margin-bottom:8px;color:var(--color-text)}.form-group input[type=number]{width:100%;padding:12px;border:2px solid #e1e8ed;border-radius:var(--radius-sm);font-size:14px;transition:border-color .2s ease}.form-group input[type=number]:focus{outline:none;border-color:var(--color-primary)}.form-group.checkbox{display:flex;align-items:center;gap:12px}.form-group.checkbox input{width:20px;height:20px;cursor:pointer}.form-group.checkbox label{margin:0;cursor:pointer}footer{margin-top:auto;padding-top:20px;text-align:center;font-size:12px;color:var(--color-text-light)}footer a{color:var(--color-primary);text-decoration:none;font-weight:600}footer a:hover{text-decoration:underline}.status-badge{display:inline-block;padding:4px 8px;border-radius:12px;font-size:11px;font-weight:600}.status-badge.online{background:#d4edda;color:#155724}.status-badge.offline{background:#f8d7da;color:#721c24}@media (max-width: 480px){.container{padding:12px}.timer-section{padding:30px 16px}.controls{gap:8px}.btn{padding:12px 16px;font-size:12px}.mode-tabs{flex-direction:column}.tab-btn{padding:10px}.nav-tabs{padding:6px}.nav-btn{padding:10px 8px;font-size:11px}.nav-btn span{font-size:18px}}.loading{display:inline-block;width:16px;height:16px;border:3px solid rgba(255,255,255,.3);border-radius:50%;border-top-color:#fff;animation:spin .6s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}