:root{--color-primary: #8B4513;--color-primary-light: #A0522D;--color-primary-dark: #654321;--color-accent: #D2691E;--color-accent-light: #E89A5B;--color-bg: #FFF8DC;--color-bg-secondary: #FAEBD7;--color-surface: #FFFFFF;--color-surface-hover: #F5F5DC;--color-text: #2C1810;--color-text-secondary: #5D4037;--color-text-muted: #8D6E63;--color-border: #D7CCC8;--color-border-light: #EFEBE9;--color-success: #4CAF50;--color-warning: #FF9800;--color-error: #F44336;--color-info: #2196F3;--color-brand-orange: #FF5722;--color-brand-orange-bg: rgba(255, 87, 34, .1);--color-white: #ffffff;--color-black: #000000;--color-white-alpha-10: rgba(255, 255, 255, .1);--color-white-alpha-15: rgba(255, 255, 255, .15);--color-white-alpha-50: rgba(255, 255, 255, .5);--color-white-alpha-70: rgba(255, 255, 255, .7);--color-white-alpha-80: rgba(255, 255, 255, .8);--color-white-alpha-90: rgba(255, 255, 255, .9);--color-focus-ring: rgba(139, 69, 19, .1);--color-overlay: rgba(0, 0, 0, .5);--color-overlay-dark: rgba(0, 0, 0, .6);--color-success-bg: rgba(76, 175, 80, .1);--color-error-bg: rgba(244, 67, 54, .1);--color-error-hover: #d32f2f;--color-skeleton-bg: #e0e0e0;--color-skeleton-highlight: #f0f0f0;--color-heatmap-0: var(--color-bg-secondary);--color-heatmap-1: #90EE90;--color-heatmap-2: #4CAF50;--color-heatmap-3: #2E7D32;--color-heatmap-4: #1B5E20;--color-social-google-bg: #ffffff;--color-social-google-text: #757575;--color-social-apple-bg: #000000;--color-social-microsoft-bg: #2F2F2F;--font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen", "Ubuntu", "Cantarell", "Fira Sans", "Droid Sans", "Helvetica Neue", sans-serif;--font-family-mono: "SF Mono", Monaco, "Cascadia Code", "Roboto Mono", Consolas, "Courier New", monospace;--font-size-xs: .75rem;--font-size-sm: .875rem;--font-size-base: 1rem;--font-size-lg: 1.125rem;--font-size-xl: 1.25rem;--font-size-2xl: 1.5rem;--font-size-3xl: 1.875rem;--font-size-4xl: 2.25rem;--font-size-5xl: 3rem;--font-size-6xl: 4rem;--font-weight-normal: 400;--font-weight-medium: 500;--font-weight-semibold: 600;--font-weight-bold: 700;--line-height-tight: 1.25;--line-height-normal: 1.5;--line-height-relaxed: 1.75;--spacing-xs: .25rem;--spacing-sm: .5rem;--spacing-md: 1rem;--spacing-lg: 1.5rem;--spacing-xl: 2rem;--spacing-2xl: 3rem;--spacing-3xl: 4rem;--radius-sm: .25rem;--radius-md: .5rem;--radius-lg: .75rem;--radius-xl: 1rem;--radius-full: 9999px;--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .1), 0 2px 4px -1px rgba(0, 0, 0, .06);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1), 0 4px 6px -2px rgba(0, 0, 0, .05);--shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, .1), 0 10px 10px -5px rgba(0, 0, 0, .04);--transition-fast: .15s ease-in-out;--transition-base: .25s ease-in-out;--transition-slow: .35s ease-in-out;--z-dropdown: 1000;--z-sticky: 1020;--z-fixed: 1030;--z-modal-backdrop: 1040;--z-modal: 1050;--z-popover: 1060;--z-tooltip: 1070;--breakpoint-mobile: 767px;--breakpoint-tablet: 1023px;--breakpoint-desktop: 1024px}[data-theme=dark]{--color-primary: #A0522D;--color-primary-light: #BC6C3C;--color-primary-dark: #8B4513;--color-accent: #E89A5B;--color-accent-light: #F4B183;--color-bg: #1A1410;--color-bg-secondary: #2C2218;--color-surface: #3E3228;--color-surface-hover: #4A3A2E;--color-text: #F5E6D3;--color-text-secondary: #D7C4B0;--color-text-muted: #A89580;--color-border: #5D4D3F;--color-border-light: #4A3A2E;--color-success: #66BB6A;--color-warning: #FFA726;--color-error: #EF5350;--color-info: #42A5F5;--color-social-google-bg: #ffffff;--color-social-google-text: #757575;--color-social-apple-bg: #ffffff;--color-social-apple-text: #000000;--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .3);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .4), 0 2px 4px -1px rgba(0, 0, 0, .3);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .4), 0 4px 6px -2px rgba(0, 0, 0, .3);--shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, .5), 0 10px 10px -5px rgba(0, 0, 0, .4);--color-heatmap-0: var(--color-bg-secondary);--color-heatmap-1: #1B5E20;--color-heatmap-2: #2E7D32;--color-heatmap-3: #4CAF50;--color-heatmap-4: #90EE90;--color-skeleton-bg: #2d3436;--color-skeleton-highlight: #353b48;--color-focus-ring: rgba(160, 82, 45, .2)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;scroll-behavior:smooth;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{font-family:var(--font-family);font-size:var(--font-size-base);line-height:var(--line-height-normal);color:var(--color-text);background-color:var(--color-bg);transition:background-color var(--transition-base),color 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var(--spacing-lg);border-radius:var(--radius-md);font-weight:var(--font-weight-medium);transition:all var(--transition-fast);cursor:pointer;border:none;background:none}.btn-primary{background-color:var(--color-primary);color:#fff}.btn-primary:hover:not(:disabled){background-color:var(--color-primary-light);transform:translateY(-1px);box-shadow:var(--shadow-md)}.btn-secondary{background-color:var(--color-surface);color:var(--color-text);border:1px solid var(--color-border)}.btn-secondary:hover:not(:disabled){background-color:var(--color-surface-hover);border-color:var(--color-primary)}.btn-icon{padding:var(--spacing-sm);border-radius:var(--radius-md);background-color:var(--color-surface);transition:all var(--transition-fast)}.btn-icon:hover:not(:disabled){background-color:var(--color-surface-hover);transform:scale(1.05)}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--color-bg-secondary)}::-webkit-scrollbar-thumb{background:var(--color-border);border-radius:var(--radius-full)}::-webkit-scrollbar-thumb:hover{background:var(--color-primary)}@media(max-width:767px){html{font-size:14px}.container{padding:0 var(--spacing-sm)}}body{margin:0}.lucide{flex-shrink:0}@keyframes fadeInUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.app-layout{min-height:100vh;display:flex;flex-direction:column}.app-header{background-color:var(--color-surface);box-shadow:var(--shadow-sm);position:sticky;top:0;z-index:var(--z-sticky)}.header-content{max-width:1200px;margin:0 auto;padding:var(--spacing-md) var(--spacing-lg);display:flex;justify-content:space-between;align-items:center}.app-title{font-size:var(--font-size-2xl);font-weight:var(--font-weight-bold);color:var(--color-primary);margin:0;display:flex;align-items:center;gap:10px}.settings-btn{font-size:24px;display:flex;align-items:center;justify-content:center;padding:var(--spacing-sm)}.app-main{flex:1;max-width:1200px;width:100%;margin:0 auto;padding:var(--spacing-2xl) var(--spacing-lg);opacity:0;animation:fadeInUp .8s ease-out .2s forwards}.app-footer{position:relative;z-index:5;background-color:var(--color-surface);padding:var(--spacing-lg);text-align:center;border-top:1px solid var(--color-border)}.app-footer p{margin:0;font-size:var(--font-size-sm);color:var(--color-text-muted)}@media(max-width:767px){.header-content{padding:var(--spacing-sm) var(--spacing-md)}.app-title{font-size:var(--font-size-xl)}.app-main{padding:var(--spacing-lg) var(--spacing-md)}}.main-timer-section{display:flex;flex-direction:column;gap:var(--spacing-xl);align-items:center;position:relative;transition:transform .3s ease;background:transparent!important;border-radius:0;box-shadow:none!important}.main-timer-section.focus{transform:scale(1.1)}.focus-toggle-btn{position:absolute;top:0;right:0;width:40px;height:40px;border-radius:50%;background:transparent;border:none;color:var(--color-text-secondary);display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .2s ease;z-index:10}.focus-toggle-btn:hover{background:var(--color-surface);color:var(--color-text)}.mode-toggle{display:flex;position:relative;background-color:var(--color-surface);padding:var(--spacing-xs);border-radius:var(--radius-full);box-shadow:var(--shadow-sm);gap:0;isolation:isolate}.toggle-slider{position:absolute;top:var(--spacing-xs);bottom:var(--spacing-xs);left:var(--spacing-xs);width:calc(50% - var(--spacing-xs));border-radius:var(--radius-full);transition:transform .3s cubic-bezier(.4,0,.2,1),background-color .3s ease;z-index:1}.mode-toggle[data-mode=work] .toggle-slider{transform:translate(0);background-color:var(--color-primary)}.mode-toggle[data-mode=break] .toggle-slider{transform:translate(100%);background-color:var(--color-accent)}.toggle-btn{flex:1;position:relative;z-index:2;padding:var(--spacing-sm) var(--spacing-xl);border-radius:var(--radius-full);border:none;background:transparent;color:var(--color-text-secondary);font-weight:var(--font-weight-semibold);cursor:pointer;transition:color .3s ease;white-space:nowrap}.toggle-btn:hover{color:var(--color-text)}.toggle-btn.active{color:#fff}.toggle-btn.active.work,.toggle-btn.active.break{background-color:transparent}.timer-circle-container{position:relative;width:320px;height:320px;display:flex;justify-content:center;align-items:center;background:transparent;border-radius:50%;border:1px solid transparent;transition:all .3s ease}body.has-video-background .timer-circle-container{background:#0006;box-shadow:0 4px 20px #0003;border:1px solid var(--color-white-alpha-15)}.timer-svg{transform:rotate(-90deg)}.timer-circle-track{fill:none;stroke:var(--color-surface)}.timer-circle-container.work .timer-circle-track,.timer-circle-container.break .timer-circle-track{stroke:var(--color-surface-hover)}.timer-circle-progress{fill:none;transition:stroke-dashoffset 1s linear}.timer-circle-container.work .timer-circle-progress{stroke:var(--color-primary)}.timer-circle-container.break .timer-circle-progress{stroke:var(--color-accent)}.timer-text-overlay{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);text-align:center;display:flex;flex-direction:column;align-items:center;width:80%}.session-type{font-size:var(--font-size-lg);font-weight:var(--font-weight-semibold);color:var(--color-text-secondary);margin-bottom:var(--spacing-xs);text-transform:uppercase;letter-spacing:.05em}.time{font-size:4.5rem;font-weight:var(--font-weight-bold);font-family:var(--font-family-mono);color:var(--color-primary);line-height:1;margin:var(--spacing-sm) 0;text-shadow:none}body.has-video-background .time{color:var(--color-white);text-shadow:0 4px 12px var(--color-overlay-dark)}body.has-video-background .session-type,body.has-video-background .session-counter{color:var(--color-white-alpha-90);text-shadow:0 2px 4px var(--color-overlay)}body.has-video-background .timer-circle-track{stroke:var(--color-white-alpha-10)}body.has-video-background .timer-circle-container .timer-circle-progress{stroke:var(--color-white);filter:drop-shadow(0 0 4px var(--color-white-alpha-50))}body.has-video-background .focus-toggle-btn{color:var(--color-white-alpha-80)}body.has-video-background .focus-toggle-btn:hover{background:var(--color-white-alpha-10);color:var(--color-white)}body.has-video-background .toggle-btn{color:var(--color-white-alpha-70)}body.has-video-background .toggle-btn:hover,body.has-video-background .toggle-btn.active{color:var(--color-white)}body.has-video-background .mode-toggle{background-color:#0006;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);border:1px solid var(--color-white-alpha-15)}.timer-circle-container.break .time{color:var(--color-accent)}.session-counter{font-size:var(--font-size-base);color:var(--color-text-muted);margin-top:var(--spacing-xs)}.timer-controls-dock{display:flex;align-items:center;justify-content:center;gap:var(--spacing-lg);padding:var(--spacing-sm) var(--spacing-xl);background:var(--color-surface);border-radius:var(--radius-full);box-shadow:var(--shadow-md);transition:all .3s ease}.control-btn{display:flex;align-items:center;justify-content:center;border:none;background:transparent;cursor:pointer;transition:all .2s cubic-bezier(.4,0,.2,1);color:var(--color-text-secondary);border-radius:50%}.control-btn.primary{width:64px;height:64px;background:var(--color-primary);color:#fff;box-shadow:var(--shadow-md)}.icon-play{margin-left:4px}.control-btn.primary:hover{transform:scale(1.05);background:var(--color-primary-hover);box-shadow:var(--shadow-lg)}.control-btn.primary:active{transform:scale(.95)}.control-btn.secondary{width:42px;height:42px}.control-btn.secondary:hover{background:var(--color-bg-secondary);color:var(--color-text)}.control-btn.secondary:disabled{opacity:.3;cursor:not-allowed;background:transparent!important}body.has-video-background 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var(--color-border);cursor:pointer;inset:0;position:absolute;transition:.4s;border-radius:34px}.slider:before{background-color:var(--color-text-secondary);bottom:2px;content:"";height:18px;left:2px;position:absolute;transition:.4s;width:18px;border-radius:50%}input:checked+.slider{background-color:var(--color-primary);border-color:var(--color-primary)}input:checked+.slider:before{background-color:#fff;transform:translate(20px)}.ambient-header h3{font-size:var(--font-size-xl);margin:0;display:flex;align-items:center;gap:.5rem;color:var(--color-primary)}.session-label{font-size:var(--font-size-sm);color:var(--color-text-secondary);background-color:var(--color-bg-secondary);padding:var(--spacing-xs) var(--spacing-md);border-radius:var(--radius-full);font-weight:var(--font-weight-medium)}.sound-selector{display:grid;grid-template-columns:repeat(auto-fill,minmax(100px,1fr));gap:var(--spacing-sm);margin-bottom:var(--spacing-lg)}.sound-btn{display:flex;flex-direction:column;align-items:center;gap:var(--spacing-xs);padding:var(--spacing-md);background-color:var(--color-bg-secondary);border:2px solid transparent;border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition-fast)}.sound-btn:hover{background-color:var(--color-surface-hover);transform:translateY(-2px)}.sound-btn.active{background-color:var(--color-primary);color:#fff;border-color:var(--color-primary-dark);box-shadow:var(--shadow-md)}.sound-icon{font-size:var(--font-size-2xl);display:flex;align-items:center;justify-content:center}.sound-label{font-size:var(--font-size-sm);font-weight:var(--font-weight-medium)}.ambient-controls{display:flex;flex-direction:column;align-items:center;gap:var(--spacing-xs)}.ambient-volume-control{flex:1;display:flex;align-items:center;gap:var(--spacing-sm)}.volume-percentage{font-size:.8rem;color:var(--text-secondary);min-width:3ch;text-align:right;margin-right:8px;font-variant-numeric:tabular-nums}.ambient-volume-slider{flex:1;height:6px;border-radius:var(--radius-full);background:var(--color-border);outline:none;-webkit-appearance:none;appearance:none;cursor:pointer}.ambient-volume-slider::-webkit-slider-thumb{-webkit-appearance:none;appearance:none;width:16px;height:16px;border-radius:50%;background:var(--color-primary);cursor:pointer;transition:transform var(--transition-fast)}.ambient-volume-slider::-webkit-slider-thumb:hover{transform:scale(1.2)}.ambient-volume-slider::-moz-range-thumb{width:16px;height:16px;border-radius:50%;background:var(--color-primary);cursor:pointer;border:none;transition:transform var(--transition-fast)}.ambient-volume-slider::-moz-range-thumb:hover{transform:scale(1.2)}@media(max-width:767px){.sound-selector{grid-template-columns:repeat(3,1fr)}.sound-btn{padding:var(--spacing-sm)}.sound-icon{font-size:var(--font-size-xl)}.sound-label{font-size:var(--font-size-xs)}}.bgm-system-container{background-color:var(--color-surface);border-radius:var(--radius-lg);padding:var(--spacing-lg);box-shadow:var(--shadow-md);margin-top:1rem;display:flex;flex-direction:column;gap:var(--spacing-md)}.bgm-header{display:flex;align-items:center;justify-content:space-between;gap:var(--spacing-md);margin-bottom:var(--spacing-sm)}.bgm-header-left{display:flex;align-items:center;gap:var(--spacing-sm)}.bgm-subheader{display:flex;align-items:center;margin-bottom:2px}.bgm-title{display:flex;align-items:center;gap:.5rem;font-size:var(--font-size-xl);font-weight:600;color:var(--color-primary)}.playlist-selector{display:flex;gap:var(--spacing-sm);overflow-x:auto;padding-bottom:.5rem;scrollbar-width:thin}.playlist-btn{flex:0 0 auto;padding:.6rem 1rem;background:var(--color-bg-secondary);border:1px solid transparent;border-radius:var(--radius-full);color:var(--color-text-secondary);font-weight:500;cursor:pointer;transition:all var(--transition-fast);font-size:var(--font-size-sm)}.playlist-btn:hover{background:var(--color-surface-hover);transform:translateY(-1px)}.playlist-btn.active{background:var(--color-primary);color:#fff;border-color:var(--color-primary);box-shadow:var(--shadow-sm)}.bgm-controls-section{background:var(--color-bg-secondary);border-radius:var(--radius-md);padding:var(--spacing-md);display:flex;flex-direction:column;gap:var(--spacing-md)}.now-playing-info{text-align:center;margin-bottom:var(--spacing-md)}.progress-section{display:flex;flex-direction:column;gap:4px;padding:0 var(--spacing-xs);margin-bottom:2px}.gamepad-controls{display:flex;justify-content:center;gap:1.5rem;align-items:center;margin-bottom:0;margin-top:0}.bgm-volume-control{display:flex;align-items:center;gap:var(--spacing-sm)}.playlist-label-small{display:block;font-size:var(--font-size-xs);color:var(--color-text-secondary);margin-bottom:2px;font-weight:500}.current-track-title{font-size:var(--font-size-md);font-weight:600;color:var(--color-text-primary)}.control-btn{background:none;border:none;color:var(--color-text-secondary);cursor:pointer;padding:.5rem;border-radius:50%;transition:background .2s,color 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input:focus{outline:none;border-color:var(--color-accent)}.auth-error{background:var(--color-error-bg);color:var(--color-error);padding:.75rem;border-radius:var(--radius-sm);font-size:.9rem;display:flex;align-items:center;gap:.5rem}.full-width{width:100%;margin-top:.5rem}.social-buttons-container{display:flex;flex-direction:column;gap:.75rem;margin-bottom:1.5rem}.btn-social{position:relative;width:100%;display:flex;align-items:center;justify-content:center;gap:.75rem;padding:.75rem;border:1px solid var(--color-border);border-radius:var(--radius-md);background:#fff;color:#333;font-size:1rem;font-weight:500;cursor:pointer;transition:all .2s}.btn-google{background:var(--color-social-google-bg);color:var(--color-social-google-text);border-color:var(--color-border)}.btn-google:hover{background:var(--color-bg-secondary)}.btn-apple{background:var(--color-social-apple-bg);color:var(--color-surface);border-color:var(--color-social-apple-bg)}[data-theme=dark] 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