:root{--bg-primary: #0d0d0d;--bg-secondary: #1a1a1a;--bg-tertiary: #252525;--accent: #22c55e;--accent-hover: #16a34a;--run-color: #22c55e;--walk-color: #3b82f6;--warmup-color: #f59e0b;--text-primary: #e8e8e8;--text-secondary: #999;--text-muted: #666;--border: #333;--danger: #ff4444;--warning: #ff8c00;--success: #22c55e;--font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Helvetica Neue", Arial, sans-serif;--font-mono: "JetBrains Mono", "Fira Code", "SF Mono", "Cascadia Code", "Consolas", monospace;--radius-sm: 4px;--radius-md: 8px;--radius-lg: 12px;--radius-full: 9999px;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .3);--shadow-md: 0 4px 12px rgba(0, 0, 0, .4);--shadow-lg: 0 8px 24px rgba(0, 0, 0, .5);--transition-fast: .15s ease;--transition-normal: .25s ease;--transition-slow: .4s ease;--tap-target-min: 44px}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{-webkit-text-size-adjust:100%;-moz-text-size-adjust:100%;text-size-adjust:100%;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{font-family:var(--font-sans);font-size:16px;line-height:1.6;color:var(--text-primary);background-color:var(--bg-primary);min-height:100vh;overflow-x:hidden}img,picture,video,canvas,svg{display:block;max-width:100%}input,button,textarea,select{font:inherit;color:inherit}button{cursor:pointer;border:none;background:none}a{color:var(--accent);text-decoration:none;transition:color var(--transition-fast)}a:hover{color:var(--accent-hover)}ul,ol{list-style:none}h1,h2,h3,h4,h5,h6{line-height:1.2;font-weight:600;color:var(--text-primary)}h1{font-size:2rem}h2{font-size:1.5rem}h3{font-size:1.25rem}h4{font-size:1.1rem}p{color:var(--text-secondary)}#root{min-height:100vh;display:flex;flex-direction:column}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--bg-primary)}::-webkit-scrollbar-thumb{background:var(--bg-tertiary);border-radius:var(--radius-full)}::-webkit-scrollbar-thumb:hover{background:var(--border)}*{scrollbar-width:thin;scrollbar-color:var(--bg-tertiary) var(--bg-primary)}.app-layout{display:flex;flex-direction:column;min-height:100vh}.app-header{display:flex;align-items:center;justify-content:space-between;padding:0 24px;height:60px;background-color:var(--bg-secondary);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:100;will-change:transform;transform:translateZ(0);box-shadow:0 1px 8px #0000;transition:box-shadow .2s ease}.app-header--scrolled{box-shadow:0 2px 12px #0006}.app-header__title{font-size:1.25rem;font-weight:700;color:var(--text-primary);letter-spacing:-.02em;text-decoration:none}.app-header__title-accent{color:var(--accent)}.app-header__nav{display:flex;align-items:center;gap:16px}.app-header__nav-link{color:var(--text-secondary);font-size:.9rem;font-weight:500;text-decoration:none;transition:color var(--transition-fast);padding:4px 8px;border-radius:var(--radius-sm)}.app-header__nav-link:hover{color:var(--text-primary)}.app-header__nav-link.active{color:var(--accent)}.app-header__user{color:var(--text-muted);font-size:.8rem;padding:4px 10px;border:1px solid var(--border);border-radius:var(--radius-full);transition:all var(--transition-fast)}.app-header__user:hover{color:var(--danger);border-color:var(--danger)}.app-main{flex:1;padding:24px;max-width:800px;width:100%;margin:0 auto}.card{background-color:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius-lg);padding:20px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:600;border-radius:var(--radius-md);transition:all var(--transition-fast);white-space:nowrap;min-height:var(--tap-target-min)}.btn--sm{padding:6px 14px;font-size:.85rem;min-height:36px}.btn--md{padding:10px 20px;font-size:.95rem}.btn--lg{padding:14px 28px;font-size:1.1rem}.btn--primary{background-color:var(--accent);color:#000}.btn--primary:hover:not(:disabled){background-color:var(--accent-hover)}.btn--secondary{background-color:var(--bg-tertiary);color:var(--text-primary);border:1px solid var(--border)}.btn--secondary:hover:not(:disabled){background-color:var(--border)}.btn--danger{background-color:transparent;color:var(--danger);border:1px solid var(--danger)}.btn--danger:hover:not(:disabled){background-color:var(--danger);color:#fff}.btn--ghost{background-color:transparent;color:var(--text-secondary)}.btn--ghost:hover:not(:disabled){color:var(--text-primary);background-color:var(--bg-tertiary)}.btn--full-width{width:100%}.btn:disabled{opacity:.4;cursor:not-allowed}.username-prompt{max-width:400px;margin:0 auto}.username-prompt__label{margin-bottom:12px;font-size:.95rem}.username-prompt__row{display:flex;gap:8px}.username-prompt__input{flex:1;padding:10px 14px;background-color:var(--bg-tertiary);border:1px solid var(--border);border-radius:var(--radius-md);color:var(--text-primary);font-size:.95rem;outline:none;transition:border-color var(--transition-fast)}.username-prompt__input:focus{border-color:var(--accent)}.spinner-block{display:flex;flex-direction:column;align-items:center;gap:12px;padding:40px 0;color:var(--text-muted);font-size:.9rem}.spinner-block__dot{width:24px;height:24px;border:3px solid var(--border);border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.progress-bar{width:100%;height:6px;background-color:var(--bg-tertiary);border-radius:var(--radius-full);overflow:hidden}.progress-bar__fill{height:100%;border-radius:var(--radius-full);transition:width var(--transition-normal);background-color:var(--accent)}.progress-bar__fill--run{background-color:var(--run-color)}.progress-bar__fill--walk{background-color:var(--walk-color)}.progress-bar__fill--warmup{background-color:var(--warmup-color)}.streak-calendar{display:flex;align-items:center;gap:16px;overflow:hidden}.streak-calendar__streak{display:flex;flex-direction:column;align-items:center;min-width:48px;flex-shrink:0}.streak-calendar__streak-num{font-size:1.5rem;font-weight:700;color:var(--accent);line-height:1}.streak-calendar__streak-label{font-size:.7rem;color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em}.streak-calendar__track{flex:1;overflow-x:auto;overflow-y:hidden;cursor:grab;-webkit-overflow-scrolling:touch;scrollbar-width:none}.streak-calendar__track::-webkit-scrollbar{display:none}.streak-calendar__cells{display:flex;gap:4px;padding:4px 0}.streak-calendar__cell{display:flex;flex-direction:column;align-items:center;gap:4px;min-width:32px}.streak-calendar__cell--today{position:relative}.streak-calendar__day-label{font-size:.6rem;color:var(--text-muted);text-transform:uppercase}.streak-calendar__dot{width:28px;height:28px;border-radius:50%;background-color:var(--bg-tertiary);display:flex;align-items:center;justify-content:center;position:relative}.streak-calendar__dot--active{background-color:var(--accent)}.streak-calendar__dot--active .streak-calendar__dot-num{color:#000;font-weight:600}.streak-calendar__dot--partial{background-color:transparent}.streak-calendar__dot-ring{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%}.streak-calendar__dot-num{font-size:.65rem;color:var(--text-muted);z-index:1}.streak-calendar__cell--today .streak-calendar__dot{box-shadow:0 0 0 2px var(--accent)}.program-progress{display:grid;grid-template-columns:repeat(8,1fr);gap:8px}.program-progress__week{display:flex;flex-direction:column;align-items:center;gap:6px}.program-progress__week-label{font-size:.7rem;color:var(--text-muted);text-transform:uppercase;font-weight:600}.program-progress__days{display:flex;flex-direction:column;gap:4px}.program-progress__day{width:28px;height:28px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:.7rem;font-weight:600;border:2px solid var(--border);color:var(--text-muted);transition:all var(--transition-fast);cursor:pointer;text-decoration:none}.program-progress__day--completed{background-color:var(--accent);border-color:var(--accent);color:#000}.program-progress__day--next{border-color:var(--accent);color:var(--accent);animation:pulse-border 2s ease-in-out infinite}@keyframes pulse-border{0%,to{box-shadow:0 0 #22c55e66}50%{box-shadow:0 0 0 4px #22c55e00}}.program-progress__day--selected{border-color:var(--text-primary);color:var(--text-primary);background-color:var(--bg-tertiary)}.program-progress__day:hover{border-color:var(--accent);color:var(--accent)}.next-workout{display:flex;flex-direction:column;gap:16px}.next-workout__header{display:flex;justify-content:space-between;align-items:center}.next-workout__title{font-size:1.1rem;font-weight:600}.next-workout__subtitle{font-size:.85rem;color:var(--text-muted)}.next-workout__intervals{display:flex;gap:3px;height:32px;border-radius:var(--radius-md);overflow:hidden}.next-workout__interval{display:flex;align-items:center;justify-content:center;font-size:.65rem;font-weight:600;color:#000000b3;min-width:4px}.next-workout__interval--run{background-color:var(--run-color)}.next-workout__interval--walk{background-color:var(--walk-color)}.next-workout__interval--warmup{background-color:var(--warmup-color)}.next-workout__summary{display:flex;gap:16px;font-size:.85rem;color:var(--text-secondary)}.next-workout__stat{display:flex;align-items:center;gap:4px}.next-workout__stat-dot{width:8px;height:8px;border-radius:50%}.workout-history__list{display:flex;flex-direction:column;gap:8px}.workout-history__item{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;background-color:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius-md)}.workout-history__item-info{display:flex;flex-direction:column;gap:2px}.workout-history__item-title{font-weight:600;font-size:.95rem}.workout-history__item-meta{font-size:.8rem;color:var(--text-muted);display:flex;gap:12px}.workout-history__item-actions{display:flex;gap:8px;align-items:center}.workout-history__delete-btn{color:var(--text-muted);font-size:.8rem;padding:4px 8px;border-radius:var(--radius-sm);transition:all var(--transition-fast)}.workout-history__delete-btn:hover{color:var(--danger);background-color:#ff44441a}.workout-history__more{display:flex;justify-content:center;padding-top:12px}.workout-page{min-height:100vh;display:flex;flex-direction:column;transition:background-color var(--transition-slow)}.workout-page--run{background-color:#052e16}.workout-page--walk{background-color:#172554}.workout-page--warmup{background-color:#451a03}.workout-page--done{background-color:var(--bg-primary)}.workout-page__header{display:flex;justify-content:space-between;align-items:center;padding:16px 24px}.workout-page__back{color:var(--text-secondary);font-size:.9rem;text-decoration:none;display:flex;align-items:center;gap:4px}.workout-page__phase-label{font-size:.85rem;font-weight:600;text-transform:uppercase;letter-spacing:.1em}.workout-page__phase-label--run{color:var(--run-color)}.workout-page__phase-label--walk{color:var(--walk-color)}.workout-page__phase-label--warmup{color:var(--warmup-color)}.workout-page__info{font-size:.85rem;color:var(--text-muted)}.workout-page__body{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:24px;padding:0 24px}.workout-page__countdown{font-family:var(--font-mono);font-size:clamp(4rem,15vw,8rem);font-weight:700;line-height:1;letter-spacing:-.02em}.workout-page__countdown--run{color:var(--run-color)}.workout-page__countdown--walk{color:var(--walk-color)}.workout-page__countdown--warmup{color:var(--warmup-color)}.workout-page__phase-info{font-size:1.1rem;color:var(--text-secondary);text-align:center}.workout-page__progress{width:100%;max-width:400px}.workout-page__intervals{display:flex;gap:3px;width:100%;max-width:400px;height:8px}.workout-page__interval-pip{flex:1;border-radius:var(--radius-full);opacity:.3;transition:opacity var(--transition-fast)}.workout-page__interval-pip--active{opacity:1}.workout-page__interval-pip--completed{opacity:.6}.workout-page__interval-pip--run{background-color:var(--run-color)}.workout-page__interval-pip--walk{background-color:var(--walk-color)}.workout-page__interval-pip--warmup{background-color:var(--warmup-color)}.workout-page__footer{display:flex;justify-content:center;gap:16px;padding:24px;flex-wrap:wrap}.workout-page__control{min-width:100px;padding:12px 24px;font-size:1rem;font-weight:600;border-radius:var(--radius-lg);transition:all var(--transition-fast)}.workout-page__control--pause{background-color:#ffffff1a;color:var(--text-primary);border:1px solid rgba(255,255,255,.2)}.workout-page__control--pause:hover{background-color:#ffffff26}.workout-page__control--skip{background-color:transparent;color:var(--text-secondary)}.workout-page__control--skip:hover{color:var(--text-primary)}.workout-page__control--finish{background-color:var(--accent);color:#000}.workout-page__control--finish:hover{background-color:var(--accent-hover)}.workout-page__elapsed{position:absolute;bottom:80px;right:24px;font-family:var(--font-mono);font-size:.85rem;color:var(--text-muted)}.complete-page{display:flex;flex-direction:column;gap:24px;max-width:500px;margin:0 auto;width:100%}.complete-page__header{text-align:center}.complete-page__title{font-size:1.5rem;margin-bottom:4px}.complete-page__subtitle{color:var(--text-muted);font-size:.9rem}.complete-page__stats{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.complete-page__stat{text-align:center;padding:16px 8px;background-color:var(--bg-tertiary);border-radius:var(--radius-md)}.complete-page__stat-value{font-size:1.4rem;font-weight:700;font-family:var(--font-mono)}.complete-page__stat-value--run{color:var(--run-color)}.complete-page__stat-value--walk{color:var(--walk-color)}.complete-page__stat-value--total{color:var(--text-primary)}.complete-page__stat-label{font-size:.75rem;color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em;margin-top:2px}.complete-page__form{display:flex;flex-direction:column;gap:12px}.complete-page__label{font-size:.85rem;color:var(--text-secondary);font-weight:500}.complete-page__input{padding:10px 14px;background-color:var(--bg-tertiary);border:1px solid var(--border);border-radius:var(--radius-md);color:var(--text-primary);font-size:.95rem;outline:none;transition:border-color var(--transition-fast)}.complete-page__input:focus{border-color:var(--accent)}.complete-page__textarea{padding:10px 14px;background-color:var(--bg-tertiary);border:1px solid var(--border);border-radius:var(--radius-md);color:var(--text-primary);font-size:.95rem;outline:none;resize:vertical;min-height:80px;transition:border-color var(--transition-fast)}.complete-page__textarea:focus{border-color:var(--accent)}.complete-page__actions{display:flex;gap:12px}.history-page{display:flex;flex-direction:column;gap:24px}.history-page__stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:12px}.history-page__stat{text-align:center;padding:16px 8px;background-color:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius-md)}.history-page__stat-value{font-size:1.3rem;font-weight:700;color:var(--accent)}.history-page__stat-label{font-size:.75rem;color:var(--text-muted);text-transform:uppercase}.dashboard{display:flex;flex-direction:column;gap:24px}.dashboard__section{display:flex;flex-direction:column;gap:12px}.dashboard__section-title{font-size:.85rem;color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em;font-weight:600}@media(max-width:600px){.app-main{padding:16px}.app-header{padding:0 16px}.program-progress{grid-template-columns:repeat(4,1fr);gap:12px}.complete-page__stats{grid-template-columns:1fr}.workout-page__footer{padding:16px}.workout-page__control{min-width:80px;padding:10px 18px;font-size:.9rem}}