:root,:root[data-theme=dark]{color-scheme:dark;--color-bg: #191919;--color-surface: #202020;--color-hover: #2A2A2A;--color-border: #2F2F2F;--color-text: #EBEBEB;--color-text-secondary: #9B9B9B;--color-accent: #529CCA;--font-sans: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;--radius-sm: 4px;--radius: 6px;--touch-min: 48px}:root[data-theme=light]{color-scheme:light;--color-bg: #FFFFFF;--color-surface: #F7F6F3;--color-hover: #EFEEEC;--color-border: #E9E9E7;--color-text: #37352F;--color-text-secondary: #787774;--color-accent: #2383E2}*{box-sizing:border-box}html,body{margin:0;padding:0}body{font-family:var(--font-sans);font-size:16px;line-height:1.5;color:var(--color-text);background-color:var(--color-bg);font-variant-numeric:tabular-nums;-webkit-font-smoothing:antialiased;text-align:left}#root{min-height:100dvh}h1{font-size:28px;font-weight:700;line-height:1.25;margin:0}h2{font-size:20px;font-weight:600;line-height:1.3;margin:0}p{margin:0}button{font-family:inherit;font-size:inherit;color:inherit}.app-shell{min-height:100dvh;display:flex;flex-direction:column}.app-content{flex:1;width:100%;max-width:480px;margin:0 auto;padding:24px 20px 96px}.screen{display:flex;flex-direction:column;gap:8px}.screen-subtitle{color:var(--color-text-secondary)}.bottom-nav{position:fixed;bottom:0;left:0;right:0;display:flex;background-color:var(--color-surface);border-top:1px solid var(--color-border);padding-bottom:env(safe-area-inset-bottom,0px)}.bottom-nav-item{flex:1;min-height:56px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;padding:8px 4px;background:none;border:none;color:var(--color-text-secondary);font-size:12px;line-height:1.2;cursor:pointer}.bottom-nav-item:hover{background-color:var(--color-hover)}.bottom-nav-item.active{color:var(--color-accent)}