:root{--bg-color: #121212;--surface-color: #1e1e1e;--primary-color: #00e676;--accent-color: #2979ff;--text-color: #ffffff;--text-secondary: #b0bec5;--glass-bg: rgba(255, 255, 255, .05);--glass-border: rgba(255, 255, 255, .1);--bubble-color: #00e676;--bubble-shadow: 0 0 10px rgba(0, 230, 118, .5);--danger-color: #ff1744}*{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent}body{font-family:Inter,system-ui,-apple-system,sans-serif;background-color:var(--bg-color);color:var(--text-color);overflow:hidden;height:100vh;width:100vw;display:flex;flex-direction:column}#app{flex:1;display:flex;flex-direction:column;position:relative;height:100%}nav{display:flex;justify-content:space-around;align-items:center;padding:1rem;background:var(--surface-color);border-top:1px solid var(--glass-border);position:fixed;bottom:0;width:100%;z-index:100;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}nav a{color:var(--text-secondary);text-decoration:none;font-size:.8rem;display:flex;flex-direction:column;align-items:center;gap:.3rem;transition:color .3s}nav a.active{color:var(--primary-color)}nav a svg{width:24px;height:24px;fill:currentColor}main{flex:1;display:flex;justify-content:center;align-items:center;padding-bottom:80px;position:relative}.bubble-level-container{display:flex;flex-direction:column;align-items:center;gap:2rem;width:100%;max-width:400px}.level-wrapper{position:relative;display:flex;flex-direction:column;align-items:center;gap:1.5rem}.circular-level{width:200px;height:200px;border-radius:50%;background:var(--surface-color);border:2px solid var(--glass-border);position:relative;box-shadow:inset 0 0 20px #00000080;overflow:hidden}.center-mark{position:absolute;top:50%;left:50%;width:4px;height:4px;background:var(--text-secondary);border-radius:50%;transform:translate(-50%,-50%);z-index:2}.ring{position:absolute;top:50%;left:50%;border:1px solid var(--glass-border);border-radius:50%;transform:translate(-50%,-50%);pointer-events:none}.ring-1{width:50px;height:50px}.ring-2{width:100px;height:100px}.bubble{width:40px;height:40px;background:var(--bubble-color);border-radius:50%;position:absolute;top:50%;left:50%;margin-top:-20px;margin-left:-20px;box-shadow:var(--bubble-shadow),inset -5px -5px 10px #0003;transition:transform .1s cubic-bezier(.2,.8,.2,1);will-change:transform}.tubular-level-x,.tubular-level-y{width:200px;height:40px;background:var(--surface-color);border-radius:20px;border:1px solid var(--glass-border);position:relative;overflow:hidden;box-shadow:inset 0 0 10px #00000080}.tubular-level-y{transform:rotate(-90deg);position:absolute;right:-80px;top:80px;width:200px;display:none}.tubular-level-x{margin-top:1rem}.tube-bubble{width:30px;height:30px;background:var(--bubble-color);border-radius:50%;position:absolute;top:50%;left:50%;margin-top:-15px;margin-left:-15px;box-shadow:var(--bubble-shadow);transition:transform .1s ease-out}.tube-lines{position:absolute;top:0;left:50%;width:40px;height:100%;border-left:1px solid var(--glass-border);border-right:1px solid var(--glass-border);transform:translate(-50%)}.readout{display:flex;gap:2rem;font-family:Roboto Mono,monospace;font-size:1.2rem;color:var(--primary-color)}.action-btn{background:var(--glass-bg);border:1px solid var(--glass-border);color:var(--text-color);padding:.8rem 1.5rem;border-radius:8px;font-size:1rem;cursor:pointer;transition:background .3s;-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px)}.action-btn:hover{background:#ffffff1a}.action-btn.secondary{background:#ff174433;border-color:#ff174480;color:#ff8a80}.is-level .bubble,.is-level .tube-bubble{background:#0f0;box-shadow:0 0 15px #0f0}.clinometer-container{display:flex;justify-content:center;align-items:center;height:100%}.dial{width:280px;height:280px;border-radius:50%;background:var(--surface-color);border:4px solid var(--glass-border);position:relative;display:flex;justify-content:center;align-items:center;box-shadow:0 10px 30px #00000080}.needle{width:4px;height:120px;background:var(--danger-color);position:absolute;bottom:50%;left:50%;transform-origin:bottom center;transform:translate(-50%);z-index:2;border-radius:2px}.center-knob{width:20px;height:20px;background:var(--text-secondary);border-radius:50%;position:absolute;z-index:3}.readout-large{position:absolute;bottom:60px;font-size:2.5rem;font-weight:700;font-family:Roboto Mono,monospace}.camera-level-container{position:fixed;top:0;left:0;width:100%;height:100%;background:#000;z-index:200}#camera-feed{width:100%;height:100%;object-fit:cover}.overlay{position:absolute;top:0;left:0;width:100%;height:100%;pointer-events:none}.crosshair{position:absolute;top:50%;left:50%;width:20px;height:20px;border:2px solid rgba(255,255,255,.5);border-radius:50%;transform:translate(-50%,-50%)}.horizon-line{position:absolute;top:50%;left:50%;width:80%;height:2px;background:#f00c;transform:translate(-50%,-50%);transition:transform .1s linear,background .3s}.horizon-line.level{background:#00e676;height:4px;box-shadow:0 0 10px #00e676}.camera-readout{position:absolute;top:20px;left:50%;transform:translate(-50%);background:#00000080;padding:.5rem 1rem;border-radius:20px;font-family:Roboto Mono,monospace;font-size:1.5rem}#close-camera{position:absolute;bottom:40px;left:50%;transform:translate(-50%);pointer-events:auto;z-index:201}#start-overlay{position:fixed;top:0;left:0;width:100%;height:100%;background:var(--bg-color);z-index:1000;display:flex;flex-direction:column;justify-content:center;align-items:center;gap:1rem}#start-overlay.hidden{display:none}.logo{font-size:3rem;margin-bottom:1rem}h1{font-size:1.5rem;margin-bottom:.5rem}p{color:var(--text-secondary);margin-bottom:2rem;text-align:center;max-width:80%}