:root{--bg: #0b0d12;--fg: #e7ecf3;--muted: #8590a3;--accent: #6ea8ff;--card: #131722;--border: #232938;--input-bg: #1c212e;--input-border: #2d3548}@media(prefers-color-scheme:light){:root{--bg: #f7f8fb;--fg: #181c25;--muted: #5a6477;--accent: #1f6feb;--card: #ffffff;--border: #e2e6ee;--input-bg: #f0f2f7;--input-border: #d1d9e6}}*{box-sizing:border-box}html,body,#root{margin:0;height:100%}body{background:var(--bg);color:var(--fg);font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;-webkit-font-smoothing:antialiased;padding:env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left)}.page{min-height:100%;display:flex;flex-direction:column;align-items:center;padding:32px 16px}.container{max-width:600px;width:100%;display:flex;flex-direction:column;gap:24px}.card{background:var(--card);border:1px solid var(--border);border-radius:20px;padding:24px;box-shadow:0 10px 30px #0000001a}.header{text-align:center;margin-bottom:8px}.header h1{font-size:clamp(1.5rem,5vw,2rem);margin:0;background:linear-gradient(135deg,var(--fg) 0%,var(--accent) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent}.header p{color:var(--muted);margin-top:8px;font-size:14px}.category-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:12px;margin-bottom:24px}.category-btn{background:var(--input-bg);border:1px solid var(--input-border);color:var(--fg);padding:12px;border-radius:12px;cursor:pointer;transition:all .2s ease;display:flex;flex-direction:column;align-items:center;gap:8px;font-size:14px;min-height:44px}.category-btn:hover{border-color:var(--accent);background:var(--card)}.category-btn.active{background:var(--accent);color:#fff;border-color:var(--accent)}.converter-grid{display:flex;flex-direction:column;gap:20px}.input-group{display:flex;flex-direction:column;gap:8px}.input-group label{font-size:13px;font-weight:600;color:var(--muted);padding-left:4px}.input-wrapper{position:relative;display:flex;align-items:center}input,select{width:100%;background:var(--input-bg);border:1px solid var(--input-border);color:var(--fg);padding:12px 16px;border-radius:12px;font-size:16px;min-height:44px;transition:border-color .2s ease}input:focus,select:focus{outline:none;border-color:var(--accent);background:var(--card)}.swap-btn{align-self:center;background:var(--input-bg);border:1px solid var(--input-border);color:var(--muted);width:40px;height:40px;border-radius:50%;display:grid;place-items:center;cursor:pointer;transition:all .2s ease}.swap-btn:hover{color:var(--accent);border-color:var(--accent);transform:rotate(180deg)}.result-area{margin-top:12px;padding:16px;background:var(--input-bg);border-radius:12px;text-align:center}.result-value{font-size:24px;font-weight:700;color:var(--accent);word-break:break-all}.result-unit{font-size:14px;color:var(--muted);margin-top:4px}@media(min-width:640px){.converter-grid{flex-direction:row;align-items:flex-end}.input-group{flex:1}.swap-btn{margin-bottom:2px}}@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}