:root{--bg-a: #efe4d1;--bg-b: #d7e2d4;--ink: #1a2d1e;--muted: #49604f;--card: rgba(255, 249, 238, .9);--card-border: rgba(57, 78, 65, .24);--accent: #265f43;--accent-soft: #e6f0ea;--input-bg: rgba(255, 255, 255, .72);--top-bar-bg: rgba(248, 243, 232, .78);--top-bar-border: rgba(57, 78, 65, .2);font-family:Trebuchet MS,Geneva,sans-serif;line-height:1.5;color:var(--ink);background:var(--bg-b)}[data-theme=dark]{--bg-a: #15241d;--bg-b: #0d1712;--ink: #e8f1ec;--muted: #b2c7bb;--card: rgba(16, 30, 23, .82);--card-border: rgba(120, 165, 140, .3);--accent: #86c9a7;--accent-soft: rgba(31, 59, 46, .9);--input-bg: rgba(13, 24, 18, .8);--top-bar-bg: rgba(15, 25, 20, .74);--top-bar-border: rgba(120, 165, 140, .3)}*{box-sizing:border-box}body{margin:0;min-height:100vh;background:radial-gradient(circle at 15% 10%,#f6efe2 0%,transparent 45%),radial-gradient(circle at 90% 80%,#cadccf 0%,transparent 40%),linear-gradient(160deg,var(--bg-a) 0%,var(--bg-b) 100%)}#root{min-height:100vh}.page-wrap{min-height:100vh;display:flex;flex-direction:column}.top-nav{position:sticky;top:0;z-index:10;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);background:var(--top-bar-bg);border-bottom:1px solid var(--top-bar-border)}.app-shell{position:relative;z-index:1;flex:1}.battery-card{border-color:var(--card-border);background:var(--card);box-shadow:0 22px 50px #1e35271f;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);animation:card-in .3s ease-out}.eyebrow{margin:0;letter-spacing:.16em;font-size:.75rem;color:var(--accent);font-weight:700}.muted{color:var(--muted)}.label{font-weight:700}.voltage-input{border-color:var(--card-border);background:var(--input-bg)}.ghost-btn,.preset-btn{border-color:var(--card-border);background:var(--accent-soft);color:var(--ink)}.lang-select{min-height:2rem;border-radius:.6rem;border:1px solid var(--card-border);background:var(--input-bg);color:var(--ink);padding:0 .55rem;font-size:.9rem}.install-btn{background:var(--accent);color:#f3f9f4}.type-select{width:100%;min-height:2.5rem;border-radius:.75rem;border:1px solid var(--card-border);background:var(--input-bg);color:var(--ink);padding:0 .75rem;font-size:1rem}.status-label{font-size:.88rem;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}.meter-track{overflow:hidden;border-radius:999px;border:1px solid rgba(41,73,53,.2);background:#ffffffbf}.meter-fill{transition:width .22s ease}.footnote{color:var(--muted)}.site-footer{border-top:1px solid var(--top-bar-border);background:var(--top-bar-bg)}.site-footer a{color:var(--accent);font-weight:700}@keyframes card-in{0%{opacity:0;transform:translateY(10px) scale(.99)}to{opacity:1;transform:translateY(0) scale(1)}}