:root{--bg: #0a0a0a;--surface: #111111;--surface-raised: #181818;--border: rgba(255,255,255,.08);--border-mid: rgba(255,255,255,.13);--text: #ffffff;--text-muted: #a0a0a0;--text-dim: #555555;--accent: #FF3366;--accent-hover: #e62d5a;--accent-subtle: rgba(255,51,102,.1);--accent-subtle-hover: rgba(255,51,102,.18);--blue: #80acd4;--blue-subtle: rgba(128,172,212,.1);--green: #7ec87e;--green-subtle: rgba(126,200,126,.1);--mono: "IBM Plex Mono", monospace;--sans: "Inter", system-ui, sans-serif}.back-link{display:inline-block;font-size:.9rem;color:#a0a0a0;margin-bottom:24px;transition:color .2s;text-decoration:none}.back-link:hover{color:#fff}html{scroll-behavior:smooth}body{font-family:var(--sans);background:var(--bg);color:var(--text);font-size:15px;line-height:1.6;-webkit-font-smoothing:antialiased;min-height:100vh;display:flex;flex-direction:column}.page-main{flex:1;padding-top:80px;padding-bottom:60px;padding-inline:24px}.page-heading{max-width:800px;margin-inline:auto;margin-bottom:32px}.page-heading-content{text-align:center}.page-heading h1{font-size:clamp(2.5rem,5vw,4rem);font-weight:700;line-height:1.05;letter-spacing:-.02em;margin-bottom:16px}.page-heading p{font-size:1.1rem;color:var(--text-muted);max-width:600px;margin-inline:auto}.unit-toggle{display:flex;align-items:center;background:#0d0d0d;border:1px solid var(--border-mid);border-radius:6px;overflow:hidden;flex-shrink:0}.unit-btn{font-family:var(--sans);font-size:10px;font-weight:700;letter-spacing:.8px;text-transform:uppercase;background:transparent;border:none;color:var(--text-dim);padding:6px 14px;line-height:1;cursor:pointer;transition:all .15s;position:relative}.unit-btn:not(:last-child):after{content:"";position:absolute;right:0;top:20%;bottom:20%;width:1px;background:var(--border-mid)}.unit-btn:hover{color:var(--text-muted)}.unit-btn.active{background:var(--accent);color:#fff}.card{max-width:800px;margin:0 auto 24px;background:var(--surface);border:1px solid var(--border);border-radius:12px;overflow:hidden;box-shadow:0 32px 64px #0006}.card-header{background:#0d0d0d;border-bottom:1px solid var(--border);padding:16px 24px;display:flex;align-items:center;justify-content:space-between;gap:12px}.card-header-label{font-family:var(--mono);font-size:11px;font-weight:600;letter-spacing:1px;text-transform:uppercase;color:var(--text-dim)}.card-body{padding:24px}.fields-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:16px}.fields-grid.cols-4{grid-template-columns:1fr 1fr 1fr 1fr}@media (max-width: 640px){.fields-grid.cols-4{grid-template-columns:1fr 1fr}}.field label{display:block;font-family:var(--sans);font-size:11px;font-weight:600;letter-spacing:.5px;text-transform:uppercase;color:var(--text-dim);margin-bottom:8px}.field input{width:100%;background:#0d0d0d;border:1px solid var(--border-mid);border-radius:6px;color:var(--text);font-family:var(--mono);font-size:15px;font-weight:500;padding:10px 14px;outline:none;transition:all .15s}.field input:focus{border-color:var(--accent);background:#111;box-shadow:0 0 0 1px var(--accent)}.field input.adjusted{border-color:#ff336680;background:#ff33660a}.field-note{font-size:10px;color:var(--text-dim);margin-top:6px;font-family:var(--sans);min-height:15px}.card-section-divider{border-top:1px solid var(--border);padding:14px 24px 0;margin-bottom:-6px;display:flex;align-items:center;justify-content:space-between}.card-section-label{font-family:var(--sans);font-size:11px;font-weight:700;letter-spacing:.8px;text-transform:uppercase}.card-section-label.h{color:var(--blue)}.card-section-label.v{color:var(--green)}.field-pt-hint{font-family:var(--sans);font-size:10px;color:var(--blue);margin-top:4px}.info{max-width:800px;margin:0 auto 28px;background:var(--surface-raised);border-left:3px solid var(--accent);border-radius:0 8px 8px 0;padding:16px 20px;font-size:14px;color:var(--text-muted);line-height:1.7}.info code{font-family:var(--mono);font-size:12px;background:#ffffff0f;padding:2px 6px;border-radius:4px;color:var(--text)}.actions{display:flex;gap:12px;margin-top:24px}.btn-calc{font-family:var(--sans);font-size:14px;font-weight:600;letter-spacing:.2px;background:var(--accent);border:none;border-radius:6px;color:#fff;padding:12px 28px;cursor:pointer;transition:all .15s}.btn-calc:hover{background:var(--accent-hover);transform:translateY(-1px)}.btn-calc:active{transform:translateY(0)}.btn-reset{font-family:var(--sans);font-size:14px;font-weight:500;background:transparent;border:1px solid var(--border-mid);border-radius:6px;color:var(--text-dim);padding:12px 20px;cursor:pointer;transition:all .15s}.btn-reset:hover{color:var(--text-muted);border-color:#fff3}.btn-download-sm{display:inline-flex;align-items:center;gap:8px;font-family:var(--sans);font-size:14px;font-weight:600;background:#ffffff0d;border:1px solid rgba(255,255,255,.2);border-radius:6px;color:var(--text);padding:11px 20px;cursor:pointer;transition:all .15s;text-decoration:none}.btn-download-sm:hover{background:#ffffff1a;border-color:#fff6;transform:translateY(-1px)}.apple-icon-sm{width:14px;height:14px}.result-card{max-width:800px;margin:0 auto 32px;background:var(--surface);border:1px solid rgba(255,51,102,.25);border-radius:12px;overflow:hidden;display:none;box-shadow:0 40px 80px #00000080}.result-card.show{display:block}.result-header{background:#ff336614;border-bottom:1px solid rgba(255,51,102,.15);padding:16px 24px}.result-header-label{font-family:var(--mono);font-size:11px;font-weight:700;letter-spacing:1.2px;text-transform:uppercase;color:var(--accent)}.result-body{padding:24px}.result-unit-row{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-bottom:32px}@media (max-width: 640px){.result-unit-row{grid-template-columns:1fr}}.result-unit{background:var(--surface-raised);border:1px solid var(--border-mid);border-radius:8px;padding:20px}.result-unit-axis{font-family:var(--mono);font-size:10px;font-weight:700;letter-spacing:1px;text-transform:uppercase;margin-bottom:8px}.result-unit-axis.h{color:var(--blue)}.result-unit-axis.v{color:var(--green)}.result-unit-value{font-family:var(--mono);font-size:32px;font-weight:600;color:var(--text);letter-spacing:-.02em;margin-bottom:6px}.result-unit-sub{font-family:var(--mono);font-size:11px;color:var(--text-dim);line-height:1.5}.breakdown-label{font-family:var(--mono);font-size:10px;font-weight:700;letter-spacing:1.2px;text-transform:uppercase;color:var(--text-dim);margin-bottom:16px}.breakdown{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-bottom:24px}@media (max-width: 640px){.breakdown{grid-template-columns:1fr}}.breakdown-axis{font-family:var(--mono);font-size:10px;font-weight:700;letter-spacing:1px;text-transform:uppercase;margin-bottom:12px;padding-bottom:8px;border-bottom:1px solid var(--border)}.breakdown-axis.h{color:var(--blue)}.breakdown-axis.v{color:var(--green)}.breakdown-row{display:flex;justify-content:space-between;align-items:baseline;padding:8px 0;border-bottom:1px solid var(--border);gap:12px}.breakdown-row:last-child{border-bottom:none}.breakdown-name{font-size:13px;color:var(--text-muted)}.breakdown-val{font-family:var(--mono);font-size:13px;color:var(--text);font-weight:500;white-space:nowrap}.breakdown-val .units{font-size:11px;color:var(--text-dim);margin-left:6px}.val-entered{display:block;font-size:11px;color:var(--text-dim);margin-top:4px;font-family:var(--mono)}.grid-vis-wrap{margin-top:24px;padding-top:24px}.grid-vis-label{font-family:var(--sans);font-size:10px;font-weight:700;letter-spacing:1.2px;text-transform:uppercase;color:var(--text-dim);margin-bottom:16px}.grid-vis-container{position:relative;width:100%;background:#0d0d0d;border:1px solid var(--border);border-radius:8px;overflow:hidden}canvas#gridCanvas{display:block;width:100%;height:auto}.error-box{max-width:800px;margin:0 auto 24px;background:#d450501a;border:1px solid rgba(212,80,80,.25);border-radius:8px;padding:16px;font-size:13px;font-family:var(--mono);color:#d48080;display:none}.error-box.show{display:block}.export-group-right{display:flex;gap:16px;align-items:flex-end}@media (max-width: 600px){.export-group-right{flex-direction:column;align-items:flex-end;width:100%}}