:root{--font:-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;--radius:16px;--radius-sm:10px;--gap:12px}.app{flex-direction:column;min-height:100vh;display:flex}.app.dark{--bg:#0f1115;--surface:#1a1d24;--surface-2:#232833;--text:#f2f4f8;--text-dim:#9aa3b2;--border:#2c333f;--accent:#5b8cff;--accent-soft:#5b8cff24;color:var(--text);background:var(--bg)}.app.light{--bg:#f4f6fa;--surface:#fff;--surface-2:#eef1f7;--text:#15181f;--text-dim:#68707e;--border:#e3e8f0;--accent:#2f6bff;--accent-soft:#2f6bff1a;color:var(--text);background:var(--bg)}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}body{font-family:var(--font);margin:0;font-size:16px;line-height:1.5}.header{justify-content:space-between;align-items:center;padding:16px 20px 8px;display:flex}.home-link{border-radius:var(--radius-sm);border:1px solid var(--border);background:var(--surface);width:fit-content;color:var(--accent);align-self:flex-start;margin:12px 20px 0;padding:8px 14px;font-size:13px;font-weight:600;text-decoration:none;display:inline-block}.home-link:hover{filter:brightness(1.08)}.brand{align-items:baseline;gap:10px;display:flex}.brand-mark{color:var(--accent);font-size:26px;line-height:1}.brand h1{letter-spacing:-.02em;margin:0;font-size:22px;font-weight:700}.brand-tag{color:var(--text-dim);font-size:12px}.icon-btn{background:var(--surface-2);color:var(--text);border:1px solid var(--border);border-radius:var(--radius-sm);cursor:pointer;width:42px;height:42px;font-size:18px}.icon-btn:hover{filter:brightness(1.08)}.main{flex:1;width:100%;max-width:560px;margin:0 auto;padding:8px 20px 24px}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);gap:var(--gap);flex-direction:column;margin-bottom:16px;padding:20px;display:flex;box-shadow:0 8px 30px #00000014}.segmented{background:var(--surface-2);border-radius:var(--radius-sm);gap:2px;padding:3px;display:flex}.seg{color:var(--text-dim);cursor:pointer;background:0 0;border:none;border-radius:8px;flex:1;padding:10px;font-size:14px;font-weight:500}.seg-active{background:var(--accent);color:#fff}.field-grid{grid-template-columns:repeat(3,1fr);gap:10px;display:grid}.field{flex-direction:column;gap:4px;display:flex}.field-label{text-transform:uppercase;letter-spacing:.08em;color:var(--text-dim);font-size:12px;font-weight:600}.field input{border-radius:var(--radius-sm);border:1px solid var(--border);background:var(--surface-2);width:100%;color:var(--text);font-variant-numeric:tabular-nums;outline:none;padding:10px 12px;font-size:16px;font-weight:600}.field input:focus{border-color:var(--accent)}.stepper-row{flex-wrap:wrap;gap:16px;display:flex}.stepper{align-items:center;gap:8px;display:flex}.step-btn{border:1px solid var(--border);background:var(--surface-2);width:32px;height:32px;color:var(--text);cursor:pointer;border-radius:8px;font-size:16px}.step-btn:hover{filter:brightness(1.08)}.step-value{text-align:center;font-variant-numeric:tabular-nums;min-width:20px;font-weight:700}.check-row{justify-content:space-between;align-items:center;gap:10px;display:flex}.switch{appearance:none;background:var(--surface-2);border:1px solid var(--border);cursor:pointer;border-radius:999px;flex:none;width:48px;height:28px;transition:background .15s;position:relative}.switch:after{content:"";background:var(--text-dim);border-radius:50%;width:22px;height:22px;transition:transform .15s,background .15s;position:absolute;top:2px;left:2px}.switch:checked{background:var(--accent);border-color:var(--accent)}.switch:checked:after{background:#fff;transform:translate(20px)}.section-title{color:var(--text-dim);text-transform:uppercase;letter-spacing:.08em;margin:0;font-size:15px;font-weight:700}.sub-title{color:var(--text-dim);text-transform:uppercase;letter-spacing:.08em;margin:4px 0 0;font-size:13px;font-weight:700}.big-result{flex-direction:column;align-items:center;gap:4px;padding:8px 0;display:flex}.big-num{letter-spacing:-.02em;font-variant-numeric:tabular-nums;font-size:36px;font-weight:700}.big-sub{color:var(--text-dim);font-size:13px}.need-row{gap:10px;display:flex}.need-item{border-radius:var(--radius-sm);background:var(--surface-2);flex-direction:column;flex:1;align-items:center;gap:4px;padding:12px;display:flex}.need-label{color:var(--text-dim);text-transform:uppercase;letter-spacing:.08em;font-size:12px}.need-item strong{font-variant-numeric:tabular-nums;font-size:22px}.can-list{flex-direction:column;margin:0;padding:0;list-style:none;display:flex}.can-row{border-bottom:1px solid var(--border);justify-content:space-between;align-items:baseline;padding:10px 0;font-size:15px;font-weight:600;display:flex}.can-row:last-child{border-bottom:none}.can-liters{color:var(--text-dim);font-variant-numeric:tabular-nums;font-size:13px;font-weight:500}.hint{text-align:center;color:var(--text-dim);margin-top:16px;font-size:13px}.footer{text-align:center;color:var(--text-dim);padding:16px;font-size:12px}