[hidden]{display:none!important}
:root{
  color-scheme:dark;
  --bg:#070b12;
  --panel:#111827;
  --panel-2:#172033;
  --panel-3:#0c1422;
  --line:rgba(255,255,255,.10);
  --text:#f8fafc;
  --muted:#9eacbf;
  --orange:#ff9d19;
  --orange-2:#ff6a00;
  --teal:#35d6c2;
  --danger:#ff6b6b;
  --shadow:0 18px 46px rgba(0,0,0,.28);
  font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif
}
*{box-sizing:border-box}
html{background:var(--bg)}
body{margin:0;min-height:100vh;color:var(--text);background:radial-gradient(circle at 80% -10%,rgba(255,157,25,.16),transparent 34%),linear-gradient(180deg,#08101d,#070b12 68%)}
button,input,select{font:inherit}
button{cursor:pointer}
h1,h2,h3,p{margin-top:0}
.topbar{width:min(1160px,calc(100% - 28px));margin:0 auto;padding:calc(22px + env(safe-area-inset-top)) 0 10px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.brand{display:flex;align-items:center;gap:12px}
.brand-mark{width:48px;height:48px;display:grid;place-items:center;border-radius:15px;background:linear-gradient(145deg,var(--orange),var(--orange-2));color:#231306;font-weight:950;font-size:1.15rem;box-shadow:0 10px 24px rgba(255,106,0,.22)}
h1{margin:0;font-size:1.7rem}
.kicker{margin:0 0 4px;color:var(--orange);font-size:.75rem;letter-spacing:.11em;text-transform:uppercase;font-weight:900}
.muted{color:var(--muted);line-height:1.55}
.compact{margin-bottom:0;font-size:.9rem}
.header-actions{display:flex;align-items:center;gap:10px}
.version{color:var(--muted);font-weight:800;font-size:.85rem}
.install-btn,.primary-btn,.inline-input button{border:0;border-radius:12px;background:linear-gradient(135deg,var(--orange),var(--orange-2));color:#241407;padding:11px 15px;font-weight:950;box-shadow:0 8px 20px rgba(255,106,0,.15)}
.page-shell{width:min(1160px,calc(100% - 28px));margin:16px auto 42px}
.card{border:1px solid var(--line);border-radius:22px;background:rgba(17,24,39,.94);box-shadow:var(--shadow)}
.hero{padding:22px;display:flex;justify-content:space-between;align-items:center;gap:20px}
.hero h2{font-size:clamp(1.55rem,4vw,2.45rem);margin-bottom:8px}
.hero p{margin-bottom:0}
.hero-stat{min-width:154px;border:1px solid rgba(53,214,194,.22);background:rgba(53,214,194,.08);padding:16px 18px;border-radius:18px;text-align:center}
.hero-stat span{display:block;font-size:2rem;font-weight:950;color:#78eadc}
.hero-stat small{color:var(--muted)}
.mode-tabs{margin-top:14px;padding:7px;display:grid;grid-template-columns:repeat(4,1fr);gap:6px}
.mode-tab{border:0;border-radius:13px;background:transparent;color:var(--muted);padding:12px 10px;font-weight:900}
.mode-tab.active{background:var(--panel-2);color:#fff;box-shadow:inset 0 0 0 1px rgba(255,157,25,.22)}
.mode-panel{display:none;margin-top:14px}
.mode-panel.active{display:block}
.favorites-card{padding:18px 20px}
.favorites-heading{display:grid;grid-template-columns:1fr auto;gap:20px;align-items:end}
.favorites-heading h3{margin-bottom:3px;font-size:1.25rem}
.favorite-save-row{display:flex;gap:9px;align-items:center}
.favorite-save-row input{width:220px;border:1px solid var(--line);border-radius:12px;background:#09121f;color:var(--text);padding:11px 12px;outline:none}
.favorite-save-row input:focus{border-color:rgba(255,157,25,.62);box-shadow:0 0 0 3px rgba(255,157,25,.10)}
.favorite-empty{margin-top:14px;border:1px dashed rgba(255,255,255,.12);border-radius:14px;padding:14px;color:var(--muted);text-align:center;font-size:.9rem}
.favorite-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:9px;margin-top:14px}
.favorite-card{display:flex;min-width:0;border:1px solid rgba(255,157,25,.18);border-radius:14px;background:#0b1421;overflow:hidden}
.favorite-apply{min-width:0;flex:1;border:0;background:transparent;color:var(--text);display:flex;align-items:center;gap:9px;text-align:left;padding:11px 10px}
.favorite-apply:hover{background:rgba(255,157,25,.07)}
.favorite-star{flex:0 0 auto;color:var(--orange);font-size:1.05rem}
.favorite-text{min-width:0;display:block}
.favorite-text strong{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-size:.91rem}
.favorite-text small{display:block;color:var(--muted);margin-top:3px;font-size:.72rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.favorite-delete{width:42px;flex:0 0 42px;border:0;border-left:1px solid var(--line);background:transparent;color:#8290a3;font-size:1.35rem}
.favorite-delete:hover{color:#fff;background:rgba(255,107,107,.12)}
.top-layout-gap{margin-top:14px}
.calculator-layout{display:grid;grid-template-columns:1.08fr .92fr;gap:14px}
.input-card,.answer-card,.chart-card{padding:21px}
.section-title{display:flex;align-items:center;justify-content:space-between;gap:12px}
.section-title>div{display:flex;align-items:center;gap:10px}
.section-title h3{margin:0}
.step{min-width:30px;height:30px;padding:0 8px;display:grid;place-items:center;border-radius:999px;background:rgba(255,157,25,.12);color:var(--orange);font-size:.76rem;font-weight:950;text-transform:uppercase}
.text-btn{border:0;background:transparent;color:var(--orange);font-weight:900}
.ratio-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:9px;margin-top:15px}
.ratio-btn{min-height:54px;border:1px solid var(--line);border-radius:15px;background:var(--panel-3);color:var(--text);font-weight:950}
.ratio-btn:hover,.ratio-btn.active,.container-btn:hover,.container-btn.active{border-color:rgba(255,157,25,.7);background:linear-gradient(145deg,rgba(255,157,25,.18),rgba(255,106,0,.10));color:#ffd598;transform:translateY(-1px)}
.top-gap{margin-top:22px}
.field-hint{margin:8px 0 0;color:var(--muted);font-size:.82rem}
.container-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:9px;margin-top:13px}
.container-btn{min-height:92px;border:1px solid var(--line);border-radius:16px;background:var(--panel-3);color:var(--text);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;transition:.15s ease}
.container-btn .can-icon{color:var(--orange);font-size:1.2rem;line-height:1}
.container-btn strong{font-size:1.14rem}
.container-btn small{color:var(--muted);font-size:.7rem;text-transform:uppercase;letter-spacing:.07em}
.container-btn.active small{color:#e7ba79}
.manual-gallons{margin-top:13px}
.manual-gallons label,.custom-box label,.field-grid label{display:block;color:var(--muted);font-size:.82rem;font-weight:800}
.manual-gallons input,.custom-box input,.field-grid input,.field-grid select{width:100%;margin-top:6px;border:1px solid var(--line);border-radius:12px;background:#09121f;color:var(--text);padding:12px 13px;outline:none}
.manual-gallons input:focus,.custom-box input:focus,.field-grid input:focus,.field-grid select:focus{border-color:rgba(255,157,25,.62);box-shadow:0 0 0 3px rgba(255,157,25,.10)}
.custom-box{margin-top:13px;padding:13px;border:1px dashed rgba(255,157,25,.30);border-radius:14px;background:rgba(255,157,25,.04)}
.inline-input{display:grid;grid-template-columns:1fr auto auto;gap:8px;align-items:center;margin-top:6px}
.inline-input input{margin:0}
.answer-card{position:relative;overflow:hidden;background:radial-gradient(circle at 90% 10%,rgba(53,214,194,.08),transparent 36%),rgba(17,24,39,.97)}
.answer-header-row{display:flex;justify-content:space-between;align-items:flex-start;gap:10px}
.current-mix-label{color:#dbe7f3;font-weight:850;font-size:.95rem;margin-top:7px}
.ready-badge{border:1px solid rgba(53,214,194,.25);border-radius:999px;background:rgba(53,214,194,.08);color:#7ce9dc;padding:7px 9px;font-size:.71rem;font-weight:900;white-space:nowrap}
.answer-main{margin:22px 0 4px;display:flex;align-items:baseline;gap:10px}
.answer-main span{font-size:clamp(3.7rem,9vw,6.4rem);font-weight:1000;letter-spacing:-.05em;line-height:.86;color:var(--orange)}
.answer-main small{font-size:1.2rem;color:var(--muted);font-weight:900}
.answer-secondary{font-size:1.55rem;color:#7ce9dc;font-weight:900}
.answer-summary{margin:17px 0;color:#c6d0dd;line-height:1.55}
.answer-mini-grid{display:grid;grid-template-columns:1fr 1fr;gap:9px;margin-top:18px}
.answer-mini-grid>div{border:1px solid var(--line);background:#0b1421;border-radius:13px;padding:12px}
.answer-mini-grid span{display:block;color:var(--muted);font-size:.76rem;margin-bottom:3px}
.answer-mini-grid strong{font-size:1.02rem}
.field-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:11px;margin-top:16px}
.chart-card{overflow:hidden}
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:15px;margin-top:16px}
table{width:100%;min-width:760px;border-collapse:collapse}
th,td{padding:13px 14px;border-bottom:1px solid var(--line);text-align:center}
th:first-child,td:first-child{text-align:left}
thead th{background:#0b1421;color:var(--muted);font-size:.8rem}
tbody tr:last-child td{border-bottom:0}
.safety-card{margin-top:14px;padding:15px 17px;display:flex;gap:8px;line-height:1.45;color:#c9d4df}
.safety-card strong{color:#ffd08a}
.toast{position:fixed;z-index:80;left:50%;bottom:calc(22px + env(safe-area-inset-bottom));transform:translateX(-50%);max-width:min(90vw,480px);border:1px solid rgba(53,214,194,.25);border-radius:999px;background:#101d2d;color:#eafdf9;padding:11px 16px;box-shadow:0 14px 38px rgba(0,0,0,.4);font-weight:800;font-size:.88rem;text-align:center}
.modal{position:fixed;inset:0;z-index:50;display:grid;place-items:center;padding:20px;background:rgba(0,0,0,.72)}
.modal-card{position:relative;width:min(440px,100%);border:1px solid var(--line);border-radius:20px;background:#121c2b;padding:23px;box-shadow:var(--shadow)}
.close-btn{position:absolute;right:10px;top:7px;border:0;background:transparent;color:#fff;font-size:1.8rem}
footer{text-align:center;padding:0 20px calc(28px + env(safe-area-inset-bottom));color:#64748b;font-size:.85rem}
@media(max-width:900px){.favorite-list{grid-template-columns:repeat(2,minmax(0,1fr))}.favorites-heading{grid-template-columns:1fr}.favorite-save-row{justify-content:flex-start}.favorite-save-row input{width:min(320px,100%)}}
@media(max-width:820px){.calculator-layout{grid-template-columns:1fr}.ratio-grid{grid-template-columns:repeat(3,1fr)}.field-grid{grid-template-columns:1fr}.hero-stat{min-width:130px}.mode-tabs{grid-template-columns:1fr 1fr}}
@media(max-width:600px){.favorite-save-row{display:grid;grid-template-columns:1fr}.favorite-save-row input{width:100%}.favorite-list{grid-template-columns:1fr}}
@media(max-width:520px){.topbar{align-items:flex-start}.header-actions{flex-direction:column;align-items:flex-end}.hero{align-items:flex-start;flex-direction:column}.hero-stat{width:100%}.ratio-grid{grid-template-columns:repeat(3,1fr)}.container-grid{grid-template-columns:repeat(2,1fr)}.input-card,.answer-card,.chart-card,.favorites-card{padding:16px;border-radius:18px}.page-shell{width:min(100% - 18px,1160px)}.topbar{width:min(100% - 18px,1160px)}.answer-main span{font-size:4.4rem}.safety-card{flex-direction:column}.mode-tab{padding:11px 7px;font-size:.86rem}.ready-badge{display:none}}