:root{color-scheme:dark;--bg:#10130f;--surface:#181d18;--surface-2:#202720;--line:#354035;--text:#f4f2e8;--muted:#aeb9aa;--gold:#e3b853;--green:#7fbd72;--shadow:0 20px 60px rgba(0,0,0,.32)}
*{box-sizing:border-box}
html{background:var(--bg);font-family:-apple-system,BlinkMacSystemFont,"SF Pro Display","Segoe UI",sans-serif;-webkit-text-size-adjust:100%}
body{margin:0;min-height:100svh;background:radial-gradient(circle at 50% -10%,#273322 0,transparent 42%),var(--bg);color:var(--text);-webkit-tap-highlight-color:transparent}
button,input{font:inherit}
button{touch-action:manipulation}
.app{width:min(100%,520px);min-height:100svh;margin:auto;padding:max(20px,env(safe-area-inset-top)) 20px max(24px,env(safe-area-inset-bottom));display:flex;flex-direction:column}
.topbar{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:14px}
.brand{display:flex;align-items:center;gap:10px;font-size:1.25rem;font-weight:750;letter-spacing:-.02em}.brand svg{width:30px;height:30px;fill:none;stroke:var(--gold);stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.progress-copy{text-align:right;line-height:1.08}.progress-copy strong{display:block;color:var(--gold);font-size:1rem}.progress-copy span{color:var(--muted);font-size:.75rem}
.progress-track{height:4px;background:#293029;border-radius:99px;overflow:hidden;margin-bottom:22px}.progress-track div{width:0;height:100%;background:linear-gradient(90deg,var(--green),var(--gold));transition:width .35s ease}
.mode-tabs{display:grid;grid-template-columns:1fr 1.35fr;gap:4px;margin-bottom:24px;padding:4px;border:1px solid var(--line);border-radius:15px;background:#131713}.mode-tab{height:42px;border:0;border-radius:11px;background:transparent;color:var(--muted);font-size:.88rem;font-weight:700;cursor:pointer}.mode-tab.active{background:var(--surface-2);color:var(--text);box-shadow:0 3px 12px rgba(0,0,0,.24)}.mode-panel[hidden]{display:none}
.finder label{display:block;margin-bottom:10px;color:var(--muted);font-size:.875rem;font-weight:650}.number-row{height:56px;display:grid;grid-template-columns:auto 1fr auto;align-items:center;background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:5px 5px 5px 16px;box-shadow:0 8px 24px rgba(0,0,0,.12)}
.number-prefix{color:var(--gold);font-weight:700}.number-row input{width:100%;min-width:0;border:0;outline:0;background:transparent;color:var(--text);font-size:1.2rem;font-weight:750;padding:10px 8px;font-variant-numeric:tabular-nums}.number-row button{height:44px;border:0;border-radius:12px;background:var(--gold);color:#19150b;padding:0 18px;font-weight:750;cursor:pointer}.number-row button:active{transform:scale(.97)}
#rangeHint{margin:8px 3px 18px;color:#7f8a7d;font-size:.75rem}.search-row{height:52px;display:grid;grid-template-columns:1fr auto;align-items:center;background:var(--surface);border:1px solid var(--line);border-radius:15px;padding:4px}.search-row:focus-within{border-color:#6e806b}.search-row input{width:100%;min-width:0;border:0;outline:0;background:transparent;color:var(--text);font-size:1rem;padding:10px 12px}.search-row input::placeholder{color:#788176}.search-row button{height:42px;border:0;border-radius:11px;background:var(--surface-2);color:var(--text);padding:0 16px;font-weight:700;cursor:pointer}.field-status{min-height:18px;margin:7px 3px 14px;color:var(--gold);font-size:.78rem}
.recipe-card{position:relative;overflow:hidden;min-height:260px;border:1px solid #3d493c;border-radius:24px;background:linear-gradient(150deg,rgba(38,48,37,.96),rgba(21,26,21,.98));box-shadow:var(--shadow);padding:20px 16px 24px}.recipe-card:before{content:"";position:absolute;width:180px;height:180px;left:50%;top:58%;transform:translate(-50%,-50%);background:radial-gradient(circle,rgba(227,184,83,.1),transparent 68%);pointer-events:none}
.recipe-meta{position:relative;display:flex;justify-content:space-between;align-items:center;color:var(--gold);font-size:.72rem;font-weight:800;letter-spacing:.13em}.seen-badge{color:var(--green);letter-spacing:0;text-transform:none;font-weight:650;opacity:0;transition:opacity .2s}.seen-badge.visible{opacity:1}
.formula{position:relative;display:grid;grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);grid-template-areas:"a plus b" "equal equal equal" "result result result";align-items:center;gap:8px 12px;margin-top:24px}.element{grid-area:a;min-width:0;text-align:center}.element:nth-of-type(2){grid-area:b}.element.result{grid-area:result;display:flex;align-items:center;justify-content:center;gap:12px;margin-top:2px}.element strong{display:block;margin-top:8px;font-size:clamp(.95rem,4vw,1.1rem);line-height:1.2;overflow-wrap:anywhere}.element.result strong{margin:0;color:#fff4cf;font-size:clamp(1.15rem,5vw,1.45rem)}
.operator{grid-area:plus;color:#788276;font-size:1.6rem;font-weight:300}.operator.equals{grid-area:equal;text-align:center;font-size:1.25rem;line-height:1}
.special-note{display:none;grid-area:equal;margin:6px 0 0;text-align:center;color:var(--muted);font-size:.9rem;line-height:1.4}.formula.special{grid-template-areas:"result result result" "equal equal equal";padding-top:22px}.formula.special .result{flex-direction:column}.formula.special .orb-result{width:76px;height:76px;background:radial-gradient(circle at 42% 32%,#fff3a6,#d4aa40 39%,#453712 76%)}.formula.special .special-note{display:block}
.orb{display:inline-grid;width:64px;height:64px;border:1px solid rgba(255,255,255,.16);border-radius:50%;box-shadow:inset 0 0 18px rgba(255,255,255,.08),0 8px 18px rgba(0,0,0,.25)}.orb-a{background:radial-gradient(circle at 35% 28%,#e0c07c,#78643a 45%,#292418 74%)}.orb-b{background:radial-gradient(circle at 58% 35%,#ffe181,#c64c22 44%,#3c1510 76%)}.orb-result{width:52px;height:52px;background:radial-gradient(circle at 42% 32%,#ffd878,#dc5a24 43%,#451a12 75%);box-shadow:0 0 24px rgba(224,112,40,.2)}
.study-row{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:18px}.study-button{height:50px;border:1px solid var(--line);border-radius:15px;background:transparent;color:var(--muted);font-weight:700;cursor:pointer}.study-button.learned{border-color:#4e6749;color:#b7ddaf;background:rgba(89,132,78,.1)}.study-button.active{outline:2px solid var(--gold);outline-offset:1px;color:var(--text)}.study-button.learned.active{outline-color:var(--green);background:rgba(89,132,78,.22)}.study-button:active{transform:scale(.98)}.study-icon{display:inline-grid;width:21px;height:21px;place-items:center;margin-right:7px;border:1px solid currentColor;border-radius:50%;font-size:.78rem}
.nav-row{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:12px;margin-top:14px}.nav-button{height:54px;border:1px solid var(--line);border-radius:16px;background:var(--surface);color:var(--text);font-weight:700;display:flex;align-items:center;justify-content:center;gap:8px;cursor:pointer}.nav-button.primary{background:var(--surface-2);border-color:#51634f}.nav-button:disabled{opacity:.35}.nav-button:active:not(:disabled){transform:scale(.98)}.position{color:var(--muted);font-size:.8rem;font-variant-numeric:tabular-nums;white-space:nowrap}
.path-finder label{display:block;margin-bottom:10px;color:var(--muted);font-size:.9rem;font-weight:700}.path-hint{margin:10px 3px 22px;color:#818c7f;font-size:.78rem;line-height:1.45}.path-result{padding-bottom:10px}.path-empty{min-height:210px;display:grid;place-content:center;text-align:center;border:1px dashed var(--line);border-radius:22px;color:var(--muted);padding:30px}.path-empty span{color:var(--gold);font-size:2rem}.path-empty p{max-width:260px;margin:10px auto 0;line-height:1.45}.path-heading{margin:0 0 6px;font-size:1.35rem}.path-summary{margin:0 0 18px;color:var(--muted);font-size:.85rem}.steps{display:grid;gap:10px;counter-reset:step}.step{position:relative;display:grid;grid-template-columns:34px 1fr auto;gap:10px;align-items:center;width:100%;min-height:70px;border:1px solid var(--line);border-radius:17px;background:var(--surface);color:var(--text);padding:10px 12px;text-align:left;cursor:pointer}.step-number{display:grid;width:30px;height:30px;place-items:center;border-radius:50%;background:#2b3529;color:var(--gold);font-weight:800;font-size:.8rem}.step-formula{min-width:0;line-height:1.35;font-size:.9rem;overflow-wrap:anywhere}.step-formula strong{color:#fff1c3}.step-ref{color:#7f897d;font-size:.72rem}.step.special-step{cursor:default}.path-done{padding:24px;border:1px solid #4c6248;border-radius:20px;background:rgba(86,129,75,.12);text-align:center}.path-done strong{display:block;color:#c4e6bc;font-size:1.15rem}.path-done span{display:block;margin-top:7px;color:var(--muted);font-size:.85rem}
.save-note{margin:auto 0 0;padding-top:28px;text-align:center;color:#7f8a7d;font-size:.75rem}.save-note span{color:var(--green);font-size:.55rem;vertical-align:2px}
@media (max-height:760px){.mode-tabs{margin-bottom:16px}.recipe-card{min-height:218px}.formula{margin-top:14px}.orb{width:52px;height:52px}.study-row{margin-top:12px}.nav-row{margin-top:10px}.save-note{padding-top:12px}}
@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}