/* BrewMath — Warm amber/malt on dark grain */
:root{--bg-primary:#1a1008;--bg-surface:#221810;--bg-hover:#2e2218;--bg-input:#1a1208;--text-primary:#f0e8d8;--text-secondary:#c0a880;--text-muted:#7a6848;--accent:#d97706;--accent-hover:#b45309;--accent-glow:rgba(217,119,6,0.15);--accent-glow-strong:rgba(217,119,6,0.3);--border:rgba(192,168,128,0.1);--border-hover:rgba(217,119,6,0.4);--success:#22c55e;--success-bg:rgba(34,197,94,0.12);--warning:#f59e0b;--warning-bg:rgba(245,158,11,0.12);--error:#ef4444;--error-bg:rgba(239,68,68,0.12);--radius:12px;--radius-sm:8px;--shadow:0 2px 12px rgba(0,0,0,0.4);--transition:0.2s ease}
[data-theme="light"]{--bg-primary:#fdf8f0;--bg-surface:#fff;--bg-hover:#f5ebe0;--bg-input:#faf5ec;--text-primary:#2a1a08;--text-secondary:#5a4020;--text-muted:#8a7050;--border:rgba(42,26,8,0.1);--shadow:0 2px 12px rgba(0,0,0,0.06)}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}body{font-family:'Inter',-apple-system,BlinkMacSystemFont,sans-serif;background:var(--bg-primary);color:var(--text-secondary);line-height:1.6;min-height:100vh;-webkit-font-smoothing:antialiased}.container{max-width:1100px;margin:0 auto;padding:0 1rem}
.site-header{background:linear-gradient(135deg,#221810 0%,#1a1008 100%);border-bottom:1px solid var(--border);padding:2rem 0 1.5rem;text-align:center}.header-inner{display:flex;flex-direction:column;align-items:center;gap:0.25rem}.brand{display:flex;align-items:center;gap:0.75rem}.brand-icon{font-size:2rem}.brand-name{font-family:'Outfit',sans-serif;font-weight:800;font-size:clamp(1.8rem,5vw,2.5rem);color:var(--text-primary);letter-spacing:-0.02em}.brand-tagline{font-family:'Outfit',sans-serif;font-weight:600;font-size:1rem;color:var(--accent);margin-top:0.25rem}.brand-subtitle{font-size:0.9rem;color:var(--text-muted);max-width:520px;margin-top:0.25rem}
.privacy-badge{display:inline-flex;align-items:center;gap:0.5rem;background:var(--accent-glow);border:1px solid rgba(217,119,6,0.2);border-radius:999px;padding:0.4rem 1rem;font-size:0.8rem;font-weight:500;color:var(--accent);margin:1.5rem auto 1rem;text-align:center;width:fit-content}
.app-grid{display:grid;grid-template-columns:1fr;gap:1.5rem;margin-top:1rem}@media(min-width:768px){.app-grid{grid-template-columns:1fr 1fr}}
.panel{background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--radius);padding:1.5rem;box-shadow:var(--shadow)}.panel-title{font-family:'Outfit',sans-serif;font-weight:700;font-size:1.35rem;color:var(--text-primary);margin-bottom:1.25rem}
.input-group{margin-bottom:1.25rem}.input-group--half{flex:1;min-width:0}.input-row{display:flex;gap:1rem;margin-bottom:1.25rem}label{display:block;font-size:0.85rem;font-weight:600;color:var(--text-primary);margin-bottom:0.4rem}
input[type="number"],input[type="text"],select{width:100%;padding:0.65rem 0.85rem;background:var(--bg-input);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text-primary);font-family:'JetBrains Mono',monospace;font-size:0.95rem;transition:border-color var(--transition),box-shadow var(--transition);appearance:none}input[type="text"]{font-family:'Inter',sans-serif;font-size:0.82rem}input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-glow)}
.section-subtitle{font-family:'Outfit',sans-serif;font-weight:700;font-size:1.1rem;color:var(--text-primary);margin-bottom:0.75rem}
/* Grain/Hop rows */
.grain-row,.hop-row{display:flex;gap:0.4rem;margin-bottom:0.4rem;align-items:center}.grain-row input,.hop-row input{padding:0.5rem 0.5rem;font-size:0.8rem}.grain-name,.hop-name{flex:2;min-width:0}.grain-weight,.hop-oz{flex:0.8}.grain-ppg,.hop-aa{flex:0.7}.grain-srm,.hop-time{flex:0.7}
.btn-remove-row{background:none;border:none;color:var(--error);cursor:pointer;font-size:1rem;padding:0.25rem;opacity:0.6}.btn-remove-row:hover{opacity:1}
.btn-add-grain,.btn-add-hop{font-size:0.8rem;font-weight:600;color:var(--accent);background:none;border:1px dashed var(--border);border-radius:var(--radius-sm);padding:0.4rem 1rem;cursor:pointer;transition:all var(--transition)}.btn-add-grain:hover,.btn-add-hop:hover{border-color:var(--accent);background:var(--accent-glow)}
.btn-calculate{width:100%;padding:0.85rem;font-size:1rem;font-weight:700;background:linear-gradient(135deg,var(--accent),var(--accent-hover));border:none;border-radius:var(--radius-sm);color:#1a1200;cursor:pointer;transition:all var(--transition);font-family:'Inter',sans-serif}.btn-calculate:hover{transform:translateY(-1px);box-shadow:0 4px 16px rgba(217,119,6,0.35)}
.error-message{background:var(--error-bg);border:1px solid rgba(239,68,68,0.3);border-radius:var(--radius-sm);padding:0.75rem 1rem;font-size:0.85rem;color:var(--error);margin-bottom:1rem}.hidden{display:none!important}
.summary-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:0.75rem;margin-bottom:1.25rem}@media(min-width:600px){.summary-grid{grid-template-columns:repeat(3,1fr)}}
.summary-card{background:var(--bg-hover);border:1px solid var(--border);border-radius:var(--radius-sm);padding:0.85rem 0.75rem;text-align:center}.summary-card:hover{border-color:var(--border-hover)}.summary-card--highlight{border-color:var(--accent);background:var(--accent-glow)}
.summary-label{display:block;font-size:0.7rem;font-weight:600;text-transform:uppercase;letter-spacing:0.06em;color:var(--text-muted);margin-bottom:0.35rem}.summary-value{display:block;font-family:'JetBrains Mono',monospace;font-size:1.15rem;font-weight:500;color:var(--text-primary)}
.color-swatch-wrap{margin-bottom:1.25rem}.color-swatch{height:48px;border-radius:var(--radius-sm);transition:background 0.5s ease;border:1px solid var(--border)}
.water-grid{display:grid;grid-template-columns:1fr 1fr;gap:0.5rem;margin-bottom:1.25rem}.water-item{background:var(--bg-hover);border:1px solid var(--border);border-radius:var(--radius-sm);padding:0.6rem 0.75rem;display:flex;flex-direction:column}.water-label{font-size:0.7rem;font-weight:600;text-transform:uppercase;color:var(--text-muted);letter-spacing:0.04em}.water-value{font-family:'JetBrains Mono',monospace;font-size:0.95rem;color:var(--text-primary);margin-top:0.2rem}
.export-row{display:flex;gap:0.75rem;margin-bottom:1.25rem}.btn-export{display:inline-flex;align-items:center;gap:0.4rem;padding:0.5rem 1rem;font-size:0.8rem;font-weight:600;background:var(--bg-hover);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text-secondary);cursor:pointer;transition:all var(--transition)}.btn-export:hover{border-color:var(--accent);color:var(--accent);background:var(--accent-glow)}
.how-it-works{margin-top:2.5rem;padding:2rem 0}.how-title{text-align:center;margin-bottom:1.5rem}.how-grid{display:grid;grid-template-columns:1fr;gap:1rem}@media(min-width:600px){.how-grid{grid-template-columns:repeat(2,1fr)}}@media(min-width:900px){.how-grid{grid-template-columns:repeat(4,1fr)}}
.how-card{background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--radius);padding:1.25rem;text-align:center;transition:border-color var(--transition),transform var(--transition)}.how-card:hover{border-color:var(--border-hover);transform:translateY(-2px)}.how-icon{font-size:1.8rem;display:block;margin-bottom:0.75rem}.how-card-title{font-family:'Outfit',sans-serif;font-weight:700;font-size:1rem;color:var(--text-primary);margin-bottom:0.5rem}.how-card p{font-size:0.82rem;color:var(--text-muted);line-height:1.5}
.seo-card{background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--radius);padding:1.5rem;margin-top:1.5rem}.seo-card h2{font-family:'Outfit',sans-serif;font-weight:700;font-size:1.25rem;color:var(--text-primary);margin-bottom:0.75rem}.seo-card p{font-size:0.9rem;color:var(--text-secondary);line-height:1.7}.seo-card strong{color:var(--text-primary)}
.site-footer{text-align:center;padding:2rem 0;margin-top:2rem;border-top:1px solid var(--border)}.footer-privacy{font-size:0.82rem;font-weight:500;color:var(--accent);margin-bottom:0.4rem}.footer-disclaimer,.footer-copyright{font-size:0.75rem;color:var(--text-muted);margin-bottom:0.4rem}.footer-copyright strong{color:var(--text-secondary)}
.toast{position:fixed;bottom:2rem;left:50%;transform:translateX(-50%) translateY(100px);background:var(--bg-surface);border:1px solid var(--accent);border-radius:var(--radius-sm);padding:0.7rem 1.4rem;font-size:0.85rem;font-weight:500;color:var(--accent);box-shadow:0 8px 32px rgba(0,0,0,0.4);opacity:0;transition:all 0.3s ease;z-index:1000;pointer-events:none}.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
@media(max-width:480px){.input-row{flex-direction:column;gap:0}.grain-row,.hop-row{flex-wrap:wrap}}