/* ===== CSS Reset & Base ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{font-size:16px;scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:system-ui,-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;line-height:1.6;color:#2c2416;background:#faf8f4;min-height:100vh}
img{max-width:100%;height:auto}
button,select,input{font:inherit;color:inherit}
a{color:#5a8f3c;text-decoration:none}
a:hover,a:focus{text-decoration:underline}
ul,ol{list-style:none}
fieldset{border:none;padding:0;margin:0}
legend{padding:0}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

/* ===== Design Tokens ===== */
:root{
  --c-green-700:#3d6b26;
  --c-green-600:#5a8f3c;
  --c-green-500:#6da84e;
  --c-green-100:#e8f0df;
  --c-green-50:#f4f9ef;
  --c-warm-900:#2c2416;
  --c-warm-700:#4a3f2e;
  --c-warm-500:#7a6e5a;
  --c-warm-300:#b8ad98;
  --c-warm-100:#e8e2d6;
  --c-warm-50:#faf8f4;
  --c-brown-600:#8b6914;
  --c-brown-500:#a67c1a;
  --c-amber-500:#d4a017;
  --c-amber-100:#fef3cd;
  --c-red-600:#c0392b;
  --c-red-100:#fdecea;
  --shadow-sm:0 1px 3px rgba(0,0,0,.08);
  --shadow-md:0 4px 12px rgba(0,0,0,.1);
  --shadow-lg:0 8px 24px rgba(0,0,0,.12);
  --radius-sm:6px;
  --radius-md:10px;
  --radius-lg:16px;
  --max-width:1200px;
  --header-height:60px;
}

/* ===== Header ===== */
.site-header{background:var(--c-green-700);color:#fff;position:sticky;top:0;z-index:100;box-shadow:var(--shadow-sm)}
.header-inner{max-width:var(--max-width);margin:0 auto;padding:0 1.25rem;display:flex;align-items:center;justify-content:space-between;height:var(--header-height)}
.logo{display:flex;align-items:center;gap:.5rem;color:#fff;text-decoration:none;font-weight:700;font-size:1.15rem}
.logo:hover,.logo:focus{text-decoration:none;color:#fff}
.logo-accent{color:#c8e6a8}
.site-nav{display:flex;gap:1.5rem}
.site-nav a{color:rgba(255,255,255,.85);font-size:.9rem;font-weight:500;text-decoration:none;padding:.25rem 0;border-bottom:2px solid transparent;transition:color .15s,border-color .15s}
.site-nav a:hover,.site-nav a:focus{color:#fff;border-bottom-color:rgba(255,255,255,.5);text-decoration:none}
.nav-toggle{display:none;flex-direction:column;gap:4px;background:none;border:none;cursor:pointer;padding:.25rem}
.nav-toggle span{display:block;width:22px;height:2px;background:#fff;border-radius:1px;transition:transform .2s,opacity .2s}

/* ===== Hero ===== */
.hero{background:linear-gradient(135deg,var(--c-green-700) 0%,var(--c-green-600) 50%,var(--c-brown-600) 100%);color:#fff;padding:3rem 1.25rem 3.5rem}
.hero-inner{max-width:var(--max-width);margin:0 auto;text-align:center;max-width:680px}
.hero-eyebrow{font-size:.8rem;text-transform:uppercase;letter-spacing:.1em;opacity:.75;margin-bottom:.75rem}
.hero-inner h1{font-size:clamp(1.8rem,4vw,2.8rem);line-height:1.2;margin-bottom:1rem;font-weight:800}
.hero-sub{font-size:1.05rem;opacity:.9;line-height:1.6}

/* ===== Workspace ===== */
.workspace{max-width:var(--max-width);margin:0 auto;padding:2.5rem 1.25rem}
.workspace-grid{display:grid;grid-template-columns:1fr 380px;gap:2rem;align-items:start}

/* ===== Panels ===== */
.panel{background:#fff;border-radius:var(--radius-lg);box-shadow:var(--shadow-md);overflow:hidden}
.panel-header{padding:1.5rem 1.5rem .75rem;border-bottom:1px solid var(--c-warm-100)}
.panel-header h3{font-size:1.15rem;color:var(--c-warm-900);font-weight:700}
.panel-sub{font-size:.85rem;color:var(--c-warm-500);margin-top:.25rem}

.panel-controls{padding-bottom:1.5rem}
.panel-results{padding-bottom:1.5rem}

/* ===== Controls ===== */
.control-group{padding:1rem 1.5rem 0}
.control-label{display:block;font-weight:600;font-size:.9rem;color:var(--c-warm-700);margin-bottom:.4rem}
.control-select{width:100%;padding:.6rem .75rem;border:2px solid var(--c-warm-300);border-radius:var(--radius-sm);background:#fff;font-size:.9rem;cursor:pointer;transition:border-color .15s}
.control-select:focus{outline:none;border-color:var(--c-green-600);box-shadow:0 0 0 3px rgba(90,143,60,.15)}

/* ===== Presets ===== */
.presets-row{padding:1rem 1.5rem 0}
.presets-label{font-size:.8rem;font-weight:600;color:var(--c-warm-500);margin-bottom:.5rem}
.preset-buttons{display:flex;flex-wrap:wrap;gap:.4rem}
.preset-btn{padding:.35rem .75rem;border:1px solid var(--c-warm-300);border-radius:20px;background:var(--c-warm-50);font-size:.8rem;cursor:pointer;transition:all .15s;color:var(--c-warm-700)}
.preset-btn:hover,.preset-btn:focus{background:var(--c-green-100);border-color:var(--c-green-600);color:var(--c-green-700)}
.preset-btn.active{background:var(--c-green-600);color:#fff;border-color:var(--c-green-600)}

/* ===== Factors ===== */
.factor-group{padding:.75rem 1.5rem 0;margin-top:.75rem}
.factor-legend{font-weight:700;font-size:.85rem;color:var(--c-warm-900);padding-bottom:.5rem;border-bottom:2px solid var(--c-green-100);margin-bottom:.75rem}
.factor-item{padding:.65rem 0;border-bottom:1px solid var(--c-warm-100)}
.factor-item:last-child{border-bottom:none}
.factor-top{display:flex;align-items:center;justify-content:space-between;gap:.75rem}
.factor-label{font-size:.9rem;font-weight:500;color:var(--c-warm-700);display:flex;align-items:center;gap:.4rem;cursor:pointer}
.factor-icon{font-size:1.1rem;flex-shrink:0}
.factor-check{width:18px;height:18px;accent-color:var(--c-green-600);cursor:pointer;flex-shrink:0}
.factor-desc{font-size:.78rem;color:var(--c-warm-500);margin-top:.25rem;padding-left:1.75rem;line-height:1.45}

/* ===== Slider ===== */
.slider-group{padding:1rem 1.5rem 0}
.control-slider{width:100%;accent-color:var(--c-green-600);margin-top:.5rem}
.slider-labels{display:flex;justify-content:space-between;font-size:.72rem;color:var(--c-warm-500);margin-top:.25rem}

/* ===== Results Panel ===== */
.zone-display{text-align:center;padding:1.5rem 1.5rem 1rem}
.zone-main{display:flex;align-items:baseline;justify-content:center;gap:.1rem}
.zone-number{font-size:4rem;font-weight:800;color:var(--c-green-700);line-height:1}
.zone-half{font-size:1.8rem;font-weight:700;color:var(--c-green-500)}
.zone-range{font-size:.85rem;color:var(--c-warm-500);margin-top:.25rem}
.zone-change{margin-top:.75rem}
.zone-change-label{display:inline-block;padding:.25rem .75rem;border-radius:20px;font-size:.8rem;font-weight:600;background:var(--c-warm-100);color:var(--c-warm-700)}
.zone-change-label.warm{background:#d4edda;color:#155724}
.zone-change-label.cool{background:#cce5ff;color:#004085}

/* ===== Confidence ===== */
.confidence-bar{padding:0 1.5rem 1rem}
.confidence-label{font-size:.8rem;color:var(--c-warm-700);margin-bottom:.35rem}
.confidence-track{height:8px;background:var(--c-warm-100);border-radius:4px;overflow:hidden}
.confidence-fill{height:100%;background:var(--c-green-500);border-radius:4px;transition:width .3s ease}
.confidence-fill.low{background:var(--c-amber-500)}
.confidence-fill.high{background:var(--c-green-600)}
.confidence-note{font-size:.72rem;color:var(--c-warm-500);margin-top:.35rem}

/* ===== Warnings ===== */
.warnings{padding:0 1.5rem}
.warning-item{padding:.5rem .75rem;border-radius:var(--radius-sm);font-size:.8rem;margin-bottom:.4rem;display:flex;align-items:flex-start;gap:.4rem}
.warning-item.warn{background:var(--c-amber-100);color:#856404}
.warning-item.error{background:var(--c-red-100);color:var(--c-red-600)}
.warning-item.info{background:#d1ecf1;color:#0c5460}

/* ===== Plant Recs ===== */
.plant-recs{padding:1rem 1.5rem 0}
.plant-recs h4{font-size:.95rem;font-weight:700;color:var(--c-warm-900);margin-bottom:.75rem}
.plant-grid{display:grid;grid-template-columns:1fr 1fr;gap:.5rem}
.plant-card{border:1px solid var(--c-warm-100);border-radius:var(--radius-sm);padding:.6rem .75rem;background:var(--c-warm-50)}
.plant-name{display:block;font-size:.82rem;font-weight:600;color:var(--c-warm-900)}
.plant-zone{display:block;font-size:.72rem;color:var(--c-warm-500);margin-top:.1rem}

/* ===== Result Actions ===== */
.result-actions{padding:1.25rem 1.5rem 0;display:flex;flex-wrap:wrap;gap:.5rem}
.btn{padding:.55rem 1rem;border-radius:var(--radius-sm);font-size:.85rem;font-weight:600;cursor:pointer;transition:all .15s;border:2px solid transparent;display:inline-flex;align-items:center;gap:.3rem}
.btn-primary{background:var(--c-green-600);color:#fff;border-color:var(--c-green-600)}
.btn-primary:hover,.btn-primary:focus{background:var(--c-green-700);border-color:var(--c-green-700)}
.btn-secondary{background:#fff;color:var(--c-green-700);border-color:var(--c-green-600)}
.btn-secondary:hover,.btn-secondary:focus{background:var(--c-green-50)}
.save-status{padding:.5rem 1.5rem 0;font-size:.8rem;color:var(--c-warm-500);min-height:1.2rem}
.save-status.success{color:var(--c-green-700)}

/* ===== Thermometer CTA ===== */
.thermometer-cta{margin:1.25rem 1.5rem 0;padding:1rem;background:var(--c-green-50);border-radius:var(--radius-md);border:1px solid var(--c-green-100)}
.thermometer-cta h4{font-size:.9rem;font-weight:700;color:var(--c-warm-900);margin-bottom:.4rem}
.thermometer-cta p{font-size:.8rem;color:var(--c-warm-700);line-height:1.5;margin-bottom:.75rem}

/* ===== Content Sections ===== */
.content-section{padding:3rem 1.25rem}
.content-section--alt{background:var(--c-green-50)}
.content-inner{max-width:var(--max-width);margin:0 auto}
.content-inner--narrow{max-width:720px}
.content-inner h2{font-size:1.5rem;font-weight:800;color:var(--c-warm-900);margin-bottom:1rem}
.content-inner .lead{font-size:1.05rem;color:var(--c-warm-700);margin-bottom:1.25rem;line-height:1.65}
.content-inner p{font-size:.95rem;color:var(--c-warm-700);line-height:1.65;margin-bottom:1rem}

/* ===== Scenario Cards ===== */
.scenario-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:1.25rem;margin-top:1.5rem}
.scenario-card{background:#fff;border-radius:var(--radius-md);padding:1.25rem;box-shadow:var(--shadow-sm);border:1px solid var(--c-warm-100)}
.scenario-card h3{font-size:1rem;font-weight:700;color:var(--c-green-700);margin-bottom:.5rem}
.scenario-card p{font-size:.85rem;color:var(--c-warm-700);line-height:1.55}

/* ===== Mistake List ===== */
.mistake-list{margin-top:1.25rem;display:flex;flex-direction:column;gap:.75rem}
.mistake-list li{padding:.75rem 1rem;background:#fff;border-radius:var(--radius-sm);border-left:4px solid var(--c-amber-500);font-size:.9rem;color:var(--c-warm-700);line-height:1.55}

/* ===== FAQ ===== */
.faq-list{margin-top:1.25rem;display:flex;flex-direction:column;gap:0}
.faq-item{padding:1.25rem 0;border-bottom:1px solid var(--c-warm-100)}
.faq-item:last-child{border-bottom:none}
.faq-item dt{font-weight:700;font-size:.95rem;color:var(--c-warm-900);margin-bottom:.4rem}
.faq-item dd{font-size:.9rem;color:var(--c-warm-700);line-height:1.6}

/* ===== Footer ===== */
.site-footer{background:var(--c-warm-900);color:rgba(255,255,255,.7);padding:2rem 1.25rem;margin-top:2rem}
.footer-inner{max-width:var(--max-width);margin:0 auto;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:1rem}
.footer-inner p{font-size:.8rem}
.footer-inner a{color:rgba(255,255,255,.7)}
.footer-inner a:hover,.footer-inner a:focus{color:#fff}
.footer-nav{display:flex;gap:1.25rem}
.footer-nav a{font-size:.8rem}

/* ===== Print Styles ===== */
@media print{
  .site-header,.site-footer,.result-actions,.thermometer-cta,.confidence-bar,.nav-toggle,.presets-row{display:none!important}
  body{background:#fff;color:#000}
  .panel{box-shadow:none;border:1px solid #ccc}
  .workspace-grid{grid-template-columns:1fr 1fr}
  .factor-desc,.confidence-note{font-size:.7rem}
}

/* ===== Responsive ===== */
@media(max-width:900px){
  .workspace-grid{grid-template-columns:1fr}
  .panel-results{order:-1}
}
@media(max-width:640px){
  .header-inner{padding:0 1rem}
  .site-nav{display:none;position:absolute;top:var(--header-height);left:0;right:0;background:var(--c-green-700);flex-direction:column;padding:1rem 1.25rem;gap:0;box-shadow:var(--shadow-md)}
  .site-nav.open{display:flex}
  .site-nav a{padding:.65rem 0;border-bottom:1px solid rgba(255,255,255,.15);width:100%}
  .nav-toggle{display:flex}
  .hero{padding:2rem 1rem 2.5rem}
  .workspace{padding:1.5rem 1rem}
  .plant-grid{grid-template-columns:1fr}
  .scenario-cards{grid-template-columns:1fr}
  .footer-inner{flex-direction:column;text-align:center}
  .zone-number{font-size:3rem}
}
@media(max-width:400px){
  .preset-buttons{flex-direction:column}
  .preset-btn{text-align:center}
  .result-actions{flex-direction:column}
  .btn{width:100%;justify-content:center}
}



/* Factory-injected deployment helpers. The AI owns the site design above this block. */
.ad-unit {
  width: min(100%, 720px);
  min-height: 120px;
  margin: 24px auto;
  display: block;
}

.legal-page {
  width: min(900px, calc(100% - 32px));
  margin: 40px auto;
}

.factory-fallback-nav {
  width: min(900px, calc(100% - 32px));
  margin: 24px auto 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  align-items: center;
  font-size: 0.95rem;
}

.factory-fallback-nav a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}