/* GreenCalc — Lush green on dark soil */
:root{--bg-primary:#0a1a0a;--bg-surface:#142014;--bg-hover:#1e2e1e;--bg-input:#0e180e;--text-primary:#e0f0e0;--text-secondary:#90b890;--text-muted:#507050;--accent:#22c55e;--accent-hover:#16a34a;--accent-glow:rgba(34,197,94,0.15);--accent-glow-strong:rgba(34,197,94,0.3);--border:rgba(144,184,144,0.1);--border-hover:rgba(34,197,94,0.4);--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:#f0faf0;--bg-surface:#fff;--bg-hover:#e0f0e0;--bg-input:#f0faf0;--text-primary:#0a2a0a;--text-secondary:#1a4a1a;--text-muted:#507050;--border:rgba(10,42,10,0.1);--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,#142014 0%,#0a1a0a 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(34,197,94,0.2);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:420px 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--third{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"],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}select{font-family:'Inter',sans-serif;font-size:0.85rem;cursor:pointer;padding-right:2rem;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23507050' d='M6 8L1 3h10z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 0.75rem center}input:focus,select:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-glow)}
.input-hint{display:block;font-size:0.75rem;color:var(--text-muted);margin-top:0.3rem}.section-subtitle{font-family:'Outfit',sans-serif;font-weight:700;font-size:1.1rem;color:var(--text-primary);margin-bottom:0.75rem}.section-hint{font-size:0.82rem;color:var(--text-muted);margin-bottom:1rem}
.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:#001a00;cursor:pointer;transition:all var(--transition);font-family:'Inter',sans-serif;margin-top:0.5rem}.btn-calculate:hover{transform:translateY(-1px);box-shadow:0 4px 16px rgba(34,197,94,0.35)}
.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)}
.npk-bars{display:flex;flex-direction:column;gap:0.5rem;margin-bottom:1.25rem}.npk-bar-row{display:flex;align-items:center;gap:0.75rem;font-size:0.82rem}.npk-bar-label{width:80px;font-weight:600;color:var(--text-primary)}.npk-bar-track{flex:1;height:20px;background:var(--bg-input);border-radius:10px;overflow:hidden}.npk-bar-fill{height:100%;border-radius:10px;transition:width 0.5s ease}.npk-bar-fill--n{background:linear-gradient(90deg,#22c55e,#16a34a)}.npk-bar-fill--p{background:linear-gradient(90deg,#38bdf8,#0ea5e9)}.npk-bar-fill--k{background:linear-gradient(90deg,#a78bfa,#7c3aed)}.npk-bar-val{width:60px;text-align:right;font-family:'JetBrains Mono',monospace;color:var(--text-muted);font-size:0.78rem}
.coverage-info{margin-bottom:1.25rem}.coverage-text{font-size:0.88rem;color:var(--text-secondary);line-height:1.6}
.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}}