:root{--iwnc-primary:#0072ce;--iwnc-primary-deep:#005fa3;--iwnc-secondary:#00a86b;--iwnc-secondary-light:#e6f0ff;--iwnc-danger:#e74c3c;--iwnc-bg:#f7f9fb;--iwnc-white:#ffffff;--iwnc-text:#26282c;--iwnc-border:#d8dce2;--iwnc-radius:5px;--iwnc-spacing:1.5rem;--iwnc-gap:0.6rem;--iwnc-text-muted:#6b7280;--iwnc-text-light:#9ca3af;--iwnc-accent-orange:#f59e0b;--iwnc-accent-teal:#0891b2;--iwnc-surface:#ffffff;--iwnc-surface-alt:#f0f4f8;--iwnc-shadow-sm:0 1px 3px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.05);--iwnc-shadow-md:0 4px 12px rgba(0, 0, 0, 0.08), 0 2px 4px rgba(0, 0, 0, 0.04);--iwnc-shadow-lg:0 10px 30px rgba(0, 0, 0, 0.1), 0 4px 8px rgba(0, 0, 0, 0.05);--iwnc-transition:0.18s ease;--iwnc-max-width:860px}[hidden]{display:none!important}.iwnc-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}:focus-visible{outline:2.5px solid var(--iwnc-primary);outline-offset:2px;border-radius:var(--iwnc-radius)}.iwnc-app{display:flex;flex-direction:column}.iwnc-header{background:var(--iwnc-white)!important;border:1px solid var(--iwnc-border)!important;padding:1.85rem 1rem;border-radius:var(--iwnc-radius);box-shadow:var(--iwnc-shadow-sm)}.iwnc-header-inner{display:flex;align-items:center;justify-content:space-between;gap:1rem;flex-wrap:wrap}.iwnc-logo{display:flex;align-items:center;gap:.75rem}.iwnc-logo-icon{width:40px;height:40px;flex-shrink:0}.iwnc-logo-title{font-size:clamp(1.5rem, 5vw, 2rem)!important;font-weight:700;color:var(--iwnc-primary)!important;letter-spacing:-.02em;line-height:1.1}.iwnc-logo-sub{display:block;font-size:0.72rem!important;color:var(--iwnc-text-muted)!important;font-weight:400;letter-spacing:.01em;text-transform:uppercase}.iwnc-header-meta{display:flex;align-items:center;gap:.75rem;flex-wrap:wrap}.iwnc-badge{display:inline-flex;align-items:center;gap:.3rem;background:#ebf5ff!important;color:var(--iwnc-primary-deep)!important;font-size:0.72rem!important;font-weight:600;letter-spacing:.04em;text-transform:uppercase;padding:.25rem .6rem;border-radius:20px;border:1px solid #bfe0ff!important}.iwnc-unit-toggle{display:flex;background:var(--iwnc-bg);border:1px solid var(--iwnc-border)!important;border-radius:6px;overflow:hidden}.iwnc-unit-btn{background:none;border:none;padding:.3rem .75rem;font-size:0.8rem!important;font-weight:500;color:var(--iwnc-text-muted)!important;cursor:pointer;transition:background var(--iwnc-transition),color var(--iwnc-transition);font-family:inherit}.iwnc-unit-btn--active{background:var(--iwnc-primary)!important;color:var(--iwnc-white)!important}.iwnc-unit-btn:not(.iwnc-unit-btn--active):hover{background:var(--iwnc-secondary-light);color:var(--iwnc-primary)!important}.iwnc-main{margin-top:1.5rem}.iwnc-steps{display:flex;justify-content:center;align-items:center;margin-bottom:1.5rem;padding:1rem .5rem;overflow-x:auto;-ms-overflow-style:none;scrollbar-width:none;border:1px solid var(--iwnc-border)!important;border-radius:var(--iwnc-radius);box-shadow:var(--iwnc-shadow-sm)}.iwnc-steps::-webkit-scrollbar{display:none}.iwnc-step{display:flex;flex-direction:column;align-items:center;gap:.35rem;min-width:80px;cursor:default;opacity:.4;transition:opacity var(--iwnc-transition)}.iwnc-step--active{opacity:1}.iwnc-step--done{opacity:.75}.iwnc-step-num{width:32px;height:32px;border-radius:50%;background:var(--iwnc-border);color:var(--iwnc-text-muted)!important;font-size:0.85rem!important;font-weight:700;display:flex;align-items:center;justify-content:center;transition:background var(--iwnc-transition),color var(--iwnc-transition)}.iwnc-step--active .iwnc-step-num{background:var(--iwnc-primary)!important;color:var(--iwnc-white)!important;box-shadow:0 0 0 4px rgb(0 114 206 / .15)}.iwnc-step--done .iwnc-step-num{background:var(--iwnc-secondary)!important;color:var(--iwnc-white)!important}.iwnc-step-label{font-size:0.7rem!important;font-weight:500;color:var(--iwnc-text-muted)!important;text-align:center;white-space:nowrap}.iwnc-step--active .iwnc-step-label{color:var(--iwnc-primary)!important;font-weight:600}.iwnc-step--done .iwnc-step-label{color:var(--iwnc-secondary)!important}.iwnc-step-line{flex:1;height:2px;background:var(--iwnc-border);min-width:20px;max-width:80px;margin-bottom:1.1rem}.iwnc-panel{background:var(--iwnc-white)!important;border:1px solid var(--iwnc-border)!important;border-radius:var(--iwnc-radius);padding:1.5rem;box-shadow:var(--iwnc-shadow-sm);animation:iwnc-fadeSlide 0.25s ease}@keyframes iwnc-fadeSlide{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.iwnc-panel-header{margin-bottom:1.75rem;padding-bottom:1.25rem;border-bottom:1px solid var(--iwnc-border)!important}.iwnc-panel-title{display:flex;align-items:center;gap:.6rem;font-size:1.15rem!important;font-weight:700;color:var(--iwnc-text)!important;margin-bottom:.35rem}.iwnc-panel-num{width:26px;height:26px;border-radius:50%;background:var(--iwnc-primary)!important;color:var(--iwnc-white)!important;font-size:0.78rem!important;font-weight:700;display:flex;align-items:center;justify-content:center;flex-shrink:0}.iwnc-panel-desc{font-size:0.875rem!important;color:var(--iwnc-text-muted)!important}.iwnc-field-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1.25rem var(--iwnc-spacing)}.iwnc-field{display:flex;flex-direction:column;gap:.3rem}.iwnc-field--full{grid-column:1 / -1}.iwnc-label{font-size:0.82rem!important;font-weight:600;color:var(--iwnc-text)!important;letter-spacing:.01em}.iwnc-req{color:var(--iwnc-danger)!important;font-weight:700}.iwnc-input{width:100%;padding:.6rem .85rem;font-size:0.9rem!important;font-family:inherit;color:var(--iwnc-text)!important;background:var(--iwnc-white);border:1.5px solid var(--iwnc-border)!important;border-radius:var(--iwnc-radius);transition:border-color var(--iwnc-transition),box-shadow var(--iwnc-transition);appearance:none;-webkit-appearance:none}.iwnc-input:focus{border-color:var(--iwnc-primary)!important;box-shadow:0 0 0 3px rgb(0 114 206 / .12);outline:none}.iwnc-input::placeholder{color:var(--iwnc-text-light)!important}.iwnc-input.iwnc-input--error{border-color:var(--iwnc-danger)!important;box-shadow:0 0 0 3px rgb(231 76 60 / .1)}.iwnc-select-wrap{position:relative}.iwnc-select-wrap::after{content:"";position:absolute;right:12px;top:50%;transform:translateY(-50%);width:0;height:0;border-left:5px solid #fff0;border-right:5px solid #fff0;border-top:5px solid var(--iwnc-text-muted);pointer-events:none}.iwnc-select{padding-right:2.2rem;cursor:pointer}.iwnc-field-hint{font-size:0.75rem!important;color:var(--iwnc-text-muted)!important;line-height:1.45}.iwnc-field-error{font-size:0.75rem!important;color:var(--iwnc-danger)!important;font-weight:500;display:none}.iwnc-kc-display{display:flex;align-items:center;gap:.75rem;padding:.6rem .85rem;background:var(--iwnc-secondary-light)!important;border:1.5px solid #c4deff!important;border-radius:var(--iwnc-radius);min-height:42px}.iwnc-kc-val{font-size:1.25rem!important;font-weight:700;color:var(--iwnc-primary-deep)!important;font-family:"DM Mono",monospace}.iwnc-kc-source{font-size:0.75rem!important;color:var(--iwnc-text-muted)!important}.iwnc-system-cards{display:grid;grid-template-columns:repeat(5,1fr);gap:.6rem}.iwnc-system-card{display:flex;flex-direction:column;align-items:center;gap:.3rem;padding:.85rem .5rem;border:2px solid var(--iwnc-border)!important;border-radius:8px;cursor:pointer;transition:border-color var(--iwnc-transition),background var(--iwnc-transition),box-shadow var(--iwnc-transition);text-align:center;background:var(--iwnc-white)!important;user-select:none}.iwnc-system-card:hover{border-color:var(--iwnc-primary)!important;background:#f0f6ff!important}.iwnc-system-card--selected{border-color:var(--iwnc-primary)!important;background:#ebf5ff!important;box-shadow:0 0 0 3px rgb(0 114 206 / .1)}.iwnc-system-icon{font-size:1.5rem!important;line-height:1}.iwnc-system-name{font-size:0.75rem!important;font-weight:600;color:var(--iwnc-text)!important}.iwnc-system-eff{font-size:0.68rem!important;color:var(--iwnc-secondary)!important;font-weight:500}.iwnc-panel-nav{display:flex;justify-content:space-between;align-items:center;margin-top:2rem;padding-top:1.5rem;border-top:1px solid var(--iwnc-border)!important;gap:1rem}.iwnc-btn{display:inline-flex;align-items:center;gap:.45rem;padding:.6rem 1.25rem;font-family:inherit;font-size:0.875rem!important;font-weight:600;border-radius:var(--iwnc-radius);border:1.5px solid transparent!important;cursor:pointer;transition:background var(--iwnc-transition),color var(--iwnc-transition),border-color var(--iwnc-transition),box-shadow var(--iwnc-transition),transform 0.1s ease;white-space:nowrap}.iwnc-btn:active{transform:translateY(1px)}.iwnc-btn--primary{background:var(--iwnc-primary)!important;color:var(--iwnc-white)!important;border-color:var(--iwnc-primary)!important}.iwnc-btn--primary:hover{background:var(--iwnc-primary-deep)!important;border-color:var(--iwnc-primary-deep)!important;box-shadow:0 2px 8px rgb(0 114 206 / .3)}.iwnc-btn--calculate{background:var(--iwnc-secondary)!important;color:var(--iwnc-white)!important;border-color:var(--iwnc-secondary)!important;padding:.7rem 1.75rem;font-size:0.95rem!important;letter-spacing:.01em;box-shadow:0 2px 8px rgb(0 168 107 / .2)}.iwnc-btn--calculate:hover{background:#009060!important;border-color:#009060!important;box-shadow:0 4px 14px rgb(0 168 107 / .35)}.iwnc-btn--ghost{background:transparent!important;color:var(--iwnc-text-muted)!important;border-color:var(--iwnc-border)!important}.iwnc-btn--ghost:hover{background:var(--iwnc-bg)!important;color:var(--iwnc-text)!important;border-color:#bfc4ce!important}.iwnc-btn--action{background:var(--iwnc-white)!important;color:var(--iwnc-text)!important;border-color:var(--iwnc-border)!important;font-size:0.8rem!important;padding:.5rem .9rem}.iwnc-btn--action:hover{background:var(--iwnc-secondary-light)!important;border-color:var(--iwnc-primary)!important;color:var(--iwnc-primary)!important}.iwnc-btn--danger-ghost{background:transparent!important;color:var(--iwnc-danger)!important;border-color:#fcd4d0!important;font-size:0.8rem!important;padding:.5rem .9rem}.iwnc-btn--danger-ghost:hover{background:#fff1f0!important;border-color:var(--iwnc-danger)!important}.iwnc-btn--danger{background:var(--iwnc-danger)!important;color:var(--iwnc-white)!important;border-color:var(--iwnc-danger)!important}.iwnc-btn--danger:hover{background:#c0392b!important;border-color:#c0392b!important}.iwnc-result-section{background:var(--iwnc-white)!important;border:1px solid var(--iwnc-border)!important;border-radius:var(--iwnc-radius);padding:1.5rem;box-shadow:var(--iwnc-shadow-sm);animation:iwnc-fadeSlide 0.3s ease}.iwnc-result-header{display:flex;justify-content:space-between;align-items:flex-start;gap:1rem;flex-wrap:wrap;margin-bottom:1.75rem;padding-bottom:1.25rem;border-bottom:1px solid var(--iwnc-border)!important}.iwnc-result-title{font-size:1.2rem!important;font-weight:700;color:var(--iwnc-text)!important;margin-bottom:.25rem}.iwnc-result-subtitle{font-size:0.82rem!important;color:var(--iwnc-text-muted)!important}.iwnc-result-actions{display:flex;gap:.5rem;flex-wrap:wrap}.iwnc-metric-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:.75rem;margin-bottom:1rem}.iwnc-metric-card{display:flex;flex-direction:column;gap:.15rem;padding:1.1rem 1rem;border-radius:8px;background:var(--iwnc-bg)!important;border:1.5px solid var(--iwnc-border)!important;transition:box-shadow var(--iwnc-transition)}.iwnc-metric-card:hover{box-shadow:var(--iwnc-shadow-sm)}.iwnc-metric-card--primary{background:linear-gradient(135deg,#e8f4ff 0%,#d6ecff 100%)!important;border-color:#a8d4f5!important}.iwnc-metric-card--accent{background:linear-gradient(135deg,#e6fff5 0%,#d0fae8 100%)!important;border-color:#86e8bc!important}.iwnc-metric-card--highlight{background:linear-gradient(135deg,#fff8e1 0%,#ffefc8 100%)!important;border-color:#f9d86a!important}.iwnc-metric-label{font-size:0.72rem!important;font-weight:600;text-transform:uppercase;letter-spacing:.05em;color:var(--iwnc-text-muted)!important}.iwnc-metric-val{font-size:1.9rem!important;font-weight:700;color:var(--iwnc-text)!important;line-height:1.1;font-family:"DM Mono",monospace;letter-spacing:-.02em}.iwnc-metric-unit{font-size:0.75rem!important;font-weight:500;color:var(--iwnc-primary)!important}.iwnc-metric-desc{font-size:0.7rem!important;color:var(--iwnc-text-muted)!important;margin-top:.2rem}.iwnc-vol-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:.75rem;margin-bottom:1.5rem}.iwnc-vol-card{padding:.85rem 1rem;border-radius:8px;background:var(--iwnc-surface-alt)!important;border:1px solid var(--iwnc-border)!important;display:flex;flex-direction:column;gap:.1rem}.iwnc-vol-label{font-size:0.72rem!important;font-weight:600;color:var(--iwnc-text-muted)!important;text-transform:uppercase;letter-spacing:.04em}.iwnc-vol-val{font-size:1.35rem!important;font-weight:700;color:var(--iwnc-primary-deep)!important;font-family:"DM Mono",monospace}.iwnc-vol-unit{font-size:0.72rem!important;color:var(--iwnc-text-muted)!important}.iwnc-breakdown{border:1px solid var(--iwnc-border)!important;border-radius:8px;margin-bottom:1.25rem;overflow:hidden}.iwnc-breakdown-title{font-size:0.85rem!important;font-weight:700;color:var(--iwnc-text)!important;padding:.8rem 1rem;background:var(--iwnc-bg)!important;border-bottom:1px solid var(--iwnc-border)!important;letter-spacing:.01em}.iwnc-breakdown-body{padding:1rem;display:flex;flex-direction:column;gap:.4rem}.iwnc-breakdown-row{display:flex;justify-content:space-between;align-items:center;padding:.5rem .75rem;border-radius:5px;font-size:0.85rem!important;gap:1rem}.iwnc-breakdown-row:nth-child(even){background:var(--iwnc-bg)!important}.iwnc-breakdown-key{color:var(--iwnc-text-muted)!important;font-size:0.82rem!important;flex:1}.iwnc-breakdown-key em{font-style:normal;font-family:"DM Mono",monospace;background:#eef2f7;padding:.1rem .4rem;border-radius:3px;font-size:0.78rem!important;color:var(--iwnc-primary-deep)!important;margin-right:.3rem}.iwnc-breakdown-val{font-weight:700;color:var(--iwnc-text)!important;font-family:"DM Mono",monospace;font-size:0.85rem!important;white-space:nowrap}.iwnc-breakdown-divider{border:none;border-top:1px dashed var(--iwnc-border)!important;margin:.25rem 0}.iwnc-soil-info{border:1px solid var(--iwnc-border)!important;border-radius:8px;margin-bottom:1.25rem;overflow:hidden}.iwnc-soil-title{font-size:0.85rem!important;font-weight:700;color:var(--iwnc-text)!important;padding:.8rem 1rem;background:var(--iwnc-bg)!important;border-bottom:1px solid var(--iwnc-border)!important}.iwnc-soil-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:0}.iwnc-soil-item{padding:.85rem 1rem;border-right:1px solid var(--iwnc-border)!important;display:flex;flex-direction:column;gap:.2rem}.iwnc-soil-item:last-child{border-right:none}.iwnc-soil-item-label{font-size:0.72rem!important;font-weight:600;text-transform:uppercase;letter-spacing:.04em;color:var(--iwnc-text-muted)!important}.iwnc-soil-item-val{font-size:1.1rem!important;font-weight:700;color:var(--iwnc-text)!important;font-family:"DM Mono",monospace}.iwnc-soil-item-unit{font-size:0.72rem!important;color:var(--iwnc-text-muted)!important}.iwnc-recommendations{background:linear-gradient(135deg,#f0f8ff 0%,#e8f5e8 100%)!important;border:1px solid #c4deff!important;border-radius:8px;padding:1.1rem 1.25rem;margin-bottom:1.25rem}.iwnc-rec-title{display:flex;align-items:center;gap:.4rem;font-size:0.875rem!important;font-weight:700;color:var(--iwnc-primary-deep)!important;margin-bottom:.75rem}.iwnc-rec-list{list-style:none;display:flex;flex-direction:column;gap:.5rem}.iwnc-rec-list li{font-size:0.82rem!important;color:var(--iwnc-text)!important;padding-left:1.1rem;position:relative;line-height:1.55}.iwnc-rec-list li::before{content:"→";position:absolute;left:0;color:var(--iwnc-secondary)!important;font-weight:700}.iwnc-formula-ref{border:1px solid var(--iwnc-border)!important;border-radius:8px;margin-bottom:1.25rem;overflow:hidden}.iwnc-formula-toggle{display:flex;align-items:center;padding:.85rem 1rem;font-size:0.82rem!important;font-weight:600;color:var(--iwnc-text-muted)!important;cursor:pointer;background:var(--iwnc-bg)!important;user-select:none;list-style:none;gap:.5rem}.iwnc-formula-toggle::-webkit-details-marker{display:none}.iwnc-formula-toggle::before{content:"▶";font-size:.6rem;transition:transform var(--iwnc-transition)}details[open] .iwnc-formula-toggle::before{transform:rotate(90deg)}.iwnc-formula-body{padding:1.25rem;font-size:0.8rem!important;color:var(--iwnc-text-muted)!important;line-height:1.7;display:flex;flex-direction:column;gap:1rem;border-top:1px solid var(--iwnc-border)!important}.iwnc-formula-eq{background:#f8fafc!important;border:1px solid var(--iwnc-border)!important;border-radius:6px;padding:.75rem 1rem;font-family:"DM Mono",monospace;font-size:0.78rem!important;color:var(--iwnc-primary-deep)!important;overflow-x:auto}.iwnc-formula-cite{font-size:0.73rem!important;color:var(--iwnc-text-light)!important;font-style:italic}.iwnc-recalc-row{display:flex;justify-content:flex-start;padding-top:1rem;border-top:1px solid var(--iwnc-border)!important}.iwnc-modal-overlay{position:fixed;inset:0;background:rgb(38 40 44 / .5);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;z-index:1000;animation:iwnc-fadeIn 0.18s ease}@keyframes iwnc-fadeIn{from{opacity:0}to{opacity:1}}.iwnc-modal{background:var(--iwnc-white)!important;border-radius:10px;padding:2rem;max-width:380px;width:calc(100% - 2rem);box-shadow:var(--iwnc-shadow-lg);animation:iwnc-modalIn 0.22s ease}@keyframes iwnc-modalIn{from{opacity:0;transform:scale(.93)}to{opacity:1;transform:scale(1)}}.iwnc-modal-title{font-size:1rem!important;font-weight:700;margin-bottom:.6rem}.iwnc-modal-body{font-size:0.875rem!important;color:var(--iwnc-text-muted)!important;margin-bottom:1.5rem;line-height:1.6}.iwnc-modal-actions{display:flex;justify-content:flex-end;gap:.6rem}.iwnc-toast{position:fixed;bottom:1.5rem;left:50%;transform:translateX(-50%) translateY(100px);background:var(--iwnc-text)!important;color:var(--iwnc-white)!important;padding:.65rem 1.25rem;border-radius:20px;font-size:0.82rem!important;font-weight:500;z-index:2000;opacity:0;transition:transform 0.3s ease,opacity 0.3s ease;white-space:nowrap;box-shadow:var(--iwnc-shadow-md);pointer-events:none}.iwnc-toast--visible{opacity:1;transform:translateX(-50%) translateY(0)}.iwnc-toast--success{background:var(--iwnc-secondary)!important}.iwnc-toast--error{background:var(--iwnc-danger)!important}.iwnc-input.iwnc-input--error{border-color:var(--iwnc-danger)!important}.iwnc-field-error-msg{font-size:0.72rem!important;color:var(--iwnc-danger)!important;font-weight:500;margin-top:-.15rem}.iwnc-progress-bar{height:6px;background:var(--iwnc-border);border-radius:3px;overflow:hidden;margin-top:.3rem}.iwnc-progress-fill{height:100%;border-radius:3px;background:linear-gradient(90deg,var(--iwnc-primary),var(--iwnc-secondary));transition:width 0.6s ease}@media (max-width:720px){.iwnc-header-inner{padding:.75rem 1rem}.iwnc-steps{gap:0}.iwnc-step{min-width:60px}.iwnc-step-label{font-size:0.6rem!important}.iwnc-panel{padding:1.25rem}.iwnc-field-grid{grid-template-columns:1fr}.iwnc-field--full{grid-column:1}.iwnc-system-cards{grid-template-columns:repeat(3,1fr)}.iwnc-metric-grid{grid-template-columns:repeat(2,1fr)}.iwnc-soil-grid{grid-template-columns:1fr}.iwnc-soil-item{border-right:none!important;border-bottom:1px solid var(--iwnc-border)!important}.iwnc-soil-item:last-child{border-bottom:none!important}.iwnc-result-header{flex-direction:column}.iwnc-result-actions{width:100%}.iwnc-panel-nav{flex-wrap:wrap;gap:.5rem}}@media (max-width:420px){.iwnc-system-cards{grid-template-columns:repeat(2,1fr)}.iwnc-metric-grid{grid-template-columns:1fr}.iwnc-logo-sub{display:none}.iwnc-badge{display:none}.iwnc-result-actions{flex-direction:column}.iwnc-result-actions .iwnc-btn{width:100%;justify-content:center}.iwnc-btn--calculate{width:100%;justify-content:center}}@media (max-width:360px){.iwnc-system-cards{grid-template-columns:1fr 1fr}}@media print{.iwnc-header,.iwnc-steps,.iwnc-result-actions,.iwnc-recalc-row,.iwnc-formula-ref{display:none!important}.iwnc-result-section{box-shadow:none;border:1px solid #ccc!important}.iwnc-metric-card,.iwnc-vol-card{break-inside:avoid}}