:root {
  --primary-color: #0d47a1;
  --secondary-color: #1976d2;
  --accent-color: #ffca28;
  --bg-color: #f4f6f8;
  --card-bg: #ffffff;
  --text-color: #333333;
  --border-color: #e0e0e0;
}

* { box-sizing: border-box; }

body {
  font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  margin: 0;
  padding: 0;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1.5rem;
}

/* Header */
header {
  text-align: center;
  margin-top: 1.5rem;
  margin-bottom: 1rem;
}

h1 {
  font-family: 'Montserrat', sans-serif;
  font-size: 2rem;
  color: var(--primary-color);
  margin-bottom: 0.5rem;
}

.lead {
  font-size: 1rem;
  max-width: 800px;
  margin: 0 auto;
  opacity: 0.9;
}

/* Sticky Banner */
.sticky-banner {
  position: sticky;
  top: 0;
  z-index: 999;
  background: var(--primary-color);
  color: white;
  padding: 0.75rem 1rem;
  box-shadow: 0 2px 10px rgba(0,0,0,0.15);
}

.banner-content {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  gap: 1rem;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
}

.banner-item {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  min-width: 160px;
}

.banner-item.small { min-width: 130px; }

.banner-label {
  font-size: 0.8rem;
  opacity: 0.9;
}

.banner-value {
  font-size: 1.2rem;
  font-weight: 700;
}

/* Grid */
.grid {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

/* Cards */
.card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  padding: 1.25rem;
  box-shadow: 0 2px 6px rgba(0,0,0,0.06);
}

.card h2 {
  font-family: 'Montserrat', sans-serif;
  color: var(--primary-color);
  margin: 0 0 0.75rem 0;
  font-size: 1.25rem;
}

.subtitle {
  margin: 0 0 1rem 0;
  opacity: 0.85;
}

/* Inputs */
.input-group {
  display: flex;
  flex-direction: column;
  margin-bottom: 1rem;
}

label {
  font-weight: 600;
  margin-bottom: 0.35rem;
}

select {
  padding: 0.6rem;
  border: 1px solid var(--border-color);
  border-radius: 10px;
  font-size: 1rem;
  outline: none;
}

.info-display {
  display: flex;
  gap: 0.5rem;
  align-items: baseline;
  padding: 0.75rem;
  border-radius: 10px;
  background: #eef5ff;
  border: 1px solid #cfe2ff;
}

.info-display .label { font-weight: 600; }
.info-display .value {
  font-weight: 800;
  font-size: 1.2rem;
}

/* Sliders */
.slider-group { margin-bottom: 1rem; }

.slider-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}

.slider-value { font-weight: 700; }

input[type="range"] {
  width: 100%;
  margin-top: 0.4rem;
}

.note {
  display: block;
  margin-top: 0.3rem;
  font-size: 0.85rem;
  opacity: 0.8;
}

/* Appliance note & badges */
.appliance-note {
  margin: 0.75rem 0 1rem 0;
  padding: 0.75rem 0.9rem;
  background: #fff8e1;
  border: 1px solid #ffe082;
  border-radius: 10px;
  font-size: 0.9rem;
  line-height: 1.35;
}

.badge {
  display: inline-block;
  padding: 0.15rem 0.45rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  vertical-align: middle;
  margin-left: 0.35rem;
  border: 1px solid var(--border-color);
  background: #f1f3f4;
  color: #333;
}

.badge-cycle {
  background: #e3f2fd;
  border-color: #bbdefb;
}

/* Appliance list */
#appliance-list {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.appliance-row {
  display: grid;
  grid-template-columns: 32px 1.2fr 1fr 1fr 1fr;
  gap: 0.6rem;
  align-items: center;
  padding: 0.75rem;
  border: 1px solid var(--border-color);
  border-radius: 12px;
  background: #fafafa;
}

.app-name {
  font-weight: 600;
  font-size: 0.82rem; /* smaller per request */
  line-height: 1.2;
}

.app-controls { margin: 0; }

.app-check { transform: scale(1.2); }

/* Results */
.results-card .summary-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.9rem;
}

@media (min-width: 900px) {
  .results-card .summary-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.summary-item {
  padding: 0.8rem;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  background: white;
}

.summary-item .label {
  display: block;
  font-weight: 600;
  opacity: 0.8;
  margin-bottom: 0.25rem;
}

.result-val {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--secondary-color);
}

.unit-small {
  font-size: 0.9rem;
  font-weight: 600;
  opacity: 0.85;
}

.result-note {
  margin-top: 1rem;
  font-size: 0.9rem;
  opacity: 0.85;
}

/* Footer */
footer {
  text-align: center;
  opacity: 0.8;
  margin: 2rem 0 1rem 0;
}
/* Inverter wizard (collapsed by default) */
.collapsible-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.9rem;
  flex-wrap: wrap;
}

.btn {
  border: 1px solid var(--border-color);
  background: white;
  color: var(--text-color);
  padding: 0.6rem 0.9rem;
  border-radius: 12px;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.05s ease, box-shadow 0.15s ease;
}

.btn:active { transform: translateY(1px); }

.btn-primary {
  background: var(--secondary-color);
  color: white;
  border-color: rgba(0,0,0,0.05);
  box-shadow: 0 2px 6px rgba(0,0,0,0.10);
}

.btn-primary:hover { box-shadow: 0 4px 12px rgba(0,0,0,0.14); }

.collapsible-body { margin-top: 1rem; }

.inverter-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

@media (min-width: 900px) {
  .inverter-grid { grid-template-columns: repeat(2, 1fr); }
}

.inverter-bigloads {
  margin-top: 0.5rem;
  padding: 0.9rem;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  background: #fafafa;
}

.inverter-bigloads .label {
  display: block;
  font-weight: 700;
  opacity: 0.9;
  margin-bottom: 0.5rem;
}

.check-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem 1.2rem;
  align-items: center;
}

.check-row input[type="checkbox"] {
  transform: scale(1.15);
  margin-right: 0.35rem;
}

.inverter-results { margin-top: 1rem; }

.confidence { margin: 0.75rem 0 1rem 0; }

.confidence .label {
  display: block;
  font-weight: 700;
  opacity: 0.9;
  margin-bottom: 0.35rem;
}

.confidence-bar {
  width: 100%;
  height: 10px;
  border-radius: 999px;
  background: #e9ecef;
  border: 1px solid var(--border-color);
  overflow: hidden;
}

.confidence-fill {
  height: 100%;
  background: var(--secondary-color);
  width: 0%;
}

.confidence-text {
  display: inline-block;
  margin-top: 0.35rem;
  font-size: 0.9rem;
  opacity: 0.85;
}

.option-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.9rem;
}

@media (min-width: 900px) {
  .option-cards { grid-template-columns: repeat(3, 1fr); }
}

.option-card {
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 0.9rem;
  background: white;
}

.option-card .tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.15rem 0.55rem;
  border-radius: 999px;
  background: #eef5ff;
  border: 1px solid #cfe2ff;
  margin-bottom: 0.5rem;
}

.option-card h3 {
  font-family: 'Montserrat', sans-serif;
  margin: 0 0 0.4rem 0;
  font-size: 1.05rem;
  color: var(--primary-color);
}

.option-card .kv {
  font-weight: 800;
  color: var(--secondary-color);
  margin-bottom: 0.45rem;
}

.option-card ul {
  margin: 0.4rem 0 0 1.1rem;
  padding: 0;
  font-size: 0.9rem;
  line-height: 1.35;
  opacity: 0.92;
}

.installer-checks {
  margin-top: 1rem;
  padding-top: 0.9rem;
  border-top: 1px solid var(--border-color);
  font-size: 0.92rem;
  line-height: 1.4;
}

.installer-checks strong {
  display: block;
  margin-bottom: 0.35rem;
}

/* Ad slots (reserve space to reduce layout shift) */
.ad-slot {
  width: 100%;
  border: 1px solid var(--border-color);
  border-radius: 14px;
  background: #ffffff;
  box-shadow: 0 2px 6px rgba(0,0,0,0.06);
}

.ad-inner {
  padding: 0.9rem;
}

.ad-label {
  font-size: 0.75rem;
  opacity: 0.7;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

.ad-top { min-height: 110px; }     /* reserves space for desktop leaderboard */
.ad-mid { min-height: 290px; }     /* common responsive ad height */
.ad-bottom { min-height: 290px; }  /* common responsive ad height */

.ad-desktop-only { display: none; }
@media (min-width: 900px) {
  .ad-desktop-only { display: block; }
}

.ad-slot ins.adsbygoogle {
  display: block;
  width: 100%;
}



/* --- Lightweight inline SVG icons (replaces Font Awesome) --- */
.icon {
  width: 1em;
  height: 1em;
  vertical-align: -0.12em;
  margin-right: 0.5rem;
  color: var(--secondary-color);
}

/* --- Quick start --- */
.quickstart {
  margin: 0.9rem 0 1.2rem 0;
  border: 1px solid var(--border-color);
  background: #ffffff;
  border-radius: 14px;
  padding: 1rem;
  box-shadow: 0 4px 12px rgba(0,0,0,0.06);
}

.quickstart-inner {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.quickstart-row {
  display: flex;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
}


.quickstart-title {
  font-family: 'Montserrat', sans-serif;
  font-size: 1.1rem;
  margin: 0 0 0.2rem 0;
  color: var(--primary-color);
}

.quickstart-subtitle {
  margin: 0;
  opacity: 0.85;
  font-size: 0.95rem;
}

.quickstart-actions {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.qs-btn {
  border: 1px solid var(--border-color);
  background: #f8f9fa;
  color: var(--primary-color);
  padding: 0.65rem 0.9rem;
  border-radius: 12px;
  font-weight: 800;
  cursor: pointer;
  transition: transform 0.05s ease, box-shadow 0.15s ease;
}

.qs-btn-secondary {
  background: #ffffff;
  color: var(--primary-color);
}

.qs-btn-secondary:hover {
  box-shadow: 0 4px 12px rgba(0,0,0,0.10);
}

.qs-btn:hover { box-shadow: 0 4px 12px rgba(0,0,0,0.10); }
.qs-btn:active { transform: translateY(1px); }

/* --- Appliance toolbar + categories --- */
.appliance-toolbar {
  display: flex;
  gap: 0.9rem;
  align-items: flex-end;
  justify-content: space-between;
  flex-wrap: wrap;
  margin: 0.6rem 0 0.8rem 0;
}

.appliance-search input[type="search"]{
  width: min(520px, 100%);
  padding: 0.65rem 0.85rem;
  border: 1px solid var(--border-color);
  border-radius: 12px;
  outline: none;
}

.appliance-toolbar-actions {
  display: flex;
  gap: 0.9rem;
  align-items: center;
  flex-wrap: wrap;
}

.checkbox-inline {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-weight: 700;
  opacity: 0.9;
}

.btn-light {
  background: #ffffff;
  color: var(--text-color);
  border: 1px solid var(--border-color);
  box-shadow: none;
}

.appliance-toolbar-buttons {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

/* category containers */
.appliance-category {
  border: 1px solid var(--border-color);
  border-radius: 12px;
  margin-bottom: 0.7rem;
  background: #ffffff;
  overflow: hidden;
}

.appliance-category summary {
  cursor: pointer;
  padding: 0.75rem 0.85rem;
  font-weight: 900;
  color: var(--primary-color);
  background: #fafafa;
  border-bottom: 1px solid var(--border-color);
  list-style: none;
}

.appliance-category summary::-webkit-details-marker { display:none; }

.appliance-category .category-meta {
  font-weight: 700;
  opacity: 0.75;
  margin-left: 0.5rem;
  font-size: 0.85rem;
}

.appliance-category .category-body {
  padding: 0.35rem 0.5rem 0.6rem 0.5rem;
}

/* Sticky banner action */
.banner-action {
  margin-left: auto;
  display: flex;
  align-items: center;
}
.banner-action .btn {
  white-space: nowrap;
}

.btn-secondary {
  background: var(--primary-color);
  color: white;
  border-color: rgba(0,0,0,0.05);
}

/* Toast */
.toast {
  position: fixed;
  left: 50%;
  transform: translateX(-50%);
  bottom: 22px;
  background: rgba(0,0,0,0.85);
  color: white;
  padding: 0.65rem 0.85rem;
  border-radius: 12px;
  font-weight: 700;
  z-index: 9999;
  max-width: calc(100% - 32px);
}

/* sr-only for accessibility */
.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;
}

/* --- SEO content blocks --- */
.seo-content {
  margin-top: 1.2rem;
  padding: 1.1rem;
  border: 1px solid var(--border-color);
  background: #ffffff;
  border-radius: 14px;
}

.seo-content h2 {
  font-family: 'Montserrat', sans-serif;
  margin: 0 0 0.6rem 0;
  color: var(--primary-color);
}

.seo-block {
  margin-top: 1rem;
  padding-top: 0.9rem;
  border-top: 1px solid var(--border-color);
}

.seo-block h3 {
  margin: 0 0 0.5rem 0;
  color: var(--primary-color);
}

.seo-content details {
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 0.65rem 0.85rem;
  background: #fafafa;
  margin: 0.55rem 0;
}

.seo-content details summary {
  cursor: pointer;
  font-weight: 900;
}

.seo-note {
  opacity: 0.9;
  margin-top: 0.6rem;
}

.seo-content dl {
  margin: 0.4rem 0 0 0;
}

.seo-content dt {
  font-weight: 900;
  margin-top: 0.7rem;
}

.seo-content dd {
  margin: 0.2rem 0 0 0;
  opacity: 0.92;
}