/* ============================================
   EcoSolarEnergy.com.es — Styles
   Mobile-first · Zero dependencies · CWV-ready
   ============================================ */

/* --- CSS Custom Properties --- */
:root {
  --color-primary: #1a7a3a;
  --color-primary-dark: #145e2c;
  --color-primary-light: #e8f5e9;
  --color-secondary: #1565c0;
  --color-secondary-light: #e3f2fd;
  --color-accent: #f9a825;
  --color-accent-light: #fff8e1;
  --color-text: #212121;
  --color-text-light: #616161;
  --color-text-muted: #9e9e9e;
  --color-bg: #ffffff;
  --color-bg-alt: #f5f7f5;
  --color-bg-card: #ffffff;
  --color-border: #e0e0e0;
  --color-border-light: #eeeeee;
  --color-success: #2e7d32;
  --color-warning: #f57f17;
  --color-danger: #c62828;
  --color-star: #ff9800;
  --shadow-sm: 0 1px 3px rgba(0,0,0,.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,.1);
  --shadow-lg: 0 8px 30px rgba(0,0,0,.12);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --font-body: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-heading: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --max-width: 1200px;
  --header-h: 64px;
}

/* --- Reset --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-primary); text-decoration: none; transition: color .2s; }
a:hover { color: var(--color-primary-dark); }
ul, ol { list-style: none; }
button { cursor: pointer; font-family: inherit; }
table { border-collapse: collapse; width: 100%; }

/* --- Utilities --- */
.container { width: 100%; max-width: var(--max-width); margin: 0 auto; padding: 0 20px; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }
.text-center { text-align: center; }
.text-muted { color: var(--color-text-light); }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }

/* --- Header --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  height: var(--header-h);
  display: flex;
  align-items: center;
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.site-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
  white-space: nowrap;
}
.site-logo svg { flex-shrink: 0; }
.site-logo span { color: var(--color-accent); }

/* Nav */
.main-nav ul { display: flex; gap: 4px; flex-wrap: wrap; }
.main-nav a {
  display: block;
  padding: 8px 14px;
  font-size: .9rem;
  font-weight: 500;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  transition: background .2s, color .2s;
}
.main-nav a:hover,
.main-nav a[aria-current="page"] {
  background: var(--color-primary-light);
  color: var(--color-primary);
}

/* Mobile hamburger */
.nav-toggle { display: none; background: none; border: none; padding: 8px; }
.nav-toggle svg { width: 24px; height: 24px; stroke: var(--color-text); }

@media (max-width: 768px) {
  .nav-toggle { display: block; }
  .main-nav {
    display: none;
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: 12px 20px;
    box-shadow: var(--shadow-md);
  }
  .main-nav.is-open { display: block; }
  .main-nav ul { flex-direction: column; gap: 0; }
  .main-nav a { padding: 12px 16px; font-size: 1rem; }
}

/* --- Breadcrumbs --- */
.breadcrumbs {
  padding: 12px 0;
  font-size: .85rem;
  color: var(--color-text-muted);
}
.breadcrumbs ol { display: flex; flex-wrap: wrap; gap: 4px; }
.breadcrumbs li::after { content: "›"; margin-left: 4px; }
.breadcrumbs li:last-child::after { content: ""; }
.breadcrumbs a { color: var(--color-text-light); }
.breadcrumbs a:hover { color: var(--color-primary); }

/* --- Hero --- */
.hero {
  background: linear-gradient(135deg, var(--color-primary-light) 0%, #dcedc8 50%, var(--color-accent-light) 100%);
  background-image: url('/assets/img/hero-solar.svg');
  background-size: cover;
  background-position: center top;
  background-repeat: no-repeat;
  padding: 48px 0;
  text-align: center;
  position: relative;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,.82);
}
.hero .container {
  position: relative;
  z-index: 1;
}
.hero h1 {
  font-family: var(--font-heading);
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 800;
  color: var(--color-primary-dark);
  line-height: 1.2;
  margin-bottom: 16px;
}
.hero p {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--color-text-light);
  max-width: 680px;
  margin: 0 auto 24px;
}
.hero-badges {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--color-bg);
  padding: 6px 14px;
  border-radius: 20px;
  font-size: .85rem;
  font-weight: 600;
  color: var(--color-text);
  box-shadow: var(--shadow-sm);
}
.hero-badge svg { width: 16px; height: 16px; }

/* --- Sections --- */
.section { padding: 48px 0; }
.section--alt { background: var(--color-bg-alt); }
.section-header {
  text-align: center;
  margin-bottom: 36px;
}
.section-header h2 {
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
}
.section-header p {
  color: var(--color-text-light);
  max-width: 600px;
  margin: 0 auto;
}

/* --- Category Grid --- */
.cat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}
.cat-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  text-align: center;
  transition: transform .2s, box-shadow .2s;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}
.cat-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.cat-card-icon {
  width: 100%;
  max-height: 160px;
  border-radius: var(--radius-md) var(--radius-md) 0 0;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  font-size: 1.75rem;
}
.cat-card-icon img {
  width: 100%;
  height: 160px;
  object-fit: cover;
}
.cat-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text);
}
.cat-card p {
  font-size: .9rem;
  color: var(--color-text-light);
  flex-grow: 1;
}
.cat-card .btn { margin-top: 8px; }

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  font-size: .95rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-sm);
  transition: background .2s, transform .1s;
  text-align: center;
  justify-content: center;
}
.btn:active { transform: scale(.97); }
.btn--primary {
  background: var(--color-primary);
  color: #fff;
}
.btn--primary:hover { background: var(--color-primary-dark); color: #fff; }
.btn--amazon {
  background: #ff9900;
  color: #111;
}
.btn--amazon:hover { background: #e88a00; color: #111; }
.btn--outline {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}
.btn--outline:hover { background: var(--color-primary-light); }
.btn--sm { padding: 7px 14px; font-size: .85rem; }
.btn--block { width: 100%; }

/* --- Product Cards --- */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}
.product-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: box-shadow .2s, transform .2s;
  display: flex;
  flex-direction: column;
}
.product-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.product-card-badge {
  position: absolute;
  top: 12px;
  left: 12px;
  background: var(--color-primary);
  color: #fff;
  font-size: .75rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 12px;
  z-index: 1;
}
.product-card-img {
  position: relative;
  background: #fff;
  padding: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 210px;
  font-size: 3rem;
  overflow: hidden;
  border-bottom: 1px solid var(--color-border);
}
.product-card-img img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}
.product-card-body {
  padding: 16px;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.product-card-title {
  font-size: .95rem;
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.product-card-title a { color: inherit; }
.product-card-title a:hover { color: var(--color-primary); }
.product-card-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.product-card-rating {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: .85rem;
  color: var(--color-star);
  font-weight: 600;
}
.product-card-rating .stars { letter-spacing: 1px; }
.product-card-reviews { font-size: .8rem; color: var(--color-text-muted); }
.product-card-price {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-primary-dark);
}
.product-card-price small { font-size: .8rem; font-weight: 400; color: var(--color-text-muted); }
.product-card-features {
  font-size: .85rem;
  color: var(--color-text-light);
  padding-left: 16px;
}
.product-card-features li { margin-bottom: 4px; list-style: disc; }
.product-card-footer {
  padding: 12px 16px;
  border-top: 1px solid var(--color-border-light);
}

/* --- Comparison Table --- */
.table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin: 24px 0;
}
.comp-table {
  min-width: 700px;
  font-size: .9rem;
}
.comp-table thead { background: var(--color-primary); color: #fff; }
.comp-table th {
  padding: 12px 16px;
  font-weight: 600;
  text-align: left;
  white-space: nowrap;
}
.comp-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--color-border-light);
  vertical-align: middle;
}
.comp-table tbody tr:hover { background: var(--color-primary-light); }
.comp-table .price-cell {
  font-weight: 700;
  color: var(--color-primary-dark);
  white-space: nowrap;
}
.comp-table .rating-cell {
  color: var(--color-star);
  font-weight: 600;
}
.comp-table .product-name {
  font-weight: 600;
  max-width: 260px;
}
.comp-table .badge-best {
  display: inline-block;
  background: var(--color-accent);
  color: #111;
  font-size: .7rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 10px;
  margin-left: 6px;
  vertical-align: middle;
}

/* --- Pros / Cons Boxes --- */
.pros-cons { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin: 24px 0; }
@media (max-width: 600px) { .pros-cons { grid-template-columns: 1fr; } }
.pros-box, .cons-box {
  border-radius: var(--radius-md);
  padding: 20px;
}
.pros-box {
  background: #e8f5e9;
  border-left: 4px solid var(--color-success);
}
.cons-box {
  background: #fce4ec;
  border-left: 4px solid var(--color-danger);
}
.pros-box h4, .cons-box h4 {
  font-size: 1rem;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.pros-box ul, .cons-box ul { padding-left: 18px; }
.pros-box li, .cons-box li {
  list-style: disc;
  margin-bottom: 6px;
  font-size: .9rem;
  line-height: 1.5;
}

/* --- FAQ Accordion --- */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  margin-bottom: 8px;
  overflow: hidden;
}
.faq-question {
  width: 100%;
  background: var(--color-bg);
  border: none;
  padding: 16px 20px;
  font-size: 1rem;
  font-weight: 600;
  text-align: left;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  color: var(--color-text);
  transition: background .2s;
}
.faq-question:hover { background: var(--color-bg-alt); }
.faq-question::after {
  content: "+";
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
  flex-shrink: 0;
  transition: transform .2s;
}
.faq-item.is-open .faq-question::after { content: "−"; }
.faq-answer {
  display: none;
  padding: 0 20px 16px;
  font-size: .95rem;
  color: var(--color-text-light);
  line-height: 1.7;
}
.faq-item.is-open .faq-answer { display: block; }

/* --- Calculator Widget --- */
.calc-widget {
  background: var(--color-bg-card);
  border: 2px solid var(--color-primary);
  border-radius: var(--radius-lg);
  padding: 32px;
  max-width: 700px;
  margin: 0 auto;
}
.calc-widget h3 {
  font-size: 1.3rem;
  color: var(--color-primary);
  margin-bottom: 20px;
  text-align: center;
}
.calc-form { display: grid; gap: 16px; }
.calc-field label {
  display: block;
  font-size: .9rem;
  font-weight: 600;
  margin-bottom: 4px;
  color: var(--color-text);
}
.calc-field input,
.calc-field select {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-family: inherit;
  transition: border-color .2s;
}
.calc-field input:focus,
.calc-field select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(26,122,58,.15);
}
.calc-result {
  display: none;
  background: var(--color-primary-light);
  border-radius: var(--radius-md);
  padding: 20px;
  margin-top: 16px;
  text-align: center;
}
.calc-result.is-visible { display: block; }
.calc-result-number {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-primary-dark);
}
.calc-result-label {
  font-size: .95rem;
  color: var(--color-text-light);
  margin-top: 4px;
}
.calc-result-details {
  margin-top: 12px;
  font-size: .9rem;
  color: var(--color-text-light);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  text-align: left;
}
.calc-result-details dt { font-weight: 600; color: var(--color-text); }

/* --- Authority / Trust Section --- */
.trust-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  text-align: center;
}
.trust-item {
  padding: 24px 16px;
}
.trust-icon {
  font-size: 2rem;
  margin-bottom: 12px;
}
.trust-item h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 6px;
}
.trust-item p {
  font-size: .85rem;
  color: var(--color-text-light);
}

/* --- Silo Hub --- */
.silo-intro {
  max-width: 800px;
  margin: 0 auto 32px;
  text-align: center;
}
.silo-intro h1 {
  font-size: clamp(1.5rem, 3.5vw, 2.25rem);
  font-weight: 800;
  color: var(--color-text);
  margin-bottom: 12px;
}
.silo-intro p {
  font-size: 1.05rem;
  color: var(--color-text-light);
  line-height: 1.7;
}
.silo-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  margin-bottom: 32px;
}
.silo-nav a {
  padding: 8px 18px;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  font-size: .9rem;
  font-weight: 500;
  color: var(--color-text);
  transition: all .2s;
}
.silo-nav a:hover {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

/* Info boxes */
.info-box {
  background: var(--color-secondary-light);
  border-left: 4px solid var(--color-secondary);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  margin: 20px 0;
  font-size: .95rem;
}
.info-box strong { color: var(--color-secondary); }

/* --- CTA Banner --- */
.cta-banner {
  background: linear-gradient(135deg, var(--color-primary) 0%, #2e7d32 100%);
  color: #fff;
  padding: 40px 0;
  text-align: center;
}
.cta-banner h2 {
  font-size: clamp(1.3rem, 3vw, 1.75rem);
  font-weight: 700;
  margin-bottom: 12px;
}
.cta-banner p {
  font-size: 1rem;
  opacity: .9;
  margin-bottom: 20px;
  max-width: 550px;
  margin-left: auto;
  margin-right: auto;
}
.cta-banner .btn--amazon {
  font-size: 1.05rem;
  padding: 12px 28px;
}

/* --- Footer --- */
.site-footer {
  background: #1b1b1b;
  color: #ccc;
  padding: 48px 0 24px;
  font-size: .9rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 32px;
  margin-bottom: 32px;
}
.footer-col h4 {
  color: #fff;
  font-size: 1rem;
  margin-bottom: 12px;
}
.footer-col ul { display: flex; flex-direction: column; gap: 8px; }
.footer-col a { color: #aaa; transition: color .2s; }
.footer-col a:hover { color: var(--color-accent); }
.footer-bottom {
  border-top: 1px solid #333;
  padding-top: 20px;
  text-align: center;
  font-size: .8rem;
  color: #888;
}
.footer-bottom a { color: #aaa; }
.footer-affiliate {
  font-size: .75rem;
  color: #666;
  margin-top: 8px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* --- Misc --- */
.updated-date {
  display: inline-block;
  font-size: .8rem;
  color: var(--color-text-muted);
  margin-bottom: 16px;
}
.tag {
  display: inline-block;
  background: var(--color-bg-alt);
  padding: 3px 10px;
  border-radius: 12px;
  font-size: .8rem;
  color: var(--color-text-light);
}

/* Content typography */
.content h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text);
  margin: 32px 0 12px;
}
.content h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin: 24px 0 10px;
}
.content p {
  margin-bottom: 16px;
}
.content ul, .content ol {
  padding-left: 24px;
  margin-bottom: 16px;
}
.content li {
  list-style: disc;
  margin-bottom: 6px;
}
.content ol li { list-style: decimal; }