/* ==========================================================================
   PERFECT ECOTECH - COMPONENT SYSTEM
   Header, Nav, Footer, Buttons, Cards, Tabs, Forms, Badges
   Strict Rule: SMALLEST VISIBLE FONT IS 14PX (0.875rem)
   ========================================================================== */

/* --------------------------------------------------------------------------
   Header & Navigation
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: #FFFFFF;
  border-bottom: 2px solid var(--color-border);
  box-shadow: 0 2px 8px rgba(11, 42, 74, 0.06);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
}

.official-logo-mark {
  width: 38px;
  height: auto;
  max-height: 44px;
  object-fit: contain;
  flex-shrink: 0;
  display: block;
}

.footer-logo-wrap {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  margin-bottom: var(--spacing-3);
}

.footer-official-logo {
  width: 36px;
  height: auto;
  max-height: 40px;
  object-fit: contain;
  flex-shrink: 0;
  display: block;
}

.logo-text {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-size: var(--fs-md);
  font-weight: var(--fw-extrabold);
  color: var(--color-primary-navy);
  line-height: 1.15;
  letter-spacing: -0.01em;
}

.brand-subtext {
  font-size: var(--fs-xs); /* 14px */
  font-weight: var(--fw-semibold);
  color: var(--color-secondary);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.brand-tagline-dots {
  display: inline-flex;
  gap: 4px;
  margin-left: 2px;
}
.dot-water { color: var(--color-water); }
.dot-solar { color: var(--color-solar); }
.dot-power { color: var(--color-power); }

/* Desktop Navigation */
.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--spacing-6);
}

.nav-link {
  font-size: var(--fs-sm); /* 15px */
  font-weight: var(--fw-semibold);
  color: var(--color-heading);
  padding: var(--spacing-2) 0;
  position: relative;
  transition: color var(--transition-fast);
}

.nav-link:hover {
  color: var(--color-water);
}

.nav-link.active {
  color: var(--color-primary-navy);
  font-weight: var(--fw-extrabold);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 100%;
  height: 3px;
  background-color: var(--color-water);
  border-radius: var(--radius-pill);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-4);
}

/* Mobile Toggle */
.mobile-nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 8px;
  cursor: pointer;
  color: var(--color-heading);
}

.mobile-nav-toggle svg {
  display: block;
  width: 24px;
  height: 24px;
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-2);
  padding: 10px 22px;
  font-size: var(--fs-sm); /* 15px */
  font-weight: var(--fw-semibold);
  line-height: 1.4;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn-primary {
  background-color: var(--color-primary-navy);
  color: #FFFFFF;
}

.btn-primary:hover {
  background-color: var(--color-primary-navy-dark);
  color: #FFFFFF;
}

.btn-secondary {
  background-color: #FFFFFF;
  color: var(--color-heading);
  border-color: var(--color-border);
}

.btn-secondary:hover {
  background-color: var(--color-bg);
  border-color: var(--color-secondary);
  color: var(--color-heading);
}

.btn-water {
  background-color: var(--color-water);
  color: #FFFFFF;
}
.btn-water:hover {
  background-color: var(--color-water-dark);
  color: #FFFFFF;
}

.btn-solar {
  background-color: var(--color-solar);
  color: #FFFFFF;
}
.btn-solar:hover {
  background-color: var(--color-solar-dark);
  color: #FFFFFF;
}

.btn-power {
  background-color: var(--color-power);
  color: #FFFFFF;
}
.btn-power:hover {
  background-color: var(--color-power-dark);
  color: #FFFFFF;
}

.btn-sm {
  padding: 8px 16px;
  font-size: var(--fs-xs); /* 14px */
}

.btn-lg {
  padding: 14px 28px;
  font-size: var(--fs-base); /* 16px */
  font-weight: var(--fw-bold);
}

.btn-block {
  display: flex;
  width: 100%;
}

/* --------------------------------------------------------------------------
   Section Headers
   -------------------------------------------------------------------------- */
.section-header {
  margin-bottom: var(--spacing-10);
}

.section-header.text-center {
  text-align: center;
  max-width: 760px;
  margin-left: auto;
  margin-right: auto;
}

.section-tag {
  display: inline-block;
  font-size: var(--fs-xs); /* 14px */
  font-weight: var(--fw-bold);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-water);
  margin-bottom: var(--spacing-2);
}

.section-tag.tag-solar { color: var(--color-solar); }
.section-tag.tag-power { color: var(--color-power); }

.section-title {
  font-size: var(--fs-3xl);
  font-weight: var(--fw-bold);
  color: var(--color-heading);
  margin-bottom: var(--spacing-3);
}

.section-subtitle {
  font-size: var(--fs-md); /* 18px */
  color: var(--color-body);
  line-height: var(--lh-body);
}

/* --------------------------------------------------------------------------
   Cards
   -------------------------------------------------------------------------- */
.card {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-6);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.card:hover {
  box-shadow: var(--shadow-md);
  border-color: #CBD5E1;
}

/* Product Card */
.product-card {
  display: flex;
  flex-direction: column;
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-top: 3px solid var(--color-water);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
}

.product-card[data-category="water"] {
  border-top-color: var(--color-water);
}

.product-card[data-category="solar"] {
  border-top-color: var(--color-solar);
}

.product-card[data-category="power"] {
  border-top-color: var(--color-power);
}

.product-card:hover {
  box-shadow: var(--shadow-md);
  border-color: #CBD5E1;
  transform: translateY(-2px);
}

.product-card-media {
  position: relative;
  background-color: #F8FAFC;
  height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border-bottom: 1px solid var(--color-border-light);
}

.product-card-media img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 8px;
  transition: transform 0.3s ease;
}

.product-card:hover .product-card-media img {
  transform: scale(1.02);
}

.product-card-badge {
  position: absolute;
  top: 12px;
  left: 12px;
  font-size: var(--fs-xs); /* 14px */
  font-weight: var(--fw-bold);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.badge-water {
  background-color: var(--color-water-light);
  color: var(--color-water-dark);
  border: 1px solid rgba(8, 121, 201, 0.3);
}

.badge-solar {
  background-color: var(--color-solar-light);
  color: var(--color-solar-dark);
  border: 1px solid rgba(53, 168, 83, 0.3);
}

.badge-power {
  background-color: var(--color-power-light);
  color: var(--color-power-dark);
  border: 1px solid rgba(245, 124, 0, 0.3);
}

.badge-navy {
  background-color: rgba(11, 42, 74, 0.1);
  color: var(--color-primary-navy);
  border: 1px solid rgba(11, 42, 74, 0.25);
}

.product-card-body {
  padding: var(--spacing-5);
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.product-card-title {
  font-size: var(--fs-lg); /* 20px */
  font-weight: var(--fw-bold);
  margin-bottom: var(--spacing-2);
  color: var(--color-heading);
}

.product-card-desc {
  font-size: var(--fs-xs); /* 14px */
  color: var(--color-body);
  line-height: 1.55;
  margin-bottom: var(--spacing-4);
  flex-grow: 1;
}

.product-card-meta {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-sm);
  padding: var(--spacing-3);
  margin-bottom: var(--spacing-4);
  font-size: var(--fs-xs); /* 14px */
}

.meta-row {
  display: flex;
  justify-content: space-between;
  margin-bottom: var(--spacing-1);
}

.meta-row:last-child {
  margin-bottom: 0;
}

.meta-label {
  font-weight: var(--fw-semibold);
  color: var(--color-secondary);
}

.meta-value {
  color: var(--color-heading);
  font-weight: var(--fw-medium);
  text-align: right;
}

.product-card-footer {
  margin-top: auto;
}

/* Service Card */
.service-card {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-primary-navy);
  border-radius: var(--radius-md);
  padding: var(--spacing-6);
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.service-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.service-card-water {
  border-left-color: var(--color-water);
}

.service-card-solar {
  border-left-color: var(--color-solar);
}

.service-card-power {
  border-left-color: var(--color-power);
}

.service-card-navy {
  border-left-color: var(--color-primary-navy);
}

.service-card-num {
  font-size: var(--fs-xs); /* 14px */
  font-weight: var(--fw-extrabold);
  color: var(--color-water);
  letter-spacing: 0.06em;
  margin-bottom: var(--spacing-2);
}

.service-card-solar .service-card-num {
  color: var(--color-solar);
}

.service-card-power .service-card-num {
  color: var(--color-power);
}

.service-card-navy .service-card-num {
  color: var(--color-primary-navy);
}

.service-card-title {
  font-size: var(--fs-xl); /* 24px */
  font-weight: var(--fw-bold);
  color: var(--color-heading);
  margin-bottom: var(--spacing-3);
}

.service-card-desc {
  font-size: var(--fs-base); /* 16px */
  color: var(--color-body);
  margin-bottom: var(--spacing-4);
  line-height: var(--lh-body);
}

.service-card-list {
  margin-bottom: var(--spacing-6);
  flex-grow: 1;
}

.service-card-list li {
  font-size: var(--fs-xs); /* 14px */
  color: var(--color-body);
  position: relative;
  padding-left: 20px;
  margin-bottom: var(--spacing-2);
  line-height: 1.5;
}

.service-card-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-solar);
  font-weight: var(--fw-bold);
}

/* Value / Feature Item */
.feature-box {
  background-color: #FFFFFF;
  border: 1px solid var(--color-border);
  border-top: 3px solid var(--color-primary-navy);
  border-radius: var(--radius-md);
  padding: var(--spacing-6);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.feature-box:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.feature-box-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background-color: var(--color-primary-navy);
  color: #FFFFFF;
  font-weight: var(--fw-extrabold);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-4);
}

.feature-box-title {
  font-size: var(--fs-lg); /* 20px */
  font-weight: var(--fw-bold);
  margin-bottom: var(--spacing-2);
  color: var(--color-heading);
}

.feature-box-desc {
  font-size: var(--fs-sm); /* 15px */
  color: var(--color-body);
  line-height: 1.6;
}

/* Category Filter Tabs */
.filter-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-2);
  margin-bottom: var(--spacing-8);
  justify-content: center;
}

.filter-tab {
  background-color: #FFFFFF;
  border: 1px solid var(--color-border);
  color: var(--color-heading);
  font-size: var(--fs-xs); /* 14px */
  font-weight: var(--fw-semibold);
  padding: 8px 18px;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-tab:hover {
  background-color: var(--color-bg);
  border-color: var(--color-secondary);
}

.filter-tab.active {
  background-color: var(--color-primary-navy);
  border-color: var(--color-primary-navy);
  color: #FFFFFF;
}

.filter-tab[data-category="water"].active {
  background-color: var(--color-water);
  border-color: var(--color-water);
  color: #FFFFFF;
}

.filter-tab[data-category="solar"].active {
  background-color: var(--color-solar);
  border-color: var(--color-solar);
  color: #FFFFFF;
}

.filter-tab[data-category="power"].active {
  background-color: var(--color-power);
  border-color: var(--color-power);
  color: #FFFFFF;
}

.filter-tab[data-category="maintenance"].active {
  background-color: var(--color-primary-navy);
  border-color: var(--color-primary-navy);
  color: #FFFFFF;
}

/* --------------------------------------------------------------------------
   CTA Section Banner
   -------------------------------------------------------------------------- */
.cta-banner {
  background-color: var(--color-primary-navy);
  color: #FFFFFF;
  border-radius: var(--radius-md);
  padding: var(--spacing-10) var(--spacing-8);
  text-align: center;
  box-shadow: var(--shadow-md);
}

.cta-banner h2 {
  color: #FFFFFF;
  font-size: var(--fs-2xl);
  margin-bottom: var(--spacing-3);
}

.cta-banner p {
  color: #CBD5E1;
  font-size: var(--fs-md);
  max-width: 680px;
  margin: 0 auto var(--spacing-6) auto;
}

/* --------------------------------------------------------------------------
   Forms
   -------------------------------------------------------------------------- */
.form-group {
  margin-bottom: var(--spacing-5);
}

.form-label {
  display: block;
  font-size: var(--fs-xs); /* 14px */
  font-weight: var(--fw-semibold);
  color: var(--color-heading);
  margin-bottom: var(--spacing-2);
}

.form-label .required {
  color: #DC2626;
  margin-left: 2px;
}

.form-control {
  width: 100%;
  padding: 12px 14px;
  font-size: var(--fs-base); /* 16px */
  line-height: 1.5;
  color: var(--color-heading);
  background-color: #FFFFFF;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-control:focus {
  border-color: var(--color-water);
  box-shadow: 0 0 0 3px rgba(8, 121, 201, 0.15);
  outline: none;
}

.form-control::placeholder {
  color: var(--color-secondary);
  font-size: var(--fs-sm); /* 15px */
}

textarea.form-control {
  min-height: 130px;
  resize: vertical;
}

.form-help {
  font-size: var(--fs-xs); /* 14px */
  color: var(--color-secondary);
  margin-top: var(--spacing-1);
}

/* --------------------------------------------------------------------------
   Gallery Item Card
   -------------------------------------------------------------------------- */
.gallery-card {
  background-color: #FFFFFF;
  border: 1px solid var(--color-border);
  border-top: 3px solid var(--color-water);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.gallery-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.gallery-card-water {
  border-top-color: var(--color-water);
  background-color: #FFFFFF;
}

.gallery-card-solar {
  border-top-color: var(--color-solar);
  background-color: #FFFFFF;
}

.gallery-card-power {
  border-top-color: var(--color-power);
  background-color: #FFFFFF;
}

.gallery-card-navy {
  border-top-color: var(--color-primary-navy);
  background-color: #FFFFFF;
}

.gallery-media {
  position: relative;
  height: 270px;
  background-color: #F1F5F9;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  border-bottom: 2px solid var(--color-border);
}

.gallery-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.gallery-card:hover .gallery-media img {
  transform: scale(1.03);
}

.gallery-content {
  padding: var(--spacing-5);
  flex-grow: 1;
}

.gallery-category {
  font-size: var(--fs-xs); /* 14px */
  font-weight: var(--fw-bold);
  color: var(--color-water);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--spacing-1);
}

.gallery-card-solar .gallery-category {
  color: var(--color-solar);
}

.gallery-card-power .gallery-category {
  color: var(--color-power);
}

.gallery-card-navy .gallery-category {
  color: var(--color-primary-navy);
}

.gallery-title {
  font-size: var(--fs-md); /* 18px */
  font-weight: var(--fw-bold);
  color: var(--color-heading);
  margin-bottom: var(--spacing-1);
}

.gallery-desc {
  font-size: var(--fs-xs); /* 14px */
  color: var(--color-body);
  line-height: 1.5;
}

/* --------------------------------------------------------------------------
   Blog Article Card
   -------------------------------------------------------------------------- */
.blog-card {
  background-color: #FFFFFF;
  border: 1px solid var(--color-border);
  border-top: 3px solid var(--color-water);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.blog-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.blog-card[data-category="water"] {
  border-top-color: var(--color-water);
}

.blog-card[data-category="solar"] {
  border-top-color: var(--color-solar);
}

.blog-card[data-category="power"] {
  border-top-color: var(--color-power);
}

.blog-card[data-category="maintenance"] {
  border-top-color: var(--color-primary-navy);
}

.blog-media {
  height: 190px;
  background-color: #F8FAFC;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  border-bottom: 1px solid var(--color-border-light);
}

.blog-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.blog-content {
  padding: var(--spacing-5);
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.blog-meta {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
  margin-bottom: var(--spacing-2);
  font-size: var(--fs-xs); /* 14px */
}

.blog-tag {
  font-weight: var(--fw-bold);
  color: var(--color-water);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.blog-tag-solar {
  color: var(--color-solar);
}

.blog-tag-power {
  color: var(--color-power);
}

.blog-tag-navy {
  color: var(--color-primary-navy);
}

.blog-title {
  font-size: var(--fs-lg); /* 20px */
  font-weight: var(--fw-bold);
  color: var(--color-heading);
  margin-bottom: var(--spacing-2);
  line-height: 1.35;
}

.blog-excerpt {
  font-size: var(--fs-xs); /* 14px */
  color: var(--color-body);
  line-height: 1.6;
  margin-bottom: var(--spacing-4);
  flex-grow: 1;
}

/* --------------------------------------------------------------------------
   Global Footer
   -------------------------------------------------------------------------- */
.site-footer {
  background-color: var(--color-primary-navy);
  color: #CBD5E1;
  padding-top: var(--spacing-16);
  padding-bottom: var(--spacing-8);
  border-top: 4px solid var(--color-water);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
  gap: var(--spacing-8);
  margin-bottom: var(--spacing-12);
}

.footer-brand-title {
  font-size: var(--fs-xl); /* 24px */
  font-weight: var(--fw-extrabold);
  color: #FFFFFF;
  margin-bottom: var(--spacing-1);
}

.footer-brand-sub {
  font-size: var(--fs-xs); /* 14px */
  font-weight: var(--fw-bold);
  letter-spacing: 0.06em;
  color: #94A3B8;
  text-transform: uppercase;
  margin-bottom: var(--spacing-3);
}

.footer-brand-desc {
  font-size: var(--fs-xs); /* 14px */
  line-height: 1.6;
  color: #CBD5E1;
  margin-bottom: var(--spacing-4);
}

.footer-heading {
  font-size: var(--fs-sm); /* 15px */
  font-weight: var(--fw-bold);
  color: #FFFFFF;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: var(--spacing-4);
}

.footer-links li {
  margin-bottom: var(--spacing-2);
}

.footer-links a {
  font-size: var(--fs-xs); /* 14px */
  color: #CBD5E1;
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: #FFFFFF;
  text-decoration: underline;
}

.footer-links a.link-water:hover {
  color: #38BDF8;
}

.footer-links a.link-solar:hover {
  color: #4ADE80;
}

.footer-links a.link-power:hover {
  color: #FB923C;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding-top: var(--spacing-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: var(--fs-xs); /* 14px */
  color: #94A3B8;
}

.social-links {
  display: flex;
  gap: var(--spacing-4);
}

.social-links a {
  color: #CBD5E1;
  font-size: var(--fs-xs); /* 14px */
}

.social-links a:hover {
  color: #FFFFFF;
}