/* ==========================================================================
   Siricharoen Gas - Design System & Modern CSS Variables (Light & Dark Theme)
   ========================================================================== */

:root {
  /* Branding Design Tokens (PTT Gas Cylinder Teal Theme) */
  --accent-teal: #00897b; /* Signature Teal */
  --accent-teal-hover: #00796b;
  --accent-teal-glow: rgba(0, 137, 123, 0.2);
  
  --accent-blue: #0284c7;
  --accent-amber: #d97706;
  --accent-red: #dc2626;
  
  --font-main: 'Outfit', 'Sarabun', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-theme: background-color 0.5s ease, border-color 0.5s ease, color 0.3s ease, box-shadow 0.5s ease;
  --transition-fast: all 0.2s ease;
  --border-radius-lg: 16px;
  --border-radius-md: 12px;
  --border-radius-sm: 8px;

  /* DEFAULT LIGHT THEME VARIABLES */
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f1f5f9;
  --bg-glass: rgba(255, 255, 255, 0.8);
  --border-glass: rgba(0, 0, 0, 0.08);
  --border-glass-hover: rgba(0, 137, 123, 0.3);
  
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  
  --shadow-premium: 0 10px 30px -10px rgba(0, 0, 0, 0.08), 0 1px 3px rgba(0, 0, 0, 0.03);
  --hero-overlay: linear-gradient(rgba(248, 250, 252, 0.8) 0%, rgba(248, 250, 252, 0.95) 100%);
  --preview-box-bg: #f8fafc;
}

/* DARK THEME OVERRIDES */
body.dark-theme {
  --bg-primary: #070a13;
  --bg-secondary: #0e1322;
  --bg-tertiary: #171d34;
  --bg-glass: rgba(14, 19, 34, 0.8);
  --border-glass: rgba(255, 255, 255, 0.07);
  --border-glass-hover: rgba(0, 137, 123, 0.4);
  
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  --shadow-premium: 0 20px 40px -15px rgba(0, 0, 0, 0.5);
  --hero-overlay: linear-gradient(rgba(7, 10, 19, 0.8) 0%, rgba(7, 10, 19, 0.95) 100%);
  --preview-box-bg: #121829;
}

/* ==========================================================================
   Reset & Base Styles
   ========================================================================== */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
  font-size: 16px;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-main);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: var(--transition-theme);
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 10px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: var(--bg-tertiary);
  border: 2px solid var(--bg-primary);
  border-radius: 5px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent-teal);
}

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition-fast);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Utilities */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.text-gradient-teal {
  background: linear-gradient(135deg, var(--text-primary) 30%, var(--accent-teal) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.glow-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background: linear-gradient(135deg, var(--accent-teal) 0%, #00796b 100%);
  color: #fff;
  padding: 14px 28px;
  font-size: 1rem;
  font-weight: 600;
  border-radius: 30px;
  border: none;
  cursor: pointer;
  box-shadow: 0 8px 24px var(--accent-teal-glow);
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.glow-btn::after {
  content: '';
  position: absolute;
  top: 0;
  left: -50%;
  width: 200%;
  height: 100%;
  background: linear-gradient(to right, transparent, rgba(255, 255, 255, 0.2), transparent);
  transform: skewX(-25deg);
  transition: 0.75s ease-in-out;
}

.glow-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 30px var(--accent-teal-glow), 0 0 15px rgba(0, 137, 123, 0.4);
}

.glow-btn:hover::after {
  left: 125%;
}

.secondary-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--border-glass);
  background: var(--bg-tertiary);
  color: var(--text-primary);
  padding: 14px 28px;
  font-size: 1rem;
  font-weight: 600;
  border-radius: 30px;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.secondary-btn:hover {
  background: var(--border-glass);
  border-color: var(--text-secondary);
}

.badge {
  display: inline-block;
  padding: 6px 12px;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: 20px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-glass);
  transition: var(--transition-theme);
}

.badge.teal {
  color: var(--accent-teal);
  background: rgba(0, 137, 123, 0.1);
  border-color: rgba(0, 137, 123, 0.2);
}

.badge.blue {
  color: var(--accent-blue);
  background: rgba(2, 132, 199, 0.1);
  border-color: rgba(2, 132, 199, 0.2);
}

.badge.amber {
  color: var(--accent-amber);
  background: rgba(217, 119, 6, 0.1);
  border-color: rgba(217, 119, 6, 0.2);
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */

header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 90px;
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-glass);
  z-index: 1000;
  display: flex;
  align-items: center;
  transition: var(--transition-theme), height 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.4rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.logo-flame {
  width: 28px;
  height: 28px;
  background: radial-gradient(circle at 50% 80%, var(--accent-teal), transparent 70%), 
              radial-gradient(circle at 50% 50%, var(--accent-blue), transparent 75%);
  border-radius: 50% 50% 20% 50%;
  transform: rotate(-45deg);
  display: inline-block;
  box-shadow: 0 0 10px rgba(0, 137, 123, 0.5);
  animation: flame-pulse 2.5s infinite ease-in-out;
}

@keyframes flame-pulse {
  0%, 100% { transform: rotate(-45deg) scale(1); opacity: 0.8; }
  50% { transform: rotate(-42deg) scale(1.1); opacity: 1; }
}

.nav-links {
  display: flex;
  gap: 32px;
  align-items: center;
  list-style: none;
}

.nav-links a {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.nav-links a:hover {
  color: var(--accent-teal);
}

.header-right {
  display: flex;
  align-items: center;
  gap: 20px;
}

/* Theme Toggle Button */
.theme-toggle-btn {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-glass);
  color: var(--text-primary);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-smooth);
}

.theme-toggle-btn:hover {
  background: var(--border-glass);
  transform: scale(1.05);
}

.theme-toggle-btn svg {
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: var(--transition-fast);
}

/* Theme Icon toggling class states */
body.dark-theme .sun-icon {
  display: block;
}
body.dark-theme .moon-icon {
  display: none;
}
body:not(.dark-theme) .sun-icon {
  display: none;
}
body:not(.dark-theme) .moon-icon {
  display: block;
}

.header-cta {
  display: flex;
  align-items: center;
  gap: 16px;
}

.phone-badge {
  display: flex;
  flex-direction: column;
  text-align: right;
}

.phone-badge span:first-child {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.phone-badge span:last-child {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent-teal);
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
}

/* Shrinking Header on Scroll Native Support */
@supports ((animation-timeline: scroll()) and (animation-range: 0% 100%)) {
  @keyframes shrink-header {
    to {
      height: 64px;
      box-shadow: 0 10px 30px rgba(0,0,0,0.05);
    }
  }

  header {
    animation: shrink-header auto linear both;
    animation-timeline: scroll(block root);
    animation-range: 0px 100px;
  }
}

/* ==========================================================================
   Hero Section
   ========================================================================== */

.hero {
  position: relative;
  min-height: 90vh;
  display: flex;
  align-items: center;
  padding-top: 100px;
  overflow: hidden;
  background: radial-gradient(circle at 80% 20%, rgba(0, 137, 123, 0.06), transparent 50%),
              radial-gradient(circle at 20% 80%, rgba(2, 132, 199, 0.06), transparent 50%);
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  background-image: var(--hero-overlay), url('assets/img/hero_background.jpg');
  background-size: cover;
  background-position: center;
  transform: scale(1.02);
  transition: var(--transition-theme);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 48px;
  align-items: center;
}

.hero-content {
  opacity: 0;
  transform: translateY(30px);
  animation: fade-in-up 1s forwards cubic-bezier(0.16, 1, 0.3, 1) 0.2s;
}

@keyframes fade-in-up {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(0, 137, 123, 0.08);
  border: 1px solid rgba(0, 137, 123, 0.15);
  color: var(--accent-teal);
  padding: 8px 16px;
  border-radius: 30px;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 24px;
}

.hero-tag svg {
  fill: currentColor;
}

.hero-title {
  font-size: 3.8rem;
  line-height: 1.4;
  font-weight: 800;
  letter-spacing: 0;
  margin-bottom: 20px;
}

.hero-title span {
  display: block;
  margin-bottom: 4px;
}

.hero-description {
  font-size: 1.15rem;
  color: var(--text-secondary);
  margin-bottom: 40px;
  max-width: 580px;
}

.hero-ctas {
  display: flex;
  gap: 20px;
  align-items: center;
}

.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  opacity: 0;
  transform: scale(0.9);
  animation: fade-in-scale 1.2s forwards cubic-bezier(0.16, 1, 0.3, 1) 0.4s;
}

.hero-visual-glow {
  position: absolute;
  width: 320px;
  height: 320px;
  background: radial-gradient(circle, var(--accent-teal-glow) 0%, transparent 70%);
  z-index: -1;
  filter: blur(20px);
  animation: slow-pulse 4s infinite alternate ease-in-out;
}

@keyframes slow-pulse {
  0% { transform: scale(0.9); opacity: 0.5; }
  100% { transform: scale(1.1); opacity: 0.9; }
}

.hero-cylinder-img {
  width: 250px;
  filter: drop-shadow(0 15px 30px rgba(0, 0, 0, 0.15));
  animation: float 6s infinite ease-in-out;
}

body.dark-theme .hero-cylinder-img {
  filter: drop-shadow(0 25px 50px rgba(0, 0, 0, 0.6));
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

/* ==========================================================================
   Ordering Section & Widget
   ========================================================================== */

.section-padding {
  padding: 100px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.section-subtitle {
  color: var(--accent-teal);
  font-size: 0.95rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 12px;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.section-desc {
  max-width: 600px;
  color: var(--text-secondary);
  font-size: 1.1rem;
}

.order-widget-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 40px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-glass);
  border-radius: var(--border-radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-premium);
  position: relative;
  overflow: hidden;
  transition: var(--transition-theme);
}

.order-widget-grid::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(0, 137, 123, 0.03) 0%, transparent 70%);
  z-index: 0;
  pointer-events: none;
}

.widget-configurator {
  display: flex;
  flex-direction: column;
  gap: 32px;
  z-index: 1;
}

.config-group-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.config-group-title span:first-child {
  background: var(--accent-teal);
  color: #fff;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 800;
}

.config-options {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 16px;
}

.config-card {
  background: var(--bg-tertiary);
  border: 2px solid transparent;
  border-radius: var(--border-radius-md);
  padding: 18px;
  cursor: pointer;
  text-align: center;
  transition: var(--transition-smooth), var(--transition-theme);
  user-select: none;
}

.config-card:hover {
  background: var(--border-glass);
  transform: translateY(-2px);
  border-color: rgba(0, 137, 123, 0.15);
}

.config-card.active {
  background: rgba(0, 137, 123, 0.05);
  border-color: var(--accent-teal);
  box-shadow: 0 4px 20px var(--accent-teal-glow);
}

.config-card h4 {
  font-size: 1rem;
  font-weight: 700;
}

.config-card p {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

.cylinder-outline-svg {
  width: 40px;
  height: 48px;
  margin: 0 auto 10px;
  fill: var(--text-muted);
  transition: var(--transition-fast);
}

.config-card.active .cylinder-outline-svg {
  fill: var(--accent-teal);
  filter: drop-shadow(0 0 5px var(--accent-teal-glow));
}

/* Widget Summary */
.widget-summary-panel {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-glass);
  border-radius: var(--border-radius-md);
  padding: 30px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  z-index: 1;
  position: relative;
  transition: var(--transition-theme);
}

.summary-title {
  font-size: 1.25rem;
  font-weight: 700;
  border-bottom: 1px solid var(--border-glass);
  padding-bottom: 16px;
  margin-bottom: 20px;
}

.summary-details {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 30px;
}

.summary-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.summary-row .label {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.summary-row .value {
  font-weight: 700;
}

.summary-row .value.brand-badge {
  background: rgba(2, 132, 199, 0.1);
  color: var(--accent-blue);
  padding: 4px 10px;
  border-radius: 12px;
  font-size: 0.85rem;
}

.summary-row .value.size-badge {
  background: rgba(0, 137, 123, 0.1);
  color: var(--accent-teal);
  padding: 4px 10px;
  border-radius: 12px;
  font-size: 0.85rem;
}

.visual-preview-box {
  background: var(--preview-box-bg);
  border: 1px solid var(--border-glass);
  border-radius: var(--border-radius-sm);
  padding: 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: 30px;
  min-height: 170px;
  justify-content: center;
  transition: var(--transition-theme);
}

.visual-preview-box img {
  height: 120px;
  object-fit: contain;
  filter: drop-shadow(0 4px 8px rgba(0,0,0,0.1));
  transition: var(--transition-smooth);
}

.order-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.order-actions .glow-btn {
  width: 100%;
}

.order-actions .tel-sub-text {
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Product Showcase Section
   ========================================================================== */

.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
}

.product-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-glass);
  border-radius: var(--border-radius-lg);
  padding: 30px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  position: relative;
  overflow: hidden;
  transition: var(--transition-smooth), var(--transition-theme);
  box-shadow: var(--shadow-premium);
}

.product-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at 50% 120%, rgba(0, 137, 123, 0.03), transparent 60%);
  pointer-events: none;
}

.product-card:hover {
  transform: translateY(-8px);
  border-color: var(--border-glass-hover);
  box-shadow: var(--shadow-premium), 0 0 15px rgba(0, 137, 123, 0.08);
}

.product-image-container {
  height: 180px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  position: relative;
  width: 100%;
}

.product-image-container img {
  max-height: 100%;
  object-fit: contain;
  transition: var(--transition-smooth);
  filter: drop-shadow(0 4px 8px rgba(0,0,0,0.08));
}

.product-card:hover .product-image-container img {
  transform: scale(1.06) translateY(-5px);
}

.product-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.product-use {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 20px;
}

.product-specs {
  display: flex;
  gap: 16px;
  border-top: 1px solid var(--border-glass);
  padding-top: 16px;
  width: 100%;
  justify-content: center;
}

.spec-item {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.spec-item .label {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.spec-item .val {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
}

/* ==========================================================================
   About Us & Plants Section
   ========================================================================== */

.about-panel {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 60px;
  align-items: center;
  background: var(--bg-secondary);
  border: 1px solid var(--border-glass);
  border-radius: var(--border-radius-lg);
  padding: 50px;
  margin-bottom: 48px;
  box-shadow: var(--shadow-premium);
  position: relative;
  overflow: hidden;
  transition: var(--transition-theme);
}

.about-content {
  z-index: 1;
}

.about-title {
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 20px;
  line-height: 1.3;
}

.about-desc {
  color: var(--text-secondary);
  font-size: 1.1rem;
  margin-bottom: 24px;
}

.about-points {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.point-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.point-icon {
  background: rgba(0, 137, 123, 0.1);
  color: var(--accent-teal);
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  flex-shrink: 0;
  margin-top: 2px;
}

.point-text {
  font-size: 0.95rem;
  color: var(--text-primary);
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  z-index: 1;
}

.stat-card {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-glass);
  border-radius: var(--border-radius-md);
  padding: 30px 20px;
  text-align: center;
  transition: var(--transition-smooth), var(--transition-theme);
}

.stat-card:hover {
  border-color: var(--accent-teal);
  box-shadow: 0 10px 30px rgba(0, 137, 123, 0.05);
}

.stat-num {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--accent-teal);
  margin-bottom: 4px;
  line-height: 1.1;
}

.stat-lbl {
  font-size: 0.85rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Plant Locations */
.plants-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
}

.plant-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-glass);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-premium);
  transition: var(--transition-smooth), var(--transition-theme);
  display: flex;
  flex-direction: column;
}

.plant-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-glass-hover);
}

.plant-img-wrapper {
  height: 220px;
  overflow: hidden;
  position: relative;
  background: #000;
}

.plant-img-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.95;
  transition: var(--transition-smooth);
}

.plant-card:hover .plant-img-wrapper img {
  transform: scale(1.05);
  opacity: 1;
}

.plant-badge {
  position: absolute;
  top: 16px;
  left: 16px;
  background: var(--bg-glass);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: var(--text-primary);
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 700;
  border: 1px solid var(--border-glass);
}

.plant-info {
  padding: 30px;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.plant-title {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.plant-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.plant-contacts {
  display: flex;
  flex-direction: column;
  gap: 12px;
  border-top: 1px solid var(--border-glass);
  padding-top: 20px;
}

.contact-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  color: var(--accent-teal);
}

.contact-link:hover {
  color: var(--text-primary);
}

/* ==========================================================================
   Distributors Section
   ========================================================================== */

.distributor-logos {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 40px;
  margin-top: 20px;
  margin-bottom: 40px;
}

.logo-wrapper {
  background: var(--bg-secondary);
  border: 1px solid var(--border-glass);
  border-radius: var(--border-radius-md);
  padding: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 150px;
  height: 150px;
  transition: var(--transition-smooth), var(--transition-theme);
  box-shadow: var(--shadow-premium);
  overflow: hidden;
}

.logo-wrapper img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  border-radius: 50%;
  filter: grayscale(80%);
  transition: var(--transition-smooth);
}

.logo-wrapper:hover {
  border-color: var(--accent-teal);
  transform: translateY(-2px);
  box-shadow: var(--shadow-premium), 0 0 15px rgba(0, 137, 123, 0.1);
}

.logo-wrapper:hover img {
  filter: grayscale(0%);
}

.distributor-desc {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
  color: var(--text-secondary);
  font-size: 1rem;
}

/* ==========================================================================
   Contact & Feedback
   ========================================================================== */

.contact-panel {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 50px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-glass);
  border-radius: var(--border-radius-lg);
  padding: 50px;
  box-shadow: var(--shadow-premium);
  position: relative;
  overflow: hidden;
  transition: var(--transition-theme);
}

.contact-details {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.contact-info-block {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.info-item {
  display: flex;
  gap: 16px;
}

.info-icon-wrapper {
  width: 44px;
  height: 44px;
  border-radius: var(--border-radius-md);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-glass);
  color: var(--accent-teal);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: var(--transition-theme);
}

.info-text h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.info-text p, .info-text a {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.info-text a:hover {
  color: var(--accent-teal);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-group label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.form-control {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-glass);
  color: var(--text-primary);
  padding: 14px 18px;
  font-size: 0.95rem;
  font-family: inherit;
  border-radius: var(--border-radius-sm);
  transition: var(--transition-fast), var(--transition-theme);
  outline: none;
}

.form-control:focus {
  border-color: var(--accent-teal);
  box-shadow: 0 0 10px var(--accent-teal-glow);
  background: var(--bg-secondary);
}

textarea.form-control {
  resize: vertical;
  min-height: 120px;
}

.form-feedback {
  padding: 12px 18px;
  border-radius: var(--border-radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  display: none;
}

.form-feedback.success {
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.2);
  color: #10b981;
  display: block;
}

/* ==========================================================================
   Footer
   ========================================================================== */

footer {
  background: var(--bg-tertiary);
  border-top: 1px solid var(--border-glass);
  padding: 40px 0;
  text-align: center;
  font-size: 0.9rem;
  color: var(--text-muted);
  transition: var(--transition-theme);
}

footer p {
  margin-bottom: 8px;
}

footer .love {
  color: var(--accent-teal);
}

/* ==========================================================================
   Responsive Styles
   ========================================================================== */

@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 40px;
  }
  
  .hero-content {
    display: flex;
    flex-direction: column;
    align-items: center;
  }
  
  .hero-description {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-title {
    font-size: 3rem;
  }

  .hero-cylinder-img {
    width: 200px;
  }

  .order-widget-grid {
    grid-template-columns: 1fr;
  }

  .about-panel {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .plants-grid {
    grid-template-columns: 1fr;
  }

  .contact-panel {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

@media (max-width: 768px) {
  header {
    height: 70px;
  }

  .menu-toggle {
    display: block;
  }

  .nav-links {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-glass);
    flex-direction: column;
    padding: 30px;
    gap: 20px;
    transform: translateY(-150%);
    opacity: 0;
    pointer-events: none;
    transition: var(--transition-smooth), var(--transition-theme);
    z-index: 999;
  }

  .nav-links.active {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }

  .header-cta {
    display: none;
  }

  .hero {
    padding-top: 80px;
  }

  .hero-title {
    font-size: 2.4rem;
  }

  .section-title {
    font-size: 2rem;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .widget-configurator {
    gap: 24px;
  }

  .config-options {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ==========================================================================
   CSS Scroll Reveal Effects (Scroll-Driven Animations)
   ========================================================================== */

@media (prefers-reduced-motion: no-preference) {
  @supports ((animation-timeline: view()) and (animation-range: entry)) {
    @keyframes reveal-in {
      from {
        opacity: 0;
        transform: translateY(40px) scale(0.95);
      }
      to {
        opacity: 1;
        transform: translateY(0) scale(1);
      }
    }

    .scroll-reveal {
      animation: reveal-in auto linear both;
      animation-timeline: view();
      animation-range: entry 10% entry 40%;
    }
  }
}