@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&display=swap');

:root {
  --font-primary: 'Plus Jakarta Sans', sans-serif;
  --font-secondary: 'Outfit', sans-serif;

  /* Theme: Light */
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-card: rgba(255, 255, 255, 0.75);
  --bg-glass: rgba(255, 255, 255, 0.45);
  --bg-glass-active: rgba(255, 255, 255, 0.8);
  --border-color: rgba(226, 232, 240, 0.8);
  --border-glass: rgba(255, 255, 255, 0.6);
  
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  
  --color-primary: #0066ff;
  --color-primary-hover: #0052cc;
  --color-primary-light: rgba(0, 102, 255, 0.1);
  --color-cool: #00d2ff;
  --color-heat: #ff5e3a;
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-whatsapp: #25d366;
  --color-whatsapp-hover: #1ebd58;
  
  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 12px 24px rgba(0, 102, 255, 0.05);
  --shadow-lg: 0 20px 40px rgba(15, 23, 42, 0.05);
  --shadow-glow: 0 0 20px rgba(0, 102, 255, 0.2);
  --shadow-whatsapp: 0 8px 24px rgba(37, 211, 102, 0.3);
  
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 9999px;
  
  --blur: 16px;
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
  /* Theme: Dark */
  --bg-primary: #070a13;
  --bg-secondary: #0c111d;
  --bg-card: rgba(12, 17, 29, 0.7);
  --bg-glass: rgba(12, 17, 29, 0.45);
  --bg-glass-active: rgba(18, 24, 38, 0.85);
  --border-color: rgba(30, 41, 59, 0.8);
  --border-glass: rgba(255, 255, 255, 0.05);
  
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  --color-primary-light: rgba(0, 102, 255, 0.15);
  
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 12px 24px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 20px rgba(0, 130, 255, 0.25);
}

/* Reset & Base Styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-primary);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-secondary);
  font-weight: 700;
  line-height: 1.25;
}

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

button, input, select, textarea {
  font-family: inherit;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 10px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* Utility Classes & Containers */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

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

.text-gradient {
  background: linear-gradient(135deg, var(--color-primary), var(--color-cool));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.glass {
  background: var(--bg-glass);
  backdrop-filter: blur(var(--blur));
  -webkit-backdrop-filter: blur(var(--blur));
  border: 1px solid var(--border-glass);
  box-shadow: var(--shadow-md);
}

.glass-card {
  background: var(--bg-card);
  backdrop-filter: blur(var(--blur));
  -webkit-backdrop-filter: blur(var(--blur));
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
}

.glass-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(0, 102, 255, 0.2);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-full);
  font-family: var(--font-secondary);
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  transition: all var(--transition-normal);
  border: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), #004ecc);
  color: #ffffff;
  box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 25px rgba(0, 102, 255, 0.4);
}

.btn-secondary {
  background: var(--bg-glass);
  color: var(--text-primary);
  border: 1px solid var(--border-glass);
}

.btn-secondary:hover {
  background: var(--bg-glass-active);
  transform: translateY(-2px);
}

.btn-whatsapp {
  background: linear-gradient(135deg, var(--color-whatsapp), #1cba56);
  color: #ffffff;
  box-shadow: var(--shadow-whatsapp);
}

.btn-whatsapp:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(37, 211, 102, 0.5);
  background: var(--color-whatsapp-hover);
}

.btn-whatsapp-header {
  padding: 10px 20px;
  font-size: 14px;
  border-radius: var(--radius-full);
  background: var(--color-whatsapp);
  color: white;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  box-shadow: 0 4px 12px rgba(37, 211, 102, 0.2);
  font-weight: 600;
}

.btn-whatsapp-header:hover {
  background: var(--color-whatsapp-hover);
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(37, 211, 102, 0.35);
}

.btn-whatsapp-sm {
  padding: 10px 18px;
  font-size: 13.5px;
  border-radius: var(--radius-sm);
  background: var(--color-whatsapp);
  color: white;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  transition: all var(--transition-fast);
}

.btn-whatsapp-sm:hover {
  background: var(--color-whatsapp-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(37, 211, 102, 0.25);
}

.btn-phone-hero {
  background: var(--bg-glass);
  color: var(--text-primary);
  border: 1px solid var(--border-glass);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn-phone-hero:hover {
  background: var(--bg-glass-active);
  border-color: var(--color-primary);
  transform: translateY(-2px);
}

.btn-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  color: var(--text-primary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-icon:hover {
  background: var(--bg-glass-active);
  color: var(--color-primary);
}

/* Header & Navigation */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  height: 80px;
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--border-glass);
  transition: background-color var(--transition-normal), height var(--transition-normal);
}

header.scrolled {
  height: 70px;
  background: var(--bg-glass-active);
  backdrop-filter: blur(var(--blur));
  -webkit-backdrop-filter: blur(var(--blur));
  box-shadow: var(--shadow-sm);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-secondary);
  font-weight: 800;
  font-size: 24px;
  letter-spacing: -0.5px;
}

.logo svg {
  width: 32px;
  height: 32px;
  color: var(--color-primary);
}

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

.nav-links a {
  font-weight: 500;
  font-size: 15px;
  color: var(--text-secondary);
  position: relative;
  padding: 8px 0;
}

.nav-links a:hover {
  color: var(--text-primary);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width var(--transition-fast);
}

.nav-links a:hover::after {
  width: 100%;
}

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

/* Hero Section */
.hero {
  position: relative;
  min-height: 100vh;
  padding: 140px 0 80px 0;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: radial-gradient(circle at 80% 20%, var(--color-primary-light) 0%, transparent 50%),
              radial-gradient(circle at 10% 80%, rgba(0, 210, 255, 0.05) 0%, transparent 40%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 24px;
}

.hero-title {
  font-size: 56px;
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 24px;
  letter-spacing: -1.5px;
}

.hero-desc {
  font-size: 18px;
  color: var(--text-secondary);
  margin-bottom: 40px;
  max-width: 580px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 48px;
}

.hero-stats {
  display: flex;
  gap: 40px;
  border-top: 1px solid var(--border-color);
  padding-top: 32px;
}

.stat-item h4 {
  font-size: 32px;
  font-weight: 800;
  color: var(--color-primary);
}

.stat-item p {
  font-size: 14px;
  color: var(--text-secondary);
}

/* Interactive Mode Changer in Hero */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.interactive-ac-card {
  width: 100%;
  max-width: 440px;
  border-radius: var(--radius-lg);
  padding: 32px;
  position: relative;
  z-index: 10;
  transition: all var(--transition-slow);
}

.interactive-ac-card.mode-cool {
  background: linear-gradient(135deg, rgba(0, 210, 255, 0.15) 0%, rgba(12, 17, 29, 0.4) 100%);
  border-color: rgba(0, 210, 255, 0.3);
  box-shadow: 0 20px 40px rgba(0, 210, 255, 0.15);
}

.interactive-ac-card.mode-heat {
  background: linear-gradient(135deg, rgba(255, 94, 58, 0.15) 0%, rgba(12, 17, 29, 0.4) 100%);
  border-color: rgba(255, 94, 58, 0.3);
  box-shadow: 0 20px 40px rgba(255, 94, 58, 0.15);
}

.interactive-ac-card.mode-auto {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.15) 0%, rgba(12, 17, 29, 0.4) 100%);
  border-color: rgba(16, 185, 129, 0.3);
  box-shadow: 0 20px 40px rgba(16, 185, 129, 0.15);
}

.ac-image-container {
  position: relative;
  margin-bottom: 24px;
  text-align: center;
  perspective: 1000px;
}

.ac-img {
  width: 100%;
  max-width: 320px;
  height: auto;
  filter: drop-shadow(0 15px 25px rgba(0,0,0,0.15));
  transition: transform var(--transition-normal);
}

.ac-img:hover {
  transform: rotateY(-10deg) rotateX(5deg);
}

.temp-indicator {
  position: absolute;
  top: 15px;
  right: 40px;
  background: rgba(0,0,0,0.85);
  color: #00ff66;
  font-family: monospace;
  font-size: 16px;
  padding: 4px 8px;
  border-radius: 4px;
  border: 1px solid rgba(0, 255, 102, 0.3);
  letter-spacing: 1px;
}

.flow-particles {
  position: absolute;
  bottom: -15px;
  left: 10%;
  width: 80%;
  height: 40px;
  overflow: hidden;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
}

.active .flow-particles {
  opacity: 1;
}

.particle {
  position: absolute;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-cool);
  animation: blow 1.5s infinite linear;
}

.mode-cool .particle { background: var(--color-cool); }
.mode-heat .particle { background: var(--color-heat); }
.mode-auto .particle { background: var(--color-success); }

@keyframes blow {
  0% { transform: translateY(0) scale(1) rotate(0deg); opacity: 0; }
  20% { opacity: 0.8; }
  100% { transform: translateY(50px) scale(0.3) rotate(360deg); opacity: 0; }
}

.mode-selectors {
  display: flex;
  gap: 12px;
  justify-content: center;
}

.mode-btn {
  flex: 1;
  padding: 10px 0;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-glass);
  background: var(--bg-glass);
  color: var(--text-primary);
  font-weight: 600;
  font-size: 13px;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.mode-btn svg {
  width: 18px;
  height: 18px;
}

.mode-btn.active {
  border-color: var(--color-primary);
  box-shadow: 0 0 10px var(--color-primary-light);
}
.mode-btn[data-mode="cool"].active { background: rgba(0, 210, 255, 0.2); border-color: var(--color-cool); }
.mode-btn[data-mode="heat"].active { background: rgba(255, 94, 58, 0.2); border-color: var(--color-heat); }
.mode-btn[data-mode="auto"].active { background: rgba(10, 185, 129, 0.2); border-color: var(--color-success); }

/* Grid / Background Animations */
.pulse-glow {
  position: absolute;
  width: 350px;
  height: 350px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--color-primary-light) 0%, transparent 70%);
  filter: blur(40px);
  z-index: 1;
  animation: float-slow 10s infinite alternate;
}

@keyframes float-slow {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(40px, -40px) scale(1.1); }
}

/* Section Header */
.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 60px auto;
}

.section-tag {
  font-family: var(--font-secondary);
  font-weight: 700;
  text-transform: uppercase;
  font-size: 13px;
  color: var(--color-primary);
  letter-spacing: 1px;
  margin-bottom: 12px;
  display: inline-block;
}

.section-title {
  font-size: 40px;
  letter-spacing: -1px;
  margin-bottom: 16px;
}

.section-subtitle {
  color: var(--text-secondary);
  font-size: 16px;
}

/* Problems Grid (PAS) Section */
.problems-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 32px;
}

.problem-card {
  padding: 32px;
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
}

.problem-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(255, 94, 58, 0.2);
}

.problem-status {
  align-self: flex-start;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  margin-bottom: 20px;
}

.problem-status.error {
  background: rgba(255, 94, 58, 0.1);
  color: var(--color-heat);
}

.problem-status.warning {
  background: rgba(245, 158, 11, 0.1);
  color: var(--color-warning);
}

.problem-title {
  font-size: 20px;
  margin-bottom: 12px;
}

.problem-desc {
  color: var(--text-secondary);
  font-size: 14.5px;
  margin-bottom: 28px;
}

.problem-action {
  margin-top: auto;
  border-top: 1px solid var(--border-color);
  padding-top: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.problem-action span {
  font-size: 12.5px;
  color: var(--text-muted);
  font-weight: 500;
}

/* Clean Tech Section */
.clean-tech-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 60px;
  align-items: center;
}

.tech-steps {
  display: flex;
  flex-direction: column;
  gap: 24px;
  margin-top: 32px;
}

.tech-step-item {
  display: flex;
  gap: 18px;
  align-items: flex-start;
}

.step-num {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--color-primary);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-family: var(--font-secondary);
  flex-shrink: 0;
}

.tech-step-item h4 {
  font-size: 17px;
  margin-bottom: 4px;
}

.tech-step-item p {
  font-size: 14px;
  color: var(--text-secondary);
}

.clean-tech-visual svg {
  box-shadow: var(--shadow-md);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-glass);
}

/* Interactive Services Calculator */
.select-service-group {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px !important;
}

.select-service-group .btn-toggle {
  font-size: 13.5px;
  padding: 10px 8px;
}

.ac-type-group {
  display: flex;
  gap: 12px;
}

.calc-container {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 48px;
  align-items: start;
}

.calc-card {
  padding: 40px;
  border-radius: var(--radius-lg);
}

.input-group {
  margin-bottom: 32px;
}

.input-header {
  display: flex;
  justify-content: space-between;
  margin-bottom: 12px;
  font-weight: 600;
  font-size: 15px;
}

.input-header span:last-child {
  color: var(--color-primary);
}

.slider-container {
  position: relative;
}

input[type="range"] {
  -webkit-appearance: none;
  width: 100%;
  height: 6px;
  background: var(--border-color);
  border-radius: var(--radius-full);
  outline: none;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--color-primary);
  cursor: pointer;
  box-shadow: 0 0 10px rgba(0, 102, 255, 0.4);
  transition: transform var(--transition-fast);
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

.toggle-group {
  display: flex;
  gap: 16px;
}

.btn-toggle {
  flex: 1;
  padding: 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  background: var(--bg-secondary);
  color: var(--text-secondary);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-toggle.active {
  background: var(--color-primary-light);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.calc-results {
  position: sticky;
  top: 100px;
  padding: 40px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--color-primary-light) 0%, transparent 100%);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.result-ring {
  width: 180px;
  height: 180px;
  border-radius: 50%;
  border: 8px solid var(--border-color);
  border-top-color: var(--color-primary);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  margin-bottom: 32px;
  background: var(--bg-secondary);
  box-shadow: var(--shadow-md);
}

.result-val {
  font-size: 36px;
  font-weight: 800;
  color: var(--text-primary);
  font-family: var(--font-secondary);
  line-height: 1;
}

.result-unit {
  font-size: 13px;
  color: var(--text-secondary);
  font-weight: 500;
  margin-top: 4px;
}

.recommended-box {
  width: 100%;
  border-top: 1px solid var(--border-color);
  padding-top: 24px;
  text-align: left;
}

.recommended-box h4 {
  font-size: 16px;
  margin-bottom: 8px;
}

.recommended-box p {
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 20px;
}

/* Quiz Section */
.quiz-container {
  max-width: 800px;
  margin: 0 auto;
  border-radius: var(--radius-lg);
  padding: 48px;
  position: relative;
  overflow: hidden;
}

.quiz-progress {
  height: 4px;
  background: var(--border-color);
  border-radius: var(--radius-full);
  margin-bottom: 40px;
  position: relative;
}

.quiz-progress-bar {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  background: var(--color-primary);
  width: 25%;
  border-radius: var(--radius-full);
  transition: width var(--transition-normal);
}

.quiz-step {
  display: none;
}

.quiz-step.active {
  display: block;
  animation: slide-in 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes slide-in {
  from { opacity: 0; transform: translateX(20px); }
  to { opacity: 1; transform: translateX(0); }
}

.quiz-question {
  font-size: 24px;
  margin-bottom: 32px;
}

.quiz-options {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-bottom: 40px;
}

.option-card {
  padding: 24px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background: var(--bg-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 16px;
}

.option-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-2px);
}

.option-card.selected {
  border-color: var(--color-primary);
  background: var(--color-primary-light);
}

.option-circle {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: 2px solid var(--border-color);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.option-card.selected .option-circle {
  border-color: var(--color-primary);
}

.option-card.selected .option-circle::after {
  content: '';
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-primary);
  display: block;
}

.quiz-nav {
  display: flex;
  justify-content: space-between;
}

/* Testimonials / Reviews */
.reviews-slider {
  max-width: 800px;
  margin: 0 auto;
  position: relative;
  overflow: hidden;
  min-height: 250px;
}

.review-card {
  display: none;
  animation: fade-in 0.5s ease;
}

.review-card.active {
  display: block;
}

.review-text {
  font-size: 20px;
  font-style: italic;
  font-weight: 500;
  line-height: 1.5;
  margin-bottom: 24px;
  color: var(--text-primary);
}

.review-author {
  display: flex;
  align-items: center;
  gap: 16px;
}

.author-img {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  object-fit: cover;
}

.author-name {
  font-weight: 600;
  font-size: 16px;
}

.author-role {
  font-size: 13px;
  color: var(--text-muted);
}

.slider-nav {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-top: 40px;
}

/* Contact Section */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 60px;
  align-items: center;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.contact-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.contact-icon {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--color-primary-light);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-detail h4 {
  font-size: 16px;
  margin-bottom: 4px;
}

.contact-detail p {
  color: var(--text-secondary);
}

.contact-form {
  padding: 40px;
  border-radius: var(--radius-lg);
  position: relative;
}

.form-title {
  font-size: 28px;
  margin-bottom: 8px;
}

.form-subtitle {
  color: var(--text-secondary);
  font-size: 15px;
  margin-bottom: 32px;
}

.form-group {
  margin-bottom: 24px;
  position: relative;
}

.form-input {
  width: 100%;
  padding: 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  background: var(--bg-secondary);
  color: var(--text-primary);
  outline: none;
  font-size: 15px;
  transition: border-color var(--transition-fast);
}

.form-input:focus {
  border-color: var(--color-primary);
}

.form-group label {
  position: absolute;
  top: 16px;
  left: 16px;
  color: var(--text-muted);
  pointer-events: none;
  transition: all var(--transition-fast);
}

.form-input:focus ~ label,
.form-input:not(:placeholder-shown) ~ label {
  top: -10px;
  left: 10px;
  font-size: 12px;
  background: var(--bg-secondary);
  padding: 0 6px;
  color: var(--color-primary);
}

/* Success Overlay for forms */
.success-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 40px;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
  z-index: 10;
}

.success-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.success-icon {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: rgba(16, 185, 129, 0.1);
  color: var(--color-success);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
}

/* Footer */
footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 80px 0 32px 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: 40px;
  margin-bottom: 60px;
}

.footer-brand p {
  color: var(--text-secondary);
  margin-top: 16px;
  max-width: 280px;
}

.footer-col h5 {
  font-size: 16px;
  margin-bottom: 24px;
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-col a {
  color: var(--text-secondary);
  font-size: 14px;
}

.footer-col a:hover {
  color: var(--color-primary);
}

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 32px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}

.footer-bottom p {
  font-size: 14px;
  color: var(--text-muted);
}

.social-links {
  display: flex;
  gap: 16px;
}

/* Pulsating Floating WhatsApp Button */
.whatsapp-float-btn {
  position: fixed;
  bottom: 30px;
  right: 30px;
  z-index: 999;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: var(--color-whatsapp);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-whatsapp);
  transition: all 0.3s;
  animation: pulse-whatsapp 2s infinite;
}

.whatsapp-float-btn:hover {
  transform: scale(1.1);
  background: var(--color-whatsapp-hover);
}

@keyframes pulse-whatsapp {
  0% {
    box-shadow: 0 0 0 0 rgba(37, 211, 102, 0.7);
  }
  70% {
    box-shadow: 0 0 0 15px rgba(37, 211, 102, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(37, 211, 102, 0);
  }
}

/* Portfolio Gallery Section */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 32px;
}
.gallery-item {
  overflow: hidden;
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
}
.gallery-img-container {
  position: relative;
  height: 340px;
  overflow: hidden;
}
.gallery-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}
.gallery-item:hover .gallery-img {
  transform: scale(1.05);
}
.gallery-caption {
  padding: 24px;
  background: var(--bg-card);
  border-top: 1px solid var(--border-color);
}
.gallery-caption h4 {
  font-size: 18px;
  margin-bottom: 8px;
  color: var(--text-primary);
}
.gallery-caption p {
  font-size: 14.5px;
  color: var(--text-secondary);
}

/* Google Reviews Section */
.google-reviews-container {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 40px;
}
.google-review-card {
  display: flex;
  flex-direction: column;
  padding: 24px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}
.google-review-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.gr-header {
  display: flex;
  align-items: center;
  margin-bottom: 14px;
  position: relative;
}
.gr-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 700;
  margin-right: 14px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}
.gr-user-info {
  display: flex;
  flex-direction: column;
}
.gr-name {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0 0 2px 0;
  font-family: var(--font-secondary);
}
.gr-stats {
  font-size: 12px;
  color: var(--text-secondary);
  opacity: 0.8;
}
.gr-actions-dots {
  position: absolute;
  right: 0;
  top: 0;
  color: var(--text-secondary);
  opacity: 0.6;
  cursor: pointer;
  transition: opacity var(--transition-fast);
}
.gr-actions-dots:hover {
  opacity: 1;
}
.gr-rating-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
}
.gr-stars {
  color: #ffc107;
  font-size: 16px;
  letter-spacing: 2px;
}
.gr-date {
  font-size: 12px;
  color: var(--text-secondary);
  opacity: 0.8;
}
.gr-text {
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-secondary);
  margin: 0 0 24px 0;
  flex-grow: 1;
}
.gr-footer-actions {
  display: flex;
  gap: 20px;
  border-top: 1px solid var(--border-color);
  padding-top: 16px;
  margin-top: auto;
}
.gr-action-btn {
  background: none;
  border: none;
  font-size: 13px;
  font-weight: 700;
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  padding: 0;
  transition: color var(--transition-fast);
}
.gr-action-btn:hover {
  color: var(--color-primary);
}
.gr-action-btn svg {
  stroke: var(--text-secondary);
  opacity: 0.7;
  transition: stroke var(--transition-fast), opacity var(--transition-fast);
}
.gr-action-btn:hover svg {
  stroke: var(--color-primary);
  opacity: 1;
}

/* Professional Banner */
.reviews-bottom-note {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  background: rgba(16, 185, 129, 0.08);
  border: 1px dashed var(--color-success);
  padding: 18px 24px;
  border-radius: var(--radius-md);
  margin-top: 48px;
  text-align: center;
  font-size: 16px;
  font-weight: 700;
  color: var(--color-success);
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.05);
  transition: transform var(--transition-fast);
}
.reviews-bottom-note:hover {
  transform: scale(1.01);
}
.reviews-bottom-note svg {
  color: var(--color-success);
  flex-shrink: 0;
}

/* Responsive Adjustments */
@media (max-width: 1024px) {
  .hero-grid, .calc-container, .contact-grid, .clean-tech-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }
  .hero-visual, .clean-tech-visual {
    order: -1;
    max-width: 500px;
    margin: 0 auto;
  }
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 40px;
  }
  .section-title {
    font-size: 32px;
  }
  .nav-links {
    display: none;
  }
  .quiz-options {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .google-reviews-container {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  /* Problems Mobile Slider */
  .problems-slider-container {
    position: relative;
    overflow: hidden;
    width: 100%;
    padding: 10px 0;
  }
  .problems-grid {
    display: flex;
    flex-direction: row;
    width: 100%;
    gap: 0;
    transition: transform 0.8s cubic-bezier(0.25, 1, 0.5, 1); /* Slow premium transition */
    transform: translateX(0);
  }
  .problem-card {
    flex: 0 0 100%;
    width: 100%;
    margin: 0;
    box-sizing: border-box;
    transform: none !important;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
  }
  .problems-slider-controls {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 24px;
    padding: 0 10px;
  }
  .slider-arrow {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
  }
  .slider-arrow:hover {
    background: var(--bg-glass-active);
    color: var(--color-primary);
  }
  .slider-dots {
    display: flex;
    gap: 8px;
  }
  .dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--border-color);
    cursor: pointer;
    transition: all var(--transition-fast);
  }
  .dot.active {
    background: var(--color-primary);
    width: 20px;
    border-radius: 4px;
  }
}

@media (max-width: 480px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .hero-stats {
    flex-direction: column;
    gap: 20px;
  }
}

/* Green Pulse Animation */
@keyframes pulse-green {
  0% {
    transform: scale(0.9);
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
  }
  70% {
    transform: scale(1.1);
    box-shadow: 0 0 0 8px rgba(16, 185, 129, 0);
  }
  100% {
    transform: scale(0.9);
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0);
  }
}