/* ===================================
   ELECUBEX REFINED DESIGN SYSTEM
   Professional Layout & Spacing
   =================================== */

:root {
  /* Color Palette */
  --primary: #3E362E;
  --secondary: #865D36;
  --accent: #93785B;
  --light: #AC8968;
  --lighter: #A69080;
  --white: #ffffff;
  --black: #000000;
  
  /* Glass Effects */
  --glass: rgba(62, 54, 46, 0.7);
  --glass-light: rgba(172, 137, 104, 0.1);
  --glass-border: rgba(172, 137, 104, 0.2);
  
  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.4);
  
  /* Spacing System */
  --space-xs: 8px;
  --space-sm: 16px;
  --space-md: 24px;
  --space-lg: 32px;
  --space-xl: 48px;
  --space-2xl: 64px;
  --space-3xl: 80px;
  --space-4xl: 100px;
  
  /* Layout */
  --container-max: 1280px;
  --container-padding: 5%;
  --radius: 16px;
  --radius-sm: 8px;
  --radius-lg: 24px;
  
  /* Transitions */
  --transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: all 0.2s ease;
}

/* ===================================
   RESET & BASE
   =================================== */

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

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: linear-gradient(135deg, var(--primary) 0%, #2a2420 100%);
  color: var(--lighter);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
}

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

a {
  text-decoration: none;
  color: inherit;
}

ul {
  list-style: none;
}

/* ===================================
   LOADING SCREEN
   =================================== */

#loader {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, var(--primary) 0%, #1a1612 100%);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  z-index: 10000;
  transition: opacity 0.6s ease, visibility 0.6s ease;
}

#loader.hidden {
  opacity: 0;
  visibility: hidden;
}

.loader-icon {
  width: 60px;
  height: 60px;
  border: 4px solid var(--glass-light);
  border-top: 4px solid var(--light);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-bottom: var(--space-md);
}

.loader-text {
  font-size: 16px;
  color: var(--lighter);
  letter-spacing: 2px;
  animation: pulse 1.5s ease-in-out infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

@keyframes pulse {
  0%, 100% { opacity: 0.6; }
  50% { opacity: 1; }
}

/* ===================================
   SCROLL PROGRESS BAR
   =================================== */

#scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  background: linear-gradient(90deg, var(--secondary), var(--light));
  z-index: 9999;
  transition: width 0.1s ease;
}

/* ===================================
   NAVIGATION
   =================================== */

nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  padding: var(--space-md) var(--container-padding);
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 1000;
  transition: var(--transition);
}

nav.scrolled {
  background: var(--glass);
  backdrop-filter: blur(20px);
  padding: var(--space-sm) var(--container-padding);
  box-shadow: var(--shadow);
  border-bottom: 1px solid var(--glass-border);
}

.logo {
  display: flex;
  align-items: center;
  transition: var(--transition);
}

.logo-img {
  height: 40px;
  width: auto;
  transition: var(--transition);
}

nav.scrolled .logo-img {
  height: 36px;
}

.logo:hover .logo-img {
  transform: scale(1.05);
}

.nav-links {
  display: flex;
  gap: var(--space-lg);
  align-items: center;
}

.nav-links a {
  color: var(--lighter);
  font-size: 15px;
  font-weight: 500;
  transition: var(--transition);
  position: relative;
  padding: var(--space-xs) 0;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--light);
  transition: width 0.3s ease;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--light);
}

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

/* Get Started Button in Nav */
.nav-links .btn {
  padding: 10px 24px;
  margin-left: var(--space-md);
  background: linear-gradient(135deg, var(--secondary), var(--accent));
  color: var(--white);
  border: none;
  border-radius: 50px;
  font-weight: 600;
  font-size: 14px;
  box-shadow: 0 4px 15px rgba(134, 93, 54, 0.3);
  position: relative;
  overflow: hidden;
}

.nav-links .btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
  transition: left 0.5s ease;
}

.nav-links .btn:hover::before {
  left: 100%;
}

.nav-links .btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(134, 93, 54, 0.4);
  color: var(--white);
}

.nav-links .btn::after {
  display: none;
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 6px;
  cursor: pointer;
  z-index: 1001;
}

.hamburger span {
  width: 28px;
  height: 3px;
  background: var(--light);
  border-radius: 2px;
  transition: var(--transition);
}

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(8px, 8px);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(8px, -8px);
}

/* ===================================
   BREADCRUMB
   =================================== */

.breadcrumb {
  padding: 100px var(--container-padding) var(--space-md);
  display: flex;
  gap: var(--space-sm);
  align-items: center;
  font-size: 14px;
  color: var(--lighter);
  max-width: var(--container-max);
  margin: 0 auto;
}

.breadcrumb a {
  color: var(--lighter);
  transition: var(--transition-fast);
}

.breadcrumb a:hover {
  color: var(--light);
}

.breadcrumb span {
  color: var(--accent);
}

/* ===================================
   LAYOUT CONTAINERS
   =================================== */

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.section {
  padding: var(--space-4xl) 0;
  position: relative;
}

.section-sm {
  padding: var(--space-3xl) 0;
}

.section-lg {
  padding: 120px 0;
}

/* Section Separators */
.section-divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--glass-border), transparent);
  margin: var(--space-2xl) auto;
  max-width: 80%;
}

.section-divider-solid {
  border-top: 1px solid var(--glass-border);
  margin: var(--space-4xl) 0;
}

/* Alternating Section Backgrounds */
.section-alt {
  background: linear-gradient(135deg, rgba(62, 54, 46, 0.3), rgba(42, 36, 32, 0.3));
  border-top: 1px solid var(--glass-border);
  border-bottom: 1px solid var(--glass-border);
}

/* ===================================
   TYPOGRAPHY
   =================================== */

h1, h2, h3, h4, h5, h6 {
  color: var(--white);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: var(--space-md);
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  margin-bottom: var(--space-lg);
}

h2 {
  font-size: clamp(2rem, 4vw, 3rem);
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2rem);
}

h4 {
  font-size: clamp(1.25rem, 2.5vw, 1.5rem);
}

p {
  margin-bottom: var(--space-md);
  line-height: 1.7;
  color: var(--lighter);
}

.text-center {
  text-align: center;
}

/* ===================================
   SECTION HEADERS
   =================================== */

.section-header {
  text-align: center;
  margin-bottom: var(--space-2xl);
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.badge {
  display: inline-block;
  padding: var(--space-xs) var(--space-md);
  background: rgba(172, 137, 104, 0.15);
  border: 1px solid var(--glass-border);
  border-radius: 50px;
  color: var(--light);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-bottom: var(--space-md);
}

.section-header h2 {
  margin-bottom: var(--space-md);
}

.section-header p {
  font-size: 18px;
  color: var(--lighter);
  line-height: 1.7;
  margin-bottom: 0;
}

/* ===================================
   GRID SYSTEMS
   =================================== */

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-2xl);
  align-items: center;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
}

.grid-auto {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
}

/* ===================================
   BUTTONS
   =================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  padding: 14px 32px;
  background: linear-gradient(135deg, var(--secondary), var(--accent));
  color: var(--white);
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 15px;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left 0.5s ease;
}

.btn:hover::before {
  left: 100%;
}

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

.btn-outline {
  background: transparent;
  border: 2px solid var(--light);
  color: var(--light);
  box-shadow: none;
}

.btn-outline:hover {
  background: var(--light);
  color: var(--primary);
}

/* ===================================
   GLASS CARDS
   =================================== */

.glass-card {
  background: var(--glass);
  backdrop-filter: blur(20px);
  border-radius: var(--radius);
  padding: var(--space-lg);
  box-shadow: var(--shadow);
  border: 1px solid var(--glass-border);
  transition: var(--transition);
  height: 100%;
  display: flex;
  flex-direction: column;
}

.glass-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: var(--light);
}

/* ===================================
   SCROLL REVEAL ANIMATIONS
   =================================== */

.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

.reveal-left {
  opacity: 0;
  transform: translateX(-40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal-left.active {
  opacity: 1;
  transform: translateX(0);
}

.reveal-right {
  opacity: 0;
  transform: translateX(40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal-right.active {
  opacity: 1;
  transform: translateX(0);
}

.reveal-zoom {
  opacity: 0;
  transform: scale(0.95);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal-zoom.active {
  opacity: 1;
  transform: scale(1);
}

/* ===================================
   FLOATING BUTTONS
   =================================== */

#back-to-top {
  position: fixed;
  bottom: var(--space-lg);
  right: var(--space-lg);
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--secondary), var(--accent));
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  box-shadow: var(--shadow);
  z-index: 999;
}

#back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

#back-to-top:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

#back-to-top svg {
  color: var(--white);
}

.whatsapp-float {
  position: fixed;
  bottom: 90px;
  right: var(--space-lg);
  width: 56px;
  height: 56px;
  background: #25D366;
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: var(--transition);
  z-index: 999;
  animation: float 3s ease-in-out infinite;
}

.whatsapp-float:hover {
  transform: scale(1.1);
  box-shadow: var(--shadow-lg);
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* ===================================
   AI CHATBOT
   =================================== */

#chatbot-toggle {
  position: fixed;
  bottom: 160px;
  right: var(--space-lg);
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--secondary), var(--accent));
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: var(--transition);
  z-index: 999;
}

#chatbot-toggle:hover {
  transform: scale(1.1);
  box-shadow: var(--shadow-lg);
}

#chatbot-toggle svg {
  color: var(--white);
}

#chatbot-window {
  position: fixed;
  bottom: 230px;
  right: var(--space-lg);
  width: 360px;
  height: 500px;
  background: var(--glass);
  backdrop-filter: blur(20px);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--glass-border);
  display: none;
  flex-direction: column;
  z-index: 998;
  overflow: hidden;
}

#chatbot-window.active {
  display: flex;
  animation: slideUp 0.4s ease;
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.chatbot-header {
  padding: var(--space-md);
  background: linear-gradient(135deg, var(--secondary), var(--accent));
  color: var(--white);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.chatbot-header h3 {
  font-size: 16px;
  font-weight: 600;
  margin: 0;
}

.chatbot-close {
  cursor: pointer;
  font-size: 24px;
  line-height: 1;
  transition: var(--transition);
}

.chatbot-close:hover {
  transform: rotate(90deg);
}

.chatbot-messages {
  flex: 1;
  padding: var(--space-md);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.chatbot-messages::-webkit-scrollbar {
  width: 6px;
}

.chatbot-messages::-webkit-scrollbar-track {
  background: rgba(0, 0, 0, 0.2);
}

.chatbot-messages::-webkit-scrollbar-thumb {
  background: var(--accent);
  border-radius: 3px;
}

.chat-message {
  padding: 12px 16px;
  border-radius: 12px;
  max-width: 80%;
  animation: fadeIn 0.3s ease;
  font-size: 14px;
  line-height: 1.5;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.chat-message.bot {
  background: rgba(172, 137, 104, 0.2);
  align-self: flex-start;
  color: var(--white);
}

.chat-message.user {
  background: linear-gradient(135deg, var(--secondary), var(--accent));
  color: var(--white);
  align-self: flex-end;
}

.chatbot-input-area {
  padding: var(--space-md);
  background: rgba(0, 0, 0, 0.3);
  display: flex;
  gap: var(--space-xs);
}

#chatbot-input {
  flex: 1;
  padding: 12px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  color: var(--white);
  font-size: 14px;
  outline: none;
  transition: var(--transition);
}

#chatbot-input:focus {
  border-color: var(--light);
  background: rgba(255, 255, 255, 0.15);
}

#chatbot-send {
  padding: 12px 20px;
  background: linear-gradient(135deg, var(--secondary), var(--accent));
  border: none;
  border-radius: var(--radius-sm);
  color: var(--white);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

#chatbot-send:hover {
  transform: scale(1.05);
}

/* ===================================
   SMART HOME DEMO SECTION
   =================================== */

.demo-container {
  padding: var(--space-4xl) 0;
  background: linear-gradient(135deg, rgba(62, 54, 46, 0.5), rgba(42, 36, 32, 0.5));
  border-top: 1px solid var(--glass-border);
  border-bottom: 1px solid var(--glass-border);
}

.demo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-lg);
  margin-top: var(--space-2xl);
}

.device-card {
  background: var(--glass);
  backdrop-filter: blur(20px);
  border-radius: var(--radius);
  padding: var(--space-lg);
  text-align: center;
  border: 2px solid var(--glass-border);
  transition: var(--transition);
  cursor: pointer;
}

.device-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.device-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--space-md);
  display: flex;
  justify-content: center;
  align-items: center;
  border-radius: 50%;
  background: rgba(172, 137, 104, 0.1);
  transition: var(--transition);
}

.device-card.active .device-icon {
  background: linear-gradient(135deg, var(--secondary), var(--accent));
  box-shadow: 0 0 20px rgba(172, 137, 104, 0.5);
}

.device-icon svg {
  color: var(--lighter);
  transition: var(--transition);
}

.device-card.active .device-icon svg {
  color: var(--white);
}

.device-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--white);
  margin-bottom: var(--space-xs);
}

.device-status {
  font-size: 14px;
  color: var(--accent);
  transition: var(--transition);
}

.device-card.active .device-status {
  color: var(--light);
}

/* ===================================
   FOOTER
   =================================== */

footer {
  background: var(--primary);
  padding: var(--space-3xl) 0 var(--space-md);
  border-top: 1px solid var(--glass-border);
  margin-top: var(--space-4xl);
}

.footer-content {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-2xl);
  margin-bottom: var(--space-2xl);
}

.footer-section h3 {
  color: var(--light);
  font-size: 18px;
  margin-bottom: var(--space-md);
}

.footer-section p,
.footer-section a {
  color: var(--lighter);
  display: block;
  margin-bottom: var(--space-sm);
  transition: var(--transition-fast);
  font-size: 15px;
}

.footer-section a:hover {
  color: var(--light);
  padding-left: var(--space-xs);
}

.footer-bottom {
  text-align: center;
  padding-top: var(--space-md);
  border-top: 1px solid var(--glass-border);
  color: var(--accent);
  font-size: 14px;
  max-width: var(--container-max);
  margin: 0 auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

/* ===================================
   RESPONSIVE DESIGN
   =================================== */

@media (max-width: 1024px) {
  :root {
    --container-padding: 4%;
  }
  
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  :root {
    --space-4xl: 60px;
    --space-3xl: 50px;
    --space-2xl: 40px;
  }
  
  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 70%;
    height: 100vh;
    background: var(--glass);
    backdrop-filter: blur(20px);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: var(--space-lg);
    transition: right 0.4s ease;
    border-left: 1px solid var(--glass-border);
  }

  .nav-links.active {
    right: 0;
  }

  .hamburger {
    display: flex;
  }

  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .section {
    padding: var(--space-3xl) 0;
  }

  #chatbot-window {
    width: calc(100% - 32px);
    right: 16px;
    bottom: 230px;
  }

  .whatsapp-float,
  #back-to-top,
  #chatbot-toggle {
    right: 16px;
  }
}

@media (max-width: 480px) {
  .logo {
    font-size: 20px;
  }

  .btn {
    padding: 12px 24px;
    font-size: 14px;
  }

  .glass-card {
    padding: var(--space-md);
  }

  .section-header {
    margin-bottom: var(--space-xl);
  }
}