/* ===================================
   GreenSol - Premium Design System
   Engineering Intelligence. Powering the Future.
   =================================== */

/* === Google Fonts === */
@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:wght@500;600;700;800&family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

/* === Premium Resets & Selection === */
::selection {
  background: var(--color-primary);
  color: var(--color-white);
}

::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: var(--color-light);
}

::-webkit-scrollbar-thumb {
  background: var(--color-primary-light);
  border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-primary);
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* === CSS Variables === */
:root {
  /* Colors */
  --color-primary: #006B7D;
  --color-primary-light: #008CA0;
  --color-primary-dark: #004D5C;
  --color-secondary: #00D084;
  --color-secondary-light: #00F59B;
  --color-accent: #0EA5E9;
  --color-accent-dark: #0284C7;
  --color-dark: #0F172A;
  --color-dark-light: #1E293B;
  --color-light: #F8FAFC;
  --color-light-dark: #E2E8F0;
  --color-white: #FFFFFF;
  --color-gray: #64748B;
  --color-gray-light: #CBD5E1;

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
  --gradient-secondary: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-accent) 100%);
  --gradient-dark: linear-gradient(135deg, var(--color-dark) 0%, var(--color-dark-light) 100%);
  --gradient-hero: linear-gradient(135deg, rgba(0, 107, 125, 0.85) 0%, rgba(14, 165, 233, 0.85) 100%);

  /* Typography */
  --font-heading: 'Playfair Display', serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  --spacing-3xl: 6rem;

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  --shadow-glow: 0 0 30px rgba(0, 213, 132, 0.3);
  --shadow-text: 0 2px 4px rgba(0, 0, 0, 0.3);
  /* New text shadow for readability */

  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 300ms ease-in-out;
  --transition-slow: 500ms ease-in-out;

  /* Z-index */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal: 1040;
  --z-popover: 1050;
  --z-tooltip: 1060;
}

/* === Reset & Base === */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  scroll-padding-top: 100px;
  /* Offset for fixed header */
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.7;
  color: var(--color-dark);
  background-color: var(--color-light);
  overflow-x: hidden;
}

/* === Typography === */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-dark);
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
}

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);
}

h5 {
  font-size: 1.125rem;
}

h6 {
  font-size: 1rem;
}

p {
  margin-bottom: var(--spacing-md);
  color: var(--color-gray);
}

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

a:hover {
  color: var(--color-accent-dark);
}

/* === Container === */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.container-fluid {
  width: 100%;
  padding: 0 var(--spacing-md);
}

/* === Header & Navigation === */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: var(--z-sticky);
  transition: all var(--transition-base);
  padding: var(--spacing-md) 0;
}

.header.scrolled {
  background: rgba(15, 23, 42, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-lg);
  padding: var(--spacing-sm) 0;
}

.header.transparent {
  background: transparent;
}

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

.logo {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-white);
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.logo-tagline {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 400;
  color: var(--color-secondary);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: var(--spacing-lg);
  align-items: center;
}

.nav-link {
  color: var(--color-white);
  font-weight: 500;
  position: relative;
  padding: 0.5rem 0;
  transition: color var(--transition-fast);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-secondary);
  transition: width var(--transition-base);
}

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

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

.nav-link.active::after {
  width: 100%;
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 0.375rem;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.menu-toggle span {
  width: 1.5rem;
  height: 2px;
  background: var(--color-white);
  transition: all var(--transition-base);
}

/* === Hero Section === */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-dark);
  /* Fallback */
  background-size: cover;
  background-position: center;
  overflow: hidden;
  padding: var(--spacing-3xl) 0;
}

.hero-video {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-hero);
  z-index: 1;
  /* Overlay sits on top of video */
}

@keyframes pulse {

  0%,
  100% {
    opacity: 1;
  }

  50% {
    opacity: 0.8;
  }
}

.hero-content {
  position: relative;
  z-index: 2;
  /* Content sits on top of overlay */
  text-align: center;
  color: var(--color-white);
  max-width: 900px;
  margin: 0 auto;
}

.hero-title {
  color: var(--color-white);
  margin-bottom: var(--spacing-md);
  animation: fadeInUp 1s ease-out;
  text-shadow: var(--shadow-text);
}

.hero-tagline {
  font-size: clamp(1.25rem, 2vw, 1.75rem);
  color: var(--color-secondary);
  font-weight: 300;
  margin-bottom: var(--spacing-xl);
  animation: fadeInUp 1s ease-out 0.2s both;
  text-shadow: var(--shadow-text);
}

.hero-description {
  font-size: clamp(1rem, 1.5vw, 1.25rem);
  color: rgba(255, 255, 255, 0.95);
  margin-bottom: var(--spacing-xl);
  animation: fadeInUp 1s ease-out 0.4s both;
  text-shadow: var(--shadow-text);
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* === Buttons === */
.btn-group {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeInUp 1s ease-out 0.6s both;
}

.btn {
  display: inline-block;
  padding: 1rem 2rem;
  font-weight: 600;
  font-size: 1rem;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
  width: 300px;
  height: 300px;
}

.btn-primary {
  background: var(--gradient-secondary);
  color: var(--color-dark);
  box-shadow: var(--shadow-lg);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-xl), var(--shadow-glow);
}

.btn-outline {
  background: transparent;
  color: var(--color-white);
  border: 2px solid var(--color-white);
}

.btn-outline:hover {
  background: var(--color-white);
  color: var(--color-dark);
  transform: translateY(-3px);
}

.btn-outline-dark {
  background: transparent;
  color: var(--color-dark);
  border: 2px solid var(--color-dark);
}

.btn-outline-dark:hover {
  background: var(--color-dark);
  color: var(--color-white);
  transform: translateY(-3px);
}

/* === Section === */
.section {
  padding: var(--spacing-3xl) 0;
}

.section-dark {
  background: var(--gradient-dark);
  color: var(--color-white);
}

.section-dark h2,
.section-dark h3,
.section-dark h4 {
  color: var(--color-white);
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto var(--spacing-2xl);
}

.section-subtitle {
  color: var(--color-secondary);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 0.875rem;
  margin-bottom: var(--spacing-sm);
}

/* === Cards === */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

.card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--gradient-secondary);
  transform: scaleX(0);
  transition: transform var(--transition-base);
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

.card:hover::before {
  transform: scaleX(1);
}

/* Glassmorphic Card */
.card-glass {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--color-white);
}

.card-glass h3,
.card-glass h4 {
  color: var(--color-white);
}

.card-icon {
  width: 60px;
  height: 60px;
  background: var(--gradient-secondary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  margin-bottom: var(--spacing-md);
}

.card-title {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-sm);
}

.card-text {
  color: var(--color-gray);
  margin-bottom: var(--spacing-md);
}

.card-glass .card-text {
  color: rgba(255, 255, 255, 0.8);
}

/* === Stats Section === */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

.stat-card {
  text-align: center;
  padding: var(--spacing-xl);
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: all var(--transition-base);
}

.stat-card:hover {
  transform: translateY(-5px);
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--color-secondary);
}

.stat-number {
  font-family: var(--font-heading);
  font-size: clamp(2.5rem, 4vw, 3.5rem);
  font-weight: 800;
  color: var(--color-secondary);
  margin-bottom: var(--spacing-sm);
  line-height: 1;
}

.stat-label {
  font-size: 1.125rem;
  color: rgba(255, 255, 255, 0.9);
  font-weight: 500;
}

/* === Premium Stats Grid === */
.premium-stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-xl);
  margin-top: var(--spacing-xl);
}

.premium-stat-card {
  position: relative;
  padding: var(--spacing-xl);
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0.02) 100%);
  backdrop-filter: blur(20px);
  border-radius: var(--radius-xl);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: all var(--transition-base);
  overflow: hidden;
}

.premium-stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-secondary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

.premium-stat-card:hover {
  transform: translateY(-8px);
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0.05) 100%);
  border-color: rgba(0, 213, 132, 0.3);
  box-shadow: 0 20px 40px rgba(0, 213, 132, 0.1);
}

.premium-stat-card:hover::before {
  transform: scaleX(1);
}

.stat-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
  display: inline-block;
  filter: drop-shadow(0 4px 6px rgba(0, 213, 132, 0.3));
  animation: float 3s ease-in-out infinite;
}

@keyframes float {

  0%,
  100% {
    transform: translateY(0px);
  }

  50% {
    transform: translateY(-10px);
  }
}

.stat-content {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.premium-stat-card .stat-number {
  font-size: clamp(2.5rem, 4vw, 3.5rem);
  background: var(--gradient-secondary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--spacing-xs);
}

.premium-stat-card .stat-label {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: var(--spacing-xs);
}

.stat-description {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.6);
  line-height: 1.5;
}

/* === Bento Grid === */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--spacing-md);
  margin-top: var(--spacing-xl);
}

.bento-item {
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
  min-height: 300px;
  display: flex;
  align-items: flex-end;
  background-size: cover;
  background-position: center;
  transition: all var(--transition-base);
}

.bento-item::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.8), transparent);
  transition: background var(--transition-base);
}

.bento-item:hover::before {
  background: linear-gradient(to top, rgba(0, 107, 125, 0.9), transparent);
}

.bento-item:hover {
  transform: scale(1.02);
}

.bento-large {
  grid-column: span 6;
}

.bento-medium {
  grid-column: span 6;
}

.bento-small {
  grid-column: span 4;
}

.bento-content {
  position: relative;
  z-index: 1;
  padding: var(--spacing-lg);
  color: var(--color-white);
}

.bento-content h3 {
  color: var(--color-white);
  margin-bottom: var(--spacing-sm);
}

/* === Service Pages === */
.service-hero {
  min-height: 60vh;
  background: var(--color-dark);
  /* Fallback */
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: center;
  color: var(--color-white);
  position: relative;
  overflow: hidden;
}

.service-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-hero);
  z-index: 0;
}

.service-content {
  position: relative;
  z-index: 1;
  text-shadow: var(--shadow-text);
}

.feature-list {
  list-style: none;
  margin: var(--spacing-lg) 0;
}

.feature-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
  background: var(--color-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
}

.feature-item:hover {
  box-shadow: var(--shadow-lg);
  transform: translateX(10px);
}

.feature-icon {
  width: 48px;
  height: 48px;
  background: var(--gradient-secondary);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 1.5rem;
}

.feature-content h4 {
  margin-bottom: 0.5rem;
  color: var(--color-dark);
}

.feature-content p {
  margin: 0;
  color: var(--color-gray);
}

/* === Technical Specs === */
.spec-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-md);
  margin: var(--spacing-xl) 0;
}

.spec-card {
  background: var(--color-white);
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  border-left: 4px solid var(--color-secondary);
  box-shadow: var(--shadow-md);
}

.spec-label {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--color-gray);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--spacing-xs);
}

.spec-value {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-dark);
}

/* === Badges === */
.badge-grid {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  margin: var(--spacing-lg) 0;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--color-dark);
  color: var(--color-white);
  border-radius: var(--radius-lg);
  font-weight: 600;
  font-size: 0.875rem;
  box-shadow: var(--shadow-md);
}

.badge-success {
  background: var(--color-secondary);
  color: var(--color-dark);
}

/* === Contact Form === */
.form-group {
  margin-bottom: var(--spacing-md);
}

.form-label {
  display: block;
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
  color: var(--color-dark);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 2px solid var(--color-gray-light);
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: 1rem;
  transition: all var(--transition-fast);
  background: var(--color-white);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.1);
}

.form-textarea {
  resize: vertical;
  min-height: 150px;
}

/* === Footer === */
.footer {
  background: var(--color-dark);
  color: rgba(255, 255, 255, 0.8);
  padding: var(--spacing-3xl) 0 var(--spacing-lg);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.footer-column h4 {
  color: var(--color-white);
  margin-bottom: var(--spacing-md);
  font-size: 1.125rem;
}

.footer-links {
  list-style: none;
}

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

.footer-links a {
  color: rgba(255, 255, 255, 0.7);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-secondary);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--spacing-lg);
  text-align: center;
  font-size: 0.875rem;
}

/* === Responsive Design === */
@media (max-width: 1024px) {

  .bento-large,
  .bento-medium {
    grid-column: span 12;
  }

  .bento-small {
    grid-column: span 6;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 70%;
    height: 100vh;
    background: var(--color-dark);
    flex-direction: column;
    padding: var(--spacing-3xl) var(--spacing-lg);
    transition: right var(--transition-base);
    box-shadow: var(--shadow-xl);
  }

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

  .menu-toggle {
    display: flex;
    z-index: var(--z-modal);
  }

  .menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

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

  .menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
  }

  .btn-group {
    flex-direction: column;
    align-items: stretch;
  }

  .bento-small {
    grid-column: span 12;
  }

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

/* === Utility Classes === */
.text-center {
  text-align: center;
}

.text-gradient {
  background: var(--gradient-secondary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.mt-1 {
  margin-top: var(--spacing-sm);
}

.mt-2 {
  margin-top: var(--spacing-md);
}

.mt-3 {
  margin-top: var(--spacing-lg);
}

.mt-4 {
  margin-top: var(--spacing-xl);
}

.mb-1 {
  margin-bottom: var(--spacing-sm);
}

.mb-2 {
  margin-bottom: var(--spacing-md);
}

.mb-3 {
  margin-bottom: var(--spacing-lg);
}

.mb-4 {
  margin-bottom: var(--spacing-xl);
}

.fade-in {
  animation: fadeInUp 1s ease-out;
}