/* ================================
   DAKEE - Design System & Foundation
   Premium B2B SaaS Platform
   Theme: Digital Earth
   ================================ */

/* === CSS CUSTOM PROPERTIES === */
:root {
  /* Color Palette - Digital Earth */
  --color-space-blue: hsl(220, 40%, 12%);
  --color-charcoal: hsl(0, 0%, 15%);
  --color-deep-black: hsl(0, 0%, 8%);
  --color-electric-cyan: hsl(185, 100%, 50%);
  --color-bio-green: hsl(145, 85%, 55%);
  --color-warm-gold: hsl(42, 95%, 60%);

  /* Accent Variations */
  --color-cyan-dim: hsl(185, 100%, 35%);
  --color-cyan-glow: hsl(185, 100%, 65%);
  --color-green-dim: hsl(145, 85%, 40%);
  --color-green-glow: hsl(145, 85%, 70%);

  /* Functional Colors */
  --color-bg-primary: var(--color-deep-black);
  --color-bg-secondary: var(--color-space-blue);
  --color-bg-card: hsla(220, 40%, 12%, 0.6);
  --color-text-primary: hsl(0, 0%, 95%);
  --color-text-secondary: hsl(0, 0%, 75%);
  --color-text-dim: hsl(0, 0%, 60%);

  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-display: 'Outfit', 'Inter', sans-serif;

  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;
  --font-size-6xl: 3.75rem;
  --font-size-7xl: 4.5rem;

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 0.75rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
  --space-5xl: 8rem;

  /* Effects */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
  --glow-cyan: 0 0 20px rgba(0, 255, 255, 0.5);
  --glow-green: 0 0 20px rgba(34, 221, 136, 0.5);
  --glow-gold: 0 0 20px rgba(255, 200, 70, 0.5);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;

  /* Layout */
  --max-width-sm: 640px;
  --max-width-md: 768px;
  --max-width-lg: 1024px;
  --max-width-xl: 1280px;
  --max-width-2xl: 1536px;

  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-full: 9999px;
}

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

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

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

/* === TYPOGRAPHY === */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--space-lg);
}

h1 {
  font-size: var(--font-size-7xl);
}

h2 {
  font-size: var(--font-size-5xl);
}

h3 {
  font-size: var(--font-size-4xl);
}

h4 {
  font-size: var(--font-size-3xl);
}

h5 {
  font-size: var(--font-size-2xl);
}

h6 {
  font-size: var(--font-size-xl);
}

p {
  margin-bottom: var(--space-md);
  color: var(--color-text-secondary);
}

a {
  color: var(--color-electric-cyan);
  text-decoration: none;
  transition: color var(--transition-base);
}

a:hover {
  color: var(--color-cyan-glow);
}

/* === LAYOUT UTILITIES === */
.container {
  width: 100%;
  max-width: var(--max-width-xl);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.container-wide {
  max-width: var(--max-width-2xl);
}

.section {
  padding: var(--space-5xl) 0;
  position: relative;
}

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

/* === GRID SYSTEM === */
.grid {
  display: grid;
  gap: var(--space-xl);
}

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

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

/* === FLEX UTILITIES === */
.flex {
  display: flex;
}

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

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

.flex-col {
  flex-direction: column;
}

.gap-sm {
  gap: var(--space-sm);
}

.gap-md {
  gap: var(--space-md);
}

.gap-lg {
  gap: var(--space-lg);
}

.gap-xl {
  gap: var(--space-xl);
}

/* === BUTTONS === */
.btn {
  display: inline-block;
  padding: var(--space-md) var(--space-2xl);
  font-family: var(--font-display);
  font-size: var(--font-size-base);
  font-weight: 600;
  text-align: center;
  border-radius: var(--radius-full);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-electric-cyan), var(--color-bio-green));
  color: var(--color-deep-black);
  box-shadow: var(--glow-cyan);
}

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

.btn-secondary {
  background: transparent;
  border-color: var(--color-electric-cyan);
  color: var(--color-electric-cyan);
}

.btn-secondary:hover {
  background: var(--color-electric-cyan);
  color: var(--color-deep-black);
  box-shadow: var(--glow-cyan);
  transform: translateY(-2px);
}

.btn-lg {
  padding: var(--space-lg) var(--space-3xl);
  font-size: var(--font-size-lg);
}

/* === CARDS === */
.card {
  background: var(--color-bg-card);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  transition: all var(--transition-base);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(0, 255, 255, 0.3);
}

.card-icon {
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, var(--color-electric-cyan), var(--color-bio-green));
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-lg);
  font-size: var(--font-size-3xl);
  color: var(--color-deep-black);
}

.card h3 {
  color: var(--color-text-primary);
  margin-bottom: var(--space-md);
}

.card p {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
}

/* === NAVIGATION === */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(10, 10, 15, 0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding: var(--space-lg) 0;
  transition: all var(--transition-base);
}

.navbar.scrolled {
  box-shadow: var(--shadow-lg);
}

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

.navbar-logo {
  font-family: var(--font-display);
  font-size: var(--font-size-2xl);
  font-weight: 700;
  background: linear-gradient(135deg, var(--color-electric-cyan), var(--color-bio-green));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.navbar-menu {
  display: flex;
  gap: var(--space-2xl);
  list-style: none;
}

.navbar-menu a {
  color: var(--color-text-primary);
  font-weight: 500;
  position: relative;
  transition: color var(--transition-base);
}

.navbar-menu a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-electric-cyan), var(--color-bio-green));
  transition: width var(--transition-base);
}

.navbar-menu a:hover {
  color: var(--color-electric-cyan);
}

.navbar-menu a:hover::after {
  width: 100%;
}

.navbar-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--color-text-primary);
  font-size: var(--font-size-2xl);
  cursor: pointer;
}

/* === HERO SECTION === */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding-top: 80px;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  background: radial-gradient(ellipse at center, var(--color-space-blue) 0%, var(--color-deep-black) 70%);
}

.hero-animation {
  position: absolute;
  width: 100%;
  height: 100%;
  opacity: 0.4;
}

.hero-content {
  position: relative;
  z-index: 10;
  text-align: center;
  max-width: 900px;
  padding: var(--space-2xl);
}

.hero h1 {
  font-size: clamp(2.5rem, 8vw, 5rem);
  margin-bottom: var(--space-xl);
  background: linear-gradient(135deg, var(--color-text-primary), var(--color-electric-cyan), var(--color-bio-green));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: fadeInUp 1s ease;
}

.hero p {
  font-size: var(--font-size-xl);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2xl);
  animation: fadeInUp 1s ease 0.2s backwards;
}

.hero-cta {
  display: flex;
  gap: var(--space-lg);
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeInUp 1s ease 0.4s backwards;
}

/* === VALUE PROPOSITION STRIP === */
.value-strip {
  background: linear-gradient(135deg, rgba(0, 255, 255, 0.1), rgba(34, 221, 136, 0.1));
  padding: var(--space-3xl) 0;
  border-top: 1px solid rgba(0, 255, 255, 0.2);
  border-bottom: 1px solid rgba(0, 255, 255, 0.2);
}

.value-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-2xl);
}

.value-item {
  text-align: center;
  padding: var(--space-lg);
}

.value-icon {
  font-size: var(--font-size-5xl);
  margin-bottom: var(--space-md);
  color: var(--color-electric-cyan);
}

.value-item h3 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-sm);
}

/* === SPLIT SECTION === */
.split-section {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4xl);
  align-items: center;
}

.split-content h2 {
  margin-bottom: var(--space-lg);
}

.split-visual {
  position: relative;
  min-height: 400px;
  border-radius: var(--radius-xl);
  overflow: hidden;
}

.split-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* === INDUSTRIES GRID === */
.industry-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-xl);
}

.industry-card {
  position: relative;
  aspect-ratio: 1;
  border-radius: var(--radius-xl);
  overflow: hidden;
  cursor: pointer;
  transition: transform var(--transition-base);
}

.industry-card:hover {
  transform: scale(1.05);
}

.industry-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0, 255, 255, 0.2), rgba(34, 221, 136, 0.2));
  opacity: 0;
  transition: opacity var(--transition-base);
}

.industry-card:hover::before {
  opacity: 1;
}

.industry-content {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--space-xl);
  background: linear-gradient(to top, rgba(0, 0, 0, 0.9), transparent);
}

.industry-content h3 {
  font-size: var(--font-size-2xl);
  margin-bottom: 0;
}

/* === FOOTER === */
.footer {
  background: var(--color-space-blue);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: var(--space-4xl) 0 var(--space-2xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-3xl);
  margin-bottom: var(--space-3xl);
}

.footer-brand h3 {
  font-size: var(--font-size-3xl);
  background: linear-gradient(135deg, var(--color-electric-cyan), var(--color-bio-green));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

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

.footer-links a {
  color: var(--color-text-secondary);
  transition: color var(--transition-base);
}

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

.newsletter-form {
  display: flex;
  gap: var(--space-sm);
  margin-top: var(--space-md);
}

.newsletter-input {
  flex: 1;
  padding: var(--space-md);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  font-family: var(--font-primary);
}

.newsletter-input:focus {
  outline: none;
  border-color: var(--color-electric-cyan);
  box-shadow: var(--glow-cyan);
}

.footer-bottom {
  text-align: center;
  padding-top: var(--space-2xl);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--color-text-dim);
  font-size: var(--font-size-sm);
}

/* === FORM ELEMENTS === */
.form-group {
  margin-bottom: var(--space-lg);
}

.form-label {
  display: block;
  margin-bottom: var(--space-sm);
  color: var(--color-text-primary);
  font-weight: 500;
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: var(--space-md);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  transition: all var(--transition-base);
}

.form-select option {
  background: var(--color-charcoal);
  color: var(--color-text-primary);
  padding: var(--space-sm);
}

.form-select optgroup {
  background: var(--color-space-blue);
  color: var(--color-text-primary);
  font-weight: 600;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--color-electric-cyan);
  box-shadow: var(--glow-cyan);
}

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

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

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

@keyframes float {

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

  50% {
    transform: translateY(-20px);
  }
}

@keyframes pulse-glow {

  0%,
  100% {
    box-shadow: var(--glow-cyan);
  }

  50% {
    box-shadow: 0 0 40px rgba(0, 255, 255, 0.8);
  }
}

@keyframes scan {
  0% {
    transform: translateY(-100%);
  }

  100% {
    transform: translateY(100%);
  }
}

.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s ease;
}

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

/* === RESPONSIVE DESIGN === */
@media (max-width: 1024px) {
  :root {
    --font-size-7xl: 3.5rem;
    --font-size-5xl: 2.5rem;
  }

  .grid-3,
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .split-section {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 768px) {
  :root {
    --font-size-7xl: 2.5rem;
    --font-size-5xl: 2rem;
    --space-4xl: 4rem;
    --space-5xl: 5rem;
  }

  .navbar-menu {
    position: fixed;
    top: 73px;
    left: 0;
    right: 0;
    background: rgba(10, 10, 15, 0.98);
    flex-direction: column;
    padding: var(--space-xl);
    gap: var(--space-lg);
    transform: translateX(-100%);
    transition: transform var(--transition-base);
  }

  .navbar-menu.active {
    transform: translateX(0);
  }

  .navbar-toggle {
    display: block;
  }

  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  .hero-cta {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }

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

  .newsletter-form {
    flex-direction: column;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--space-md);
  }

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