/* Helium Website - Neural Arc Brand Colors & Modern Interactive Design */

/* ===== CSS RESET ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* Neural Arc / Helium Brand Colors */
  --color-quantum-core: #262626;
  --color-reactor-core: #E0693D;
  --color-mint-node: #D0EF5E;
  --color-neural-drift: #A69CBE;
  --color-dataflow-blue: #A6C8D5;
  --color-ion-spark: #EFB3AF;
  --color-solar-pulse: #E7B31B;
  --color-verdant-code: #27584F;
  --color-comet-grey: #ECECEC;
  
  /* Extended Palette */
  --color-black: #000000;
  --color-white: #FFFFFF;
  --color-dark: var(--color-quantum-core);
  --color-light: var(--color-comet-grey);
  
  /* Semantic Colors */
  --color-primary: var(--color-reactor-core);
  --color-secondary: var(--color-mint-node);
  --color-accent: var(--color-neural-drift);
  --color-highlight: var(--color-solar-pulse);
  --color-info: var(--color-dataflow-blue);
  --color-success: var(--color-verdant-code);
  
  /* Background Gradients */
  --gradient-hero: linear-gradient(135deg, var(--color-quantum-core) 0%, #1a1a1a 100%);
  --gradient-dark: linear-gradient(180deg, var(--color-quantum-core) 0%, #1a1a1a 100%);
  --gradient-accent: linear-gradient(135deg, var(--color-reactor-core) 0%, var(--color-solar-pulse) 100%);
  --gradient-cool: linear-gradient(135deg, var(--color-dataflow-blue) 0%, var(--color-neural-drift) 100%);
  --gradient-fresh: linear-gradient(135deg, var(--color-mint-node) 0%, var(--color-verdant-code) 100%);

  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Courier New', monospace;

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

  /* Typography Scale */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;
  --text-6xl: 3.75rem;
  --text-7xl: 4.5rem;
  --text-8xl: 6rem;

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 500ms cubic-bezier(0.68, -0.55, 0.265, 1.55);

  /* 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-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  --shadow-glow: 0 0 20px rgba(224, 105, 61, 0.3);
  --shadow-glow-mint: 0 0 30px rgba(208, 239, 94, 0.4);

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-2xl: 2rem;
  --radius-full: 9999px;

  /* Container */
  --container-max: 1280px;
  --container-padding: var(--space-lg);
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-primary);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-quantum-core);
  background-color: var(--color-white);
  overflow-x: hidden;
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(var(--text-4xl), 6vw, var(--text-8xl));
  margin-bottom: var(--space-lg);
  font-weight: 800;
}

h2 {
  font-size: clamp(var(--text-3xl), 5vw, var(--text-6xl));
  margin-bottom: var(--space-md);
  font-weight: 700;
}

h3 {
  font-size: clamp(var(--text-2xl), 3vw, var(--text-4xl));
  margin-bottom: var(--space-md);
}

h4 {
  font-size: clamp(var(--text-xl), 2vw, var(--text-2xl));
  margin-bottom: var(--space-sm);
}

p {
  margin-bottom: var(--space-md);
  max-width: 65ch;
}

.text-large {
  font-size: clamp(var(--text-lg), 2vw, var(--text-2xl));
  line-height: 1.5;
}

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

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

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

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

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

.bg-light {
  background-color: var(--color-comet-grey);
}

.bg-gradient {
  background: var(--gradient-hero);
  color: var(--color-white);
}

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

.header.scrolled {
  box-shadow: var(--shadow-lg);
  background: rgba(255, 255, 255, 0.98);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--container-padding);
  max-width: var(--container-max);
  margin: 0 auto;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-quantum-core);
  text-decoration: none;
  transition: transform var(--transition-fast);
}

.logo img {
  height: 36px;
  width: auto;
  transition: transform var(--transition-base);
}

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

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

.nav-link {
  color: var(--color-quantum-core);
  text-decoration: none;
  font-size: var(--text-sm);
  font-weight: 500;
  transition: all var(--transition-fast);
  position: relative;
  padding: var(--space-xs) 0;
}

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

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

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

.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-xs);
  color: var(--color-quantum-core);
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-xl);
  font-size: var(--text-base);
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
  cursor: pointer;
  border: 2px solid transparent;
  white-space: nowrap;
  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, 0.3);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

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

.btn-primary {
  background: var(--gradient-accent);
  color: var(--color-white);
  box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 10px 30px rgba(224, 105, 61, 0.4);
}

.btn-secondary {
  background: var(--color-white);
  color: var(--color-quantum-core);
  border-color: var(--color-quantum-core);
}

.btn-secondary:hover {
  background: var(--color-quantum-core);
  color: var(--color-white);
  transform: translateY(-2px) scale(1.02);
  box-shadow: var(--shadow-xl);
}

.btn-large {
  padding: var(--space-md) var(--space-2xl);
  font-size: var(--text-lg);
}

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

.btn-outline:hover {
  background: var(--color-white);
  color: var(--color-quantum-core);
}

/* ===== HERO SECTION ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 100px;
  background: var(--gradient-hero);
  color: var(--color-white);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(224, 105, 61, 0.15) 0%, transparent 70%);
  border-radius: 50%;
  animation: float 20s ease-in-out infinite;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(208, 239, 94, 0.1) 0%, transparent 70%);
  border-radius: 50%;
  animation: float 15s ease-in-out infinite reverse;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(30px, -30px) scale(1.1); }
}

.hero-content {
  text-align: center;
  max-width: 1000px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.hero h1 {
  margin-bottom: var(--space-md);
  font-size: clamp(var(--text-4xl), 7vw, var(--text-8xl));
  line-height: 1.1;
  animation: fadeInUp 0.8s ease-out;
}

.hero-subtitle {
  font-size: clamp(var(--text-lg), 2.5vw, var(--text-2xl));
  line-height: 1.5;
  color: var(--color-comet-grey);
  margin-bottom: var(--space-2xl);
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
  animation: fadeInUp 0.8s ease-out 0.2s both;
}

.hero-cta {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: var(--space-3xl);
  animation: fadeInUp 0.8s ease-out 0.4s both;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Hero Visual - Animated Workflow */
.hero-visual {
  margin-top: var(--space-3xl);
  animation: fadeInUp 0.8s ease-out 0.6s both;
}

.workflow-diagram {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-lg);
  flex-wrap: wrap;
  padding: var(--space-2xl);
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-2xl);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.workflow-step {
  flex: 1;
  min-width: 200px;
  padding: var(--space-xl);
  background: rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-xl);
  text-align: center;
  transition: all var(--transition-base);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.workflow-step:hover {
  transform: translateY(-8px) scale(1.05);
  background: rgba(255, 255, 255, 0.12);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.workflow-step h4 {
  font-size: var(--text-xl);
  margin-bottom: var(--space-xs);
  color: var(--color-mint-node);
}

.workflow-step p {
  font-size: var(--text-sm);
  color: var(--color-comet-grey);
  margin: 0;
}

.workflow-arrow {
  width: 40px;
  height: 40px;
  color: var(--color-reactor-core);
  flex-shrink: 0;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 0.6; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.1); }
}

/* ===== STATS SECTION ===== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-xl);
  margin-top: var(--space-2xl);
}

.stat-item {
  text-align: center;
  padding: var(--space-xl);
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-xl);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: all var(--transition-base);
}

.stat-item:hover {
  transform: translateY(-5px);
  background: rgba(255, 255, 255, 0.08);
  box-shadow: var(--shadow-xl);
}

.stat-item h3 {
  font-size: var(--text-5xl);
  color: var(--color-mint-node);
  margin-bottom: var(--space-xs);
  font-weight: 800;
}

.stat-item p {
  font-size: var(--text-sm);
  color: var(--color-comet-grey);
  margin: 0;
}

/* ===== PROBLEM SECTION ===== */
.problem-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-lg);
  margin-top: var(--space-2xl);
}

.problem-card {
  padding: var(--space-xl);
  background: var(--color-white);
  border-radius: var(--radius-xl);
  border: 2px solid var(--color-comet-grey);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

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

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

.problem-card:hover {
  transform: translateY(-8px);
  border-color: var(--color-reactor-core);
  box-shadow: var(--shadow-2xl);
}

.problem-icon {
  width: 48px;
  height: 48px;
  color: var(--color-reactor-core);
  margin-bottom: var(--space-md);
}

.problem-card h4 {
  color: var(--color-quantum-core);
  margin-bottom: var(--space-sm);
}

.problem-card p {
  color: var(--color-quantum-core);
  opacity: 0.8;
  font-size: var(--text-sm);
}

/* ===== PILLARS SECTION ===== */
.pillars-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-xl);
  margin-top: var(--space-2xl);
}

.pillar-card {
  padding: var(--space-2xl);
  background: var(--color-white);
  border-radius: var(--radius-2xl);
  border: 2px solid var(--color-comet-grey);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.pillar-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 6px;
  background: var(--gradient-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

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

.pillar-card:hover {
  transform: translateY(-10px) scale(1.02);
  border-color: var(--color-reactor-core);
  box-shadow: var(--shadow-2xl);
}

.pillar-icon {
  width: 64px;
  height: 64px;
  margin-bottom: var(--space-md);
  padding: var(--space-md);
  background: var(--gradient-accent);
  border-radius: var(--radius-xl);
  color: var(--color-white);
  transition: all var(--transition-base);
}

.pillar-card:hover .pillar-icon {
  transform: scale(1.1) rotate(5deg);
  box-shadow: var(--shadow-glow);
}

.pillar-card h3 {
  color: var(--color-quantum-core);
  margin-bottom: var(--space-sm);
}

.pillar-card p {
  color: var(--color-quantum-core);
  opacity: 0.8;
  margin-bottom: var(--space-md);
}

.pillar-benefit {
  display: inline-block;
  padding: var(--space-xs) var(--space-md);
  background: rgba(224, 105, 61, 0.1);
  color: var(--color-reactor-core);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 600;
}

/* ===== USE CASE SELECTOR ===== */
.selector-container {
  margin-top: var(--space-2xl);
}

.selector-tabs {
  display: flex;
  gap: var(--space-sm);
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: var(--space-2xl);
  padding: var(--space-sm);
  background: var(--color-comet-grey);
  border-radius: var(--radius-full);
  width: fit-content;
  margin-left: auto;
  margin-right: auto;
}

.selector-tab {
  padding: var(--space-sm) var(--space-xl);
  background: transparent;
  border: none;
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-quantum-core);
  cursor: pointer;
  transition: all var(--transition-base);
  position: relative;
}

.selector-tab.active {
  background: var(--color-white);
  color: var(--color-reactor-core);
  box-shadow: var(--shadow-md);
}

.selector-tab:hover:not(.active) {
  background: rgba(255, 255, 255, 0.5);
}

.use-cases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--space-xl);
}

.use-case-card {
  padding: var(--space-2xl);
  background: var(--color-white);
  border-radius: var(--radius-2xl);
  border: 2px solid var(--color-comet-grey);
  cursor: pointer;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.use-case-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 100%;
  background: var(--gradient-accent);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.use-case-card:hover::before {
  opacity: 0.05;
}

.use-case-card:hover {
  transform: translateY(-10px) scale(1.02);
  border-color: var(--color-reactor-core);
  box-shadow: var(--shadow-2xl);
}

.use-case-card.hidden {
  display: none;
}

.use-case-icon {
  width: 56px;
  height: 56px;
  padding: var(--space-md);
  background: var(--gradient-cool);
  border-radius: var(--radius-lg);
  color: var(--color-white);
  margin-bottom: var(--space-md);
  transition: all var(--transition-base);
}

.use-case-card:hover .use-case-icon {
  transform: scale(1.1) rotate(-5deg);
}

.use-case-card h4 {
  color: var(--color-quantum-core);
  margin-bottom: var(--space-sm);
}

.use-case-card p {
  color: var(--color-quantum-core);
  opacity: 0.7;
  font-size: var(--text-sm);
  margin-bottom: var(--space-md);
}

.use-case-metrics {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.metric-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-md);
  background: rgba(224, 105, 61, 0.1);
  color: var(--color-reactor-core);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
}

/* ===== COMPARISON SECTION ===== */
.comparison-container {
  padding: var(--space-4xl) 0;
  background: var(--color-comet-grey);
}

.comparison-filters {
  display: flex;
  gap: var(--space-sm);
  justify-content: center;
  flex-wrap: wrap;
  margin: var(--space-2xl) 0;
  padding: var(--space-sm);
  background: var(--color-white);
  border-radius: var(--radius-full);
  width: fit-content;
  margin-left: auto;
  margin-right: auto;
  box-shadow: var(--shadow-md);
}

.filter-btn {
  padding: var(--space-sm) var(--space-lg);
  background: transparent;
  border: none;
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-quantum-core);
  cursor: pointer;
  transition: all var(--transition-base);
}

.filter-btn.active {
  background: var(--gradient-accent);
  color: var(--color-white);
  box-shadow: var(--shadow-glow);
}

.filter-btn:hover:not(.active) {
  background: var(--color-comet-grey);
}

.comparison-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  background: var(--color-white);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
  margin-top: var(--space-xl);
}

.comparison-table thead {
  background: var(--gradient-dark);
  color: var(--color-white);
}

.comparison-table th {
  padding: var(--space-lg);
  text-align: left;
  font-weight: 600;
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.comparison-table tbody tr {
  border-bottom: 1px solid var(--color-comet-grey);
  transition: all var(--transition-fast);
}

.comparison-table tbody tr:hover {
  background: rgba(224, 105, 61, 0.05);
}

.comparison-table td {
  padding: var(--space-lg);
  font-size: var(--text-sm);
}

.comparison-table td:first-child {
  font-weight: 600;
  color: var(--color-quantum-core);
}

.comparison-table td:nth-child(2) {
  color: var(--color-quantum-core);
  opacity: 0.7;
  font-size: var(--text-xs);
}

.comparison-table td:nth-child(3) {
  text-align: center;
}

.comparison-table td:nth-child(4) {
  color: var(--color-verdant-code);
  font-weight: 500;
}

/* ===== INTEGRATIONS GRID ===== */
.integrations-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: var(--space-md);
  margin-top: var(--space-2xl);
}

.integration-tile {
  aspect-ratio: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-lg);
  background: var(--color-white);
  border-radius: var(--radius-xl);
  border: 2px solid var(--color-comet-grey);
  transition: all var(--transition-base);
  cursor: pointer;
}

.integration-tile:hover {
  transform: translateY(-8px) scale(1.05);
  border-color: var(--color-reactor-core);
  box-shadow: var(--shadow-xl);
}

.integration-tile i {
  width: 32px;
  height: 32px;
  color: var(--color-reactor-core);
}

.integration-tile span {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-quantum-core);
  text-align: center;
}

/* ===== PRICING CARDS ===== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-xl);
  margin-top: var(--space-2xl);
}

.pricing-card {
  padding: var(--space-2xl);
  background: var(--color-white);
  border-radius: var(--radius-2xl);
  border: 2px solid var(--color-comet-grey);
  transition: all var(--transition-base);
  position: relative;
}

.pricing-card.featured {
  border-color: var(--color-reactor-core);
  box-shadow: var(--shadow-glow);
  transform: scale(1.05);
}

.pricing-card.featured::before {
  content: 'POPULAR';
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  padding: var(--space-xs) var(--space-md);
  background: var(--gradient-accent);
  color: var(--color-white);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 700;
}

.pricing-card:hover {
  transform: translateY(-10px) scale(1.02);
  box-shadow: var(--shadow-2xl);
}

.pricing-card h3 {
  font-size: var(--text-2xl);
  margin-bottom: var(--space-sm);
  color: var(--color-quantum-core);
}

.pricing-card .price {
  font-size: var(--text-5xl);
  font-weight: 800;
  color: var(--color-reactor-core);
  margin: var(--space-md) 0;
}

.pricing-card .price span {
  font-size: var(--text-lg);
  font-weight: 400;
  color: var(--color-quantum-core);
  opacity: 0.6;
}

.pricing-features {
  list-style: none;
  margin: var(--space-xl) 0;
}

.pricing-features li {
  padding: var(--space-sm) 0;
  display: flex;
  align-items: start;
  gap: var(--space-sm);
  font-size: var(--text-sm);
  color: var(--color-quantum-core);
}

.pricing-features i {
  width: 20px;
  height: 20px;
  color: var(--color-verdant-code);
  flex-shrink: 0;
  margin-top: 2px;
}

/* ===== DEMO FORM ===== */
.demo-form {
  max-width: 600px;
  margin: var(--space-2xl) auto 0;
  padding: var(--space-2xl);
  background: var(--color-white);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-2xl);
}

.form-group {
  margin-bottom: var(--space-lg);
}

.form-group label {
  display: block;
  margin-bottom: var(--space-xs);
  font-weight: 600;
  color: var(--color-quantum-core);
  font-size: var(--text-sm);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: var(--space-md);
  border: 2px solid var(--color-comet-grey);
  border-radius: var(--radius-lg);
  font-family: var(--font-primary);
  font-size: var(--text-base);
  transition: all var(--transition-base);
  background: var(--color-white);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-reactor-core);
  box-shadow: 0 0 0 3px rgba(224, 105, 61, 0.1);
}

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

/* ===== FOOTER ===== */
.footer {
  background: var(--gradient-dark);
  color: var(--color-white);
  padding: var(--space-4xl) 0 var(--space-xl);
}

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

.footer-column h4 {
  color: var(--color-mint-node);
  margin-bottom: var(--space-md);
  font-size: var(--text-lg);
}

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

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

.footer-links a {
  color: var(--color-comet-grey);
  text-decoration: none;
  font-size: var(--text-sm);
  transition: all var(--transition-fast);
  display: inline-block;
}

.footer-links a:hover {
  color: var(--color-reactor-core);
  transform: translateX(5px);
}

.footer-bottom {
  padding-top: var(--space-xl);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.footer-bottom p {
  color: var(--color-comet-grey);
  font-size: var(--text-sm);
  margin: 0;
}

.social-links {
  display: flex;
  gap: var(--space-md);
}

.social-links a {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
  color: var(--color-white);
  transition: all var(--transition-base);
}

.social-links a:hover {
  background: var(--color-reactor-core);
  transform: translateY(-3px) scale(1.1);
}

/* ===== UTILITY CLASSES ===== */
.hidden {
  display: none !important;
}

.fade-in {
  animation: fadeInUp 0.8s ease-out;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .nav {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--color-white);
    flex-direction: column;
    padding: var(--space-lg);
    box-shadow: var(--shadow-xl);
    transform: translateY(-100%);
    opacity: 0;
    transition: all var(--transition-base);
    gap: var(--space-md);
  }

  .nav.mobile-open {
    transform: translateY(0);
    opacity: 1;
  }

  .mobile-menu-toggle {
    display: block;
  }

  .hero {
    min-height: 80vh;
    padding-top: 120px;
  }

  .workflow-diagram {
    flex-direction: column;
  }

  .workflow-arrow {
    transform: rotate(90deg);
  }

  .selector-tabs {
    width: 100%;
  }

  .selector-tab {
    flex: 1;
    min-width: 100px;
  }

  .pricing-card.featured {
    transform: scale(1);
  }
}

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

  .hero h1 {
    font-size: var(--text-3xl);
  }

  .hero-subtitle {
    font-size: var(--text-base);
  }

  .btn-large {
    padding: var(--space-sm) var(--space-lg);
    font-size: var(--text-base);
  }

  .section {
    padding: var(--space-2xl) 0;
  }
}

/* ===== ANIMATIONS ===== */
@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* ===== SCROLL ANIMATIONS ===== */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== FEATURE CARDS ===== */
.feature-card {
  padding: var(--space-2xl);
  background: var(--color-white);
  border-radius: var(--radius-2xl);
  border: 2px solid var(--color-comet-grey);
  transition: all var(--transition-base);
}

.feature-card:hover {
  transform: translateY(-8px);
  border-color: var(--color-reactor-core);
  box-shadow: var(--shadow-2xl);
}

/* ===== ACCENT BARS ===== */
.accent-bar {
  height: 4px;
  background: var(--gradient-accent);
  border-radius: var(--radius-full);
  margin: var(--space-md) 0;
}

/* ===== BADGE ===== */
.badge {
  display: inline-block;
  padding: var(--space-xs) var(--space-md);
  background: var(--gradient-accent);
  color: var(--color-white);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge-outline {
  background: transparent;
  border: 2px solid var(--color-reactor-core);
  color: var(--color-reactor-core);
}