/* ===== DESIGN SYSTEM ===== */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@200;300;400;500;600;700;800&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@300;400;500;600;700&display=swap');

:root {
  --black: #000000;
  --white: #ffffff;
  --off-white: #f5f5f7;
  --gray-100: #e8e8ed;
  --gray-200: #d2d2d7;
  --gray-400: #86868b;
  --gray-500: #6e6e73;
  --gray-600: #424245;
  --gray-800: #1d1d1f;
  --gray-900: #111111;
  --cyan: #00d4ff;
  --cyan-dim: #00a8cc;
  --cyan-glow: rgba(0, 212, 255, 0.15);
  --blue: #0071e3;
  --purple: #a855f7;
  --gradient-text: linear-gradient(135deg, #00d4ff, #0071e3, #a855f7);
  --gradient-dark: linear-gradient(180deg, #000 0%, #0a0a0a 100%);
  --neon-cyan: 0 0 7px #00d4ff, 0 0 10px #00d4ff, 0 0 21px #00d4ff, 0 0 42px #0071e3;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-display: 'Space Grotesk', 'Inter', sans-serif;
  --nav-height: 56px;
  --section-padding: 120px 0;
  --max-width: 1200px;
  --transition: 0.3s cubic-bezier(0.25, 0.1, 0.25, 1);
}

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

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

body {
  font-family: var(--font);
  color: var(--white);
  background: var(--black);
  line-height: 1.6;
  overflow-x: hidden;
}

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

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

ul {
  list-style: none;
}

/* ===== NAVIGATION ===== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 0 48px;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: background var(--transition), backdrop-filter var(--transition), border-color var(--transition);
  border-bottom: 1px solid transparent;
}

.nav.scrolled {
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
}

.nav-logo svg {
  width: 32px;
  height: 32px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links a {
  font-size: 0.875rem;
  font-weight: 400;
  color: var(--white);
  opacity: 0.85;
  transition: opacity var(--transition);
  letter-spacing: -0.01em;
}

.nav-links a:hover {
  opacity: 1;
}

.nav-cta {
  font-size: 0.825rem !important;
  font-weight: 500 !important;
  padding: 8px 20px;
  border: 1px solid rgba(255, 255, 255, 0.5);
  border-radius: 980px;
  opacity: 1 !important;
  transition: background var(--transition), color var(--transition), border-color var(--transition) !important;
}

.nav-cta:hover {
  background: var(--white);
  color: var(--black);
  border-color: var(--white);
}

.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
}

.nav-hamburger span {
  width: 22px;
  height: 1.5px;
  background: var(--white);
  transition: transform var(--transition), opacity var(--transition);
}

.nav-hamburger.active span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}

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

.nav-hamburger.active span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* Mobile menu */
.mobile-menu {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.97);
  backdrop-filter: blur(30px);
  z-index: 999;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 32px;
}

.mobile-menu.active {
  display: flex;
}

.mobile-menu a {
  font-size: 1.5rem;
  font-weight: 300;
  color: var(--white);
  opacity: 0;
  animation: fadeInUp 0.4s ease forwards;
}

.mobile-menu a:nth-child(1) {
  animation-delay: 0.05s;
}

.mobile-menu a:nth-child(2) {
  animation-delay: 0.1s;
}

.mobile-menu a:nth-child(3) {
  animation-delay: 0.15s;
}

.mobile-menu a:nth-child(4) {
  animation-delay: 0.2s;
}

.mobile-menu a:nth-child(5) {
  animation-delay: 0.25s;
}

.mobile-menu a:nth-child(6) {
  animation-delay: 0.3s;
}

/* ===== HERO SECTION — Cinematic ===== */
.hero {
  position: relative;
  width: 100%;
  height: 100vh;
  min-height: 600px;
  display: flex;
  align-items: flex-end;
  padding: 80px 48px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top,
      rgba(0, 0, 0, 0.9) 0%,
      rgba(0, 0, 0, 0.5) 35%,
      rgba(0, 0, 0, 0.15) 65%,
      rgba(0, 0, 0, 0.4) 100%);
}

/* Film Grain Overlay */
.hero-grain {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  opacity: 0.035;
  mix-blend-mode: overlay;
}

/* Mouse-follow glow */
.hero-glow {
  position: absolute;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 212, 255, 0.08) 0%, transparent 70%);
  pointer-events: none;
  z-index: 1;
  transform: translate(-50%, -50%);
  transition: left 0.3s ease-out, top 0.3s ease-out;
  filter: blur(40px);
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 720px;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 6vw, 5rem);
  font-weight: 300;
  letter-spacing: -0.04em;
  line-height: 1.05;
  margin-bottom: 24px;
}

.hero h1 .word {
  display: inline-block;
  opacity: 0;
  transform: translateY(40px) rotateX(-15deg);
  animation: heroWordReveal 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.hero h1 .word:nth-child(1) {
  animation-delay: 0.6s;
}

.hero h1 .word:nth-child(2) {
  animation-delay: 0.75s;
}

.hero h1 .word:nth-child(3) {
  animation-delay: 0.9s;
}

.hero h1 .word:nth-child(4) {
  animation-delay: 1.05s;
}

@keyframes heroWordReveal {
  to {
    opacity: 1;
    transform: translateY(0) rotateX(0deg);
  }
}

.hero h1 .word-accent {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 500;
}

.hero p {
  font-size: clamp(1rem, 1.5vw, 1.2rem);
  font-weight: 300;
  opacity: 0;
  max-width: 520px;
  margin-bottom: 36px;
  line-height: 1.8;
  animation: heroFadeIn 0.8s ease forwards;
  animation-delay: 1.3s;
}

@keyframes heroFadeIn {
  to {
    opacity: 0.8;
  }
}

.hero .btn-pill {
  opacity: 0;
  transform: translateY(20px);
  animation: heroFadeIn2 0.6s ease forwards;
  animation-delay: 1.6s;
}

@keyframes heroFadeIn2 {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Hero scroll indicator */
.hero-scroll-indicator {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  opacity: 0;
  animation: heroFadeIn2 0.6s ease forwards;
  animation-delay: 2s;
}

.hero-scroll-indicator span {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  opacity: 0.4;
}

.scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--cyan), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {

  0%,
  100% {
    opacity: 0.3;
    transform: scaleY(0.6);
  }

  50% {
    opacity: 1;
    transform: scaleY(1);
  }
}

.btn-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 980px;
  font-size: 0.95rem;
  font-weight: 500;
  font-family: var(--font);
  cursor: pointer;
  transition: all var(--transition);
  border: none;
  letter-spacing: -0.01em;
}

.btn-pill-primary {
  background: var(--white);
  color: var(--black);
}

.btn-pill-primary:hover {
  background: var(--off-white);
  transform: scale(1.03);
}

.btn-pill-outline {
  background: transparent;
  color: var(--white);
  border: 1px solid rgba(255, 255, 255, 0.4);
}

.btn-pill-outline:hover {
  border-color: var(--white);
  background: rgba(255, 255, 255, 0.08);
}

.btn-arrow {
  font-size: 1.1em;
  transition: transform var(--transition);
}

.btn-pill:hover .btn-arrow {
  transform: translateX(3px);
}

/* ===== SECTION COMMONS ===== */
.section {
  padding: var(--section-padding);
  position: relative;
}

.section-light {
  background: var(--off-white);
  color: var(--gray-800);
}

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

.section-deep {
  background: var(--gray-900);
  color: var(--white);
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 48px;
}

.section-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--cyan);
  margin-bottom: 16px;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 300;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 24px;
}

.section-subtitle {
  font-size: clamp(1rem, 1.5vw, 1.15rem);
  font-weight: 300;
  line-height: 1.7;
  opacity: 0.7;
  max-width: 640px;
}

/* ===== MISSION (Typewriter) ===== */
.mission {
  padding: 160px 0;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.mission-text {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 300;
  letter-spacing: -0.02em;
  line-height: 1.4;
  max-width: 900px;
  color: var(--gray-800);
}

.typewriter-word {
  color: var(--black);
  font-weight: 600;
  position: relative;
}

.typewriter-cursor {
  display: inline-block;
  width: 2px;
  height: 0.9em;
  background: var(--cyan);
  margin-left: 2px;
  vertical-align: text-bottom;
  animation: blink 1s step-end infinite;
}

@keyframes blink {
  50% {
    opacity: 0;
  }
}

/* ===== PROBLEM SECTION ===== */
.problem-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.problem-text h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  font-weight: 300;
  letter-spacing: -0.02em;
  line-height: 1.25;
  margin-bottom: 24px;
}

.problem-text p {
  font-size: 1.05rem;
  font-weight: 300;
  line-height: 1.8;
  opacity: 0.7;
  margin-bottom: 20px;
}

.problem-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.stat-card {
  padding: 32px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 16px;
  text-align: center;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 0%, rgba(0, 212, 255, 0.06) 0%, transparent 60%);
  opacity: 0;
  transition: opacity var(--transition);
}

.stat-card:hover {
  border-color: rgba(0, 212, 255, 0.25);
  transform: translateY(-6px);
  box-shadow: 0 20px 60px rgba(0, 212, 255, 0.06);
}

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

.stat-number {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 200;
  color: var(--cyan);
  letter-spacing: -0.03em;
  margin-bottom: 8px;
  position: relative;
  text-shadow: 0 0 20px rgba(0, 212, 255, 0.3);
}

.stat-label {
  font-size: 0.85rem;
  font-weight: 400;
  opacity: 0.6;
  letter-spacing: 0.02em;
}

/* ===== HOW IT WORKS (Sticky Scroll) ===== */
.how-it-works {
  padding: 0;
}

.how-header {
  padding: 120px 0 60px;
  text-align: center;
}

.how-steps {
  position: relative;
}

.how-step {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
}

.how-step-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 48px;
}

.how-step-content {
  opacity: 0;
  transform: translateY(40px);
  transition: all 0.7s cubic-bezier(0.25, 0.1, 0.25, 1);
}

.how-step.visible .how-step-content {
  opacity: 1;
  transform: translateY(0);
}

.how-step-number {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--cyan);
  margin-bottom: 16px;
}

.how-step-title {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 300;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
  line-height: 1.2;
}

.how-step-desc {
  font-size: 1.05rem;
  font-weight: 300;
  line-height: 1.8;
  opacity: 0.7;
}

.how-step-visual {
  position: relative;
  border-radius: 20px;
  overflow: hidden;
  aspect-ratio: 4/3;
  opacity: 0;
  transform: scale(0.95);
  transition: all 0.8s cubic-bezier(0.25, 0.1, 0.25, 1) 0.1s;
}

.how-step.visible .how-step-visual {
  opacity: 1;
  transform: scale(1);
}

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

.how-step-visual::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 20px;
  border: 1px solid rgba(255, 255, 255, 0.06);
  pointer-events: none;
}

/* ===== FEATURES GRID ===== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 64px;
}

.feature-card {
  padding: 40px 32px;
  background: var(--white);
  border-radius: 20px;
  border: 1px solid var(--gray-100);
  transition: transform var(--transition), box-shadow var(--transition);
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.08);
}

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.1), rgba(0, 113, 227, 0.1));
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  font-size: 1.4rem;
}

.feature-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--gray-800);
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}

.feature-card p {
  font-size: 0.95rem;
  font-weight: 300;
  color: var(--gray-500);
  line-height: 1.6;
}

/* ===== USE CASES ===== */
.use-cases-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 64px;
}

.use-case-card {
  position: relative;
  border-radius: 20px;
  overflow: hidden;
  aspect-ratio: 16/10;
  cursor: pointer;
}

.use-case-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.25, 0.1, 0.25, 1);
}

.use-case-card:hover img {
  transform: scale(1.05);
}

.use-case-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.8) 0%, transparent 60%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 32px;
}

.use-case-overlay h3 {
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.use-case-overlay p {
  font-size: 0.9rem;
  font-weight: 300;
  opacity: 0.8;
  line-height: 1.6;
}

.use-case-card.wide {
  grid-column: span 2;
  aspect-ratio: 2.5/1;
}

/* ===== PRODUCT — Vertical Tabs ===== */
.product-tabs-container {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 60px;
  margin-top: 64px;
  min-height: 520px;
}

.product-tab-nav {
  display: flex;
  flex-direction: column;
  gap: 0;
  position: relative;
}

.product-tab-btn {
  background: none;
  border: none;
  color: var(--white);
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 400;
  padding: 20px 24px;
  text-align: left;
  cursor: pointer;
  opacity: 0.4;
  transition: opacity var(--transition), padding-left var(--transition);
  position: relative;
  border-left: 2px solid rgba(255, 255, 255, 0.06);
}

.product-tab-btn.active {
  opacity: 1;
  padding-left: 32px;
}

.product-tab-btn:hover {
  opacity: 0.8;
}

.product-tab-btn .tab-desc {
  display: block;
  font-family: var(--font);
  font-size: 0.85rem;
  font-weight: 300;
  opacity: 0.5;
  margin-top: 4px;
}

/* Sliding active indicator */
.tab-indicator {
  position: absolute;
  left: 0;
  top: 0;
  width: 2px;
  height: 62px;
  background: var(--cyan);
  border-radius: 1px;
  transition: top 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 0 12px rgba(0, 212, 255, 0.4);
}

.product-tab-content {
  position: relative;
  overflow: hidden;
}

.product-tab-panel {
  opacity: 0;
  transform: translateX(30px);
  transition: opacity 0.5s ease, transform 0.5s ease;
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  pointer-events: none;
}

.product-tab-panel.active {
  opacity: 1;
  transform: translateX(0);
  position: relative;
  pointer-events: auto;
}

.product-items-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.product-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 24px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  transition: transform var(--transition), background var(--transition);
}

.product-item:hover {
  transform: translateX(8px);
}

.product-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cyan);
  margin-top: 8px;
  flex-shrink: 0;
  box-shadow: 0 0 8px rgba(0, 212, 255, 0.4);
}

.product-item-text h4 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 500;
  margin-bottom: 4px;
  letter-spacing: -0.01em;
}

.product-item-text p {
  font-size: 0.9rem;
  font-weight: 300;
  opacity: 0.6;
  line-height: 1.5;
}

/* ===== ARCHITECTURE — Animated SVG ===== */
.architecture {
  margin-top: 80px;
  padding: 48px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 24px;
  position: relative;
  overflow: hidden;
}

.architecture::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 50%, rgba(0, 212, 255, 0.03) 0%, transparent 70%);
  pointer-events: none;
}

.architecture h3 {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--cyan);
  margin-bottom: 40px;
  text-align: center;
  position: relative;
}

.arch-svg-container {
  width: 100%;
  max-width: 800px;
  margin: 0 auto;
  position: relative;
}

.arch-svg-container svg {
  width: 100%;
  height: auto;
}

/* SVG Architecture node styles */
.arch-svg-node {
  cursor: pointer;
  transition: filter 0.3s ease;
}

.arch-svg-node:hover {
  filter: brightness(1.3);
}

.arch-svg-node rect,
.arch-svg-node circle {
  transition: stroke var(--transition), fill var(--transition);
}

/* Animated data flow paths */
.data-flow-path {
  fill: none;
  stroke: var(--cyan);
  stroke-width: 1.5;
  stroke-dasharray: 8 12;
  animation: dataFlow 2s linear infinite;
  opacity: 0.6;
}

@keyframes dataFlow {
  to {
    stroke-dashoffset: -40;
  }
}

/* Central core pulse */
.arch-core-glow {
  animation: corePulse 3s ease-in-out infinite;
}

@keyframes corePulse {

  0%,
  100% {
    opacity: 0.3;
    r: 45;
  }

  50% {
    opacity: 0.6;
    r: 55;
  }
}

/* Legacy arch-flow - keep for fallback */
.arch-flow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  flex-wrap: wrap;
}

.arch-node {
  padding: 12px 20px;
  background: rgba(0, 212, 255, 0.06);
  border: 1px solid rgba(0, 212, 255, 0.15);
  border-radius: 10px;
  font-size: 0.85rem;
  font-weight: 500;
  white-space: nowrap;
  transition: background var(--transition);
}

.arch-node:hover {
  background: rgba(0, 212, 255, 0.12);
}

.arch-arrow {
  padding: 0 8px;
  font-size: 1.2rem;
  color: var(--gray-500);
}

/* ===== TRACTION ===== */
.traction-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 24px;
  margin-top: 64px;
}

.traction-item {
  text-align: center;
  padding: 40px 16px;
  border-radius: 20px;
  transition: background var(--transition), transform var(--transition);
  position: relative;
}

.traction-item:hover {
  background: rgba(0, 0, 0, 0.04);
  transform: translateY(-4px);
}

.traction-value {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 200;
  letter-spacing: -0.04em;
  margin-bottom: 12px;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.traction-desc {
  font-size: 0.9rem;
  font-weight: 300;
  opacity: 0.6;
  line-height: 1.5;
}

/* Grant highlight */
.traction-item.grant-highlight {
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.06), rgba(168, 85, 247, 0.06));
  border: 1px solid rgba(0, 212, 255, 0.15);
  border-radius: 20px;
}

.traction-item.grant-highlight:hover {
  border-color: rgba(0, 212, 255, 0.3);
  box-shadow: 0 8px 40px rgba(0, 212, 255, 0.08);
}

.grant-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 980px;
  background: rgba(0, 212, 255, 0.1);
  border: 1px solid rgba(0, 212, 255, 0.2);
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--cyan);
  margin-top: 8px;
}

/* ===== VISION ===== */
.vision {
  padding: 180px 0;
  text-align: center;
}

.vision-text {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: 200;
  letter-spacing: -0.03em;
  line-height: 1.25;
  max-width: 900px;
  margin: 0 auto 24px;
}

.vision-gradient {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 400;
}

.vision-sub {
  font-size: 1.1rem;
  font-weight: 300;
  opacity: 0.5;
  max-width: 600px;
  margin: 0 auto 48px;
  line-height: 1.7;
}

/* ===== COUNTDOWN CTA ===== */
.countdown-cta {
  padding: 120px 0;
  background: linear-gradient(180deg, #000 0%, #050510 50%, #000 100%);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.countdown-cta::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(0, 212, 255, 0.04) 0%, transparent 60%);
  pointer-events: none;
}

.countdown-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--cyan);
  margin-bottom: 20px;
}

.countdown-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: 300;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
  line-height: 1.15;
}

.countdown-title .countdown-accent {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 500;
}

.countdown-sub {
  font-size: 1.05rem;
  font-weight: 300;
  opacity: 0.5;
  margin-bottom: 48px;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.7;
}

.countdown-timer {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-bottom: 48px;
}

.countdown-unit {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.countdown-number {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 300;
  letter-spacing: -0.03em;
  color: var(--white);
  min-width: 100px;
  padding: 16px 8px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 16px;
  backdrop-filter: blur(8px);
  position: relative;
  overflow: hidden;
  transition: border-color 0.3s ease;
}

.countdown-number::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 1px;
  background: rgba(255, 255, 255, 0.04);
}

.countdown-number:hover {
  border-color: rgba(0, 212, 255, 0.2);
}

.countdown-unit-label {
  font-size: 0.7rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  opacity: 0.3;
}

.countdown-separator {
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: 200;
  color: var(--cyan);
  opacity: 0.4;
  align-self: flex-start;
  padding-top: 20px;
  animation: separatorBlink 1.5s ease-in-out infinite;
}

@keyframes separatorBlink {

  0%,
  100% {
    opacity: 0.4;
  }

  50% {
    opacity: 0.1;
  }
}

/* ===== TEAM ===== */
.team-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  margin-top: 64px;
}

.team-card {
  text-align: center;
  padding: 40px 24px;
  background: var(--white);
  border-radius: 20px;
  border: 1px solid var(--gray-100);
  transition: transform var(--transition);
}

.team-card:hover {
  transform: translateY(-4px);
}

.team-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--cyan), var(--blue));
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  font-size: 1.8rem;
  font-weight: 300;
  color: var(--white);
}

.team-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--gray-800);
  margin-bottom: 4px;
}

.team-card p {
  font-size: 0.85rem;
  font-weight: 400;
  color: var(--gray-500);
}

/* ===== FOOTER ===== */
.footer {
  padding: 80px 0 40px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 60px;
}

.footer-brand p {
  font-size: 0.9rem;
  font-weight: 300;
  opacity: 0.5;
  line-height: 1.7;
  margin-top: 16px;
  max-width: 300px;
}

.footer-col h4 {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: 20px;
  opacity: 0.5;
}

.footer-col a {
  display: block;
  font-size: 0.9rem;
  font-weight: 300;
  opacity: 0.6;
  margin-bottom: 12px;
  transition: opacity var(--transition), color var(--transition);
}

.footer-col a:hover {
  opacity: 1;
  color: var(--cyan);
}

.footer-bottom {
  padding-top: 32px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-bottom p {
  font-size: 0.8rem;
  opacity: 0.4;
}

.footer-social {
  display: flex;
  gap: 20px;
}

.footer-social a {
  font-size: 0.85rem;
  opacity: 0.5;
  transition: opacity var(--transition);
}

.footer-social a:hover {
  opacity: 1;
}

/* ===== ANIMATED GRID BACKGROUND ===== */
.grid-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
  opacity: 0.3;
}

.grid-bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 212, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 212, 255, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  animation: gridShift 20s linear infinite;
}

@keyframes gridShift {
  to {
    transform: translateY(60px);
  }
}

/* ===== SCROLL ANIMATIONS ===== */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s cubic-bezier(0.25, 0.1, 0.25, 1), transform 0.8s cubic-bezier(0.25, 0.1, 0.25, 1);
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in-delay-1 {
  transition-delay: 0.1s;
}

.fade-in-delay-2 {
  transition-delay: 0.2s;
}

.fade-in-delay-3 {
  transition-delay: 0.3s;
}

.fade-in-delay-4 {
  transition-delay: 0.4s;
}

.fade-in-delay-5 {
  transition-delay: 0.5s;
}

/* Staggered card entrance */
.stagger-enter .product-item,
.stagger-enter .traction-item {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.stagger-enter.visible .product-item,
.stagger-enter.visible .traction-item {
  opacity: 1;
  transform: translateY(0);
}

.stagger-enter.visible .product-item:nth-child(1),
.stagger-enter.visible .traction-item:nth-child(1) {
  transition-delay: 0.05s;
}

.stagger-enter.visible .product-item:nth-child(2),
.stagger-enter.visible .traction-item:nth-child(2) {
  transition-delay: 0.1s;
}

.stagger-enter.visible .product-item:nth-child(3),
.stagger-enter.visible .traction-item:nth-child(3) {
  transition-delay: 0.15s;
}

.stagger-enter.visible .product-item:nth-child(4),
.stagger-enter.visible .traction-item:nth-child(4) {
  transition-delay: 0.2s;
}

.stagger-enter.visible .product-item:nth-child(5),
.stagger-enter.visible .traction-item:nth-child(5) {
  transition-delay: 0.25s;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }

  .product-tabs-container {
    grid-template-columns: 200px 1fr;
    gap: 40px;
  }

  .countdown-timer {
    gap: 16px;
  }
}

@media (max-width: 768px) {
  :root {
    --section-padding: 80px 0;
    --nav-height: 52px;
  }

  .nav {
    padding: 0 24px;
  }

  .nav-links {
    display: none;
  }

  .nav-hamburger {
    display: flex;
  }

  .hero {
    padding: 60px 24px;
  }

  .container {
    padding: 0 24px;
  }

  .mission {
    padding: 100px 0;
  }

  .problem-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .how-step-inner {
    grid-template-columns: 1fr;
    gap: 40px;
    padding: 0 24px;
  }

  .how-step {
    min-height: auto;
    padding: 60px 0;
  }

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

  .use-cases-grid {
    grid-template-columns: 1fr;
  }

  .use-case-card.wide {
    grid-column: span 1;
    aspect-ratio: 16/10;
  }

  .product-tabs-container {
    grid-template-columns: 1fr;
    gap: 32px;
    min-height: auto;
  }

  .product-tab-nav {
    flex-direction: row;
    gap: 0;
  }

  .product-tab-btn {
    border-left: none;
    border-bottom: 2px solid rgba(255, 255, 255, 0.06);
    padding: 16px 20px;
    text-align: center;
    flex: 1;
  }

  .product-tab-btn.active {
    padding-left: 20px;
  }

  .product-tab-btn .tab-desc {
    display: none;
  }

  .tab-indicator {
    width: 50%;
    height: 2px;
    top: auto;
    bottom: 0;
    left: 0;
    transition: left 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  }

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

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

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }

  .arch-flow {
    flex-direction: column;
    gap: 8px;
  }

  .arch-arrow {
    transform: rotate(90deg);
    padding: 4px 0;
  }

  .vision {
    padding: 100px 0;
  }

  .countdown-cta {
    padding: 80px 0;
  }

  .countdown-timer {
    gap: 12px;
    flex-wrap: wrap;
  }

  .countdown-number {
    min-width: 70px;
    padding: 12px 4px;
  }

  .countdown-separator {
    display: none;
  }

  .hero-scroll-indicator {
    display: none;
  }
}

@media (max-width: 480px) {
  .traction-grid {
    grid-template-columns: 1fr;
  }

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

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

  .countdown-timer {
    gap: 10px;
  }

  .countdown-number {
    min-width: 60px;
    font-size: 2rem;
  }
}

/* ===== KEYFRAMES ===== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }

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

@keyframes float {

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

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

@keyframes pulse-glow {

  0%,
  100% {
    box-shadow: 0 0 20px var(--cyan-glow);
  }

  50% {
    box-shadow: 0 0 40px var(--cyan-glow), 0 0 80px rgba(0, 212, 255, 0.05);
  }
}

/* Page loading animation */
.page-loader {
  position: fixed;
  inset: 0;
  background: var(--black);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.6s ease, visibility 0.6s ease;
}

.page-loader.hidden {
  opacity: 0;
  visibility: hidden;
}

.loader-logo {
  animation: pulse-glow 2s ease-in-out infinite;
  padding: 20px;
  border-radius: 50%;
}

.nav-img {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  object-fit: cover;
}

.loader-img {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  object-fit: cover;
}