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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-main);
  background-color: var(--dark-bg);
  color: var(--gray-text);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

body.nav-open {
  overflow: hidden;
}

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

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

ul {
  list-style: none;
}

/* Typography */
h1 {
  font-size: clamp(36px, 5.5vw, 68px);
  font-weight: 700;
  color: var(--white);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 700;
  color: var(--white);
  line-height: 1.2;
  letter-spacing: -0.01em;
}

h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--white);
  line-height: 1.4;
}

h4 {
  font-size: 16px;
  font-weight: 600;
  color: var(--white);
}

p {
  color: var(--gray-text);
  line-height: 1.7;
}

/* Gradient text utility */
.gradient-text {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Container */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--section-pad-h);
}

/* Section */
section {
  padding: var(--section-pad-v) var(--section-pad-h);
}

.section-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

/* Section header */
.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-header h2 {
  margin: 16px 0 20px;
}

.section-header p {
  max-width: 640px;
  margin: 0 auto;
  font-size: 17px;
}

/* Section tag/badge */
.section-tag {
  display: inline-block;
  padding: 5px 16px;
  border-radius: 50px;
  border: 1px solid rgba(0, 194, 212, 0.25);
  background: rgba(0, 194, 212, 0.06);
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.section-tag.purple {
  border-color: rgba(123, 63, 242, 0.25);
  background: rgba(123, 63, 242, 0.06);
  color: var(--purple);
}

.section-tag.blue {
  border-color: rgba(46, 139, 247, 0.25);
  background: rgba(46, 139, 247, 0.06);
  color: var(--blue);
}

.section-tag.violet {
  border-color: rgba(155, 89, 240, 0.25);
  background: rgba(155, 89, 240, 0.06);
  color: var(--violet);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 16px 36px;
  border-radius: 12px;
  font-size: 16px;
  font-weight: 600;
  font-family: var(--font-main);
  cursor: pointer;
  border: none;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--gradient-cta);
  color: var(--white);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 194, 212, 0.35);
  color: var(--white);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.06);
  color: var(--white);
  font-weight: 500;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-secondary:hover {
  transform: translateY(-2px);
  background: rgba(255, 255, 255, 0.1);
  color: var(--white);
}

/* Dot grid background */
.dot-grid {
  background-image: radial-gradient(circle, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 32px 32px;
}

/* Fade-up animation */
.fade-up {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* Page header */
.page-header {
  padding-top: 152px;
  padding-bottom: 80px;
  padding-left: var(--section-pad-h);
  padding-right: var(--section-pad-h);
  text-align: center;
  background: var(--dark-bg);
  position: relative;
  overflow: hidden;
}

.page-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 400px;
  background: radial-gradient(ellipse at center top, rgba(0, 194, 212, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.page-header-inner {
  max-width: 800px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.page-header .section-tag {
  margin-bottom: 24px;
}

.page-header h1 {
  margin-bottom: 24px;
}

.page-header p {
  font-size: 17px;
  max-width: 680px;
  margin: 0 auto 16px;
}