*, *::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-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text-body);
  background: var(--color-white);
  overflow-x: hidden;
}

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

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

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
}

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

.container--narrow {
  max-width: var(--container-narrow);
}

.section-header {
  text-align: center;
  margin-bottom: var(--gap-3xl);
}

.section-title {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  color: var(--color-text-dark);
  margin-bottom: var(--gap-md);
  line-height: 1.2;
}

.section-title--light {
  color: var(--color-white);
}

.section-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto;
}

.section-subtitle--light {
  color: var(--color-text-light-muted);
}

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

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--gap-sm);
  padding: 14px 28px;
  border-radius: var(--radius-md);
  font-size: var(--font-size-base);
  font-weight: 600;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.btn:hover {
  transform: translateY(-1px);
}

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

.btn--primary:hover {
  box-shadow: 0 4px 20px rgba(34, 211, 238, 0.3);
}

.btn--ghost {
  background: transparent;
  border: 1px solid var(--color-dark-border);
  color: #e2e8f0;
}

.btn--ghost:hover {
  border-color: var(--color-text-light-muted);
  background: rgba(255, 255, 255, 0.05);
}

/* Modal */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base), visibility var(--transition-base);
}

.modal.open {
  opacity: 1;
  visibility: visible;
}

.modal__overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.8);
}

.modal__content {
  position: relative;
  width: 90%;
  max-width: 800px;
  background: var(--color-dark-primary);
  border-radius: var(--radius-xl);
  border: 1px solid rgba(255, 255, 255, 0.1);
  overflow: hidden;
}

.modal__close {
  position: absolute;
  top: 12px;
  right: 16px;
  font-size: 28px;
  color: var(--color-text-muted);
  z-index: 1;
  transition: color var(--transition-fast);
}

.modal__close:hover {
  color: var(--color-white);
}

.modal__video-container {
  aspect-ratio: 16 / 9;
  display: flex;
  align-items: center;
  justify-content: center;
}