/* Reset & Base Styles */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: var(--weight-normal);
  line-height: 1.6;
  color: var(--color-text-dark);
  background-color: var(--color-bg-white);
  overflow-x: hidden;
}

/* Typography Base */
h1, h2, h3, h4, h5, h6 {
  font-weight: var(--weight-bold);
  line-height: 1.25;
  color: var(--color-primary);
  letter-spacing: -0.02em;
}

p {
  color: var(--color-text-muted);
}

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

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

/* Layout Utilities */
.container {
  width: 100%;
  max-width: var(--container-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--spacing-6);
  padding-right: var(--spacing-6);
}

.section {
  padding-top: var(--section-padding);
  padding-bottom: var(--section-padding);
}

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

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

.section-bg-dark h2,
.section-bg-dark h3 {
  color: var(--color-bg-white);
}

.section-bg-dark p {
  color: var(--color-text-light);
}

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

/* Header Text Alignments & Badges */
.section-header {
  max-width: 700px;
  margin: 0 auto var(--spacing-16) auto;
}

.section-badge {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-secondary);
  background-color: rgba(37, 99, 235, 0.08);
  padding: var(--spacing-2) var(--spacing-4);
  border-radius: var(--radius-full);
  margin-bottom: var(--spacing-4);
}

.section-bg-dark .section-badge {
  color: var(--color-accent);
  background-color: rgba(56, 189, 248, 0.08);
}

.section-title {
  font-size: var(--text-5xl);
  margin-bottom: var(--spacing-4);
}

@media (max-width: 768px) {
  .section-title {
    font-size: var(--text-3xl);
  }
  .section {
    padding-top: 5rem;
    padding-bottom: 5rem;
  }
}

/* Premium Buttons System */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-base);
  font-weight: var(--weight-semibold);
  padding: 1rem 2.5rem;
  border-radius: var(--radius-full);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-normal);
  white-space: nowrap;
  font-family: var(--font-sans);
}

.btn-primary {
  background-color: var(--color-accent);
  color: var(--color-primary);
  box-shadow: 0 4px 14px 0 rgba(56, 189, 248, 0.25);
}

.btn-primary:hover {
  background-color: #58d0ff;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px 0 rgba(56, 189, 248, 0.4);
}

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

.btn-secondary:hover {
  background-color: rgba(15, 23, 42, 0.04);
  border-color: var(--color-secondary);
  color: var(--color-secondary);
  transform: translateY(-2px);
}

.section-bg-dark .btn-secondary {
  color: var(--color-bg-white);
  border-color: var(--color-bg-white);
}

.section-bg-dark .btn-secondary:hover {
  background-color: rgba(255, 255, 255, 0.05);
  border-color: var(--color-accent);
  color: var(--color-accent);
  transform: translateY(-2px);
}

/* Animations */
.fade-in-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

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

.delay-100 { transition-delay: 0.1s; }
.delay-200 { transition-delay: 0.2s; }
.delay-300 { transition-delay: 0.3s; }
.delay-400 { transition-delay: 0.4s; }

/* Micro-animations */
@keyframes pulseGlow {
  0% { transform: scale(0.95); opacity: 0.5; }
  50% { transform: scale(1.05); opacity: 0.8; }
  100% { transform: scale(0.95); opacity: 0.5; }
}

.glow-element {
  position: relative;
}
.glow-element::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: radial-gradient(circle, var(--color-accent) 0%, transparent 70%);
  z-index: -1;
  filter: blur(40px);
  opacity: 0.15;
  animation: pulseGlow 6s infinite;
}