/* Base resets & typography - ClarvoTech */

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  width: 100%;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-main);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
  width: 100%;
  isolation: isolate;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* Scrollbar Customization */
::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: var(--bg-main);
}

::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: var(--radius-full);
  border: 2px solid var(--bg-main);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* Custom Text Selection */
::selection {
  background-color: rgba(59, 130, 246, 0.3);
  color: var(--text-primary);
}

/* Typography styles */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.15;
  color: var(--text-primary);
  letter-spacing: -0.025em;
}

h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
}

h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: var(--space-md);
}

h3 {
  font-size: clamp(1.35rem, 2.5vw, 1.8rem);
  margin-bottom: var(--space-sm);
}

p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.7;
}

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

/* Utility Layout Classes */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

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

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

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

.center-text {
  text-align: center;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: var(--space-xxl);
}

.subtitle {
  text-transform: uppercase;
  font-size: 0.85rem;
  letter-spacing: 0.15em;
  font-weight: 600;
  color: #3b82f6;
  margin-bottom: var(--space-md);
  display: inline-block;
}

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

/* Accessible focus outline */
*:focus-visible {
  outline: 2px solid #3b82f6;
  outline-offset: 4px;
}