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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.65;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  padding-top: 102px; /* Offset for frozen fixed desktop masthead */
}

@media (max-width: 992px) {
  body {
    padding-top: 64px; /* Offset for frozen fixed mobile masthead */
  }
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--color-text);
  line-height: 1.25;
  font-weight: 700;
  letter-spacing: -0.02em;
}

p {
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-md);
  font-size: 1rem;
  line-height: 1.7;
}

p:last-child {
  margin-bottom: 0;
}

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

a:hover {
  color: var(--color-primary-hover);
}

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

main {
  flex: 1;
  padding-bottom: var(--spacing-2xl);
}

.container {
  width: 100%;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--spacing-md);
  padding-right: var(--spacing-md);
}

.container--narrow {
  max-width: 960px;
}

.container--wide {
  max-width: 1360px;
}

/* Common Section Wrapper */
.section {
  padding-top: var(--spacing-2xl);
  padding-bottom: var(--spacing-2xl);
}

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

/* Glass Surface Utility */
.glass-panel {
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(231, 229, 228, 0.8);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

/* Focus styles for accessibility */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}