/* ==========================================================================
   AURA STUDIO — Base & Global Styles
   ========================================================================== */

*, *::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(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  letter-spacing: -0.01em;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  transition: background-color var(--transition-smooth), color var(--transition-smooth);
}

/* Custom Selection */
::selection {
  background-color: var(--text-primary);
  color: var(--bg-primary);
}

/* Typography Hierarchy */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 500;
  line-height: 1.15;
  color: var(--text-primary);
  letter-spacing: -0.025em;
}

.font-serif {
  font-family: var(--font-serif);
  font-weight: 400;
  letter-spacing: -0.01em;
}

.font-display {
  font-family: var(--font-display);
}

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

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

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

input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
  background: transparent;
  outline: none;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xs);
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

input:focus, select:focus, textarea:focus {
  border-color: var(--text-primary);
}

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

ul, ol {
  list-style: none;
}

/* Layout Utilities */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.container-narrow {
  width: 100%;
  max-width: var(--max-width-narrow);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.section-spacing {
  padding-top: var(--space-4xl);
  padding-bottom: var(--space-4xl);
}

.flex {
  display: flex;
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.flex-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.grid {
  display: grid;
}

/* Accessibility */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}