/* ==============================================================================
   veilanon — Base Styles & Resets
   ============================================================================== */

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

/* Accessibility Skip Link */
.skip-link {
  position: absolute;
  top: -9999px;
  left: 1rem;
  z-index: 9999;
  padding: 0.75rem 1.25rem;
  background: var(--accent-tertiary);
  color: #ffffff;
  font-weight: 700;
  border-radius: var(--radius-sm);
  text-decoration: none;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
}

.skip-link:focus {
  top: 1rem;
  outline: 3px solid #ffffff;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 24px);
  text-size-adjust: 100%;
  -webkit-text-size-adjust: 100%;
  background-color: var(--bg-canvas);
  color: var(--text-primary);
  width: 100%;
  max-width: 100vw;
  overflow-x: hidden;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-canvas);
  background-image: 
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(139, 92, 246, 0.15), transparent 70%),
    radial-gradient(ellipse 60% 40% at 50% 100%, rgba(124, 58, 237, 0.08), transparent 70%);
  background-attachment: fixed;
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  width: 100%;
  max-width: 100vw;
  overflow-x: hidden;
  position: relative;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.main-content {
  width: 100%;
  max-width: 100vw;
  overflow-x: hidden;
}

/* Accessible Focus States */
:focus-visible {
  outline: 2px solid var(--accent-primary);
  outline-offset: 3px;
  border-radius: var(--radius-xs);
}

/* Custom Selection */
::selection {
  background: var(--accent-secondary);
  color: #ffffff;
}

/* Typography Hierarchy */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-primary);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.025em;
}

h1 {
  font-size: clamp(2.5rem, 5vw + 1rem, 4.25rem);
  font-weight: 800;
  letter-spacing: -0.035em;
}

h2 {
  font-size: clamp(1.85rem, 3vw + 0.5rem, 2.75rem);
  letter-spacing: -0.03em;
}

h3 {
  font-size: clamp(1.35rem, 2vw + 0.2rem, 1.75rem);
  letter-spacing: -0.02em;
}

h4 {
  font-size: 1.15rem;
  letter-spacing: -0.015em;
}

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

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

a:hover {
  color: #ffffff;
}

code, pre, kbd, samp {
  font-family: var(--font-mono);
  font-size: 0.9em;
}

/* Container Utility */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

.container-wide {
  width: 100%;
  max-width: var(--container-wide);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

/* Section Wrapper */
.section {
  padding: 6rem 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 3.5rem auto;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-light);
  background: var(--accent-soft);
  border: 1px solid var(--border-medium);
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-pill);
  margin-bottom: 1.25rem;
}

.section-tag svg {
  width: 14px;
  height: 14px;
  fill: currentColor;
}

.section-title {
  margin-bottom: 1.25rem;
}

.section-description {
  font-size: 1.15rem;
  color: var(--text-tertiary);
}

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

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

::-webkit-scrollbar-thumb {
  background: var(--bg-surface-elevated);
  border: 2px solid var(--bg-canvas);
  border-radius: var(--radius-pill);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--accent-secondary);
}