/* ==========================================================================
   DEVIUM — BASE STYLES & RESET
   Semantics, Fluid Typography, Accessibility & Layout Primitives
   ========================================================================== */

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

html {
  font-family: var(--font-primary);
  font-size: 16px;
  line-height: var(--lh-normal);
  color: var(--text-primary);
  background-color: var(--bg-body);
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  max-width: 100%;
  scroll-padding-top: var(--header-height);
}

html.theme-transitioning,
html.theme-transitioning *,
html.theme-transitioning *::before,
html.theme-transitioning *::after {
  transition: background-color var(--duration-normal) var(--ease-in-out-smooth),
              border-color var(--duration-normal) var(--ease-in-out-smooth),
              color var(--duration-normal) var(--ease-in-out-smooth) !important;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  max-width: 100%;
  position: relative;
  padding-top: var(--header-height);
}

#main-content {
  overflow-x: clip;
  max-width: 100%;
}

/* Skip Link for Accessibility */
.skip-link {
  position: absolute;
  top: -100px;
  left: var(--space-4);
  background: var(--bg-surface-raised);
  color: var(--text-primary);
  padding: var(--space-3) var(--space-5);
  z-index: 1000;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-medium);
  font-weight: var(--fw-medium);
  font-size: var(--text-sm);
  transition: top var(--duration-fast) ease;
}

.skip-link:focus {
  top: var(--space-4);
  outline: 2px solid var(--brand-violet);
  outline-offset: 2px;
}

/* Focus Visible Management */
:focus-visible {
  outline: 2px solid var(--brand-violet);
  outline-offset: 3px;
  border-radius: var(--radius-xs);
}

/* Text Selection */
::selection {
  background-color: rgba(108, 92, 231, 0.35);
  color: var(--text-primary);
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--border-medium);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--border-strong);
}

/* Headings & Editorial Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-primary);
  font-weight: var(--fw-bold);
  line-height: var(--lh-tight);
  color: var(--text-primary);
  letter-spacing: var(--tracking-tight);
}

h1 {
  font-size: var(--text-5xl);
  letter-spacing: var(--tracking-tighter);
}

h2 {
  font-size: var(--text-3xl);
  letter-spacing: var(--tracking-tight);
}

h3 {
  font-size: var(--text-2xl);
}

h4 {
  font-size: var(--text-xl);
}

h5 {
  font-size: var(--text-lg);
}

h6 {
  font-size: var(--text-base);
}

p {
  color: var(--text-secondary);
  font-size: var(--text-base);
  line-height: var(--lh-relaxed);
}

p.lead {
  font-size: var(--text-lg);
  line-height: var(--lh-relaxed);
  color: var(--text-secondary);
  font-weight: var(--fw-regular);
}

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

img, svg, picture, video {
  max-width: 100%;
  display: block;
  height: auto;
}

button, input, select, textarea {
  font: inherit;
  color: inherit;
  background: transparent;
  border: none;
}

button {
  cursor: pointer;
}

ul, ol {
  list-style: none;
}

/* Utility Layout Containers */
.container {
  width: 100%;
  max-width: var(--container-xl);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-6);
  padding-right: var(--space-6);
}

.container-sm {
  max-width: var(--container-sm);
}

.container-md {
  max-width: var(--container-md);
}

.container-lg {
  max-width: var(--container-lg);
}

.container-2xl {
  max-width: var(--container-2xl);
}

.section {
  padding-top: var(--space-20);
  padding-bottom: var(--space-20);
  position: relative;
}

.section-lg {
  padding-top: var(--space-24);
  padding-bottom: var(--space-24);
}

.section-sm {
  padding-top: var(--space-12);
  padding-bottom: var(--space-12);
}

/* Section Headers */
.section-header {
  margin-bottom: var(--space-12);
  max-width: 720px;
}

.section-header.center,
.section-header.text-center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

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

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

.heading-lg {
  font-family: var(--font-primary);
  font-size: clamp(var(--text-2xl), 3vw, var(--text-4xl));
  line-height: var(--lh-tight);
  letter-spacing: var(--tracking-tight);
  color: var(--text-primary);
  font-weight: var(--fw-bold);
}

.heading-sm {
  font-family: var(--font-primary);
  font-size: var(--text-lg);
  line-height: var(--lh-snug);
  color: var(--text-primary);
  font-weight: var(--fw-bold);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: var(--space-4);
}

.eyebrow::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: var(--radius-full);
  background: var(--brand-violet);
}

.section-title {
  margin-bottom: var(--space-4);
}

.section-subtitle {
  font-size: var(--text-lg);
  color: var(--text-secondary);
}

/* Editorial Brand Elements */
.text-gradient {
  background: var(--brand-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.text-gradient-subtle {
  background: linear-gradient(180deg, var(--text-primary) 0%, var(--text-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.accent-rule {
  width: 48px;
  height: 2px;
  background: var(--brand-gradient);
  border: none;
  margin: var(--space-4) 0;
}

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

/* Responsive Grid Primitives */
.grid,
.grid-2,
.grid-3,
.grid-4,
.grid-auto-fit {
  display: grid;
  gap: var(--space-6);
}

.grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

.grid-auto-fit {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.flex {
  display: flex;
}

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

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

.flex-col {
  display: flex;
  flex-direction: column;
}

/* Responsive Media Queries */
@media (max-width: 1024px) {
  .section {
    padding-top: var(--space-16);
    padding-bottom: var(--space-16);
  }
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .container {
    padding-left: var(--space-4);
    padding-right: var(--space-4);
  }
  .section {
    padding-top: var(--space-10) !important;
    padding-bottom: var(--space-10) !important;
  }
  .section-header {
    margin-bottom: var(--space-8);
  }
  .heading-lg,
  .heading-1,
  .section-title,
  .hero-title,
  h2 {
    font-size: clamp(1.85rem, 7vw, 2.35rem) !important;
    line-height: 1.15 !important;
    letter-spacing: -0.02em !important;
    margin-bottom: var(--space-3) !important;
  }
  .section-subtitle {
    font-size: var(--text-base);
    margin-bottom: var(--space-3);
  }
  .grid-2, .grid-3, .grid-4 {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .heading-lg,
  .heading-1,
  .section-title,
  .hero-title,
  h2 {
    font-size: clamp(1.65rem, 7.5vw, 2rem) !important;
    line-height: 1.18 !important;
  }
}

/* Prefers Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}