/* CSS Variables - Couture Petal Ledger Palette */
:root {
  --color-primary: #6B4EFF;
  --color-secondary: #FF4E8A;
  --color-accent: #2ED3B7;
  --color-bg: #FBFAFF;
  --color-surface: #FFFFFF;
  --color-text: #1E1B2E;
  --color-muted: #5A5670;
  --color-border: #E6E2F2;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(30, 27, 46, 0.10);
  --maxw: 1120px;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2.5rem;
  --spacing-xl: 4rem;
}

/* Reset and Base Styles */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

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

body {
  font-family: var(--font-sans);
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Typography - Mobile First */
h1, h2, h3, h4, h5, h6 {
  line-height: 1.2;
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  color: var(--color-text);
}

h1 {
  font-size: 1.875rem;
  margin-bottom: var(--spacing-md);
}

h2 {
  font-size: 1.5rem;
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-sm);
}

h3 {
  font-size: 1.25rem;
  margin-top: var(--spacing-md);
}

@media (min-width: 768px) {
  h1 {
    font-size: 2.5rem;
  }
  h2 {
    font-size: 1.875rem;
  }
  h3 {
    font-size: 1.5rem;
  }
}

@media (min-width: 1024px) {
  h1 {
    font-size: 3rem;
  }
  h2 {
    font-size: 2.25rem;
  }
}

p {
  margin-bottom: var(--spacing-sm);
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.2s ease, text-decoration 0.2s ease;
}

a:hover {
  color: var(--color-secondary);
  text-decoration: underline;
}

a:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: 3px;
}

/* Container and Layout */
.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--spacing-sm);
}

@media (min-width: 768px) {
  .container {
    padding: 0 var(--spacing-md);
  }
}

/* Header and Navigation */
header {
  background-color: var(--color-surface);
  border-bottom: 2px solid var(--color-border);
  padding: var(--spacing-md) 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow);
}

header .container {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  align-items: center;
}

@media (min-width: 768px) {
  header .container {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

.site-name {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
}

nav ul {
  list-style: none;
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  justify-content: center;
}

nav a {
  font-weight: 600;
  color: var(--color-text);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius);
  transition: background-color 0.2s ease, color 0.2s ease;
}

nav a:hover {
  background-color: var(--color-bg);
  color: var(--color-primary);
  text-decoration: none;
}

nav a[aria-current="page"] {
  background-color: var(--color-primary);
  color: var(--color-surface);
}

/* Breadcrumbs */
.breadcrumbs {
  margin: var(--spacing-md) 0;
}

.breadcrumbs ol {
  list-style: none;
  display: flex;
  gap: var(--spacing-xs);
  flex-wrap: wrap;
  font-size: 0.875rem;
  color: var(--color-muted);
}

.breadcrumbs li:not(:last-child)::after {
  content: '>';
  margin-left: var(--spacing-xs);
  color: var(--color-muted);
}

.breadcrumbs a {
  color: var(--color-primary);
}

.breadcrumbs a:hover {
  text-decoration: underline;
}

/* Main Content */
main {
  padding: var(--spacing-lg) 0;
  min-height: 60vh;
}

section, article {
  margin-bottom: var(--spacing-lg);
}

article section {
  margin-bottom: var(--spacing-md);
}

/* Blockquote - Editorial Pull-Quote Styling */
blockquote {
  margin: var(--spacing-lg) 0;
  padding: var(--spacing-md) var(--spacing-md) var(--spacing-md) var(--spacing-lg);
  background: linear-gradient(135deg, rgba(107, 78, 255, 0.05), rgba(255, 78, 138, 0.05));
  border-left: 5px solid var(--color-accent);
  border-radius: var(--radius);
  font-size: 1.125rem;
  font-style: italic;
  color: var(--color-text);
  box-shadow: var(--shadow);
}

blockquote p {
  margin-bottom: 0;
}

@media (min-width: 768px) {
  blockquote {
    font-size: 1.25rem;
    padding: var(--spacing-lg);
  }
}

/* Aside */
aside {
  background-color: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--spacing-md);
  margin: var(--spacing-lg) 0;
  box-shadow: var(--shadow);
}

aside h3 {
  margin-top: 0;
  color: var(--color-primary);
  font-size: 1.125rem;
}

aside ul {
  margin-left: var(--spacing-md);
  margin-bottom: 0;
}

aside li {
  margin-bottom: var(--spacing-xs);
}

/* Tables - Responsive with Zebra Striping */
.table-container {
  overflow-x: auto;
  margin: var(--spacing-md) 0;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

table {
  width: 100%;
  border-collapse: collapse;
  background-color: var(--color-surface);
  font-size: 0.9375rem;
}

caption {
  caption-side: top;
  padding: var(--spacing-sm);
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--color-text);
  text-align: left;
  background-color: var(--color-bg);
  border-radius: var(--radius) var(--radius) 0 0;
}

thead {
  background-color: var(--color-primary);
  color: var(--color-surface);
}

thead th {
  padding: var(--spacing-sm) var(--spacing-sm);
  text-align: left;
  font-weight: 600;
  border-bottom: 2px solid var(--color-border);
}

tbody tr {
  border-bottom: 1px solid var(--color-border);
  transition: background-color 0.2s ease;
}

tbody tr:nth-child(even) {
  background-color: var(--color-bg);
}

tbody tr:hover {
  background-color: rgba(107, 78, 255, 0.08);
}

tbody td {
  padding: var(--spacing-sm);
  vertical-align: top;
}

@media (max-width: 767px) {
  table {
    font-size: 0.875rem;
  }
  thead th, tbody td {
    padding: var(--spacing-xs);
  }
}

/* Details/Summary Accordion */
details {
  background-color: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: var(--radius);
  margin-bottom: var(--spacing-sm);
  overflow: hidden;
  transition: box-shadow 0.2s ease;
}

details:hover {
  box-shadow: var(--shadow);
}

details[open] {
  box-shadow: var(--shadow);
}

summary {
  padding: var(--spacing-sm) var(--spacing-md);
  font-weight: 600;
  font-size: 1.0625rem;
  color: var(--color-primary);
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background-color 0.2s ease, padding 0.2s ease;
  user-select: none;
}

summary::-webkit-details-marker {
  display: none;
}

summary::after {
  content: '+';
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-accent);
  transition: transform 0.2s ease;
}

details[open] summary::after {
  content: '−';
  transform: rotate(0deg);
}

summary:hover {
  background-color: var(--color-bg);
}

summary:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: -3px;
}

details p {
  padding: 0 var(--spacing-md) var(--spacing-md) var(--spacing-md);
  color: var(--color-text);
  line-height: 1.7;
}

@media (prefers-reduced-motion: reduce) {
  summary::after {
    transition: none;
  }
}

/* Internal Link Lists */
.internal-link-list {
  list-style: none;
  margin: var(--spacing-md) 0;
}

.internal-link-list li {
  margin-bottom: var(--spacing-sm);
}

.internal-link-list a {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: var(--color-surface);
  border: 2px solid var(--color-primary);
  border-radius: var(--radius);
  color: var(--color-primary);
  font-weight: 600;
  transition: background-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.internal-link-list a:hover {
  background-color: var(--color-primary);
  color: var(--color-surface);
  text-decoration: none;
  transform: translateY(-2px);
}

.internal-link-list a:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 3px;
}

/* Footer */
footer {
  background-color: var(--color-surface);
  border-top: 2px solid var(--color-border);
  padding: var(--spacing-lg) 0;
  margin-top: var(--spacing-xl);
}

footer .container {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  align-items: center;
  text-align: center;
}

@media (min-width: 768px) {
  footer .container {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

footer p {
  margin: 0;
  color: var(--color-muted);
  font-size: 0.9375rem;
}

footer nav ul {
  list-style: none;
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  justify-content: center;
}

footer nav a {
  color: var(--color-muted);
  font-size: 0.9375rem;
  transition: color 0.2s ease;
}

footer nav a:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

/* Responsive Grid Layout for Wide Screens */
@media (min-width: 1024px) {
  main .container {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }
}

/* Focus Visible Enhancements */
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 3px;
}

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