/* ========================================
   CSS Variables - Heartclip Editorial Ink
   ======================================== */
:root {
  --c-bg: #FBF7F4;
  --c-surface: #FFFFFF;
  --c-text: #1B1B1F;
  --c-muted: #5A5A66;
  --c-border: #E6D9D2;
  --c-primary: #B21F3A;
  --c-secondary: #2B2D42;
  --c-accent: #F2A541;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(27, 27, 31, 0.10);
  --maxw: 1120px;
  --space: clamp(14px, 1.8vw, 22px);
  --font-serif: Georgia, 'Times New Roman', Times, serif;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Helvetica Neue', sans-serif;
}

/* ========================================
   Base & Reset
   ======================================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 100%;
  -webkit-text-size-adjust: 100%;
  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);
  font-size: 1.0625rem;
  line-height: 1.7;
  color: var(--c-text);
  background-color: var(--c-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ========================================
   Typography
   ======================================== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  font-weight: 700;
  line-height: 1.3;
  color: var(--c-secondary);
  margin-bottom: 0.75em;
}

h1 {
  font-size: clamp(1.875rem, 4vw, 2.75rem);
  margin-bottom: 1rem;
}

h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin-top: 2rem;
}

h3 {
  font-size: clamp(1.25rem, 2.5vw, 1.5rem);
  margin-top: 1.5rem;
}

p {
  margin-bottom: 1.25rem;
}

a {
  color: var(--c-primary);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
  transition: text-decoration-thickness 0.2s ease, color 0.2s ease;
}

a:hover,
a:focus {
  color: var(--c-secondary);
  text-decoration-thickness: 2px;
}

a:focus-visible {
  outline: 3px solid var(--c-primary);
  outline-offset: 3px;
  border-radius: 2px;
}

ul, ol {
  margin-bottom: 1.25rem;
  padding-left: 1.5rem;
}

li {
  margin-bottom: 0.5rem;
}

strong {
  font-weight: 700;
  color: var(--c-secondary);
}

/* ========================================
   Layout - Grid & Container
   ======================================== */
.container {
  max-width: var(--maxw);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space);
  padding-right: var(--space);
}

/* ========================================
   Header
   ======================================== */
.site-header {
  background-color: var(--c-surface);
  border-bottom: 1px solid var(--c-border);
  padding: calc(var(--space) * 1.2) 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow);
}

.site-header .container {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.site-branding .site-name {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--c-primary);
  text-decoration: none;
  transition: color 0.2s ease;
}

.site-branding .site-name:hover,
.site-branding .site-name:focus {
  color: var(--c-secondary);
}

.main-nav ul {
  list-style: none;
  display: flex;
  gap: 1.5rem;
  margin: 0;
  padding: 0;
}

.main-nav a {
  font-weight: 600;
  text-decoration: none;
  color: var(--c-text);
  transition: color 0.2s ease;
}

.main-nav a:hover,
.main-nav a:focus {
  color: var(--c-primary);
}

/* ========================================
   Main Content
   ======================================== */
main {
  padding: calc(var(--space) * 2.5) 0;
  min-height: 60vh;
}

.page-content {
  background-color: var(--c-surface);
  border-radius: var(--radius);
  padding: calc(var(--space) * 2);
  box-shadow: var(--shadow);
}

.page-header {
  margin-bottom: calc(var(--space) * 2);
  padding-bottom: calc(var(--space) * 1.5);
  border-bottom: 2px solid var(--c-border);
}

.content-section {
  margin-bottom: calc(var(--space) * 2.5);
}

.subsection {
  margin-top: calc(var(--space) * 1.5);
  padding-left: calc(var(--space) * 1);
  border-left: 3px solid var(--c-accent);
}

/* ========================================
   Breadcrumbs
   ======================================== */
.breadcrumbs {
  margin-bottom: calc(var(--space) * 1.5);
  font-size: 0.9375rem;
}

.breadcrumbs ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0;
  margin: 0;
}

.breadcrumbs li {
  margin: 0;
}

.breadcrumbs li:not(:last-child)::after {
  content: '/';
  margin-left: 0.5rem;
  color: var(--c-muted);
}

.breadcrumbs a {
  color: var(--c-primary);
  text-decoration: none;
}

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

.breadcrumbs [aria-current="page"] {
  color: var(--c-muted);
  font-weight: 600;
}

/* ========================================
   Tables
   ======================================== */
.table-container {
  overflow-x: auto;
  margin: calc(var(--space) * 1.5) 0;
  border-radius: var(--radius);
  box-shadow: 0 2px 8px rgba(27, 27, 31, 0.08);
}

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

caption {
  font-family: var(--font-serif);
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--c-secondary);
  text-align: left;
  padding: calc(var(--space) * 0.75) var(--space);
  background-color: var(--c-bg);
  border-bottom: 2px solid var(--c-border);
}

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

thead th {
  padding: calc(var(--space) * 0.75) var(--space);
  text-align: left;
  font-weight: 700;
  border-bottom: 2px solid var(--c-primary);
}

tbody tr {
  border-bottom: 1px solid var(--c-border);
}

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

tbody tr:hover {
  background-color: rgba(178, 31, 58, 0.05);
}

tbody td {
  padding: calc(var(--space) * 0.75) var(--space);
  vertical-align: top;
}

@media (min-width: 768px) {
  thead {
    position: sticky;
    top: 0;
    z-index: 10;
  }
}

/* ========================================
   Details / Summary (Accordion)
   ======================================== */
details {
  background-color: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: calc(var(--space) * 0.75);
  margin-bottom: 1rem;
  transition: box-shadow 0.2s ease;
}

details:hover {
  box-shadow: 0 4px 12px rgba(27, 27, 31, 0.08);
}

details[open] {
  border-color: var(--c-primary);
}

summary {
  font-family: var(--font-serif);
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--c-secondary);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: calc(var(--space) * 0.5);
  transition: color 0.2s ease;
}

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

summary::before {
  content: '▸';
  display: inline-block;
  font-size: 1.25rem;
  color: var(--c-primary);
  transition: transform 0.3s ease;
}

details[open] summary::before {
  transform: rotate(90deg);
}

summary:hover,
summary:focus {
  color: var(--c-primary);
}

summary:focus-visible {
  outline: 3px solid var(--c-primary);
  outline-offset: 3px;
  border-radius: var(--radius);
}

.details-content {
  padding: calc(var(--space) * 0.75) calc(var(--space) * 0.5) 0;
  color: var(--c-text);
}

.details-content p:last-child {
  margin-bottom: 0;
}

/* ========================================
   Aside / Accessibility Note
   ======================================== */
aside {
  background-color: var(--c-bg);
  border-left: 4px solid var(--c-accent);
  padding: calc(var(--space) * 1.25);
  margin: calc(var(--space) * 2) 0;
  border-radius: var(--radius);
}

aside h3 {
  margin-top: 0;
  color: var(--c-secondary);
}

/* ========================================
   Resource List
   ======================================== */
.resource-list {
  list-style: none;
  padding: 0;
}

.resource-list li {
  margin-bottom: 1rem;
  padding-left: 1.5rem;
  position: relative;
}

.resource-list li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--c-primary);
  font-weight: 700;
}

/* ========================================
   Footer
   ======================================== */
.site-footer {
  background-color: var(--c-secondary);
  color: var(--c-surface);
  padding: calc(var(--space) * 1.5) 0;
  text-align: center;
  margin-top: calc(var(--space) * 3);
}

.site-footer p {
  margin: 0;
  font-size: 0.9375rem;
}

/* ========================================
   Responsive Breakpoints
   ======================================== */
@media (max-width: 767px) {
  .site-header .container {
    flex-direction: column;
    align-items: flex-start;
  }

  .main-nav ul {
    flex-direction: column;
    gap: 0.75rem;
  }

  .page-content {
    padding: calc(var(--space) * 1.25);
  }

  table {
    font-size: 0.875rem;
  }

  thead th,
  tbody td {
    padding: calc(var(--space) * 0.5);
  }
}

@media (min-width: 768px) and (max-width: 1023px) {
  .container {
    padding-left: calc(var(--space) * 1.5);
    padding-right: calc(var(--space) * 1.5);
  }
}

@media (min-width: 1024px) {
  body {
    font-size: 1.125rem;
  }

  .page-content {
    padding: calc(var(--space) * 3);
  }
}

/* ========================================
   Focus Visible (Accessibility)
   ======================================== */
*:focus-visible {
  outline: 3px solid var(--c-primary);
  outline-offset: 3px;
}

button:focus-visible,
a:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--c-primary);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ========================================
   Reduced Motion
   ======================================== */
@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
  }
}