/* Sikome Lake Editorial Drift Stylesheet */

/* CSS Custom Properties */
:root {
  --color-bg: #F6F3EE;
  --color-surface: #FFFFFF;
  --color-text: #1B1F24;
  --color-muted: #4E5A66;
  --color-border: #D7D0C6;
  --color-primary: #1F5E63;
  --color-secondary: #2E3A59;
  --color-accent: #C86B3C;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(27, 31, 36, 0.10);
  --maxw: 72rem;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2.5rem;
  --spacing-xl: 4rem;
  --font-base: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  --font-serif: Georgia, 'Times New Roman', serif;
  --transition-speed: 0.2s;
}

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

html {
  font-size: 100%;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-base);
  font-size: 1.0625rem;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  line-height: 1.3;
  margin: 0 0 var(--spacing-md) 0;
  color: var(--color-secondary);
  font-weight: 600;
}

h1 {
  font-size: 2.25rem;
  margin-bottom: var(--spacing-lg);
}

h2 {
  font-size: 1.75rem;
  margin-top: var(--spacing-lg);
}

h3 {
  font-size: 1.375rem;
  margin-top: var(--spacing-md);
}

p {
  margin: 0 0 var(--spacing-md) 0;
}

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

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

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

/* Container and Layout Grid */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--spacing-sm);
  padding-right: var(--spacing-sm);
}

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

/* Header and Navigation */
header {
  background-color: var(--color-surface);
  border-bottom: 1px 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);
}

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

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

nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

nav a {
  color: var(--color-text);
  font-weight: 500;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: calc(var(--radius) / 2);
  transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease;
}

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

nav a[aria-current="page"] {
  color: var(--color-primary);
  font-weight: 700;
}

/* Breadcrumb Navigation */
.breadcrumb {
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: var(--spacing-sm) 0;
}

.breadcrumb ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
  font-size: 0.9375rem;
}

.breadcrumb li {
  display: flex;
  align-items: center;
}

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

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

.breadcrumb li[aria-current="page"] {
  color: var(--color-muted);
}

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

article {
  background-color: var(--color-surface);
  border-radius: var(--radius);
  padding: var(--spacing-lg) var(--spacing-md);
  box-shadow: var(--shadow);
}

@media (min-width: 768px) {
  article {
    padding: var(--spacing-xl) var(--spacing-lg);
  }
}

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

section:last-child {
  margin-bottom: 0;
}

/* Aside */
aside {
  background-color: var(--color-bg);
  border-left: 4px solid var(--color-accent);
  padding: var(--spacing-md);
  margin: var(--spacing-lg) 0;
  border-radius: calc(var(--radius) / 2);
}

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

/* Blockquote */
blockquote {
  background-color: var(--color-surface);
  border-left: 4px solid var(--color-accent);
  margin: var(--spacing-lg) 0;
  padding: var(--spacing-md) var(--spacing-md) var(--spacing-md) var(--spacing-lg);
  font-style: italic;
  color: var(--color-secondary);
  border-radius: calc(var(--radius) / 2);
}

blockquote p:last-child {
  margin-bottom: 0;
}

/* Tables */
table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--spacing-lg) 0;
  font-size: 0.9375rem;
  background-color: var(--color-surface);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

@media (max-width: 767px) {
  table {
    display: block;
    overflow-x: auto;
    white-space: nowrap;
  }
}

caption {
  font-family: var(--font-serif);
  font-size: 1.125rem;
  font-weight: 600;
  text-align: left;
  padding: var(--spacing-md);
  background-color: var(--color-primary);
  color: var(--color-surface);
}

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

@media (min-width: 1024px) {
  thead {
    position: sticky;
    top: 0;
  }
}

th {
  text-align: left;
  padding: var(--spacing-sm) var(--spacing-md);
  font-weight: 600;
}

td {
  padding: var(--spacing-sm) var(--spacing-md);
  border-bottom: 1px solid var(--color-border);
}

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

tbody tr:hover {
  background-color: rgba(31, 94, 99, 0.05);
}

/* Details and Summary (Accordions) */
details {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  margin-bottom: var(--spacing-md);
  padding: var(--spacing-md);
  transition: border-color var(--transition-speed) ease;
}

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

summary {
  font-family: var(--font-serif);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-primary);
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: color var(--transition-speed) ease;
}

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

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

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

summary:hover {
  color: var(--color-accent);
}

summary:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: calc(var(--radius) / 2);
}

details div {
  margin-top: var(--spacing-md);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--color-border);
  color: var(--color-text);
}

/* Footer */
footer {
  background-color: var(--color-secondary);
  color: var(--color-surface);
  padding: var(--spacing-lg) 0;
  margin-top: var(--spacing-xl);
  text-align: center;
  font-size: 0.9375rem;
}

footer p {
  margin: 0;
}

/* Focus Visible Styles */
*:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 3px;
}

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

/* Responsive Typography */
@media (min-width: 768px) {
  body {
    font-size: 1.125rem;
  }
  h1 {
    font-size: 2.75rem;
  }
  h2 {
    font-size: 2rem;
  }
  h3 {
    font-size: 1.5rem;
  }
}

@media (min-width: 1024px) {
  h1 {
    font-size: 3.25rem;
  }
  h2 {
    font-size: 2.25rem;
  }
}

/* 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;
}