:root {

  --font-display: 'Fraunces', Georgia, serif;
  --font-body: 'DM Sans', 'Segoe UI', sans-serif;

 
  --clr-bg: #faf6f0;
  --clr-surface: #ffffff;
  --clr-surface-alt: #f3ede4;
  --clr-border: #e0d6c8;
  --clr-border-focus: #6b7f3b;

  --clr-text: #2c2417;
  --clr-text-secondary: #6b6054;
  --clr-text-muted: #9a9087;

  --clr-primary: #4a6a2e;
  --clr-primary-hover: #3d5826;
  --clr-primary-light: #e8f0da;
  --clr-accent: #c17f39;
  --clr-accent-light: #fdf0e0;

  --clr-danger: #b8433a;
  --clr-danger-light: #fce8e6;
  --clr-success: #3a8a5c;
  --clr-success-light: #e4f5ec;
  --clr-warning: #c49a2e;
  --clr-warning-light: #fef9e7;

  --clr-mark: #fde68a;

 
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;


  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;


  --shadow-sm: 0 1px 3px rgba(44, 36, 23, 0.06);
  --shadow-md: 0 4px 12px rgba(44, 36, 23, 0.08);
  --shadow-lg: 0 8px 30px rgba(44, 36, 23, 0.10);

 
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --transition-fast: 150ms var(--ease-out);
  --transition-base: 250ms var(--ease-out);
}


[data-theme="dark"] {
  --clr-bg: #1a1612;
  --clr-surface: #252019;
  --clr-surface-alt: #2e2820;
  --clr-border: #3d362b;
  --clr-border-focus: #8fa85a;

  --clr-text: #ede6db;
  --clr-text-secondary: #b0a898;
  --clr-text-muted: #7d7568;

  --clr-primary: #8fa85a;
  --clr-primary-hover: #a3bc6e;
  --clr-primary-light: #2a3018;
  --clr-accent: #d4983e;
  --clr-accent-light: #332510;

  --clr-danger: #e05d53;
  --clr-danger-light: #351813;
  --clr-success: #5bb87a;
  --clr-success-light: #17291d;
  --clr-warning: #ddb64a;
  --clr-warning-light: #2b2410;

  --clr-mark: #5c4b0f;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.25);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.3);
}


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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--clr-text);
  background-color: var(--clr-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background-color var(--transition-base), color var(--transition-base);
}


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


.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-md);
  background: var(--clr-primary);
  color: #fff;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-sm);
  z-index: 1000;
  font-weight: 600;
  text-decoration: none;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: var(--space-sm);
}


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


:focus:not(:focus-visible) {
  outline: none;
}


a {
  color: var(--clr-primary);
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--clr-primary-hover);
}


h1, h2, h3, h4 {
  font-family: var(--font-display);
  line-height: 1.25;
  color: var(--clr-text);
}

h2 { font-size: 1.75rem; font-weight: 700; }
h3 { font-size: 1.25rem; font-weight: 600; }

code, kbd {
  font-family: 'Courier New', monospace;
  font-size: 0.875em;
  background: var(--clr-surface-alt);
  padding: 0.15em 0.4em;
  border-radius: var(--radius-sm);
  border: 1px solid var(--clr-border);
}

kbd {
  font-size: 0.8em;
  box-shadow: 0 1px 2px rgba(44, 36, 23, 0.1);
}

mark {
  background-color: var(--clr-mark);
  color: inherit;
  padding: 0.05em 0.15em;
  border-radius: 2px;
}

.site-header {
  background: var(--clr-surface);
  border-bottom: 1px solid var(--clr-border);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-sm) var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
}

.logo-group {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.logo-icon {
  font-size: 1.5rem;
  color: var(--clr-accent);
}

.logo-text {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.logo-accent {
  color: var(--clr-primary);
}

.nav-list {
  display: flex;
  list-style: none;
  gap: var(--space-xs);
}

.nav-link {
  display: inline-block;
  padding: var(--space-sm) var(--space-md);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--clr-text-secondary);
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast), color var(--transition-fast);
}

.nav-link:hover {
  background: var(--clr-surface-alt);
  color: var(--clr-text);
}

.nav-link.active {
  background: var(--clr-primary-light);
  color: var(--clr-primary);
  font-weight: 600;
}


.theme-toggle-btn {
  background: var(--clr-surface-alt);
  border: 1px solid var(--clr-border);
  border-radius: 50%;
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.1rem;
  transition: background var(--transition-fast);
  flex-shrink: 0;
}

.theme-toggle-btn:hover {
  background: var(--clr-border);
}

.theme-icon-dark { display: none; }
[data-theme="dark"] .theme-icon-light { display: none; }
[data-theme="dark"] .theme-icon-dark { display: inline; }


.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
}

.hamburger-line {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--clr-text);
  border-radius: 2px;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.mobile-menu-btn[aria-expanded="true"] .hamburger-line:nth-child(1) {
  transform: rotate(45deg) translate(4px, 4px);
}
.mobile-menu-btn[aria-expanded="true"] .hamburger-line:nth-child(2) {
  opacity: 0;
}
.mobile-menu-btn[aria-expanded="true"] .hamburger-line:nth-child(3) {
  transform: rotate(-45deg) translate(4px, -4px);
}


.mobile-drawer {
  display: none;
  background: var(--clr-surface);
  border-top: 1px solid var(--clr-border);
  padding: var(--space-md) var(--space-lg);
}

.mobile-drawer[aria-hidden="false"] {
  display: block;
  animation: slideDown 250ms var(--ease-out);
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

.mobile-nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.mobile-nav-link {
  display: block;
  padding: var(--space-sm) var(--space-md);
  text-decoration: none;
  color: var(--clr-text-secondary);
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast);
}

.mobile-nav-link:hover,
.mobile-nav-link.active {
  background: var(--clr-primary-light);
  color: var(--clr-primary);
}

.main-wrapper {
  flex: 1;
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-xl) var(--space-lg);
  width: 100%;
}


.page-section {
  display: none;
  animation: fadeIn 300ms var(--ease-out);
}

.page-section.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.section-header {
  margin-bottom: var(--space-xl);
}

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

.section-subtitle {
  color: var(--clr-text-muted);
  font-size: 0.95rem;
}


.site-footer {
  text-align: center;
  padding: var(--space-lg);
  color: var(--clr-text-muted);
  font-size: 0.85rem;
  border-top: 1px solid var(--clr-border);
  background: var(--clr-surface);
}


.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(44, 36, 23, 0.5);
  z-index: 200;
  align-items: center;
  justify-content: center;
  padding: var(--space-lg);
}

.modal-overlay[aria-hidden="false"] {
  display: flex;
  animation: fadeIn 200ms var(--ease-out);
}

[data-theme="dark"] .modal-overlay {
  background: rgba(0, 0, 0, 0.6);
}

.modal-box {
  background: var(--clr-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  max-width: 400px;
  width: 100%;
  box-shadow: var(--shadow-lg);
}

.modal-box h3 {
  margin-bottom: var(--space-sm);
}

.modal-box p {
  color: var(--clr-text-secondary);
  margin-bottom: var(--space-lg);
}

.modal-actions {
  display: flex;
  gap: var(--space-sm);
  justify-content: flex-end;
}