:root{
  --bg: #0e0f14;
  --surface: #141622;
  --surface-2: #0f111a;
  --text: #e8e8ef;
  --muted: #a5a7b5;

  /* LIGHT-mode blue accents */
  --accent-400: #60a5fa;
  --accent-500: #3b82f6;
  --accent-600: #2563eb;

  --ring: rgba(37, 99, 235, 0.45);
  --card: rgba(255,255,255,0.06);
  --blur: 14px;
  --radius: 16px;
  --radius-lg: 24px;
  --shadow-1: 0 10px 30px rgba(0,0,0,0.25);
  --shadow-2: 0 8px 18px rgba(0,0,0,0.35);
  --gap: clamp(16px, 3vw, 28px);
}

/* Light scheme */
@media (prefers-color-scheme: light) {
  :root {
    --bg: #f7f7fb;
    --surface: #ffffff;
    --surface-2: #f2f3f8;
    --text: #16171d;
    --muted: #5a5d72;
    --card: rgba(0,0,0,0.05);
    --shadow-1: 0 10px 30px rgba(28,28,33,0.10);
    --shadow-2: 0 8px 18px rgba(28,28,33,0.10);
  }
}

/* ===== Enlightenment Popup ===== */
.enlightenment-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.enlightenment-overlay.show {
  opacity: 1;
  visibility: visible;
}

.enlightenment-popup {
  background: var(--surface);
  border: 1px solid var(--card);
  border-radius: var(--radius-lg);
  padding: 2rem;
  max-width: 480px;
  width: 90vw;
  position: relative;
  box-shadow: var(--shadow-2);
  transform: scale(0.8) translateY(20px);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.enlightenment-overlay.show .enlightenment-popup {
  transform: scale(1) translateY(0);
}

.enlightenment-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: none;
  border: none;
  color: var(--muted);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.25rem;
  border-radius: 50%;
  width: 2rem;
  height: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

.enlightenment-close:hover {
  color: var(--text);
  background: var(--card);
}

.enlightenment-title {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--accent-500);
  margin: 0 0 1rem 0;
  background: linear-gradient(135deg, var(--accent-400), var(--accent-600));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.enlightenment-content {
  color: var(--text);
  line-height: 1.6;
  margin-bottom: 2rem;
  font-size: 0.95rem;
}

.enlightenment-actions {
  display: flex;
  justify-content: flex-end;
}

.enlightenment-affirm {
  background: linear-gradient(135deg, var(--accent-500), var(--accent-600));
  color: white;
  border: none;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.enlightenment-affirm:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.2);
}

.enlightenment-affirm:active {
  transform: translateY(0);
}

/* Manual DARK override + gold accent for readability */
:root[data-theme="dark"]{
  --bg: #0c0d12;
  --surface: #131521;
  --surface-2: #0e0f17;
  --text: #e9e9ef;
  --muted: #a9abb8;

  --accent-400: #fbbf24;  /* amber-400 */
  --accent-500: #f59e0b;  /* amber-500 */
  --accent-600: #d97706;  /* amber-600 */

  --ring: rgba(245, 158, 11, 0.45);
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Helvetica Neue, Arial, Noto Sans, "Apple Color Emoji","Segoe UI Emoji";
  color: var(--text);
  background: radial-gradient(1200px 800px at 10% -10%, color-mix(in oklab, var(--accent-600) 35%, transparent), transparent),
              radial-gradient(1000px 600px at 110% 0%, color-mix(in oklab, var(--accent-400) 28%, transparent), transparent),
              var(--bg);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Reusable site container with invisible spacing from window edges */
.container {
  width: min(1100px, 92%);
  margin-inline: auto;
  padding: 0 20px; /* invisible side spacing */
}

/* Header container extends to edges */
.site-header .container {
  width: 100%;
  padding: 0 24px; /* edge spacing for header */
}

.section { padding: clamp(56px, 7vw, 96px) 0; }
.section--alt {
  background: var(--surface-2);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.04);
}

h1, h2, h3 { line-height: 1.1; letter-spacing: -0.02em; }
h1 { font-size: clamp(28px, 5vw, 44px); }
h2 { font-size: clamp(22px, 3.5vw, 30px); margin-bottom: 12px; }
h3 { font-size: clamp(18px, 2.5vw, 22px); }
p { color: var(--muted); }

/* ===== Header (mirrors footer: left = brand+links, right = theme) ===== */
.site-header {
  position: sticky; top: 0; z-index: 100;
  backdrop-filter: blur(var(--blur));
  background: color-mix(in oklab, var(--surface) 60%, transparent);
  border-bottom: 1px solid color-mix(in oklab, var(--text) 12%, transparent);
}

/* Two-column grid: [left content] [theme button] */
.header__inner{
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
}

.header__left{
  display: flex;
  align-items: center;
  gap: 20px;   /* space between logo and nav links */
  min-width: 0;
}

/* Brand */
.site-header .brand {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 10px 0; text-decoration: none; color: inherit;
}
.brand__logo { width: 28px; height: 28px; flex: 0 0 28px; }
.brand__text { font-weight: 700; letter-spacing: -0.02em; }

/* Nav next to brand */
.nav { display: flex; align-items: center; gap: 8px; }
.nav__list {
  list-style: none; display: flex; gap: 10px;
  margin: 0; padding: 0;
}
.nav__list a, .nav__list button {
  appearance: none; border: 0; background: none; color: inherit;
  padding: 8px 12px; border-radius: 999px; text-decoration: none; font-weight: 500;
}
.nav__list a:hover { background: var(--card); }
.nav__toggle { display: none; }

/* Header controls container */
.header__controls {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Square theme and language toggles on far right (outside nav) */
.theme-toggle,
.language-toggle {
  width: 36px; height: 36px;
  display: inline-grid; place-items: center;
  border: 1px solid color-mix(in oklab, var(--text) 14%, transparent);
  border-radius: var(--radius);
  background: var(--surface-1);
  cursor: pointer;
  box-shadow: var(--shadow-1);
  color: var(--text);
}

.flag-icon {
  border-radius: 2px;
  object-fit: cover;
}
.theme-toggle svg { 
  display: none;
  color: inherit;
}
.theme-toggle svg path,
.theme-toggle svg circle {
  stroke: currentColor;
}
:root:not([data-theme="dark"]) .theme-toggle .icon-sun { display: block; }
:root[data-theme="dark"] .theme-toggle .icon-moon { display: block; }

/* Mobile header behavior */
@media (max-width: 820px) {
  .header__left {
    flex: 1;
  }
  .nav__toggle {
    display: inline-flex; margin-left: auto; padding: 10px;
    border-radius: 10px; background: var(--card);
    border: 1px solid color-mix(in oklab, var(--text) 10%, transparent);
  }
  .nav__list {
    position: fixed; inset: 64px 16px auto 16px; flex-direction: column;
    background: var(--surface);
    border: 1px solid color-mix(in oklab, var(--text) 10%, transparent);
    border-radius: var(--radius-lg); box-shadow: var(--shadow-2); padding: 12px;
    transform-origin: top right; transform: scale(.98); opacity: 0; pointer-events: none;
  }
  .nav__list[data-open="true"] { transform: scale(1); opacity: 1; pointer-events: auto; }
}

/* ===== Hero ===== */
.hero { position: relative; padding: clamp(48px, 5vw, 72px) 0 clamp(40px, 5vw, 64px); overflow: clip; }
.hero__media .blob {
  position: absolute; width: min(50vw, 520px); height: min(50vw, 520px);
  background: radial-gradient(circle at 30% 30%, var(--accent-600), transparent 60%);
  filter: blur(60px); top: -80px; left: -120px; opacity: .45; border-radius: 999px; animation: float 18s infinite linear;
  pointer-events: none;
}
.hero__media .blob--2 {
  right: -160px; left: auto; top: 20px;
  background: radial-gradient(circle at 70% 70%, var(--accent-400), transparent 65%);
  width: min(55vw, 560px); height: min(55vw, 560px);
  opacity: .35; animation-duration: 22s;
  pointer-events: none;
}
@keyframes float { from { transform: translateY(0); } 50% { transform: translateY(14px); } to { transform: translateY(0); } }

.hero__content { display: grid; grid-template-columns: 1fr; gap: var(--gap); align-items: center; }
.hero__text { text-align: left; }
.hero__text--centered { max-width: 820px; margin: 0; text-align: left; }
.hero__text p { margin: 10px 0 18px; }
.hero__cta { display: flex; gap: 10px; flex-wrap: wrap; }
.hero__cta .btn { position: relative; z-index: 1; }

.accent-gradient { background: linear-gradient(90deg, var(--accent-600), var(--accent-400)); -webkit-background-clip: text; background-clip: text; color: transparent; }

/* ===== Cards ===== */
.card {
  background: color-mix(in oklab, var(--surface) 70%, transparent);
  border: 1px solid color-mix(in oklab, var(--text) 10%, transparent);
  border-radius: var(--radius-lg);
  padding: clamp(16px, 2.5vw, 24px);
  box-shadow: var(--shadow-1);
}
.card--glass { background: color-mix(in oklab, var(--surface) 40%, transparent); backdrop-filter: blur(var(--blur)); }

/* ===== Grid ===== */
.grid { display: grid; gap: var(--gap); grid-template-columns: 1.3fr .9fr; align-items: start; }
@media (max-width: 900px) { .grid { grid-template-columns: 1fr; } }

/* ===== Footer (brand left | centered text | top button right) ===== */
.footer__grid {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: var(--gap);
  align-items: center;
  width: 100%;
  padding: 0 20px; /* same invisible spacing */
}
.footer__grid .brand--footer {
  justify-self: start;
  display: inline-flex; align-items: center; gap: 10px;
  line-height: 1;
}
.footer__grid .copyright { justify-self: center; text-align: center; }
.footer__grid .to-top { justify-self: end; }

/* Pills */
.pillbar { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 16px; }
.pill { background: var(--card); padding: 10px 14px; border-radius: 999px; border: 1px solid color-mix(in oklab, var(--text) 10%, transparent); }

/* Blog System Styles */
.blog-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
  padding: 1rem;
  background: var(--surface-2);
  border-radius: var(--radius);
  border: 1px solid var(--card);
  flex-wrap: wrap;
  gap: 1rem;
}

.blog-controls > div:first-child {
  display: flex;
  gap: 0.5rem;
}

.category-btn {
  background: var(--card);
  color: var(--text);
  border: 1px solid var(--card);
  padding: 0.5rem 1rem;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: inherit;
}

.category-btn.active {
  background: var(--accent-500);
  color: white;
  border-color: var(--accent-500);
}

.category-btn:hover:not(.active) {
  background: var(--surface-3);
}

.page-controls {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.page-btn {
  background: var(--surface-2);
  color: var(--text);
  border: 1px solid var(--card);
  padding: 0.5rem 1rem;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: inherit;
}

.page-btn:hover:not(:disabled) {
  background: var(--accent-500);
  color: white;
  border-color: var(--accent-500);
}

.page-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

#page-info {
  font-weight: 500;
  color: var(--text);
}

.blog-posts {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.blog-post {
  background: var(--surface-2);
  border: 1px solid var(--card);
  border-radius: var(--radius);
  padding: 2rem;
  transition: all 0.2s ease;
  position: relative;
}

.blog-post:hover {
  border-color: var(--accent-500);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

/* Dark mode enhancements for blog posts */
[data-theme="dark"] .blog-post {
  background: color-mix(in oklab, var(--surface-2) 60%, #404040 40%);
  border: 1px solid color-mix(in oklab, var(--card) 150%, #555555);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .blog-post:hover {
  border-color: var(--accent-500);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
  background: color-mix(in oklab, var(--surface-2) 50%, #484848 50%);
}

/* Dark mode blog controls */
[data-theme="dark"] .blog-controls {
  background: color-mix(in oklab, var(--surface-2) 90%, var(--surface-3) 10%);
  border: 1px solid color-mix(in oklab, var(--card) 120%, transparent);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.2);
}

/* Dark mode category buttons */
[data-theme="dark"] .category-btn {
  background: color-mix(in oklab, var(--card) 120%, transparent);
  border: 1px solid color-mix(in oklab, var(--card) 140%, transparent);
}

[data-theme="dark"] .category-btn:hover:not(.active) {
  background: var(--accent-500);
  color: white;
  border-color: var(--accent-500);
}

/* Dark mode page buttons */
[data-theme="dark"] .page-btn {
  background: color-mix(in oklab, var(--surface-2) 120%, transparent);
  border: 1px solid color-mix(in oklab, var(--card) 140%, transparent);
}

[data-theme="dark"] .page-btn:hover:not(:disabled) {
  background: var(--accent-500);
  border-color: var(--accent-500);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

/* Dark mode link buttons */
[data-theme="dark"] .link-button {
  background: color-mix(in oklab, var(--surface-2) 110%, var(--surface-3) 10%);
  border: 1px solid color-mix(in oklab, var(--card) 130%, transparent);
}

[data-theme="dark"] .link-button:hover {
  background: var(--accent-500);
  border-color: var(--accent-500);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
}

/* Dark mode blog post resources section */
[data-theme="dark"] .blog-post-resources {
  border-top: 1px solid color-mix(in oklab, var(--card) 120%, transparent);
}

/* Dark mode cross-references */
[data-theme="dark"] .cross-reference:hover {
  background: color-mix(in oklab, var(--accent-500) 15%, transparent);
}

/* Dark mode loading and no-posts states */
[data-theme="dark"] .loading,
[data-theme="dark"] .no-posts {
  color: color-mix(in oklab, var(--text-muted) 120%, transparent);
}

/* Dark mode popup overlay */
[data-theme="dark"] .not-available-overlay {
  background: rgba(0, 0, 0, 0.7);
}

[data-theme="dark"] .not-available-popup {
  background: color-mix(in oklab, var(--surface-2) 80%, var(--surface-3) 20%);
  border: 1px solid color-mix(in oklab, var(--card) 140%, transparent);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
}

.blog-post-meta {
  color: var(--text-muted);
  font-size: 0.875rem;
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.post-type {
  background: var(--accent-500);
  color: white;
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius);
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.post-type[data-type="archived"] {
  background: var(--text-muted);
  color: var(--surface-1);
}

.cross-reference {
  color: var(--accent-600);
  cursor: pointer;
  text-decoration: underline;
  text-decoration-style: dotted;
  font-weight: 500;
  transition: all 0.2s ease;
}

.cross-reference:hover {
  color: var(--accent-700);
  text-decoration-style: solid;
  background: color-mix(in oklab, var(--accent-500) 10%, transparent);
  padding: 0.1rem 0.25rem;
  border-radius: 0.25rem;
}

.blog-post-title {
  margin: 0 0 1rem 0;
  color: var(--text);
  font-size: 1.5rem;
  font-weight: 600;
}

.blog-post-content {
  color: var(--text);
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

.blog-post-resources {
  border-top: 1px solid var(--card);
  padding-top: 1.5rem;
}

.blog-post-resources h3 {
  margin: 0 0 1rem 0;
  color: var(--text);
  font-size: 1.1rem;
  font-weight: 500;
}

.resource-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.link-button {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  background: var(--surface-2);
  color: var(--text);
  text-decoration: none;
  border: 1px solid var(--card);
  border-radius: var(--radius);
  font-size: 0.875rem;
  font-weight: 500;
  transition: all 0.2s ease;
  cursor: pointer;
  font-family: inherit;
}

.link-button:hover {
  background: var(--accent-500);
  color: white;
  border-color: var(--accent-500);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.link-button.highlighted {
  background: var(--accent-500);
  color: white;
  border-color: var(--accent-500);
  animation: highlight-pulse 2s ease-in-out;
}

button.link-button[data-disabled="true"] .link-text {
  font-style: italic;
}

.asterisk-link {
  color: var(--accent-500);
  cursor: pointer;
  text-decoration: underline;
  text-decoration-style: dotted;
}

.asterisk-link:hover {
  color: var(--accent-600);
  text-decoration-style: solid;
}

.loading {
  text-align: center;
  padding: 3rem;
  color: var(--text-muted);
  font-style: italic;
}

.no-posts {
  text-align: center;
  padding: 3rem;
  color: var(--text-muted);
}

.not-available-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.not-available-overlay.visible {
  opacity: 1;
}

.not-available-popup {
  background: var(--surface-2);
  border: 1px solid var(--card);
  border-radius: var(--radius-lg);
  padding: 2rem;
  max-width: 400px;
  width: 90%;
  position: relative;
  text-align: center;
  transform: scale(0.9);
  transition: transform 0.3s ease;
}

.not-available-overlay.visible .not-available-popup {
  transform: scale(1);
}

.popup-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-muted);
  width: 2rem;
  height: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: all 0.2s ease;
}

.popup-close:hover {
  background: var(--card);
  color: var(--text);
}

@media (max-width: 600px) {
  .blog-controls {
    flex-direction: column;
    text-align: center;
  }
  
  .resource-buttons {
    flex-direction: column;
  }
  
  .link-button {
    justify-content: center;
  }
}

/* Lists & Misc */
.form-actions { display: flex; gap: 10px; flex-wrap: wrap; }
.form-status { min-height: 1em; color: var(--muted); }
.list { padding-left: 18px; }
.projects { display: none; }

.skeleton {
  background: linear-gradient(90deg, rgba(255,255,255,.06), rgba(255,255,255,.12), rgba(255,255,255,.06));
  background-size: 200% 100%;
  animation: shimmer 2s infinite;
}
@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* Buttons */
.btn {
  appearance: none;
  border: 1px solid color-mix(in oklab, var(--text) 12%, transparent);
  background: color-mix(in oklab, var(--surface) 60%, transparent);
  color: var(--text);
  padding: 10px 14px;
  border-radius: 12px;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  box-shadow: var(--shadow-1);
  display: inline-block;
}
.btn:hover { background: color-mix(in oklab, var(--surface) 75%, transparent); }
.btn--ghost {
  background: var(--surface-2);
  border: 1px solid color-mix(in oklab, var(--text) 14%, transparent);
  box-shadow: none;
}
.btn--full { display: inline-flex; width: 100%; justify-content: center; }