:root {
  /* Palette constants */
  --c-oxford: #192338;
  --c-space: #1E2E4F;
  --c-yinmn: #31487A;
  --c-jordy: #8FB3E2;
  --c-lavender: #D9E1F1;

  /* Dark Mode (Default) - Pure Minimalist Text-First */
  --bg-base: #192338;
  --text-main: #D9E1F1;
  --text-muted: #8FB3E2;
  --text-faint: #637da4;
  --accent: #8FB3E2;
  --input-bg: rgba(255, 255, 255, 0.05);
  --input-border: #31487A;
  --code-bg: rgba(0, 0, 0, 0.25);
}

[data-theme="light"] {
  /* Light Mode */
  --bg-base: #D9E1F1;
  --text-main: #192338;
  --text-muted: #31487A;
  --text-faint: #5a74a6;
  --accent: #1E2E4F;
  --input-bg: rgba(0, 0, 0, 0.04);
  --input-border: #8FB3E2;
  --code-bg: rgba(255, 255, 255, 0.6);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  transition: background-color 0.2s ease, color 0.15s ease, border-color 0.2s ease;
}

body {
  background-color: var(--bg-base);
  color: var(--text-main);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-size: 0.95rem;
}

.mono {
  font-family: 'JetBrains Mono', monospace;
}

a {
  color: inherit;
  text-decoration: none;
}

/* Container: Clean, Narrow & Readable */
.container {
  max-width: 680px;
  margin: 0 auto;
  padding: 0 1.25rem;
  width: 100%;
}

/* Minimal Top Navigation */
nav.site-nav {
  padding: 2.25rem 0 1.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.92rem;
}

.nav-left {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex-wrap: wrap;
}

.nav-btn {
  background: none;
  border: none;
  font-family: inherit;
  font-size: inherit;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0.2rem 0;
  position: relative;
  display: inline-block;
  text-decoration: none;
}

.nav-btn:hover {
  color: var(--text-main);
}

.nav-btn.active {
  color: var(--text-main);
  font-weight: 600;
}

.nav-btn.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 1.5px;
  background-color: var(--text-main);
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.icon-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.25rem;
  line-height: 1;
  font-size: 1rem;
}

.icon-btn:hover {
  color: var(--text-main);
}

/* Content Area */
main {
  flex: 1;
  padding-bottom: 4rem;
}

.view-panel {
  animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Hero / Intro (Centered, unboxed) */
.hero-center {
  text-align: center;
  padding: 2.5rem 0 3rem;
}

.avatar-circle {
  width: 150px;
  height: 150px;
  border-radius: 0px;
  object-fit: cover;
  display: block;
  margin: 0 auto 1.5rem;
  border: 1px solid rgba(143, 179, 226, 0.35);
}

.intro-title {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
  letter-spacing: -0.02em;
}

.intro-paragraph {
  font-size: 0.98rem;
  color: var(--text-muted);
  line-height: 1.7;
  max-width: 580px;
  margin: 0 auto;
}

/* Section Headers */
.section-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin: 2.5rem 0 1.25rem;
}

.section-head h2 {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.section-head .see-all {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.section-head .see-all:hover {
  color: var(--text-main);
  text-decoration: underline;
}

/* Minimal Lists: No Cards, No Elevated Surfaces */
.minimal-list {
  display: flex;
  flex-direction: column;
  gap: 1.6rem;
}

.list-item {
  display: block;
}

.list-item-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: 0.3rem;
}

.item-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-main);
  cursor: pointer;
}

.item-title:hover {
  text-decoration: underline;
}

.item-date {
  font-size: 0.82rem;
  color: var(--text-faint);
  white-space: nowrap;
}

.item-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.55;
}

.item-links {
  margin-top: 0.4rem;
  font-size: 0.85rem;
  display: flex;
  gap: 1rem;
}

.item-links a {
  color: var(--text-muted);
}

.item-links a:hover {
  color: var(--text-main);
  text-decoration: underline;
}

/* Search Bar in Subviews (Projects, Blog) */
.view-header-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin: 1.75rem 0 2rem;
  gap: 1rem;
  flex-wrap: wrap;
}

.view-title-wrap {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.view-title {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.search-input {
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  color: var(--text-main);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85rem;
  padding: 0.45rem 0.85rem;
  border-radius: 4px;
  outline: none;
  min-width: 200px;
}

.search-input:focus {
  border-color: var(--text-main);
}

.search-input::placeholder {
  color: var(--text-faint);
}

/* Contact Grid */
.contact-links-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem 2rem;
  margin-top: 1.75rem;
}

.contact-link-item {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.contact-link-item:hover {
  color: var(--text-main);
  text-decoration: underline;
}

.contact-link-item svg {
  width: 18px;
  height: 18px;
  stroke: currentColor;
  fill: none;
  flex-shrink: 0;
}

/* About / Post View Minimal Text Flow */
.prose-text {
  color: var(--text-muted);
  line-height: 1.75;
  font-size: 0.96rem;
}

.prose-text p {
  margin-bottom: 1.25rem;
}

.prose-text h2 {
  color: var(--text-main);
  font-size: 1.3rem;
  font-weight: 600;
  margin: 2rem 0 0.75rem;
}

.prose-text h3 {
  color: var(--text-main);
  font-size: 1.15rem;
  font-weight: 600;
  margin: 1.75rem 0 0.5rem;
}

.prose-text h4 {
  color: var(--text-main);
  font-size: 1.02rem;
  font-weight: 600;
  margin: 1.5rem 0 0.4rem;
}

.prose-text hr {
  border: 0;
  border-top: 1px dashed var(--input-border);
  margin: 2rem 0;
}

.prose-text blockquote {
  border-left: 3px solid var(--c-yinmn);
  padding: 0.25rem 0 0.25rem 1rem;
  margin: 1.25rem 0;
  font-style: italic;
  color: var(--text-muted);
}

.prose-list {
  list-style-type: none;
  padding-left: 0;
  margin-bottom: 1.25rem;
}

.prose-list li {
  margin-bottom: 0.5rem;
  position: relative;
  padding-left: 1.2rem;
}

.prose-list li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--text-faint);
}

.prose-list a,
.prose-text a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.prose-list a:hover,
.prose-text a:hover {
  color: var(--text-main);
}

.cert-link {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent) !important;
  background: var(--input-bg);
  border: 1px solid var(--accent);
  padding: 0.15rem 0.55rem;
  border-radius: 4px;
  text-decoration: none !important;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  vertical-align: middle;
  line-height: 1.3;
  margin-left: 0.25rem;
}

.cert-link:hover {
  background: var(--accent) !important;
  color: var(--bg-base) !important;
  border-color: var(--accent);
  transform: translateY(-1px);
  box-shadow: 0 2px 8px rgba(143, 179, 226, 0.25);
}

[data-theme="light"] .cert-link:hover {
  box-shadow: 0 2px 8px rgba(30, 46, 79, 0.2);
}

.prose-text ul:not(.prose-list),
.prose-text ol {
  margin-bottom: 1.25rem;
  padding-left: 1.5rem;
}

.prose-text ul:not(.prose-list) li,
.prose-text ol li {
  margin-bottom: 0.45rem;
}

/* Code & Syntax Highlighting */
.prose-text code,
code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.86em;
  background: var(--code-bg);
  padding: 0.15rem 0.35rem;
  border-radius: 3px;
  border: 1px solid var(--input-border);
  color: var(--text-main);
}

pre,
div.highlighter-rouge,
figure.highlight {
  margin: 1.4rem 0;
}

pre {
  background: var(--code-bg);
  border: 1px solid var(--input-border);
  border-radius: 4px;
  padding: 1rem 1.15rem;
  overflow-x: auto;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85rem;
  line-height: 1.55;
  color: var(--text-main);
}

pre code {
  background: transparent !important;
  border: none !important;
  padding: 0 !important;
  font-family: inherit !important;
  font-size: inherit !important;
  color: inherit !important;
}

/* Post Layout Elements */
.post-layout {
  padding-top: 0.5rem;
}

.post-navigation {
  margin-bottom: 1.75rem;
}

.back-link {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.88rem;
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  text-decoration: none;
  transition: color 0.15s ease;
}

.back-link:hover {
  color: var(--text-main);
  text-decoration: underline;
}

.post-header {
  margin-bottom: 2rem;
  border-bottom: 1px dashed var(--input-border);
  padding-bottom: 1.5rem;
}

.post-meta {
  display: flex;
  align-items: baseline;
  gap: 0.65rem;
  color: var(--text-faint);
  font-size: 0.85rem;
  margin-top: 0.75rem;
  flex-wrap: wrap;
}

.meta-separator {
  color: var(--text-faint);
}

.read-time {
  color: var(--text-faint);
  font-size: 0.82rem;
}

.post-description {
  margin-top: 0.75rem;
  font-style: italic;
}

/* Toast Notification */
.toast {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--bg-base);
  border: 1px solid var(--text-muted);
  color: var(--text-main);
  padding: 0.5rem 1rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
  opacity: 0;
  pointer-events: none;
  transition: all 0.25s ease;
  z-index: 100;
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* Minimal Footer */
footer {
  padding: 2rem 0;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
  color: var(--text-faint);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

/* Custom Typography Preserved From Prototype */
.intro-title, .view-title, .section-head h2 {
  font-family: 'Dela Gothic One', 'Hiragino Sans', 'Yu Gothic', sans-serif !important;
  letter-spacing: 0.02em;
}

nav a, .nav-item, nav { font-family: 'Fira Code', monospace !important; }
h1, .hero-title, .title-bold { font-family: 'Dela Gothic One', sans-serif !important; }
h2, h3, .project-title, .blog-title, .post-title, .entry-title { font-family: 'Space Grotesk', sans-serif !important; font-weight: 600 !important; }
p, .bio-text, .description, .post-excerpt { font-family: 'Plus Jakarta Sans', sans-serif !important; font-weight: 400 !important; line-height: 1.65 !important; }
.date, .post-date, time, .meta { font-family: 'JetBrains Mono', monospace !important; letter-spacing: 0.03em !important; }
a.read-more, a.external, .contact-card a, .action-link, .back-link { font-family: 'IBM Plex Mono', monospace !important; font-weight: 500 !important; }
footer, .footer-text { font-family: 'Fira Code', monospace !important; font-size: 0.8rem !important; }

/* ========================================================= */
/* Rouge Syntax Highlighting — Dark Theme (Default)           */
/* ========================================================= */
.highlight .c,
.highlight .cm,
.highlight .c1,
.highlight .cs { color: #637da4; font-style: italic; } /* Comment */
.highlight .cp { color: #82aaff; font-weight: 500; } /* Preprocessor */
.highlight .k,
.highlight .kd,
.highlight .kn,
.highlight .kp,
.highlight .kr { color: #8FB3E2; font-weight: 600; } /* Keyword */
.highlight .kt { color: #a8c7fa; font-weight: 600; } /* Keyword.Type */
.highlight .s,
.highlight .s1,
.highlight .s2,
.highlight .sb,
.highlight .sc,
.highlight .sd,
.highlight .se,
.highlight .sh,
.highlight .si,
.highlight .sx { color: #b3d4ff; } /* String */
.highlight .m,
.highlight .mi,
.highlight .mf,
.highlight .mh,
.highlight .mo,
.highlight .il { color: #d2b7ff; } /* Number */
.highlight .na,
.highlight .nf,
.highlight .fm { color: #D9E1F1; font-weight: 500; } /* Name.Function */
.highlight .nc { color: #8FB3E2; font-weight: 600; } /* Name.Class */
.highlight .nb { color: #8FB3E2; } /* Name.Builtin */
.highlight .no { color: #82aaff; } /* Name.Constant */
.highlight .nv,
.highlight .vc,
.highlight .vg,
.highlight .vi { color: #D9E1F1; } /* Name.Variable */
.highlight .o,
.highlight .ow { color: #8FB3E2; } /* Operator */
.highlight .p { color: #D9E1F1; } /* Punctuation */

/* ========================================================= */
/* Rouge Syntax Highlighting — Light Theme                   */
/* ========================================================= */
[data-theme="light"] .highlight .c,
[data-theme="light"] .highlight .cm,
[data-theme="light"] .highlight .c1,
[data-theme="light"] .highlight .cs { color: #5a74a6; font-style: italic; }
[data-theme="light"] .highlight .cp { color: #1E2E4F; font-weight: 500; }
[data-theme="light"] .highlight .k,
[data-theme="light"] .highlight .kd,
[data-theme="light"] .highlight .kn,
[data-theme="light"] .highlight .kp,
[data-theme="light"] .highlight .kr { color: #1E2E4F; font-weight: 600; }
[data-theme="light"] .highlight .kt { color: #31487A; font-weight: 600; }
[data-theme="light"] .highlight .s,
[data-theme="light"] .highlight .s1,
[data-theme="light"] .highlight .s2,
[data-theme="light"] .highlight .sb,
[data-theme="light"] .highlight .sc,
[data-theme="light"] .highlight .sd,
[data-theme="light"] .highlight .se,
[data-theme="light"] .highlight .sh,
[data-theme="light"] .highlight .si,
[data-theme="light"] .highlight .sx { color: #1e40af; }
[data-theme="light"] .highlight .m,
[data-theme="light"] .highlight .mi,
[data-theme="light"] .highlight .mf,
[data-theme="light"] .highlight .mh,
[data-theme="light"] .highlight .mo,
[data-theme="light"] .highlight .il { color: #6b21a8; }
[data-theme="light"] .highlight .na,
[data-theme="light"] .highlight .nf,
[data-theme="light"] .highlight .fm { color: #192338; font-weight: 500; }
[data-theme="light"] .highlight .nc { color: #1E2E4F; font-weight: 600; }
[data-theme="light"] .highlight .nb { color: #31487A; }
[data-theme="light"] .highlight .no { color: #1E2E4F; }
[data-theme="light"] .highlight .nv,
[data-theme="light"] .highlight .vc,
[data-theme="light"] .highlight .vg,
[data-theme="light"] .highlight .vi { color: #192338; }
[data-theme="light"] .highlight .o,
[data-theme="light"] .highlight .ow { color: #31487A; }
[data-theme="light"] .highlight .p { color: #192338; }