/* ============================================================
   TOKENS — edit these to retheme the entire site
============================================================ */
:root {
  --bg-base:        #161826;
  --bg-surface:     #232532;
  --bg-elevated:    #2b2e40;
  --border:         color-mix(in srgb, #e9e9ed 16%, transparent);
  --border-accent:  color-mix(in srgb, #e9e9ed 32%, transparent);

  --text-primary:   #e9e9ed;
  --text-secondary: color-mix(in srgb, #e9e9ed 55%, transparent);
  --text-muted:     color-mix(in srgb, #e9e9ed 38%, transparent);

  --accent:         #9184d9;
  --accent-300:     #d2cefd;
  --accent-dim:     #2b2741;
  --accent-glow:    rgba(145, 132, 217, 0.10);

  --font-sans: 'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  --radius-sm:  4px;
  --radius-md:  8px;
  --radius-lg:  14px;

  --shadow-md: 0 6px 18px rgba(0, 0, 0, 0.35);

  --space-xs:  0.25rem;
  --space-sm:  0.5rem;
  --space-md:  1rem;
  --space-lg:  2rem;
  --space-xl:  4rem;

  --nav-height: 56px;
  --max-width:  760px;
  --max-width-wide: 980px;
  --max-width-projects: 1400px;

  --transition: 150ms ease;
}

[data-theme="light"] {
  --bg-base:        #f5f0eb;
  --bg-surface:     #fdfaf7;
  --bg-elevated:    #ede8e1;
  --border:         #d6cfc6;
  --border-accent:  #b5ada3;

  --text-primary:   #141210;
  --text-secondary: #524d48;
  --text-muted:     #9e9890;

  --accent:         #5d5294;
  --accent-300:     #6b5fa8;
  --accent-dim:     #e7e5fe;
  --accent-glow:    rgba(93, 82, 148, 0.10);
}
/* ============================================================
   RESET
============================================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  background: var(--bg-base);
  color: var(--text-primary);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
ul { list-style: none; }
/* ============================================================
   SCROLL FADE-IN
============================================================ */
.fade-init {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.65s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.65s cubic-bezier(0.16, 1, 0.3, 1);
}
.fade-in {
  opacity: 1;
  transform: translateY(0);
}
@media (prefers-reduced-motion: reduce) {
  .fade-init { opacity: 1; transform: none; transition: none; }
}
/* ============================================================
   TYPOGRAPHY SCALE
============================================================ */
.t-display {
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: var(--space-md);
}
.hero-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
  flex-shrink: 0;
}
.hero-title { margin-bottom: var(--space-sm); }
.hero-title em {
  font-style: normal;
  color: var(--accent);
}
.t-headline {
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.2;
}
.t-label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
}
.t-body    { font-size: 1rem;    line-height: 1.75; }
.t-small   { font-size: 0.875rem; color: var(--text-secondary); }
.t-mono    { font-family: var(--font-mono); font-size: 0.8rem; }
.t-muted   { color: var(--text-secondary); }

/* ============================================================
   LAYOUT UTILITIES
============================================================ */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}
.section {
  padding: var(--space-xl) 0;
}
.section + .section {
  border-top: 1px solid transparent;
  border-image: linear-gradient(to right, transparent, var(--border) 48px, var(--border) calc(100% - 48px), transparent) 1;
}
.stack { display: flex; flex-direction: column; }
.stack-sm  { gap: var(--space-sm); }
.stack-md  { gap: var(--space-md); }
.stack-lg  { gap: var(--space-lg); }
.row { display: flex; align-items: center; }
.row-between { justify-content: space-between; }
.row-gap-sm { gap: var(--space-sm); }
.row-gap-md { gap: var(--space-md); }

/* ============================================================
   NAV
============================================================ */
#nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-height);
  background: color-mix(in srgb, var(--bg-base) 80%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  z-index: 100;
  transition: border-color var(--transition);
}
#nav.scrolled { border-color: var(--border); }
.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  text-decoration: none;
}

.nav-logo-text {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: 0.01em;
}
.nav-logo .nav-logo-text { color: var(--accent); }

.nav-links {
  display: flex;
  gap: var(--space-lg);
  align-items: center;
}
.nav-links a {
  font-size: 0.85rem;
  color: var(--text-secondary);
  transition: color var(--transition);
}
.nav-links a:hover,
.nav-links a.active { color: var(--text-primary); }
.nav-links a.active { color: var(--accent); }

#theme-toggle {
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  padding: 4px 8px;
  font-size: 0.75rem;
  cursor: pointer;
  transition: border-color var(--transition), color var(--transition);
}
#theme-toggle:hover { border-color: var(--border-accent); color: var(--text-primary); }

/* ============================================================
   HERO
============================================================ */
#hero {
  position: relative;
  overflow: hidden;
  padding-top: calc(var(--nav-height) + var(--space-xl));
  padding-bottom: var(--space-xl);
  min-height: 100svh;
  display: flex;
  align-items: center;
  background:
    radial-gradient(ellipse 80% 60% at 60% 40%, rgba(145, 132, 217, 0.06) 0%, transparent 70%),
    radial-gradient(ellipse 50% 40% at 20% 70%, rgba(121, 108, 191, 0.05) 0%, transparent 60%),
    var(--bg-base);
}
#hero .container {
  position: relative;
  z-index: 1;
  width: 100%;
}

.hero-tagline {
  font-size: clamp(1.1rem, 2.4vw, 1.4rem);
  font-weight: 500;
  color: var(--accent-300);
  margin-bottom: var(--space-sm);
  max-width: 480px;
}

/* HERO SPLIT LAYOUT */
.hero-grid {
  max-width: var(--max-width-wide);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-xl);
}
.hero-main {
  flex: 0 1 480px;
  min-width: 0;
}


@media (max-width: 860px) {
  .hero-grid {
    flex-wrap: wrap;
  }
  .hero-main,
  .hero-side {
    flex: 1 1 100%;
  }
}


.hero-sub {
  max-width: 480px;
  color: var(--text-secondary);
  font-size: 1.05rem;
  margin-bottom: var(--space-xl);
}


.hero-scroll-cue {
  position: absolute;
  bottom: var(--space-lg);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  color: var(--text-secondary);
  font-size: 0.7rem;
  font-family: var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  opacity: 0.7;
  transition: opacity var(--transition);
  z-index: 2;
}
.hero-scroll-cue:hover { opacity: 1; }
.hero-scroll-cue svg {
  animation: scroll-bounce 1.8s ease-in-out infinite;
}
@keyframes scroll-bounce {
  0%, 100% { transform: translateY(0); opacity: 0.5; }
  50%      { transform: translateY(6px); opacity: 1; }
}
@media (prefers-reduced-motion: reduce) {
  .hero-scroll-cue svg { animation: none; }
}

/* ============================================================
   TOPO CANVAS
============================================================ */
#topo-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: all;
  z-index: 0;
}
/* ============================================================
   BUTTONS
============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 0.55rem 1.1rem;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
  border: 1px solid transparent;
}
.btn-primary {
  background: transparent;
  color: var(--accent);
  border-color: var(--accent);
}
.btn-primary:hover { background: var(--accent-glow); }
.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border-color: var(--border);
}
.btn-ghost:hover { border-color: var(--border-accent); color: var(--text-primary); }

.btn svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

/* ============================================================
   SECTION HEADER
============================================================ */
.section-header {
  margin-bottom: var(--space-lg);
}
.section-header .t-label { margin-bottom: var(--space-sm); }

/* ============================================================
   ABOUT
============================================================ */
.about-body {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  max-width: 640px;
}
.about-body p {
  color: var(--text-secondary);
  font-size: 0.98rem;
  line-height: 1.75;
}


/* ============================================================
   EXPERIENCE — timeline rail
============================================================ */
.exp-timeline {
  display: flex;
  gap: var(--space-lg);
  align-items: flex-start;
}
.exp-rail {
  flex: 0 0 20px;
  position: relative;
  align-self: stretch;
}
.exp-rail-line {
  position: absolute;
  left: 9px;
  top: 28px;
  bottom: 28px;
  width: 1px;
  background: var(--border);
}
.exp-rail-dots {
  position: relative;
  height: 100%;
  display: flex;
  flex-direction: column;
}
.exp-rail-dot {
  position: absolute;
  left: 0;
  width: 19px;
  height: 19px;
  border-radius: 50%;
  background: var(--bg-base);
  border: 2px solid var(--border-accent);
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition), box-shadow var(--transition);
  padding: 0;
}
.exp-rail-dot:hover { border-color: var(--accent); }
.exp-rail-dot.is-current {
  border-color: var(--accent);
  background: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-glow);
}
.exp-rail-dot.is-open {
  border-color: var(--accent);
}
.exp-rail-dot:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.exp-list-col {
  flex: 1;
  min-width: 0;
}

.exp-list {
  list-style: none;
  margin-top: var(--space-sm);
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.exp-list li {
  position: relative;
  padding-left: 16px;
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
}
.exp-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0.7;
}

@media (max-width: 600px) {
  .exp-rail { display: none; }
  .exp-timeline { gap: 0; }
  .exp-meta::before {
    content: "";
    display: inline-block;
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--border-accent);
    margin-right: 8px;
    vertical-align: middle;
  }
  .is-expanded .exp-meta::before {
    background: var(--accent);
  }
}

/* ============================================================
   EXPERIENCE
============================================================ */
.exp-toggle-row {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
}
.exp-logo {
  flex: 0 0 52px;
  width: 52px;
  height: 52px;
  padding: 6px;
  box-sizing: border-box;
  border-radius: var(--radius-md);
  background: #18181b;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  overflow: hidden;
}
.exp-logo img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}
.exp-toggle-content {
  flex: 1;
  min-width: 0;
}

.exp-item {
  border-bottom: 1px solid var(--border);
}
.exp-item:last-child { border-bottom: none; }

.exp-toggle {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-lg) 0;
  position: relative;
  display: block;
  color: inherit;
  font-family: inherit;
}
.exp-toggle:hover .exp-role { color: var(--accent); }
.exp-toggle:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

.exp-meta {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--space-md);
  flex-wrap: wrap;
  margin-bottom: var(--space-sm);
  padding-right: var(--space-lg);
}
.exp-role {
  font-weight: 600;
  font-size: 1rem;
  transition: color var(--transition);
}
.exp-period {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  white-space: nowrap;
}
.exp-company { color: var(--accent); font-size: 0.875rem; margin-bottom: var(--space-sm); }
.exp-body { color: var(--text-secondary); font-size: 0.9rem; }

.exp-chevron {
  position: absolute;
  top: var(--space-lg);
  right: 0;
  width: 18px;
  height: 18px;
  color: var(--text-muted);
  transition: transform var(--transition), color var(--transition);
}
.exp-toggle:hover .exp-chevron { color: var(--text-secondary); }
.is-expanded .exp-chevron { transform: rotate(180deg); }

.exp-details {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}
.is-expanded .exp-details {
  max-height: 600px;
  padding-bottom: var(--space-lg);
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-top: var(--space-sm);
}
.tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  border: 1px solid;
  background: transparent;
}

.tag-lang {
  color: #e4a86e;
  border-color: #e4a86e30;
  background: #e4a86e08;
}
.tag-framework {
  color: #7aa2e4;
  border-color: #7aa2e430;
  background: #7aa2e408;
}
.tag-tool {
  color: #a87ae4;
  border-color: #a87ae430;
  background: #a87ae408;
}
.tag-concept {
  color: var(--accent);
  border-color: #9184d930;
  background: #9184d908;
}

[data-theme="light"] .tag-lang      { color: #9a3412; background: #e4a86e12; border-color: #e4a86e50; }
[data-theme="light"] .tag-framework { color: #1e40af; background: #7aa2e412; border-color: #7aa2e450; }
[data-theme="light"] .tag-tool      { color: #6b21a8; background: #a87ae412; border-color: #a87ae450; }
[data-theme="light"] .tag-concept   { background: #5d529412; border-color: #5d529450; }
/* ============================================================
   PROJECTS
============================================================ */
#projects .container { max-width: var(--max-width-projects); }
.projects-scroll-wrap { position: relative; }
.projects-grid {
  display: flex;
  gap: var(--space-md);
  overflow-x: auto;
  overflow-y: hidden;
  scroll-snap-type: x proximity;
  padding-bottom: var(--space-md);
  margin-bottom: calc(var(--space-md) * -1);
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}
.projects-grid::-webkit-scrollbar { height: 8px; }
.projects-grid::-webkit-scrollbar-track { background: transparent; }
.projects-grid::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }
.projects-grid::-webkit-scrollbar-thumb:hover { background: var(--accent); }
.projects-fade {
  position: absolute;
  top: 0;
  bottom: var(--space-md);
  width: 72px;
  pointer-events: none;
  z-index: 2;
  opacity: 1;
  transition: opacity var(--transition);
}
.projects-fade.left  { left: 0;  background: linear-gradient(to right, var(--bg-base), transparent); opacity: 0; }
.projects-fade.right { right: 0; background: linear-gradient(to left,  var(--bg-base), transparent); }
.projects-scroll-wrap.is-at-start .projects-fade.left  { opacity: 0; }
.projects-scroll-wrap:not(.is-at-start) .projects-fade.left { opacity: 1; }
.projects-scroll-wrap.is-at-end .projects-fade.right { opacity: 0; }
.projects-nav {
  position: absolute;
  top: 45%;
  transform: translateY(-50%);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--bg-surface);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 3;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
  transition: opacity var(--transition), border-color var(--transition), color var(--transition);
}
.projects-nav:hover { border-color: var(--accent); color: var(--accent); }
.projects-nav svg { width: 18px; height: 18px; }
.projects-nav.prev { left: -8px; }
.projects-nav.next { right: -8px; }
.projects-scroll-wrap.is-at-start .projects-nav.prev,
.projects-scroll-wrap.is-at-end .projects-nav.next {
  opacity: 0;
  pointer-events: none;
}
.project-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: var(--space-lg);
  transition: border-color var(--transition), background var(--transition);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  flex: 0 0 380px;
  width: 380px;
  scroll-snap-align: start;
}
.project-card:hover {
  border-color: var(--border-accent);
  background: var(--bg-elevated);
}
.project-thumb {
  position: relative;
  aspect-ratio: 3 / 2;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--bg-base);
  border: 1px solid var(--border);
}
.project-thumb-track {
  display: flex;
  width: 100%;
  height: 100%;
  transition: transform var(--transition);
}
.project-thumb-track img {
  flex: 0 0 100%;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.project-thumb-placeholder {
  flex: 0 0 100%;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  color: var(--text-muted);
}
.project-thumb-placeholder svg { width: 26px; height: 26px; opacity: 0.7; }
.project-thumb-placeholder span {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.project-thumb-dots {
  position: absolute;
  bottom: 8px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 5px;
}
.project-thumb-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--border);
  border: none;
  padding: 0;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
}
.project-thumb-dot.is-active { background: var(--accent); transform: scale(1.2); }
.project-thumb-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg-base) 70%, transparent);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  transition: opacity var(--transition), background var(--transition);
}
.project-thumb:hover .project-thumb-arrow { opacity: 1; }
.project-thumb-arrow:hover { background: var(--accent-dim); }
.project-thumb-arrow.prev { left: 8px; }
.project-thumb-arrow.next { right: 8px; }
.project-thumb-arrow svg { width: 14px; height: 14px; }
.project-thumb[data-count="0"] .project-thumb-arrow,
.project-thumb[data-count="1"] .project-thumb-arrow,
.project-thumb[data-count="0"] .project-thumb-dots,
.project-thumb[data-count="1"] .project-thumb-dots { display: none; }
.project-num {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
}
.project-title { font-weight: 600; font-size: 1rem; }
.project-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
}
.project-stats {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
}
.project-stats li {
  position: relative;
  padding-left: 14px;
  font-size: 0.825rem;
  color: var(--text-secondary);
  line-height: 1.5;
}
.project-stats li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0.7;
}
.project-stats li strong {
  color: var(--text-primary);
  font-weight: 600;
}
.project-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-sm);
  border-top: 1px solid var(--border);
  margin-top: var(--space-sm);
}
.project-link {
  font-size: 0.8rem;
  color: var(--accent);
  display: flex;
  align-items: center;
  gap: 4px;
  transition: gap var(--transition);
}
.project-link:hover { gap: 8px; }

/* ============================================================
   WRITING
============================================================ */
.article-list { display: flex; flex-direction: column; }
.article-item {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--space-md);
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--border);
  transition: color var(--transition);
}
.article-item:first-child { border-top: 1px solid var(--border); }
.article-item:hover .article-title { color: var(--accent); }
.article-title {
  font-size: 0.95rem;
  font-weight: 500;
  transition: color var(--transition);
}
.article-date {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  white-space: nowrap;
}
.article-teaser {
  font-size: 0.825rem;
  color: var(--text-secondary);
  margin-top: 2px;
}
.article-list > li.is-hidden { display: none; }

.writing-pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  margin-top: var(--space-lg);
}
.writing-page-nav {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--bg-surface);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: opacity var(--transition), border-color var(--transition), color var(--transition);
}
.writing-page-nav:hover { border-color: var(--accent); color: var(--accent); }
.writing-page-nav svg { width: 16px; height: 16px; }
.writing-page-nav:disabled { opacity: 0.35; cursor: default; pointer-events: none; }
.writing-page-numbers { display: flex; gap: var(--space-xs); }
.writing-page-btn {
  min-width: 32px;
  height: 32px;
  padding: 0 8px;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  cursor: pointer;
  transition: color var(--transition), border-color var(--transition), background var(--transition);
}
.writing-page-btn:hover { color: var(--text-primary); border-color: var(--border); }
.writing-page-btn.is-active {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--bg-surface);
}

/* ============================================================
   CONTACT
============================================================ */
#contact {
  text-align: center;
  background: var(--bg-surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
#contact .container {
  padding-top: var(--space-xl);
  padding-bottom: var(--space-xl);
}
.contact-inner {
  max-width: 480px;
  margin: 0 auto;
}
.contact-inner .t-headline { margin-bottom: var(--space-sm); }
.contact-inner p { color: var(--text-secondary); margin-bottom: var(--space-lg); }
.contact-links {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
}
/* ============================================================
   FOOTER
============================================================ */
#footer {
  border-top: 1px solid var(--border);
  padding: var(--space-lg) 0;
}
.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-md);
  flex-wrap: wrap;
}
.footer-copy {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}
.footer-links {
  display: flex;
  gap: var(--space-md);
}
.footer-links a {
  font-size: 0.75rem;
  color: var(--text-muted);
  transition: color var(--transition);
}
.footer-links a:hover { color: var(--text-secondary); }

.exp-badge-current {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-dim);
  border: 1px solid var(--accent);
  border-radius: var(--radius-sm);
  padding: 2px 7px;
  margin-left: var(--space-sm);
  vertical-align: middle;
}

/* ============================================================
   DIVIDER
============================================================ */
.divider {
  width: 32px;
  height: 2px;
  background: var(--accent);
  border-radius: 1px;
  margin: var(--space-sm) 0 var(--space-md);
}

/* ============================================================
   RESPONSIVE
============================================================ */
@media (max-width: 600px) {
  .project-card { flex-basis: 82vw; width: 82vw; }
  .projects-nav, .projects-fade { display: none; }
  .article-item { flex-direction: column; gap: 2px; }
}

.nav-menu-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  width: 32px;
  height: 32px;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}
.nav-menu-toggle svg { width: 18px; height: 18px; }

@media (max-width: 600px) {
  .nav-menu-toggle { display: flex; }

  .nav-links {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--bg-base);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-md);
    padding: var(--space-lg);
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition), transform var(--transition);
  }
  .nav-links.is-open {
    opacity: 1;
    transform: translateY(0);
    pointer-events: all;
  }
  .nav-links a { font-size: 1rem; }
  #theme-toggle { align-self: flex-start; }
}


/* ============================================================
   ARTICLE PAGES
============================================================ */
.article-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-lg);
  transition: color var(--transition);
}
.article-back:hover { color: var(--accent); }
.article-back svg { width: 14px; height: 14px; }

.article-header {
  padding-top: calc(var(--nav-height) + var(--space-xl));
  padding-bottom: var(--space-lg);
}
.article-header .t-label { margin-bottom: var(--space-sm); }
.article-page-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: var(--space-sm);
}
.article-meta-row {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: var(--space-md);
}

.article-content {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg) var(--space-xl);
}
.article-content p {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.8;
  margin-bottom: var(--space-md);
}
.article-content p a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}
.article-content p a:hover { color: var(--text-primary); }
.article-content h2 {
  font-size: 1.4rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text-primary);
  margin: var(--space-xl) 0 var(--space-md);
}
.article-content h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: var(--space-lg) 0 var(--space-sm);
}
.article-content ul,
.article-content ol {
  margin: 0 0 var(--space-md) var(--space-md);
  padding-left: var(--space-md);
  color: var(--text-secondary);
  line-height: 1.8;
}
.article-content ul { list-style: disc; }
.article-content ol { list-style: decimal; }
.article-content li { margin-bottom: var(--space-xs); }
.article-content strong { color: var(--text-primary); font-weight: 600; }
.article-content code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 2px 6px;
  color: var(--accent);
}
.article-content pre {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  overflow-x: auto;
  margin-bottom: var(--space-md);
}
.article-content pre code {
  background: none;
  border: none;
  padding: 0;
  color: var(--text-primary);
  font-size: 0.85rem;
  line-height: 1.6;
}
.article-content blockquote {
  border-left: 2px solid var(--accent);
  padding-left: var(--space-md);
  color: var(--text-secondary);
  margin: var(--space-md) 0;
}
.article-content img {
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  margin: var(--space-md) 0;
}
.article-footer-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-lg);
  border-top: 1px solid var(--border);
  margin-top: var(--space-xl);
}

.cred-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
}
.cred-card {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: var(--space-md) var(--space-lg);
  flex: 1 1 280px;
  transition: border-color var(--transition), background var(--transition);
}
.cred-card:hover {
  border-color: var(--border-accent);
  background: var(--bg-elevated);
}
.cred-icon {
  flex: 0 0 52px;
  width: 52px;
  height: 52px;
  padding: 6px;
  box-sizing: border-box;
  border-radius: var(--radius-md);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  overflow: hidden;
}
.cred-icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}
.cred-title {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text-primary);
}
.cred-issuer {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 2px;
}

/* ============================================================
   CONTACT FORM
============================================================ */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  text-align: left;
  margin-bottom: var(--space-lg);
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
}
.form-row {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.form-row label {
  font-size: 0.78rem;
  color: var(--text-secondary);
  font-weight: 500;
}
.form-row select,
.form-row input,
.form-row textarea {
  font-family: var(--font-sans);
  font-size: 0.9rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  padding: 0.5rem 0.65rem;
  transition: border-color var(--transition);
}
.form-row select:focus,
.form-row input:focus,
.form-row textarea:focus {
  outline: none;
  border-color: var(--accent);
}
.form-row textarea {
  resize: vertical;
  min-height: 70px;
  font-family: inherit;
}
.contact-form .btn {
  align-self: flex-start;
  margin-top: var(--space-xs);
}

.article-badge-pick {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-dim);
  border: 1px solid var(--accent);
  border-radius: var(--radius-sm);
  padding: 2px 7px;
  margin-left: var(--space-sm);
  vertical-align: middle;
}