/* ------- Tokens ------- */
:root {
  --bg: #0b0b0d;
  --bg-2: #111114;
  --bg-3: #1a1a1f;
  --fg: #ecebe6;
  --fg-2: #b9b7ad;
  --fg-3: #6c6a62;
  --rule: #26262b;
  --rule-2: #33333a;
  --accent: oklch(0.78 0.14 58);
  --accent-2: oklch(0.68 0.16 58);
  --accent-ink: #0b0b0d;
  --ok: oklch(0.78 0.14 145);
  --warn: oklch(0.78 0.14 60);

  --ff-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --ff-sans: "Inter", system-ui, -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;
  --ff-serif: "Instrument Serif", "Iowan Old Style", "Palatino", Georgia, serif;

  --unit: 8px;
  --pad: clamp(20px, 4vw, 56px);
  --maxw: 1400px;

  color-scheme: dark;
}

:root[data-theme="light"] {
  --bg: #f4f1e9;
  --bg-2: #ece8dd;
  --bg-3: #e1dccd;
  --fg: #171614;
  --fg-2: #4a4842;
  --fg-3: #7a786f;
  --rule: #d8d3c3;
  --rule-2: #c2bca9;
  --accent: oklch(0.58 0.14 50);
  --accent-2: oklch(0.48 0.16 50);
  --accent-ink: #f4f1e9;
  color-scheme: light;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--ff-sans);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

::selection { background: var(--accent); color: var(--accent-ink); }

a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }

/* ------- Grid background ------- */
.grid-bg {
  position: fixed; inset: 0; pointer-events: none; z-index: 0;
  background-image:
    linear-gradient(to right, var(--rule) 1px, transparent 1px),
    linear-gradient(to bottom, var(--rule) 1px, transparent 1px);
  background-size: 80px 80px;
  opacity: .25;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, #000 40%, transparent 100%);
}
body[data-grid="off"] .grid-bg { display: none; }

/* ------- Chrome ------- */
.chrome {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px var(--pad);
  backdrop-filter: blur(18px) saturate(1.1);
  -webkit-backdrop-filter: blur(18px) saturate(1.1);
  background: color-mix(in oklch, var(--bg) 72%, transparent);
  border-bottom: 1px solid var(--rule);
  font-family: var(--ff-mono);
  font-size: 12px;
  letter-spacing: .04em;
}
.chrome .brand {
  display: flex; align-items: center; gap: 10px;
  text-transform: uppercase;
}
.brand-dot {
  width: 9px; height: 9px; background: var(--accent); border-radius: 2px;
  box-shadow: 0 0 0 3px color-mix(in oklch, var(--accent) 20%, transparent);
  animation: pulse 2.6s ease-in-out infinite;
}
@keyframes pulse {
  0%,100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.2); opacity: .7; }
}
.chrome nav { display: flex; gap: 22px; }
.chrome nav a {
  color: var(--fg-2);
  transition: color .2s;
  text-transform: lowercase;
}
.chrome nav a:hover { color: var(--fg); }
.chrome nav a::before { content: "· "; color: var(--fg-3); }

.chrome .tools { display: flex; align-items: center; gap: 8px; }
.seg {
  display: inline-flex; border: 1px solid var(--rule-2); border-radius: 999px;
  padding: 2px; font-family: var(--ff-mono); font-size: 11px;
}
.seg button {
  padding: 4px 10px; border-radius: 999px; color: var(--fg-2);
  transition: all .2s;
}
.seg button.on { background: var(--fg); color: var(--bg); }
.seg button:not(.on):hover { color: var(--fg); }

@media (max-width: 900px) {
  .chrome nav { display: none; }
}

/* ------- Section scaffold ------- */
main { position: relative; z-index: 1; }
section {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 96px var(--pad);
  position: relative;
}
section + section { border-top: 1px solid var(--rule); }

.kicker {
  font-family: var(--ff-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 24px;
  display: flex; align-items: center; gap: 10px;
}
.kicker::before {
  content: ""; width: 18px; height: 1px; background: var(--accent);
}

h1, h2, h3 { margin: 0; font-weight: 500; letter-spacing: -0.02em; }
h1 { font-size: clamp(48px, 8vw, 120px); line-height: .96; }
h2 { font-size: clamp(34px, 4.5vw, 64px); line-height: 1.04; }
h3 { font-size: clamp(20px, 2vw, 28px); line-height: 1.2; }

.section-title { max-width: 900px; text-wrap: balance; }
.section-sub { color: var(--fg-2); max-width: 680px; margin-top: 14px; text-wrap: pretty; }

/* ------- Hero ------- */
.hero {
  padding-top: 140px;
  padding-bottom: 80px;
}
.hero-kicker {
  font-family: var(--ff-mono);
  font-size: 12px;
  color: var(--fg-3);
  margin-bottom: 32px;
  display: flex; align-items: center; gap: 16px; flex-wrap: wrap;
}
.hero-kicker .tag {
  padding: 2px 8px; border: 1px solid var(--rule-2); border-radius: 4px;
  color: var(--fg-2);
}
.hero-kicker .tag.live { color: var(--accent); border-color: color-mix(in oklch, var(--accent) 40%, transparent); }
.hero-kicker .tag.live::before {
  content: "●"; margin-right: 6px;
  animation: pulse 1.6s ease-in-out infinite;
}

.hero-name {
  font-family: var(--ff-serif);
  font-style: italic;
  font-weight: 400;
  letter-spacing: -0.03em;
  margin-bottom: 8px;
}
.hero-tag {
  font-family: var(--ff-sans);
  font-weight: 300;
  font-size: clamp(28px, 4vw, 54px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--fg-2);
  max-width: 1100px;
  margin-top: 24px;
  text-wrap: balance;
}
.hero-tag em {
  font-family: var(--ff-emphasis, "Space Grotesk", "Inter", sans-serif);
  font-style: italic;
  color: var(--fg);
  font-weight: var(--ff-emphasis-weight, 500);
  letter-spacing: -0.01em;
}
.hero-tag .accent { color: var(--accent); font-style: normal; font-family: var(--ff-sans); }

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 60px;
  margin-top: 72px;
  align-items: start;
}
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
}

.hero-intro {
  font-size: 18px;
  color: var(--fg-2);
  max-width: 560px;
  text-wrap: pretty;
}

.cta-row { display: flex; gap: 12px; margin-top: 28px; flex-wrap: wrap; }

.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 12px 20px;
  border-radius: 999px;
  font-family: var(--ff-mono);
  font-size: 12px;
  letter-spacing: .04em;
  text-transform: uppercase;
  transition: all .2s;
  border: 1px solid var(--rule-2);
}
.btn.primary {
  background: var(--accent); color: var(--accent-ink); border-color: var(--accent);
}
.btn.primary:hover {
  background: var(--accent-2); border-color: var(--accent-2);
  transform: translateY(-1px);
}
.btn.ghost:hover { border-color: var(--fg-2); color: var(--fg); }
.btn .arr { transition: transform .2s; }
.btn:hover .arr { transform: translateX(3px); }

/* Terminal */
.terminal {
  background: var(--bg-2);
  border: 1px solid var(--rule);
  border-radius: 10px;
  font-family: var(--ff-mono);
  font-size: 13px;
  line-height: 1.7;
  overflow: hidden;
  box-shadow: 0 40px 80px -40px rgba(0,0,0,.5);
}
.terminal-head {
  display: flex; align-items: center; gap: 6px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--rule);
  color: var(--fg-3);
  font-size: 11px;
  letter-spacing: .04em;
}
.terminal-head .dots { display: flex; gap: 5px; margin-right: 10px; }
.terminal-head .dot { width: 10px; height: 10px; border-radius: 50%; background: var(--bg-3); }
.terminal-head .path { color: var(--fg-3); }
.terminal-body { padding: 16px 20px 22px; min-height: 260px; }
.t-line { display: flex; gap: 10px; }
.t-prompt { color: var(--accent); user-select: none; }
.t-in { color: var(--fg); }
.t-out { color: var(--fg-2); padding-left: 24px; }
.t-caret {
  display: inline-block; width: 8px; height: 14px; background: var(--accent);
  vertical-align: -2px; margin-left: 2px;
  animation: blink 1.1s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

/* Meta strip */
.meta-strip {
  display: flex; flex-wrap: wrap; gap: 18px 36px;
  padding: 20px 0;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  margin-top: 80px;
  font-family: var(--ff-mono);
  font-size: 11px;
  letter-spacing: .04em;
  color: var(--fg-3);
}
.meta-strip div { display: flex; gap: 10px; }
.meta-strip b { color: var(--fg); font-weight: 500; }

/* ------- Impact ------- */
.impact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  margin-top: 48px;
  background: var(--rule);
  border: 1px solid var(--rule);
}
@media (max-width: 900px) {
  .impact-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .impact-grid { grid-template-columns: 1fr; }
}
.impact-cell {
  background: var(--bg);
  padding: 40px 32px;
  position: relative;
  transition: background .3s;
}
.impact-cell:hover { background: var(--bg-2); }
.impact-cell::before {
  content: attr(data-idx);
  position: absolute; top: 14px; right: 16px;
  font-family: var(--ff-mono); font-size: 10px; color: var(--fg-3);
  letter-spacing: .08em;
}
.impact-value {
  font-family: var(--ff-serif);
  font-size: clamp(54px, 6vw, 84px);
  font-weight: 400;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--fg);
}
.impact-value .unit { color: var(--accent); font-family: var(--ff-sans); font-style: normal; font-size: .7em; font-weight: 400; }
.impact-label {
  font-family: var(--ff-mono);
  font-size: 11px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--fg-2);
  margin-top: 18px;
}
.impact-note {
  color: var(--fg-3);
  font-size: 13px;
  margin-top: 10px;
  line-height: 1.5;
}

/* ------- About ------- */
.about-grid {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 60px;
  margin-top: 48px;
}
@media (max-width: 900px) {
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
}
.portrait {
  aspect-ratio: 3 / 4;
  background: var(--bg-2);
  border: 1px solid var(--rule);
  position: relative;
  overflow: hidden;
  display: grid; place-items: center;
}
.portrait::before {
  content: "";
  position: absolute; inset: 0;
  background-image: repeating-linear-gradient(135deg, color-mix(in oklch, var(--fg) 5%, transparent) 0 1px, transparent 1px 8px);
}
.portrait .monogram {
  font-family: var(--ff-serif);
  font-size: 96px;
  font-style: italic;
  color: var(--fg);
  line-height: 1;
  z-index: 1;
}
.portrait .caption {
  position: absolute; bottom: 10px; left: 10px; right: 10px;
  font-family: var(--ff-mono); font-size: 10px; color: var(--fg-3);
  display: flex; justify-content: space-between;
}
.about-body p { color: var(--fg-2); font-size: 17px; max-width: 680px; text-wrap: pretty; }
.about-body p + p { margin-top: 18px; }
.about-body p em { color: var(--fg); font-style: italic; font-family: var(--ff-serif); font-size: 1.04em; }

.offhours {
  margin-top: 32px;
  padding: 18px 20px;
  border-left: 2px solid var(--accent);
  background: var(--bg-2);
  max-width: 680px;
}
.offhours .lbl {
  font-family: var(--ff-mono); font-size: 10px; color: var(--accent);
  letter-spacing: .1em; text-transform: uppercase;
}
.offhours p { margin: 6px 0 0; color: var(--fg-2); font-size: 15px; }

/* ------- Experience diagram ------- */
.exp-mode-toggle {
  display: inline-flex;
  margin-top: 28px;
  border: 1px solid var(--rule);
  border-radius: 6px;
  overflow: hidden;
  background: var(--bg-2);
}
.exp-mode-toggle button {
  appearance: none;
  background: transparent;
  color: var(--fg-2);
  border: 0;
  padding: 7px 14px;
  font: inherit;
  font-size: 13px;
  letter-spacing: 0.02em;
  cursor: pointer;
  border-right: 1px solid var(--rule);
}
.exp-mode-toggle button:last-child { border-right: 0; }
.exp-mode-toggle button:hover { color: var(--fg); }
.exp-mode-toggle button.on {
  background: var(--fg);
  color: var(--bg);
}
.arch-wrap {
  margin-top: 20px;
  border: 1px solid var(--rule);
  background: var(--bg-2);
  border-radius: 10px;
  overflow: hidden;
}
.arch-legend {
  display: flex; gap: 18px; padding: 12px 16px;
  border-bottom: 1px solid var(--rule);
  font-family: var(--ff-mono); font-size: 11px; color: var(--fg-3);
  flex-wrap: wrap;
}
.arch-legend .lg { display: flex; align-items: center; gap: 6px; }
.arch-legend .sw { width: 14px; height: 6px; border-radius: 2px; background: var(--fg-3); }
.arch-legend .sw.ai { background: var(--accent); }
.arch-legend .sw.ciam { background: oklch(0.7 0.12 260); }
.arch-legend .sw.plat { background: oklch(0.7 0.12 180); }

.arch-canvas {
  position: relative;
  padding: 32px 24px;
}
.arch-canvas svg { width: 100%; height: auto; display: block; }

.arch-detail {
  padding: 24px 28px;
  border-top: 1px solid var(--rule);
  background: var(--bg-3);
  min-height: 180px;
}
.arch-detail .dt-head {
  display: flex; justify-content: space-between; align-items: baseline;
  flex-wrap: wrap; gap: 12px;
  margin-bottom: 14px;
}
.arch-detail .dt-role {
  font-family: var(--ff-serif); font-size: 26px; color: var(--fg); letter-spacing: -0.01em;
}
.arch-detail .dt-co {
  font-family: var(--ff-mono); font-size: 12px; color: var(--fg-2);
  letter-spacing: .04em;
}
.arch-detail .dt-when {
  font-family: var(--ff-mono); font-size: 11px; color: var(--accent);
  letter-spacing: .06em;
}
.arch-detail ul {
  margin: 0; padding: 0; list-style: none;
  display: grid; grid-template-columns: 1fr 1fr; gap: 10px 32px;
  color: var(--fg-2); font-size: 14.5px;
}
@media (max-width: 700px) { .arch-detail ul { grid-template-columns: 1fr; } }
.arch-detail li {
  position: relative; padding-left: 18px;
}
.arch-detail li::before {
  content: "→"; position: absolute; left: 0; color: var(--accent); font-family: var(--ff-mono);
}

/* ------- Systems map ------- */
.systems-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  margin-top: 48px;
  background: var(--rule);
  border: 1px solid var(--rule);
}
@media (max-width: 900px) { .systems-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .systems-grid { grid-template-columns: 1fr; } }
.sys-cell {
  background: var(--bg);
  padding: 28px 26px;
  min-height: 220px;
  display: flex; flex-direction: column; justify-content: space-between;
  position: relative;
  transition: background .25s, transform .25s;
  cursor: pointer;
  text-align: left;
  border: 0;
  color: inherit;
  font: inherit;
  width: 100%;
}
.sys-cell:hover { background: var(--bg-2); }
.sys-cell:hover .sys-glyph { color: var(--accent); }
.sys-cell.active { background: var(--bg-2); outline: 1px solid var(--accent); outline-offset: -1px; }
.sys-cell.active .sys-glyph { color: var(--accent); }
.sys-cell-head { display: flex; align-items: center; justify-content: space-between; }
.sys-cell .sys-id {
  font-family: var(--ff-mono); font-size: 10px; color: var(--fg-3);
  letter-spacing: .08em;
}
.sys-band { width: 6px; height: 6px; border-radius: 50%; background: var(--fg-3); }
.sys-band-ai { background: var(--accent); }
.sys-band-ciam { background: oklch(0.7 0.12 260); }
.sys-band-plat { background: oklch(0.7 0.12 180); }
.sys-glyph {
  font-family: var(--ff-mono);
  font-size: 14px;
  color: var(--fg-2);
  letter-spacing: .02em;
  line-height: 1.5;
  margin: 14px 0;
  white-space: pre;
  transition: color .25s;
}
.sys-name {
  font-family: var(--ff-serif);
  font-size: 22px;
  letter-spacing: -0.01em;
  color: var(--fg);
}
.sys-note {
  font-size: 13px; color: var(--fg-2); margin-top: 8px; line-height: 1.5;
}
.sys-more {
  margin-top: 12px;
  font-family: var(--ff-mono); font-size: 10px; letter-spacing: .1em;
  text-transform: uppercase; color: var(--accent);
  opacity: 0; transition: opacity .25s;
}
.sys-cell:hover .sys-more, .sys-cell.active .sys-more { opacity: 1; }
.sys-loading {
  grid-column: 1 / -1;
  padding: 48px 26px;
  text-align: center;
  font-family: var(--ff-mono); font-size: 12px; color: var(--fg-3);
}

.sys-detail {
  margin-top: 1px;
  background: var(--bg-2);
  border: 1px solid var(--rule);
  border-top: 0;
  padding: 0;
  max-height: 0;
  overflow: hidden;
  transition: max-height .35s ease, padding .35s ease;
  position: relative;
}
.sys-detail.open {
  max-height: 2000px;
  padding: 32px 36px 36px;
}
.sys-detail-close {
  position: absolute; top: 14px; right: 18px;
  background: transparent; border: 1px solid var(--rule-2);
  color: var(--fg-2); width: 28px; height: 28px; border-radius: 50%;
  font-size: 18px; line-height: 1; cursor: pointer;
  transition: all .2s;
}
.sys-detail-close:hover { color: var(--fg); border-color: var(--fg-2); }
.sys-detail-head { margin-bottom: 18px; }
.sys-detail-id {
  font-family: var(--ff-mono); font-size: 10px; color: var(--fg-3);
  letter-spacing: .12em; text-transform: uppercase;
}
.sys-detail-name {
  font-family: var(--ff-serif);
  font-size: 32px;
  letter-spacing: -0.01em;
  margin: 6px 0 10px;
  color: var(--fg);
}
.sys-detail-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.sys-detail-tags span {
  font-family: var(--ff-mono); font-size: 10px; letter-spacing: .08em;
  color: var(--fg-3); padding: 3px 8px;
  border: 1px solid var(--rule-2); border-radius: 3px;
}
.sys-detail-glyph {
  font-family: var(--ff-mono); font-size: 14px; color: var(--accent);
  white-space: pre; margin: 20px 0;
  padding: 16px 20px; background: var(--bg);
  border: 1px solid var(--rule); border-radius: 6px;
  display: inline-block;
}
.sys-detail-body {
  max-width: 780px;
  color: var(--fg-2);
  font-size: 16px;
  line-height: 1.65;
  text-wrap: pretty;
}
.sys-detail-body h3 {
  font-family: var(--ff-mono); font-size: 11px;
  letter-spacing: .12em; text-transform: uppercase;
  color: var(--accent); margin: 28px 0 10px; font-weight: 500;
}
.sys-detail-body h3:first-child { margin-top: 0; }
.sys-detail-body p { margin: 12px 0; }
.sys-detail-body strong { color: var(--fg); font-weight: 500; }
.sys-detail-body code {
  font-family: var(--ff-mono); font-size: .92em;
  background: var(--bg); padding: 1px 6px; border-radius: 3px;
  border: 1px solid var(--rule);
}
.sys-detail-body ul { margin: 12px 0; padding-left: 20px; }
.sys-detail-body li { margin: 6px 0; }

/* ------- Skills ------- */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0;
  margin-top: 48px;
  border-top: 1px solid var(--rule);
}
@media (max-width: 700px) { .skills-grid { grid-template-columns: 1fr; } }
.skill-row {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 24px;
  padding: 22px 0;
  border-bottom: 1px solid var(--rule);
  grid-column: 1 / -1;
}
@media (max-width: 700px) { .skill-row { grid-template-columns: 1fr; gap: 8px; } }
.skill-head {
  font-family: var(--ff-mono);
  font-size: 12px;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--fg);
  padding-top: 3px;
}
.skill-head::before { content: "# "; color: var(--accent); }
.skill-list { color: var(--fg-2); font-size: 15px; line-height: 1.7; text-wrap: pretty; }

/* ------- Speaking ------- */
.speaking-wrap {
  margin-top: 48px;
  display: grid; grid-template-columns: 1fr 1fr; gap: 60px;
}
@media (max-width: 900px) { .speaking-wrap { grid-template-columns: 1fr; gap: 40px; } }
.speaking-wrap .topics { list-style: none; padding: 0; margin: 0; }
.speaking-wrap .topics li {
  padding: 16px 0;
  border-bottom: 1px dashed var(--rule);
  font-family: var(--ff-serif);
  font-size: 22px;
  letter-spacing: -0.01em;
  color: var(--fg);
  display: flex; gap: 18px; align-items: baseline;
}
.speaking-wrap .topics li .n {
  font-family: var(--ff-mono); font-size: 11px; color: var(--fg-3);
  letter-spacing: .06em;
}

/* ------- Chat ------- */
.chat-wrap {
  margin-top: 48px;
  border: 1px solid var(--rule);
  background: var(--bg-2);
  border-radius: 10px;
  overflow: hidden;
}
.chat-head {
  display: flex; justify-content: space-between; align-items: center;
  padding: 12px 18px;
  border-bottom: 1px solid var(--rule);
  font-family: var(--ff-mono); font-size: 11px; color: var(--fg-3);
  letter-spacing: .05em;
}
.chat-head .online { color: var(--accent); }
.chat-head .online::before { content: "●"; margin-right: 6px; animation: pulse 1.6s infinite; }
.chat-stream {
  min-height: 260px; max-height: 440px; overflow-y: auto;
  padding: 22px 24px;
  display: flex; flex-direction: column; gap: 14px;
  scrollbar-width: thin;
}
.msg {
  max-width: 80%;
  font-size: 15px; line-height: 1.55;
}
.msg.user {
  align-self: flex-end;
  background: var(--accent); color: var(--accent-ink);
  padding: 10px 14px; border-radius: 12px 12px 2px 12px;
}
.msg.bot {
  align-self: flex-start;
  color: var(--fg);
  font-family: var(--ff-serif); font-size: 18px; line-height: 1.5;
  padding: 4px 0;
  max-width: 90%;
}
.msg.bot .label {
  display: block;
  font-family: var(--ff-mono); font-size: 10px; color: var(--accent);
  letter-spacing: .1em; text-transform: uppercase; margin-bottom: 6px;
}
.msg.bot.thinking { color: var(--fg-3); font-style: italic; }

.chat-suggest {
  display: flex; flex-wrap: wrap; gap: 8px;
  padding: 0 24px 14px;
}
.chat-suggest button {
  padding: 6px 12px;
  border: 1px solid var(--rule-2);
  border-radius: 999px;
  font-family: var(--ff-mono); font-size: 11px;
  color: var(--fg-2);
  transition: all .2s;
}
.chat-suggest button:hover { border-color: var(--accent); color: var(--accent); }

.chat-input {
  display: flex; gap: 0;
  border-top: 1px solid var(--rule);
  background: var(--bg-3);
}
.chat-input input {
  flex: 1; background: transparent; border: 0; outline: 0;
  color: var(--fg); font-family: var(--ff-mono); font-size: 14px;
  padding: 14px 18px;
}
.chat-input input::placeholder { color: var(--fg-3); }
.chat-input button {
  padding: 0 22px;
  font-family: var(--ff-mono); font-size: 12px; letter-spacing: .05em;
  text-transform: uppercase;
  color: var(--accent-ink); background: var(--accent);
  transition: background .2s;
}
.chat-input button:hover { background: var(--accent-2); }
.chat-disclaimer {
  padding: 10px 18px;
  font-family: var(--ff-mono); font-size: 10px; color: var(--fg-3);
  letter-spacing: .04em;
  border-top: 1px solid var(--rule);
}

/* ------- Contact ------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  margin-top: 48px;
}
@media (max-width: 700px) { .contact-grid { grid-template-columns: 1fr; gap: 32px; } }
.contact-list { list-style: none; padding: 0; margin: 0; }
.contact-list li {
  display: grid; grid-template-columns: 120px 1fr auto;
  gap: 16px; align-items: baseline;
  padding: 18px 0;
  border-bottom: 1px solid var(--rule);
}
.contact-list .k {
  font-family: var(--ff-mono); font-size: 11px; color: var(--fg-3);
  letter-spacing: .08em; text-transform: uppercase;
}
.contact-list .v {
  font-family: var(--ff-serif); font-size: 22px; color: var(--fg);
  letter-spacing: -0.01em;
}
.contact-list a.v:hover { color: var(--accent); }
.contact-list .v .arr { margin-left: 6px; color: var(--fg-3); transition: transform .2s, color .2s; display: inline-block; }
.contact-list a.v:hover .arr { color: var(--accent); transform: translate(3px,-3px); }

.contact-mono {
  font-family: var(--ff-mono);
  font-size: 12px;
  line-height: 1.7;
  color: var(--fg-2);
  padding: 24px;
  border: 1px solid var(--rule);
  background: var(--bg-2);
}
.contact-mono .c { color: var(--fg-3); }
.contact-mono .k { color: var(--accent); }
.contact-mono .s { color: var(--fg); }

/* ------- Footer ------- */
footer {
  padding: 40px var(--pad);
  border-top: 1px solid var(--rule);
  font-family: var(--ff-mono);
  font-size: 11px;
  color: var(--fg-3);
  display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap;
  max-width: var(--maxw); margin: 0 auto;
  letter-spacing: .04em;
}
footer .colophon { max-width: 600px; }

/* ------- Tweaks panel ------- */
.tweaks {
  position: fixed; right: 20px; bottom: 20px; z-index: 100;
  width: 280px;
  background: var(--bg-2);
  border: 1px solid var(--rule-2);
  border-radius: 10px;
  box-shadow: 0 30px 60px -20px rgba(0,0,0,.5);
  font-family: var(--ff-mono);
  font-size: 12px;
  display: none;
  overflow: hidden;
}
.tweaks.show { display: block; }
.tweaks-head {
  padding: 10px 14px;
  border-bottom: 1px solid var(--rule);
  display: flex; justify-content: space-between; align-items: center;
  color: var(--fg-3);
  letter-spacing: .08em;
  text-transform: uppercase;
}
.tweaks-head .title { color: var(--fg); }
.tweaks-body { padding: 14px; display: flex; flex-direction: column; gap: 14px; }
.tw-row { display: flex; flex-direction: column; gap: 6px; }
.tw-row .lbl { color: var(--fg-3); letter-spacing: .04em; text-transform: uppercase; font-size: 10px; }
.tw-opts { display: flex; gap: 4px; flex-wrap: wrap; }
.tw-opts button {
  padding: 5px 9px; border: 1px solid var(--rule-2); border-radius: 4px;
  color: var(--fg-2); font-size: 11px;
}
.tw-opts button.on { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.tw-swatch { display: inline-block; width: 14px; height: 14px; border-radius: 3px; margin-right: 6px; vertical-align: -3px; }

.tw-opts-fonts { display: grid; grid-template-columns: repeat(5, 1fr); gap: 4px; }
.tw-font-btn {
  display: flex; flex-direction: column; align-items: center; gap: 3px;
  padding: 6px 3px !important;
  line-height: 1;
}
.tw-font-prev { font-size: 18px; line-height: 1; color: var(--fg); }
.tw-font-btn.on .tw-font-prev { color: var(--accent-ink); }
.tw-font-lbl { font-size: 8px; letter-spacing: .04em; text-transform: uppercase; opacity: .75; }
.tw-toggle {
  display: flex; justify-content: space-between; align-items: center;
  color: var(--fg-2);
}
.tw-toggle input { accent-color: var(--accent); }

/* ------- Reduced motion ------- */
body[data-reduced="true"] *, body[data-reduced="true"] *::before, body[data-reduced="true"] *::after {
  animation-duration: 0.001s !important;
  transition-duration: 0.001s !important;
}

/* Density */
body[data-density="compact"] section { padding: 64px var(--pad); }
body[data-density="roomy"] section { padding: 128px var(--pad); }

body[data-emphasis="space-gro"]  { --ff-emphasis: "Space Grotesk", sans-serif; --ff-emphasis-weight: 500; }
body[data-emphasis="instrument"] { --ff-emphasis: "Instrument Serif", Georgia, serif; --ff-emphasis-weight: 400; }
body[data-emphasis="fraunces"]   { --ff-emphasis: "Fraunces", Georgia, serif; --ff-emphasis-weight: 500; }
body[data-emphasis="playfair"]   { --ff-emphasis: "Playfair Display", Georgia, serif; --ff-emphasis-weight: 500; }
body[data-emphasis="inter"]      { --ff-emphasis: "Inter", sans-serif; --ff-emphasis-weight: 500; }
body[data-emphasis="jetbrains"]  { --ff-emphasis: "JetBrains Mono", monospace; --ff-emphasis-weight: 500; }

/* Display font swap — unified selector */
.display-target,
.hero-name,
.impact-value,
h2,
.sys-name,
.speaking-wrap .topics li,
.contact-list .v,
.arch-detail .dt-role { font-family: var(--ff-display, var(--ff-serif)); font-style: var(--ff-display-style, italic); font-weight: var(--ff-display-weight, 400); letter-spacing: var(--ff-display-tracking, -0.02em); }

body[data-display="instrument"] { --ff-display: "Instrument Serif", Georgia, serif; --ff-display-style: italic; --ff-display-weight: 400; --ff-display-tracking: -0.02em; }
body[data-display="fraunces"]  { --ff-display: "Fraunces", Georgia, serif; --ff-display-style: normal; --ff-display-weight: 600; --ff-display-tracking: -0.03em; }
body[data-display="dm-serif"]  { --ff-display: "DM Serif Display", Georgia, serif; --ff-display-style: normal; --ff-display-weight: 400; --ff-display-tracking: -0.02em; }
body[data-display="playfair"]  { --ff-display: "Playfair Display", Georgia, serif; --ff-display-style: italic; --ff-display-weight: 500; --ff-display-tracking: -0.015em; }
body[data-display="bodoni"]    { --ff-display: "Bodoni Moda", Georgia, serif; --ff-display-style: normal; --ff-display-weight: 500; --ff-display-tracking: -0.015em; }
body[data-display="syne"]      { --ff-display: "Syne", "Inter", sans-serif; --ff-display-style: normal; --ff-display-weight: 700; --ff-display-tracking: -0.02em; }
body[data-display="space-gro"] { --ff-display: "Space Grotesk", "Inter", sans-serif; --ff-display-style: normal; --ff-display-weight: 500; --ff-display-tracking: -0.02em; }
body[data-display="unbounded"] { --ff-display: "Unbounded", "Inter", sans-serif; --ff-display-style: normal; --ff-display-weight: 500; --ff-display-tracking: -0.02em; }
body[data-display="major-mono"]{ --ff-display: "Major Mono Display", ui-monospace, monospace; --ff-display-style: normal; --ff-display-weight: 400; --ff-display-tracking: 0; }
body[data-display="jetbrains"] { --ff-display: "JetBrains Mono", ui-monospace, monospace; --ff-display-style: normal; --ff-display-weight: 500; --ff-display-tracking: -0.02em; }

/* Architecture SVG */
.arch-node {
  cursor: pointer;
}
.arch-node rect {
  fill: var(--bg-3);
  stroke: var(--rule-2);
  stroke-width: 1;
  transition: stroke .2s, fill .2s;
}
.arch-node .role { fill: var(--fg); font-family: var(--ff-mono); font-size: 11px; font-weight: 500; letter-spacing: .02em; }
.arch-node .co { fill: var(--fg-3); font-family: var(--ff-mono); font-size: 9px; letter-spacing: .04em; }
.arch-node .when { fill: var(--fg-3); font-family: var(--ff-mono); font-size: 9px; }
.arch-node.active rect { stroke: var(--accent); stroke-width: 1.5; fill: color-mix(in oklch, var(--accent) 10%, var(--bg-2)); }
.arch-node.active .role { fill: var(--accent); }
.arch-node:hover rect { stroke: var(--fg-2); }
.arch-edge { stroke: var(--rule-2); stroke-width: 1; fill: none; transition: stroke .2s; }
.arch-edge.active { stroke: var(--accent); stroke-width: 1.5; }
.arch-tick { fill: var(--fg-3); font-family: var(--ff-mono); font-size: 9px; letter-spacing: .04em; }
.arch-axis { stroke: var(--rule); stroke-width: 1; stroke-dasharray: 2 3; }

/* Fade-in */
.fade-in { opacity: 0; transform: translateY(16px); transition: opacity .7s, transform .7s; }
.fade-in.in { opacity: 1; transform: translateY(0); }

/* Scrollbar */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--rule-2); border-radius: 6px; }
::-webkit-scrollbar-thumb:hover { background: var(--fg-3); }