/* ===========================================================================
   Karthik Javanappa — "agent workspace" design
   Dark-first terminal aesthetic. Inter for humans, JetBrains Mono for machines.
   =========================================================================== */

/* ---------- tokens ---------- */
:root {
  --font-body: "Inter", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;

  --bg: #0a0c10;
  --bg-2: #0e1117;
  --card: #11151c;
  --card-2: #151a22;
  --border: #212936;
  --border-soft: #1a212c;
  --text: #e7ebf2;
  --muted: #8b95a6;
  --faint: #5c6675;

  --accent: #4ade80;           /* terminal green */
  --accent-dim: rgba(74, 222, 128, .12);
  --live: #38bdf8;             /* cyan */
  --live-dim: rgba(56, 189, 248, .12);
  --build: #fbbf24;            /* amber */
  --build-dim: rgba(251, 191, 36, .12);

  --shadow: 0 12px 40px rgba(0, 0, 0, .45);
  --radius: 10px;
  --radius-lg: 14px;
}

[data-theme="light"] {
  --bg: #f7f7f4;
  --bg-2: #efefe9;
  --card: #ffffff;
  --card-2: #fbfbf8;
  --border: #dcdcd2;
  --border-soft: #e6e6dd;
  --text: #1b1f26;
  --muted: #5b6472;
  --faint: #8b93a0;

  --accent: #15803d;
  --accent-dim: rgba(21, 128, 61, .10);
  --live: #0369a1;
  --live-dim: rgba(3, 105, 161, .09);
  --build: #b45309;
  --build-dim: rgba(180, 83, 9, .10);

  --shadow: 0 10px 30px rgba(20, 24, 30, .08);
}

/* ---------- base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16.5px;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  transition: background .25s ease, color .25s ease;
}

/* subtle grid backdrop — the workspace feel */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(color-mix(in srgb, var(--border) 34%, transparent) 1px, transparent 1px),
    linear-gradient(90deg, color-mix(in srgb, var(--border) 34%, transparent) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(ellipse 90% 60% at 50% 0%, black 0%, transparent 72%);
  -webkit-mask-image: radial-gradient(ellipse 90% 60% at 50% 0%, black 0%, transparent 72%);
  z-index: 0;
}

main, .nav, .footer { position: relative; z-index: 1; }

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; }
h1, h2, h3, h4, h5 { line-height: 1.2; margin: 0 0 .5em; font-weight: 700; letter-spacing: -.015em; }
p { margin: 0 0 1em; }
.container { width: min(1120px, 100% - 48px); margin-inline: auto; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

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

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 11px 20px;
  font: 500 14.5px var(--font-mono);
  letter-spacing: -.01em;
  border-radius: 8px;
  border: 1px solid transparent;
  text-decoration: none;
  cursor: pointer;
  transition: transform .15s ease, background .2s ease, border-color .2s ease, color .2s ease;
}
.btn svg { width: 16px; height: 16px; }
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--accent); color: var(--bg); border-color: var(--accent); }
.btn-primary:hover { background: color-mix(in srgb, var(--accent) 84%, white); }
[data-theme="light"] .btn-primary { color: #fff; }
[data-theme="light"] .btn-primary:hover { background: color-mix(in srgb, var(--accent) 86%, black); }
.btn-ghost { background: transparent; color: var(--text); border-color: var(--border); }
.btn-ghost:hover { border-color: var(--muted); background: var(--card); }

.icon-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 38px; height: 38px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  cursor: pointer;
  transition: background .2s ease, border-color .2s ease;
}
.icon-btn:hover { background: var(--card); border-color: var(--muted); }
.icon-btn svg { width: 18px; height: 18px; }

/* ---------- nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 76%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color .25s ease, background .25s ease;
}
.nav.scrolled { border-bottom-color: var(--border-soft); }
.nav-inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; height: 64px; }

.brand {
  font: 700 17px var(--font-mono);
  text-decoration: none;
  display: inline-flex; align-items: baseline; gap: 2px;
  color: var(--text);
}
.brand .prompt { color: var(--accent); }
.brand .caret {
  width: 9px; height: 17px; margin-left: 5px;
  background: var(--accent);
  align-self: center;
  animation: blink 1.1s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }
@media (prefers-reduced-motion: reduce) { .brand .caret, .type-caret { animation: none; } }

.nav-links { display: flex; gap: 4px; position: relative; }
.nav-links a {
  font: 500 14px var(--font-mono);
  color: var(--muted);
  text-decoration: none;
  padding: 8px 13px;
  border-radius: 7px;
  transition: color .2s ease, background .2s ease;
}
.nav-links a::before { content: "./"; color: var(--faint); margin-right: 1px; }
.nav-links a:hover { color: var(--text); background: var(--card); }
.nav-links a.active { color: var(--accent); }
.nav-links a.active::before { color: var(--accent); }

.nav-actions { display: flex; align-items: center; gap: 10px; }
.nav-cta { padding: 9px 16px; }
.nav-toggle { display: none; }

.theme-toggle .moon { display: none; }
[data-theme="light"] .theme-toggle .sun { display: none; }
[data-theme="light"] .theme-toggle .moon { display: block; }

@media (max-width: 860px) {
  .nav-links {
    position: absolute; top: 64px; left: 0; right: 0;
    flex-direction: column;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    padding: 12px 24px 18px;
    display: none;
  }
  .nav-links.open { display: flex; }
  .nav-toggle { display: inline-flex; }
  .nav-cta { display: none; }
}

/* ---------- hero ---------- */
.hero { padding: 72px 0 40px; }
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(260px, .8fr);
  gap: 56px;
  align-items: center;
}

/* terminal window */
.term {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  overflow: hidden;
  margin-bottom: 26px;
}
.term-bar {
  display: flex; align-items: center; gap: 7px;
  padding: 11px 14px;
  background: var(--card-2);
  border-bottom: 1px solid var(--border-soft);
}
.term-dot { width: 11px; height: 11px; border-radius: 50%; }
.term-dot.r { background: #ff5f57; } .term-dot.y { background: #febc2e; } .term-dot.g { background: #28c840; }
.term-title { margin-left: 8px; font: 500 12px var(--font-mono); color: var(--faint); }
.term-body { padding: 20px 22px 18px; font: 400 14.5px/1.9 var(--font-mono); }
.tline { margin: 0; opacity: 0; animation: tin .01s ease forwards; animation-delay: calc(var(--i) * .38s); }
@keyframes tin { to { opacity: 1; } }
@media (prefers-reduced-motion: reduce) { .tline { animation: none; opacity: 1; } }
.tline .tp { color: var(--accent); font-weight: 700; margin-right: 8px; }
.tline.tout { color: var(--muted); }
.tline .st-ok { color: var(--accent); }
.type-caret {
  display: inline-block; width: 9px; height: 15px;
  background: var(--accent); vertical-align: -2px;
  animation: blink 1.1s steps(1) infinite;
}

.hero-lead { font-size: 18px; color: var(--muted); max-width: 56ch; margin-bottom: 26px; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 12px; }

.hero-photo { justify-self: end; }
.frame {
  margin: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--card);
  padding: 10px;
  box-shadow: var(--shadow);
  transform: rotate(1.2deg);
  transition: transform .3s ease;
}
.frame:hover { transform: rotate(0deg); }
.frame img { border-radius: 7px; filter: saturate(.92); }
.frame-tag {
  font: 400 12px var(--font-mono);
  color: var(--faint);
  padding: 9px 4px 1px;
  text-align: center;
}

/* status readout */
.readout {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1px;
  background: var(--border-soft);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  overflow: hidden;
  margin: 56px 0 0;
  padding: 0;
}
.ro { background: var(--card); padding: 18px 20px; margin: 0; }
.ro dt { font: 400 12px var(--font-mono); color: var(--faint); margin-bottom: 4px; }
.ro dd { margin: 0; font: 700 28px/1.1 var(--font-mono); color: var(--text); letter-spacing: -.03em; }

.deployed {
  margin: 22px 0 0;
  font: 400 13px var(--font-mono);
  color: var(--muted);
}
.dep-label { color: var(--faint); margin-right: 10px; }

@media (max-width: 960px) {
  .hero-grid { grid-template-columns: 1fr; gap: 36px; }
  .hero-photo { justify-self: center; max-width: 320px; }
  .readout { grid-template-columns: repeat(2, 1fr); }
  .readout .ro:last-child { grid-column: span 2; }
}

/* ---------- sections ---------- */
.section { padding: 96px 0; }
.section.alt { background: var(--bg-2); border-block: 1px solid var(--border-soft); }

.eyebrow {
  display: inline-block;
  font: 500 13px var(--font-mono);
  color: var(--accent);
  background: var(--accent-dim);
  border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
  border-radius: 6px;
  padding: 5px 11px;
  margin-bottom: 16px;
}
.section-head { max-width: 720px; margin-bottom: 44px; }
.section-head h2 { font-size: clamp(26px, 3.6vw, 38px); }
.section-head p { color: var(--muted); }
.accent-text { color: var(--accent); font-style: normal; }

/* ---------- systems registry ---------- */
.registry {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--card);
  overflow: hidden;
  box-shadow: var(--shadow);
}
.reg-head {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr) 118px 130px 30px;
  gap: 14px;
  padding: 12px 20px;
  background: var(--card-2);
  border-bottom: 1px solid var(--border-soft);
  font: 500 11.5px var(--font-mono);
  color: var(--faint);
  text-transform: lowercase;
}

.sys { border-bottom: 1px solid var(--border-soft); }
.sys:last-child { border-bottom: 0; }
.sys summary {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr) 118px 130px 30px;
  gap: 14px;
  align-items: center;
  padding: 16px 20px;
  cursor: pointer;
  list-style: none;
  transition: background .15s ease;
}
.sys summary::-webkit-details-marker { display: none; }
.sys summary:hover { background: var(--card-2); }
.sys summary:focus-visible { outline: 2px solid var(--accent); outline-offset: -2px; }

.sys-id { font: 500 13px var(--font-mono); color: var(--faint); }
.sys-name { min-width: 0; }
.sys-name b { display: block; font: 600 15.5px var(--font-mono); letter-spacing: -.01em; }
.sys-name small { display: block; color: var(--muted); font-size: 13px; margin-top: 2px; }

.sys-status {
  display: inline-flex; align-items: center; gap: 7px;
  font: 500 12px var(--font-mono);
  padding: 4px 10px;
  border-radius: 999px;
  white-space: nowrap;
  justify-self: start;
}
.sys-status i { width: 7px; height: 7px; border-radius: 50%; background: currentColor; }
.s-shipped { color: var(--accent); background: var(--accent-dim); }
.s-live { color: var(--live); background: var(--live-dim); }
.s-live i, .s-build i { animation: pulse 1.8s ease infinite; }
.s-build { color: var(--build); background: var(--build-dim); }
@keyframes pulse { 50% { opacity: .35; } }
@media (prefers-reduced-motion: reduce) { .s-live i, .s-build i { animation: none; } }

.sys-env { font: 400 12.5px var(--font-mono); color: var(--muted); }
.sys-chev { color: var(--faint); font-size: 13px; text-align: right; transition: transform .2s ease; }
.sys[open] .sys-chev { transform: rotate(90deg); }
.sys[open] summary { background: var(--card-2); }

.sys-body { padding: 6px 20px 24px; }
@media (min-width: 861px) { .sys-body { padding-left: 86px; padding-right: 40px; } }

.pc-tags { display: flex; flex-wrap: wrap; gap: 8px; margin: 8px 0 18px; }
.pc-tags span {
  font: 500 12px var(--font-mono);
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 3px 9px;
}

.pc-pai { display: grid; gap: 12px; margin: 0 0 14px; }
.pc-pai > div {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 14px;
  align-items: baseline;
}
.pc-pai dt {
  font: 500 12px var(--font-mono);
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: .06em;
}
.pc-pai dd { margin: 0; color: var(--text); font-size: 15px; }

.sys-more {
  margin: 0;
  padding: 14px 16px;
  background: var(--bg-2);
  border-left: 2px solid var(--border);
  border-radius: 0 8px 8px 0;
  color: var(--muted);
  font-size: 14.5px;
}

.reg-foot { margin-top: 18px; font: 400 13px var(--font-mono); color: var(--muted); }

@media (max-width: 860px) {
  .reg-head { display: none; }
  .sys summary { grid-template-columns: minmax(0, 1fr) auto; grid-template-areas: "name chev" "status status"; row-gap: 10px; }
  .sys-id { display: none; }
  .sys-name { grid-area: name; }
  .sys-status { grid-area: status; }
  .sys-env { display: none; }
  .sys-chev { grid-area: chev; }
  .pc-pai > div { grid-template-columns: 1fr; gap: 3px; }
}

/* ---------- about ---------- */
.about-grid {
  display: grid;
  grid-template-columns: minmax(260px, .8fr) minmax(0, 1.2fr);
  gap: 64px;
  align-items: center;
}
.about-photo { position: relative; }
.about-photo img {
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  filter: saturate(.92);
}
.badge {
  position: absolute; right: -14px; bottom: 22px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: var(--shadow);
  padding: 12px 16px;
  text-align: center;
}
.badge b { display: block; font: 700 26px var(--font-mono); color: var(--accent); }
.badge span { font: 500 10px var(--font-mono); color: var(--faint); letter-spacing: .1em; }
.about-body p { color: var(--muted); }
.about-body strong { color: var(--text); }

@media (max-width: 860px) {
  .about-grid { grid-template-columns: 1fr; gap: 36px; }
  .about-photo { max-width: 380px; margin-inline: auto; }
}

/* ---------- experience log ---------- */
.joblog {
  list-style: none;
  margin: 0; padding: 0;
  position: relative;
}
.joblog::before {
  content: "";
  position: absolute; top: 8px; bottom: 8px; left: 219px;
  width: 1px;
  background: var(--border);
}
.job {
  display: grid;
  grid-template-columns: 196px minmax(0, 1fr);
  gap: 48px;
  padding: 26px 0;
  position: relative;
}
.job::before {
  content: "";
  position: absolute; left: 215px; top: 36px;
  width: 9px; height: 9px;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--accent);
}
.job-meta { text-align: right; }
.job-date { display: block; font: 500 13px var(--font-mono); color: var(--text); }
.job-loc { display: block; font: 400 12px var(--font-mono); color: var(--faint); margin-top: 3px; }
.job-role { font-size: 18px; margin-bottom: 2px; }
.job-role span { font-weight: 400; color: var(--muted); font-size: 15px; }
.job-org { font: 500 13.5px var(--font-mono); color: var(--accent); margin-bottom: 10px; }
.job-main ul { margin: 0; padding-left: 18px; color: var(--muted); }
.job-main li { margin-bottom: 6px; font-size: 15px; }

@media (max-width: 860px) {
  .joblog::before { left: 4px; }
  .job { grid-template-columns: 1fr; gap: 8px; padding-left: 26px; }
  .job::before { left: 0; top: 8px; }
  .job-meta { text-align: left; display: flex; gap: 14px; align-items: baseline; }
}

/* ---------- education + awards ---------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 72px; }
@media (max-width: 860px) { .split { grid-template-columns: 1fr; gap: 48px; } }

.block-title {
  display: flex; align-items: center; gap: 10px;
  font: 700 19px var(--font-body);
  margin-bottom: 24px;
}
.bt-hash { color: var(--accent); font: 700 17px var(--font-mono); }

.edu-item { margin-bottom: 26px; padding-left: 18px; border-left: 2px solid var(--border); }
.e-date { font: 500 12.5px var(--font-mono); color: var(--faint); }
.edu-item h4 { margin: 5px 0 3px; font-size: 16.5px; }
.e-org { color: var(--muted); font-size: 14.5px; margin-bottom: 9px; }
.e-note { display: flex; flex-wrap: wrap; gap: 8px; }
.pill {
  font: 500 12px var(--font-mono);
  color: var(--accent);
  background: var(--accent-dim);
  border-radius: 6px;
  padding: 3px 10px;
}
.tag-row { display: flex; flex-wrap: wrap; gap: 9px; }
.tag {
  font: 500 13px var(--font-mono);
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 7px;
  padding: 6px 12px;
}

.awards-list { display: grid; gap: 4px; }
.award {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 16px;
  padding: 12px 14px;
  border-radius: 9px;
  transition: background .15s ease;
}
.award:hover { background: var(--card); }
.a-yr { font: 500 13px var(--font-mono); color: var(--accent); }
.award b { display: block; font-size: 15px; }
.award span { color: var(--muted); font-size: 13.5px; }

/* ---------- testimonials ---------- */
.quote-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
@media (max-width: 960px) { .quote-grid { grid-template-columns: 1fr; } }
.quote-card {
  margin: 0;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex; flex-direction: column; gap: 18px;
}
.quote-card blockquote { margin: 0; flex: 1; }
.quote-card blockquote p { color: var(--muted); font-size: 14.5px; margin: 0; }
.quote-card blockquote p::before { content: "“"; color: var(--accent); font-size: 22px; line-height: 0; margin-right: 2px; }
.quote-who { display: flex; align-items: center; gap: 12px; }
.quote-who .av {
  width: 38px; height: 38px;
  display: grid; place-items: center;
  border-radius: 50%;
  background: var(--accent-dim);
  color: var(--accent);
  font: 700 15px var(--font-mono);
}
.quote-who b { display: block; font-size: 14.5px; }
.quote-who div span { color: var(--faint); font-size: 12.5px; }
.q-ok { margin-left: auto; font: 500 11px var(--font-mono); color: var(--accent); }

/* ---------- contact ---------- */
.cv-banner {
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
  box-shadow: var(--shadow);
}
.cv-banner h3 { margin-bottom: 4px; }
.cv-banner p { margin: 0; color: var(--muted); font-size: 15px; }
@media (max-width: 720px) { .cv-banner { flex-direction: column; align-items: flex-start; } }

.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; }
@media (max-width: 860px) { .contact-grid { grid-template-columns: 1fr; gap: 44px; } }

.ci { display: flex; align-items: center; gap: 14px; padding: 11px 0; }
.ci-ico {
  width: 40px; height: 40px; flex: none;
  display: grid; place-items: center;
  border: 1px solid var(--border);
  border-radius: 9px;
  color: var(--accent);
}
.ci-ico svg { width: 18px; height: 18px; }
.ci small { display: block; font: 500 11px var(--font-mono); color: var(--faint); text-transform: uppercase; letter-spacing: .07em; }
.ci a, .ci b { color: var(--text); text-decoration: none; font-size: 15px; }
.ci a:hover { color: var(--accent); }

.ci-copy {
  margin-left: auto;
  display: inline-flex; align-items: center; gap: 6px;
  font: 500 12px var(--font-mono);
  color: var(--muted);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 7px;
  padding: 6px 10px;
  cursor: pointer;
  transition: color .2s ease, border-color .2s ease;
}
.ci-copy:hover { color: var(--text); border-color: var(--muted); }
.ci-copy svg { width: 13px; height: 13px; }
.ci-copy .ci-check-ico, .ci-copy .ci-copied { display: none; }
.ci-copy.copied { color: var(--accent); border-color: var(--accent); }
.ci-copy.copied .ci-copy-ico, .ci-copy.copied .ci-copy-label { display: none; }
.ci-copy.copied .ci-check-ico, .ci-copy.copied .ci-copied { display: inline; }

.contact-form {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow);
}
.field { margin-bottom: 18px; }
.field label { display: block; font: 500 12px var(--font-mono); color: var(--muted); margin-bottom: 7px; }
.field input, .field textarea {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font: 400 15px var(--font-body);
  padding: 11px 13px;
  transition: border-color .2s ease;
}
.field textarea { min-height: 120px; resize: vertical; }
.field input:focus, .field textarea:focus { outline: none; border-color: var(--accent); }
.form-note { margin: 12px 0 0; font-size: 13px; color: var(--faint); }

/* ---------- footer ---------- */
.footer { border-top: 1px solid var(--border-soft); padding: 56px 0 28px; background: var(--bg); }
.footer-top { display: flex; justify-content: space-between; gap: 48px; flex-wrap: wrap; margin-bottom: 40px; }
.footer-brand { max-width: 340px; }
.footer-brand .brand { margin-bottom: 10px; display: inline-flex; }
.footer-brand p { color: var(--muted); font-size: 14px; }
.footer-cols { display: flex; gap: 72px; }
.footer-col h5 { font: 500 12px var(--font-mono); color: var(--faint); margin-bottom: 14px; }
.footer-col a { display: block; color: var(--muted); text-decoration: none; font-size: 14px; margin-bottom: 9px; }
.footer-col a:hover { color: var(--accent); }
.footer-bottom {
  border-top: 1px solid var(--border-soft);
  padding-top: 22px;
  display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap;
}
.footer-bottom p { margin: 0; font: 400 12.5px var(--font-mono); color: var(--faint); }
.footer-social { display: flex; gap: 12px; }
.footer-social a { color: var(--muted); }
.footer-social a:hover { color: var(--accent); }
.footer-social svg { width: 18px; height: 18px; }

/* ---------- to top ---------- */
.to-top {
  position: fixed; right: 24px; bottom: 92px;
  width: 42px; height: 42px;
  display: grid; place-items: center;
  border-radius: 9px;
  background: var(--card);
  border: 1px solid var(--border);
  color: var(--text);
  opacity: 0; pointer-events: none;
  transition: opacity .25s ease;
  z-index: 40;
}
.to-top.show { opacity: 1; pointer-events: auto; }
.to-top svg { width: 17px; height: 17px; }

/* ---------- reveal ---------- */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity .55s ease, transform .55s ease; }
.reveal[data-delay="1"] { transition-delay: .1s; }
.reveal[data-delay="2"] { transition-delay: .2s; }
.reveal[data-delay="3"] { transition-delay: .3s; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; transition: none; } }

/* ---------- chat widget ---------- */
.chat { position: fixed; right: 24px; bottom: 24px; z-index: 60; }
.chat-fab {
  display: inline-flex; align-items: center; gap: 9px;
  font: 600 14px var(--font-mono);
  background: var(--accent);
  color: var(--bg);
  border: none;
  border-radius: 999px;
  padding: 12px 20px;
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: transform .15s ease;
}
[data-theme="light"] .chat-fab { color: #fff; }
.chat-fab:hover { transform: translateY(-2px); }
.chat-fab svg { width: 18px; height: 18px; }

.chat-panel[hidden] { display: none; }
.chat-panel {
  position: absolute; right: 0; bottom: 62px;
  width: min(380px, calc(100vw - 48px));
  height: 480px;
  display: flex; flex-direction: column;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.chat-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 16px;
  background: var(--card-2);
  border-bottom: 1px solid var(--border-soft);
}
.chat-head b { font: 600 14.5px var(--font-mono); display: block; }
.chat-head span { font: 400 12px var(--font-mono); color: var(--faint); }
.chat-close { background: none; border: none; color: var(--muted); cursor: pointer; padding: 4px; }
.chat-close svg { width: 16px; height: 16px; }
.chat-close:hover { color: var(--text); }

.chat-log { flex: 1; overflow-y: auto; padding: 16px; display: flex; flex-direction: column; gap: 10px; }
.chat-msg {
  max-width: 86%;
  padding: 10px 13px;
  border-radius: 11px;
  font-size: 13.5px;
  line-height: 1.55;
  white-space: pre-line;
}
.chat-msg.bot { background: var(--bg-2); border: 1px solid var(--border-soft); align-self: flex-start; border-bottom-left-radius: 4px; }
.chat-msg.user { background: var(--accent-dim); color: var(--text); align-self: flex-end; border-bottom-right-radius: 4px; }

.chat-typing { display: inline-flex; gap: 4px; padding: 3px 0; }
.chat-typing span {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--muted);
  animation: tdot 1.2s ease infinite;
}
.chat-typing span:nth-child(2) { animation-delay: .15s; }
.chat-typing span:nth-child(3) { animation-delay: .3s; }
@keyframes tdot { 30% { transform: translateY(-4px); opacity: .5; } }

.chat-chips { display: flex; flex-wrap: wrap; gap: 7px; padding: 0 16px 10px; }
.chat-chips button {
  font: 500 11.5px var(--font-mono);
  color: var(--accent);
  background: var(--accent-dim);
  border: 1px solid color-mix(in srgb, var(--accent) 26%, transparent);
  border-radius: 999px;
  padding: 5px 11px;
  cursor: pointer;
}
.chat-chips button:hover { border-color: var(--accent); }

.chat-form { display: flex; gap: 8px; padding: 12px 14px; border-top: 1px solid var(--border-soft); }
.chat-form input {
  flex: 1;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font: 400 13.5px var(--font-body);
  padding: 9px 12px;
}
.chat-form input:focus { outline: none; border-color: var(--accent); }
.chat-form button {
  width: 40px;
  display: grid; place-items: center;
  background: var(--accent);
  color: var(--bg);
  border: none;
  border-radius: 8px;
  cursor: pointer;
}
[data-theme="light"] .chat-form button { color: #fff; }
.chat-form button svg { width: 15px; height: 15px; }
.chat-note { margin: 0; padding: 0 14px 12px; font: 400 11px var(--font-mono); color: var(--faint); }

@media (max-width: 560px) {
  .chat-panel { height: min(480px, calc(100vh - 140px)); }
}