/* Pulkit Chawla, pulkitchawla.me. Hand-written, no build step. */

:root {
  color-scheme: dark;
  --bg: #0f1210;
  --bg-2: #151a17;
  --bg-3: #1b211d;
  --fg: #e9e7df;
  --fg-2: #cfcdc4;
  --muted: #9a9c93;
  --line: #262d28;
  --line-2: #333c36;
  --accent: #7fe0b0;
  --accent-ink: #0f1210;
  --accent-soft: rgba(127, 224, 176, 0.10);
  --accent-glow: rgba(127, 224, 176, 0.16);
  --shadow: 0 1px 0 rgba(0, 0, 0, 0.4), 0 12px 32px -16px rgba(0, 0, 0, 0.7);
  --display: "Instrument Serif", "Iowan Old Style", "Palatino Linotype", Georgia, serif;
  --text: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --radius: 14px;
  --pad: 20px;
  --max: 1080px;
}

:root[data-theme="light"] {
  color-scheme: light;
  --bg: #f6f5f0;
  --bg-2: #ffffff;
  --bg-3: #f0efe8;
  --fg: #1b1e1c;
  --fg-2: #33372f;
  --muted: #5f645f;
  --line: #dedcd3;
  --line-2: #cfcdc2;
  --accent: #17694a;
  --accent-ink: #ffffff;
  --accent-soft: rgba(23, 105, 74, 0.09);
  --accent-glow: rgba(23, 105, 74, 0.12);
  --shadow: 0 1px 0 rgba(0, 0, 0, 0.03), 0 12px 32px -18px rgba(20, 30, 25, 0.25);
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--text);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a { color: var(--accent); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

h1, h2, h3 { font-weight: 400; margin: 0; line-height: 1.1; }
p { margin: 0 0 1em; }
ul, ol { margin: 0; padding: 0; }
img, svg { max-width: 100%; }
button { font: inherit; color: inherit; }

.wrap { width: 100%; max-width: var(--max); margin: 0 auto; padding-left: var(--pad); padding-right: var(--pad); }

.skip {
  position: absolute; left: 12px; top: -60px;
  background: var(--accent); color: var(--accent-ink);
  padding: 8px 12px; border-radius: 8px; font-weight: 600; z-index: 100;
  text-decoration: none;
}
.skip:focus { top: 12px; }

/* Header */
.top {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.top .wrap { display: flex; align-items: center; gap: 16px; height: 60px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--fg); text-decoration: none; font-weight: 600; letter-spacing: -0.01em; }
.brand .mark { width: 26px; height: 26px; flex: none; }
.brand .mark rect { fill: var(--bg-3); stroke: var(--line-2); stroke-width: 1; }
.brand .mark .brk { stroke: var(--muted); }
.brand .mark .chk { stroke: var(--accent); }
.nav { display: none; margin-left: auto; gap: 4px; }
.nav a {
  color: var(--fg-2); text-decoration: none; font-size: 14px; font-weight: 500;
  padding: 6px 10px; border-radius: 8px;
}
.nav a:hover { color: var(--fg); background: var(--bg-3); }
.nav a[aria-current] { color: var(--fg); box-shadow: inset 0 -2px 0 var(--accent); border-radius: 8px 8px 2px 2px; }
.theme {
  margin-left: auto;
  display: inline-grid; place-items: center;
  width: 38px; height: 38px; border-radius: 10px;
  border: 1px solid var(--line); background: var(--bg-2); cursor: pointer;
}
.theme:hover { border-color: var(--line-2); background: var(--bg-3); }
.theme svg { width: 18px; height: 18px; }
.theme .sun { display: none; }
.theme .moon { display: block; }
:root[data-theme="light"] .theme .sun { display: block; }
:root[data-theme="light"] .theme .moon { display: none; }
.nav + .theme { margin-left: 8px; }

/* Hero */
.hero { position: relative; overflow: hidden; padding: 56px 0 48px; }
.hero::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background:
    radial-gradient(60% 55% at 78% 25%, var(--accent-glow), transparent 70%),
    radial-gradient(40% 40% at 8% 90%, var(--accent-soft), transparent 70%);
}
.hero .wrap { position: relative; display: grid; gap: 36px; }
.eyebrow {
  font-family: var(--mono); font-size: 12.5px; letter-spacing: 0.04em;
  color: var(--muted); margin-bottom: 18px; display: flex; align-items: center; gap: 10px;
}
.eyebrow .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft); }
.hero h1 {
  font-family: var(--display);
  font-size: clamp(3rem, 9vw, 5.4rem);
  letter-spacing: -0.015em;
  line-height: 0.98;
  margin-bottom: 22px;
}
.lede {
  font-size: clamp(1.15rem, 2.3vw, 1.45rem);
  line-height: 1.4;
  color: var(--fg);
  max-width: 30ch;
  margin-bottom: 18px;
  letter-spacing: -0.005em;
}
.lede em { font-family: var(--display); font-style: italic; font-size: 1.12em; color: var(--accent); }
.sub { color: var(--muted); max-width: 52ch; font-size: 1rem; margin-bottom: 28px; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 11px 18px; border-radius: 10px; text-decoration: none; font-weight: 600; font-size: 15px;
  border: 1px solid var(--line-2); color: var(--fg); background: var(--bg-2);
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}
.btn:hover { transform: translateY(-1px); border-color: var(--accent); }
.btn svg { width: 16px; height: 16px; }
.btn.primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.btn.primary:hover { filter: brightness(1.06); }
.actions .quiet { color: var(--muted); font-size: 14px; text-decoration: none; padding: 6px 4px; }
.actions .quiet:hover { color: var(--fg); text-decoration: underline; }

/* Verification log panel */
.panel {
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  font-family: var(--mono);
  font-size: 12.5px;
  line-height: 1.55;
}
.panel-head {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 14px; border-bottom: 1px solid var(--line);
  color: var(--muted); font-size: 12px; white-space: nowrap;
}
.panel-head .title { font-weight: 500; color: var(--fg-2); }
.panel-head .path { display: none; overflow: hidden; text-overflow: ellipsis; }
.panel-head .state {
  margin-left: auto; display: inline-flex; align-items: center; gap: 6px;
  padding: 2px 8px; border-radius: 999px; border: 1px solid var(--line-2); font-size: 11px;
}
.panel-head .state::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--muted); }
.panel-head .state.ok { color: var(--accent); border-color: color-mix(in srgb, var(--accent) 40%, transparent); }
.panel-head .state.ok::before { background: var(--accent); }
.panel-head .replay {
  border: 0; background: transparent; color: var(--muted); cursor: pointer;
  padding: 2px 6px; border-radius: 6px; font-family: var(--mono); font-size: 11px;
}
.panel-head .replay:hover { color: var(--fg); background: var(--bg-3); }
.log { margin: 0; padding: 14px 14px 16px; min-height: 236px; color: var(--fg-2); white-space: pre-wrap; overflow-wrap: anywhere; }
.log .ln { display: grid; grid-template-columns: 9ch 1fr; column-gap: 1ch; }
.log .ln.cmd { color: var(--fg); margin-top: 6px; }
.log .ln.cmd:first-child { margin-top: 0; }
.log .k { color: var(--muted); }
.log .ln.ok .k { color: var(--accent); }
.log .ln.ok .t { color: var(--fg); }
.log .ln.dim .t { color: var(--muted); }
.log .caret { display: inline-block; width: 7px; height: 1.05em; background: var(--accent); vertical-align: -0.15em; margin-left: 2px; animation: blink 1s steps(2, start) infinite; }
@keyframes blink { to { visibility: hidden; } }

/* Sections */
.section { padding: 56px 0; border-top: 1px solid var(--line); scroll-margin-top: 61px; }
.section-head { display: flex; align-items: baseline; gap: 14px; margin-bottom: 28px; }
.section-head .num { font-family: var(--mono); font-size: 12.5px; color: var(--accent); letter-spacing: 0.06em; }
.section h2 { font-family: var(--display); font-size: clamp(2rem, 4.5vw, 2.6rem); letter-spacing: -0.01em; }
.intro { color: var(--fg-2); max-width: 62ch; margin-bottom: 28px; font-size: 1.05rem; }

/* Now */
.facts { display: grid; gap: 0; border: 1px solid var(--line); border-radius: var(--radius); background: var(--bg-2); overflow: hidden; }
.facts > div { padding: 16px 18px; border-bottom: 1px solid var(--line); }
.facts > div:last-child { border-bottom: 0; }
.facts dt { font-family: var(--mono); font-size: 12px; color: var(--muted); letter-spacing: 0.04em; margin-bottom: 4px; }
.facts dd { margin: 0; color: var(--fg); }
.facts .ok { color: var(--accent); font-weight: 500; }

/* Timeline */
.timeline { list-style: none; position: relative; }
.timeline::before { content: ""; position: absolute; left: 5px; top: 8px; bottom: 8px; width: 1px; background: var(--line-2); }
.tl-item { position: relative; padding: 0 0 36px 28px; }
.tl-item:last-child { padding-bottom: 0; }
.tl-item::before {
  content: ""; position: absolute; left: 0; top: 7px; width: 11px; height: 11px; border-radius: 50%;
  background: var(--bg); border: 2px solid var(--line-2);
}
.tl-item.now::before { border-color: var(--accent); background: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft); }
.tl-when { font-family: var(--mono); font-size: 12.5px; color: var(--muted); margin-bottom: 6px; letter-spacing: 0.02em; }
.tl-when b { color: var(--fg); font-weight: 500; }
.tl-item h3 { font-size: 1.15rem; font-weight: 600; letter-spacing: -0.01em; margin-bottom: 2px; }
.tl-org { color: var(--muted); margin-bottom: 12px; font-size: 0.95rem; }
.tl-org a { color: inherit; }
.tl-item ul { list-style: none; display: grid; gap: 8px; color: var(--fg-2); }
.tl-item li { position: relative; padding-left: 16px; }
.tl-item li::before { content: ""; position: absolute; left: 0; top: 0.72em; width: 6px; height: 1px; background: var(--accent); }

/* Projects */
.projects { display: grid; gap: 16px; list-style: none; }
.card {
  position: relative;
  display: flex; flex-direction: column; gap: 12px;
  background: var(--bg-2); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px 22px 20px;
  transition: border-color 180ms ease, transform 180ms ease, box-shadow 180ms ease;
}
.card:hover { border-color: var(--line-2); transform: translateY(-2px); box-shadow: var(--shadow); }
.card-head { display: flex; align-items: flex-start; gap: 12px; }
.card h3 { font-size: 1.25rem; font-weight: 600; letter-spacing: -0.01em; }
.card h3 a { color: var(--fg); text-decoration: none; }
.card h3 a::after { content: ""; position: absolute; inset: 0; }
.card:hover h3 a { color: var(--accent); }
.card .kicker { color: var(--muted); font-size: 0.92rem; margin-top: 2px; }
.card .repo { margin-left: auto; flex: none; color: var(--muted); display: inline-flex; align-items: center; gap: 6px; font-family: var(--mono); font-size: 12px; text-decoration: none; position: relative; z-index: 1; }
.card .repo svg { width: 16px; height: 16px; }
.card .repo:hover { color: var(--accent); }
.card .repo .repo-name { display: none; }
.card p { margin: 0; color: var(--fg-2); }
.card .hard { border-left: 2px solid var(--accent); padding-left: 12px; color: var(--fg-2); }
.card .hard b { color: var(--fg); font-weight: 600; }
.card .stat { font-family: var(--mono); font-size: 12.5px; color: var(--muted); }
.tags { list-style: none; display: flex; flex-wrap: wrap; gap: 6px; margin-top: auto; padding-top: 4px; }
.tags li {
  font-family: var(--mono); font-size: 11.5px; letter-spacing: 0.01em;
  padding: 3px 8px; border-radius: 6px; border: 1px solid var(--line); background: var(--bg-3); color: var(--fg-2);
}

/* Skills */
.skills { display: grid; gap: 22px; }
.skill h3 { font-family: var(--mono); font-size: 12.5px; color: var(--muted); letter-spacing: 0.05em; text-transform: uppercase; margin-bottom: 10px; }
.skill .tags li { font-family: var(--text); font-size: 14px; padding: 5px 11px; }

/* Education */
.edu { display: grid; gap: 16px; list-style: none; }
.edu li { border: 1px solid var(--line); border-radius: var(--radius); background: var(--bg-2); padding: 20px 22px; }
.edu h3 { font-size: 1.15rem; font-weight: 600; letter-spacing: -0.01em; margin-bottom: 2px; }
.edu .school { color: var(--muted); margin-bottom: 10px; }
.edu .grade { font-family: var(--mono); font-size: 12.5px; color: var(--accent); margin-bottom: 8px; }
.edu p { margin: 0; color: var(--fg-2); font-size: 0.97rem; }
.edu p + p { margin-top: 8px; }

/* Contact */
.contact { padding-bottom: 72px; }
.contact .big { font-family: var(--display); font-size: clamp(1.7rem, 5vw, 2.6rem); letter-spacing: -0.01em; line-height: 1.15; margin: 0 0 20px; }
.contact .big a { color: var(--fg); text-decoration: none; border-bottom: 2px solid var(--accent); }
.contact .big a:hover { color: var(--accent); }
.links { list-style: none; display: flex; flex-wrap: wrap; gap: 10px 22px; color: var(--fg-2); }
.links a { color: var(--fg-2); text-decoration: none; display: inline-flex; align-items: center; gap: 7px; }
.links a:hover { color: var(--accent); }
.links svg { width: 16px; height: 16px; }

footer { border-top: 1px solid var(--line); padding: 24px 0 40px; color: var(--muted); font-size: 13.5px; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 8px 20px; justify-content: space-between; }
footer a { color: inherit; }

/* Reveal on scroll (only when JS is on and motion is allowed) */
html.js .reveal { opacity: 0; transform: translateY(14px); transition: opacity 600ms ease, transform 600ms ease; }
html.js .reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  html.js .reveal { opacity: 1; transform: none; transition: none; }
  .btn, .card { transition: none; }
  .btn:hover, .card:hover { transform: none; }
  .log .caret { animation: none; }
}

/* Wider screens */
@media (min-width: 640px) {
  :root { --pad: 28px; }
  .nav { display: flex; }
  .theme { margin-left: 0; }
  .panel-head .path { display: inline; }
  .card .repo .repo-name { display: inline; }
  .facts { grid-template-columns: 1fr 1fr; }
  .facts > div { border-right: 1px solid var(--line); }
  .facts > div:nth-child(2n) { border-right: 0; }
  .facts > div:nth-last-child(-n + 2) { border-bottom: 0; }
  .skills { grid-template-columns: 1fr 1fr; gap: 28px 40px; }
  .edu { grid-template-columns: 1fr 1fr; }
}

@media (min-width: 880px) {
  :root { --pad: 32px; }
  .hero { padding: 76px 0 64px; }
  .hero .wrap { grid-template-columns: 1.1fr 0.9fr; align-items: center; gap: 48px; }
  .panel-head .path { display: inline; }
  .section { padding: 80px 0; }
  .section-head { margin-bottom: 36px; }
  .projects { grid-template-columns: 1fr 1fr; gap: 20px; }
  .timeline::before { left: 150px; }
  .tl-item { display: grid; grid-template-columns: 120px 1fr; gap: 0 44px; padding-left: 0; }
  .tl-item::before { left: 145px; }
  .tl-when { text-align: right; margin: 4px 0 0; }
  .tl-when b { display: block; font-size: 15px; }
}

@media (min-width: 1080px) {
  .timeline::before { left: 170px; }
  .tl-item { grid-template-columns: 140px 1fr; gap: 0 48px; }
  .tl-item::before { left: 165px; }
}

/* Diagrams (18 Sep 2026): one drawn figure per project, and one in the hero, instead of the typed build log. */
.hero-figure { padding: 14px 14px 10px; margin: 0; }
.hero-figure figcaption { font-family: var(--mono); font-size: 11.5px; color: var(--muted); padding: 6px 4px 0; }
.diagram { display: block; width: 100%; height: auto; }
.fig { margin: -6px -6px 2px; padding: 10px 10px 6px; background: var(--bg-3); border: 1px solid var(--line); border-radius: calc(var(--radius) - 4px); }
@media (min-width: 880px) { .projects { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.fig-shot { padding: 0; overflow: hidden; }
.fig-shot img { display: block; width: 100%; height: auto; }
.hero-shot { padding: 0; }
.hero-shot img { display: block; width: 100%; height: auto; border-bottom: 1px solid var(--line); }
.hero-shot figcaption { padding: 8px 12px 10px; }