/* ————————————————————————————————
   rahultrikha.com — hand-built, no framework
   Palette and type live in the :root variables below.
   ———————————————————————————————— */

* { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #FAF8F3;
  --bg-glass: rgba(250, 248, 243, 0.82);
  --card: #FFFFFF;
  --ink: #201D18;
  --ink-soft: rgba(32, 29, 24, 0.82);
  --muted: #6E675C;
  --line: #E6E1D5;
  --line-strong: #D2CBBB;
  --accent: #A34E22;
  --accent-soft: rgba(163, 78, 34, 0.08);
  --glow: rgba(163, 78, 34, 0.07);
  --shadow: 0 1px 2px rgba(32, 29, 24, 0.04), 0 14px 36px -18px rgba(32, 29, 24, 0.22);
  --serif: "Newsreader", Georgia, "Times New Roman", serif;
  --sans: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: ui-monospace, "SF Mono", "Cascadia Mono", Menlo, Consolas, monospace;
}

:root[data-theme="dark"] {
  --bg: #161310;
  --bg-glass: rgba(22, 19, 16, 0.82);
  --card: #1E1A16;
  --ink: #EDE7DC;
  --ink-soft: rgba(237, 231, 220, 0.85);
  --muted: #A69E90;
  --line: #2C2721;
  --line-strong: #403A30;
  --accent: #E08A52;
  --accent-soft: rgba(224, 138, 82, 0.10);
  --glow: rgba(224, 138, 82, 0.05);
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 14px 36px -18px rgba(0, 0, 0, 0.55);
}

/* No-JS visitors still get their preferred scheme */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --bg: #161310;
    --bg-glass: rgba(22, 19, 16, 0.82);
    --card: #1E1A16;
    --ink: #EDE7DC;
    --ink-soft: rgba(237, 231, 220, 0.85);
    --muted: #A69E90;
    --line: #2C2721;
    --line-strong: #403A30;
    --accent: #E08A52;
    --accent-soft: rgba(224, 138, 82, 0.10);
    --glow: rgba(224, 138, 82, 0.05);
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 14px 36px -18px rgba(0, 0, 0, 0.55);
  }
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
}

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

::selection { background: var(--accent-soft); }

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

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

.container {
  max-width: 1060px;
  margin-inline: auto;
  padding-inline: clamp(20px, 5vw, 40px);
}

.mono {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.02em;
}

.skip {
  position: absolute;
  left: -9999px;
  top: 12px;
  z-index: 100;
  background: var(--card);
  border: 1px solid var(--line-strong);
  padding: 8px 14px;
  border-radius: 8px;
}
.skip:focus { left: 12px; }

/* ———— Header ———— */

.site-head {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--bg-glass);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}

.head-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 62px;
}

.wordmark {
  font-family: var(--mono);
  font-size: 0.85rem;
  letter-spacing: 0.04em;
}
.wordmark span { color: var(--accent); }

.site-head nav {
  display: flex;
  align-items: center;
  gap: clamp(14px, 3vw, 28px);
}

.site-head nav a {
  font-size: 0.86rem;
  font-weight: 500;
  color: var(--muted);
  transition: color 0.15s ease;
}
.site-head nav a:hover { color: var(--ink); }

#theme-toggle {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  transition: color 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}
#theme-toggle:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-soft);
}
#theme-toggle svg {
  width: 16px;
  height: 16px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
}
:root[data-theme="light"] .icon-sun { display: none; }
:root[data-theme="light"] .icon-moon { display: block; }
:root[data-theme="dark"] .icon-sun { display: block; }
:root[data-theme="dark"] .icon-moon { display: none; }

/* ———— Hero ———— */

.hero {
  position: relative;
  padding: clamp(76px, 13vh, 132px) 0 84px;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: -220px;
  right: -160px;
  width: 620px;
  height: 620px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--glow), transparent 68%);
  pointer-events: none;
}

.kicker {
  font-family: var(--mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--accent);
  margin-bottom: 20px;
}

h1 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(2.7rem, 7.5vw, 4.5rem);
  line-height: 1.04;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
}

.lede {
  font-size: clamp(1.05rem, 1.8vw, 1.2rem);
  color: var(--ink-soft);
  max-width: 34em;
}

.hero-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 36px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 0.86rem;
  font-weight: 500;
  padding: 10px 18px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: var(--ink);
  transition: color 0.15s ease, border-color 0.15s ease, background 0.15s ease,
    transform 0.15s ease;
}
.btn:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-soft);
  transform: translateY(-1px);
}
.btn span { font-size: 0.8em; }

.btn-solid {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--bg);
}
.btn-solid:hover {
  color: var(--bg);
  background: var(--accent);
  filter: brightness(1.08);
}

/* ———— Sections ———— */

.section {
  border-top: 1px solid var(--line);
  padding: 76px 0;
}

.sec-head { margin-bottom: 44px; }

.label {
  display: block;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--accent);
  margin-bottom: 14px;
}

h2 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(1.7rem, 3.4vw, 2.3rem);
  letter-spacing: -0.01em;
  line-height: 1.15;
}
h2 em { font-style: italic; }

.sec-sub {
  margin-top: 14px;
  color: var(--muted);
  max-width: 58ch;
  font-size: 0.98rem;
}
.sec-sub strong { color: var(--ink); font-weight: 600; }

/* ———— Project cards ———— */

.grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.card {
  display: block;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 0;
  overflow: hidden;
  transition: transform 0.22s ease, box-shadow 0.22s ease, border-color 0.22s ease;
}
.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow);
  border-color: var(--line-strong);
}

.card-media {
  display: block;
}
.card-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border-bottom: 1px solid var(--line);
  background: var(--bg);
}

.card-body {
  padding: 22px 24px 24px;
}

.card-top {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 14px;
}

.glyph {
  flex: none;
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: var(--accent-soft);
  color: var(--accent);
}
.glyph svg {
  width: 22px;
  height: 22px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.card h3 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 1.35rem;
  line-height: 1.2;
}

.card-url {
  color: var(--muted);
  font-size: 0.72rem;
}
.card:hover .card-url { color: var(--accent); }

.card p {
  font-size: 0.93rem;
  color: var(--muted);
  line-height: 1.65;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
  list-style: none;
}
.tags li {
  font-family: var(--mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 4px 10px;
}

.pipeline {
  margin-top: 28px;
  color: var(--muted);
  font-size: 0.78rem;
}
.cursor {
  animation: blink 1.2s steps(1) infinite;
  color: var(--accent);
}
@keyframes blink { 50% { opacity: 0; } }

/* ———— About ———— */

.bio p {
  max-width: 62ch;
  font-size: 1.02rem;
  color: var(--ink-soft);
  margin-bottom: 18px;
}

.elsewhere {
  list-style: none;
  margin-top: 40px;
  border-top: 1px solid var(--line);
}

.elsewhere a {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding: 16px 4px;
  border-bottom: 1px solid var(--line);
  transition: padding-left 0.18s ease, background 0.18s ease;
}
.elsewhere a:hover {
  padding-left: 12px;
  background: var(--accent-soft);
}

.where {
  font-size: 0.95rem;
  font-weight: 500;
}
.where small {
  display: block;
  font-weight: 400;
  font-size: 0.8rem;
  color: var(--muted);
}
.elsewhere a:hover .where { color: var(--accent); }

.handle {
  color: var(--muted);
  font-size: 0.78rem;
}
.elsewhere a:hover .handle { color: var(--accent); }

/* ———— Footer ———— */

.site-foot {
  border-top: 1px solid var(--line);
  padding: 36px 0 52px;
}
.foot-inner {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  color: var(--muted);
  font-size: 0.75rem;
}
.site-foot a { color: var(--muted); }
.site-foot a:hover { color: var(--accent); }

/* ———— 404 ———— */

.notfound {
  max-width: 720px;
  margin-inline: auto;
  padding: clamp(90px, 18vh, 160px) clamp(20px, 5vw, 40px);
}
.notfound h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  margin-bottom: 16px;
}
.notfound p { color: var(--muted); }
.notfound a { color: var(--accent); }
.notfound a:hover { text-decoration: underline; }

/* ———— Reveal animation (JS adds .in when scrolled into view) ———— */

.js .reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.55s ease, transform 0.55s ease;
  transition-delay: var(--d, 0ms);
}
.js .reveal.in {
  opacity: 1;
  transform: none;
}

/* ———— Responsive ———— */

@media (max-width: 740px) {
  .grid { grid-template-columns: 1fr; }
  .section { padding: 60px 0; }
}

@media (max-width: 480px) {
  .site-head nav a { font-size: 0.8rem; }
  .head-inner { height: 56px; }
  html { scroll-padding-top: 72px; }
}

/* ———— Reduced motion ———— */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .js .reveal { opacity: 1; transform: none; }
  .cursor { animation: none; }
}