/* Hitesh Kaushal - site styles (externalized from index.html to allow a stricter CSP without 'unsafe-inline'). Fonts load via <link> in index.html head. */

:root {
  --bg: #0a0c10;
  --bg-elev: #0f131a;
  --bg-card: #11161e;
  --ink: #ece6d8;
  --ink-soft: #b6b1a5;
  --ink-mute: #86847a; /* WCAG AA: >=4.8:1 on dark backgrounds for small text */
  --rule: rgba(236,230,216,0.08);
  --rule-strong: rgba(236,230,216,0.16);
  --accent: #e8a87c;
  --accent-deep: #d68a5a;
  --accent-tint: rgba(232,168,124,0.14);
  --ok: #7ed4a8;
  --max: 1200px;
  --radius: 16px;
  --ease: cubic-bezier(0.22,1,0.36,1);
}
*, *::before, *::after { box-sizing: border-box; }
*::selection { background: var(--accent-tint); color: var(--ink); }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: 'Inter', system-ui, -apple-system, Segoe UI, sans-serif;
  font-size: 16.5px; line-height: 1.65;
  color: var(--ink); background: var(--bg);
  -webkit-font-smoothing: antialiased; overflow-x: hidden;
}
.bg-aurora {
  position: fixed; inset: 0; pointer-events: none; z-index: 0;
  background:
    radial-gradient(60% 50% at 15% 10%, rgba(232,168,124,0.22) 0%, transparent 60%),
    radial-gradient(50% 45% at 85% 0%, rgba(126,212,168,0.10) 0%, transparent 60%),
    radial-gradient(45% 45% at 50% 95%, rgba(232,168,124,0.10) 0%, transparent 60%);
  filter: blur(20px);
  animation: drift 22s ease-in-out infinite alternate;
}
@keyframes drift { 0% { transform: scale(1); } 100% { transform: translate(-2%,1.5%) scale(1.05); } }
.bg-grid {
  position: fixed; inset: 0; pointer-events: none; z-index: 0;
  background-image:
    linear-gradient(to right, rgba(236,230,216,0.035) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(236,230,216,0.035) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, #000 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, #000 30%, transparent 80%);
}
main, header, footer { position: relative; z-index: 1; }

h1, h2, h3 {
  font-family: 'Fraunces', Georgia, 'Times New Roman', serif;
  font-weight: 400; letter-spacing: -0.018em; line-height: 1.08;
  color: var(--ink); margin: 0 0 0.5em;
}
h2 { font-size: clamp(1.9rem, 3.2vw, 2.6rem); font-weight: 400; letter-spacing: -0.022em; }
h3 { font-size: 1.08rem; font-weight: 500; font-family: 'Inter', sans-serif; letter-spacing: -0.005em; }
p { margin: 0 0 1em; color: var(--ink-soft); }
em { font-style: normal; color: var(--ink); font-weight: 500; }
a { color: var(--accent); text-decoration: none; transition: color 0.15s; }
a:hover { color: var(--ink); }
.mono { font-family: 'JetBrains Mono', 'Cascadia Code', ui-monospace, 'SF Mono', Menlo, monospace; }
.small { font-size: 0.78rem; }
.container { max-width: var(--max); margin: 0 auto; padding: 0 28px; position: relative; }
.narrow { max-width: 760px; }
.center { text-align: center; margin-left: auto; margin-right: auto; }
.u-mb-0 { margin-bottom: 0; }
.u-mb-16 { margin-bottom: 16px; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: saturate(160%) blur(18px);
  -webkit-backdrop-filter: saturate(160%) blur(18px);
  background: rgba(10,12,16,0.72);
  border-bottom: 1px solid var(--rule);
}
.nav {
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
  padding: 14px 28px; max-width: var(--max); margin: 0 auto;
}
.brand { display: flex; align-items: center; gap: 14px; text-decoration: none; }
.brand-mark {
  font-family: 'Fraunces', serif; font-weight: 500; font-size: 1.05rem;
  letter-spacing: 0.06em; background: var(--ink); color: var(--bg);
  padding: 6px 9px; border-radius: 6px;
}
.brand-status {
  font-family: 'JetBrains Mono', monospace; font-size: 0.74rem; color: var(--ink-mute);
  display: inline-flex; align-items: center; gap: 8px;
}
.dot {
  width: 7px; height: 7px; border-radius: 50%; background: var(--ok); flex-shrink: 0;
  box-shadow: 0 0 0 0 rgba(126,212,168,0.6);
  animation: pulse 2.2s ease infinite;
}
@keyframes pulse { 0% { box-shadow: 0 0 0 0 rgba(126,212,168,0.6); } 80%,100% { box-shadow: 0 0 0 9px rgba(126,212,168,0); } }
.nav-links { display: flex; gap: 24px; }
.nav-links a { color: var(--ink-soft); font-size: 0.88rem; font-weight: 400; text-decoration: none; }
.nav-links a:hover { color: var(--ink); }
.kbd-hint {
  background: transparent; border: 1px solid var(--rule-strong);
  color: var(--ink-soft); padding: 6px 10px; border-radius: 8px;
  font-family: 'JetBrains Mono', monospace; font-size: 0.74rem;
  display: inline-flex; align-items: center; gap: 8px; cursor: pointer; transition: all 0.18s;
}
.kbd-hint:hover { color: var(--ink); border-color: var(--accent); }
kbd {
  font-family: 'JetBrains Mono', monospace;
  background: rgba(236,230,216,0.08); border: 1px solid var(--rule-strong);
  border-radius: 4px; padding: 1px 5px; font-size: 0.72rem; color: var(--ink);
}
@media (max-width: 880px) { .nav-links, .brand-status { display: none; } }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 12px 22px; border-radius: 999px;
  font-weight: 500; font-size: 0.92rem; border: 1px solid transparent;
  transition: all 0.22s var(--ease); cursor: pointer; letter-spacing: -0.005em; text-decoration: none;
}
.btn-primary { background: var(--ink); color: var(--bg); }
.btn-primary:hover { background: var(--accent); color: var(--bg); transform: translateY(-1px); box-shadow: 0 10px 30px rgba(232,168,124,0.22); }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--rule-strong); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

/* Hero */
.hero { padding: 88px 0 0; }
.hero-grid { display: grid; grid-template-columns: 1.65fr 1fr; gap: 64px; align-items: end; }
.eyebrow { font-size: 0.78rem; color: var(--accent); margin: 0 0 22px; letter-spacing: 0.02em; }
.caret {
  display: inline-block; width: 7px; height: 14px;
  background: var(--accent); margin-right: 8px; vertical-align: -2px;
  animation: blink 1.1s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }
.display { font-size: clamp(3.4rem, 8vw, 6.8rem); margin: 0; font-weight: 300; letter-spacing: -0.035em; line-height: 0.96; }
.display .line { display: block; }
.gradient-text {
  background: linear-gradient(120deg, var(--ink) 0%, var(--accent) 55%, #d4a57a 100%);
  background-size: 200% 100%;
  -webkit-background-clip: text; background-clip: text; color: transparent;
  animation: shimmer 7s linear infinite;
}
@keyframes shimmer { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }
.lede { font-size: 1.12rem; color: var(--ink-soft); max-width: 38em; margin-top: 22px; }
.hero-cta { display: flex; gap: 12px; margin-top: 28px; flex-wrap: wrap; }
.hero-stats {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 8px; margin: 52px 0 0; padding: 24px 0 0; border-top: 1px solid var(--rule);
}
.hero-stats dt { font-family: 'JetBrains Mono', monospace; font-size: 0.68rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--ink-mute); margin-bottom: 4px; }
.hero-stats dd { margin: 0; font-family: 'Fraunces', serif; font-size: 1.8rem; font-weight: 400; color: var(--ink); letter-spacing: -0.02em; }
.hero-stats .suffix { color: var(--accent); }

.hero-card {
  background: linear-gradient(180deg, var(--bg-card), var(--bg-elev));
  border: 1px solid var(--rule-strong); border-radius: var(--radius); padding: 14px;
  box-shadow: 0 30px 60px -20px rgba(0,0,0,0.6), 0 0 0 1px rgba(232,168,124,0.04) inset;
}
.card-head { display: flex; align-items: center; justify-content: space-between; padding: 4px 8px 12px; color: var(--ink-mute); font-family: 'JetBrains Mono', monospace; font-size: 0.74rem; }
.card-dots { display: inline-flex; gap: 6px; }
.card-dots i { width: 10px; height: 10px; border-radius: 50%; background: rgba(236,230,216,0.1); display: block; }
.card-dots i:nth-child(1) { background: #ff5f57; }
.card-dots i:nth-child(2) { background: #febc2e; }
.card-dots i:nth-child(3) { background: #28c840; }
.photo-frame {
  border-radius: 12px; overflow: hidden; position: relative; aspect-ratio: 1/1;
  background: radial-gradient(120% 90% at 50% 0%, rgba(232,168,124,0.14), transparent 60%), var(--bg-elev);
  border: 1px solid var(--rule);
}
.photo-placeholder {
  position: absolute; inset: 0;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 10px; color: var(--ink-mute);
}
.photo-mono { font-family: 'Fraunces', serif; font-size: 4.6rem; font-weight: 300; color: var(--ink); letter-spacing: 0.02em; }
.photo-placeholder small { font-family: 'JetBrains Mono', monospace; font-size: 0.72rem; letter-spacing: 0.06em; }
.photo-img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: center top; display: block; }
.card-meta { list-style: none; padding: 14px 8px 4px; margin: 0; }
.card-meta li {
  display: flex; justify-content: space-between; align-items: center;
  font-family: 'JetBrains Mono', monospace; font-size: 0.73rem;
  padding: 7px 0; border-bottom: 1px dashed var(--rule); color: var(--ink-mute);
}
.card-meta li:last-child { border-bottom: 0; }
.card-meta li span:last-child { color: var(--ink-soft); }
.card-meta .ok { color: var(--ok); }
@media (max-width: 880px) {
  .hero-grid { grid-template-columns: 1fr; gap: 40px; align-items: start; }
  .hero-stats { grid-template-columns: repeat(2,1fr); row-gap: 18px; }
  .hero-card { order: -1; max-width: 320px; }
}

/* Ticker */
.ticker {
  margin: 72px -28px 0; padding: 18px 0;
  border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule);
  overflow: hidden;
  mask-image: linear-gradient(to right, transparent 0%, #000 8%, #000 92%, transparent 100%);
  -webkit-mask-image: linear-gradient(to right, transparent 0%, #000 8%, #000 92%, transparent 100%);
}
.ticker-track {
  display: inline-flex; gap: 36px; white-space: nowrap;
  animation: tickscroll 38s linear infinite;
  font-family: 'Fraunces', serif; font-size: 1.5rem; color: var(--ink-mute); letter-spacing: -0.01em;
}
.ticker-track .sep { color: var(--accent); }
@keyframes tickscroll { from { transform: translateX(0); } to { transform: translateX(-50%); } }

/* Sections */
.section { padding: 110px 0; }
.section + .section { border-top: 1px solid var(--rule); }
.section-eyebrow { font-family: 'JetBrains Mono', monospace; font-size: 0.74rem; text-transform: lowercase; letter-spacing: 0.04em; color: var(--accent); margin: 0 0 18px; }
.section-head { margin-bottom: 56px; max-width: 700px; }
.two-col { display: grid; grid-template-columns: 1fr 2.4fr; gap: 56px; align-items: start; }
@media (max-width: 880px) { .two-col { grid-template-columns: 1fr; gap: 14px; } }

.pull { margin: 14px 0 26px; padding: 16px 0 16px 22px; border-left: 2px solid var(--accent); }
.pull p { font-family: 'Fraunces', serif; font-size: 1.45rem; line-height: 1.35; color: var(--ink); margin: 0; font-weight: 400; letter-spacing: -0.01em; }

/* Why AI section */
.why-ai-box {
  background: var(--bg-card);
  border: 1px solid var(--rule-strong);
  border-left: 2px solid var(--ok);
  border-radius: var(--radius);
  padding: 32px 36px;
  margin-top: 8px;
}
.why-ai-box p:last-child { margin-bottom: 0; }
.why-ai-tools { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
.tool-chip {
  font-family: 'JetBrains Mono', monospace; font-size: 0.72rem;
  padding: 4px 12px; border-radius: 999px;
  background: rgba(126,212,168,0.08); border: 1px solid rgba(126,212,168,0.2);
  color: var(--ok); letter-spacing: 0.02em;
}

/* Timeline */
.timeline { list-style: none; padding: 0; margin: 0; }
.timeline > li { display: grid; grid-template-columns: 60px 1fr; gap: 28px; padding: 28px 0; border-top: 1px solid var(--rule); }
.timeline > li:first-child { border-top: 0; padding-top: 0; }
.t-badge {
  font-family: 'JetBrains Mono', monospace; font-size: 0.72rem; font-weight: 500;
  width: 52px; height: 52px; border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  background: var(--bg-card); color: var(--accent);
  border: 1px solid var(--rule-strong); letter-spacing: 0.04em; flex-shrink: 0;
}
.t-badge.ai { color: var(--ok); border-color: rgba(126,212,168,0.2); background: rgba(126,212,168,0.06); }
.t-meta { display: flex; gap: 16px; flex-wrap: wrap; color: var(--ink-mute); margin-bottom: 6px; font-family: 'JetBrains Mono', monospace; font-size: 0.72rem; letter-spacing: 0.02em; }
.t-role { color: var(--ink); font-weight: 500; margin: 4px 0 8px; font-size: 0.95rem; }
.t-bullets { list-style: none; padding: 0; margin: 8px 0 0; }
.t-bullets li {
  color: var(--ink-soft); font-size: 0.95rem; padding: 5px 0 5px 16px;
  border-top: 1px solid var(--rule); position: relative;
}
.t-bullets li::before { content: "→"; position: absolute; left: 0; color: var(--accent); font-size: 0.8rem; top: 7px; }
.t-bullets li:first-child { border-top: 0; }

/* Skills */
.skills-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 12px; margin-top: 8px; }
.skill-group { background: var(--bg-card); border: 1px solid var(--rule); border-radius: 10px; padding: 16px 18px; }
.skill-group-label { font-family: 'JetBrains Mono', monospace; font-size: 0.68rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--ink-mute); margin: 0 0 10px; }
.skill-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.skill-tag { font-family: 'JetBrains Mono', monospace; font-size: 0.72rem; padding: 3px 10px; border-radius: 999px; background: rgba(236,230,216,0.06); border: 1px solid var(--rule-strong); color: var(--ink-soft); }

/* Impact */
.impact-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 18px; }
.impact-card {
  position: relative; background: var(--bg-card); border: 1px solid var(--rule);
  border-radius: var(--radius); padding: 28px 26px 68px; overflow: hidden;
  transition: transform 0.3s var(--ease), border-color 0.3s, box-shadow 0.3s;
}
.impact-card.featured { border-color: rgba(126,212,168,0.2); }
.impact-card.featured::after {
  content: "current role"; position: absolute; top: 18px; right: 18px;
  font-family: 'JetBrains Mono', monospace; font-size: 0.62rem; letter-spacing: 0.06em;
  color: var(--ok); background: rgba(126,212,168,0.08); border: 1px solid rgba(126,212,168,0.2);
  padding: 2px 8px; border-radius: 999px;
}
.impact-card::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(80% 100% at 0% 0%, var(--accent-tint), transparent 60%);
  opacity: 0; transition: opacity 0.3s; pointer-events: none;
}
.impact-card:hover { transform: translateY(-3px); border-color: var(--rule-strong); box-shadow: 0 20px 50px -20px rgba(0,0,0,0.5); }
.impact-card:hover::before { opacity: 1; }
.impact-metric {
  font-family: 'Fraunces', serif; font-size: clamp(2.2rem, 3.6vw, 2.8rem);
  font-weight: 300; color: var(--ink); margin: 0 0 12px; line-height: 1; letter-spacing: -0.025em;
}
.impact-metric .suffix { color: var(--accent); font-size: 0.65em; margin-left: 3px; }
.impact-card h3 { margin: 0 0 8px; }
.impact-card p { margin: 0; font-size: 0.93rem; color: var(--ink-soft); }
.card-tag { position: absolute; bottom: 20px; left: 26px; font-family: 'JetBrains Mono', monospace; font-size: 0.68rem; color: var(--ink-mute); letter-spacing: 0.02em; }

/* Patents */
.patents-lede { max-width: 56em; color: var(--ink-soft); margin-bottom: 36px; }
.patents-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 12px; margin-bottom: 28px; }
.patent-card {
  display: block;
  background: var(--bg-elev); border: 1px solid var(--rule); border-left: 2px solid var(--accent);
  border-radius: 10px; padding: 16px 20px;
  text-decoration: none; color: inherit;
  transition: border-left-color 0.2s, transform 0.2s, box-shadow 0.2s;
}
.patent-card:hover { border-left-color: var(--ink); transform: translateX(2px); box-shadow: 0 4px 20px rgba(0,0,0,0.3); }
.patent-id { font-family: 'JetBrains Mono', monospace; font-size: 0.7rem; color: var(--accent); margin: 0 0 4px; letter-spacing: 0.04em; }
.patent-card h3 { margin: 0; font-size: 0.93rem; font-weight: 400; color: var(--ink); }
.pubs { list-style: none; padding: 0; margin: 0; }
.pubs li { padding: 12px 0; border-top: 1px solid var(--rule); display: grid; grid-template-columns: 70px 1fr; gap: 14px; align-items: baseline; color: var(--ink-soft); }
.pubs li:first-child { border-top: 0; }
.pubs li .tag { font-family: 'JetBrains Mono', monospace; font-size: 0.68rem; color: var(--ink-mute); }
.pubs li strong { color: var(--ink); font-weight: 500; }


/* Contact */
.section-contact { padding: 110px 0; }
.contact-grid { display: grid; grid-template-columns: 1fr 1.6fr; gap: 80px; align-items: start; }
@media (max-width: 880px) { .contact-grid { grid-template-columns: 1fr; gap: 40px; } }
.contact-lede { font-size: 1.08rem; color: var(--ink-soft); margin: 12px 0 28px; }
.contact-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.muted { color: var(--ink-mute); margin: 8px 0 0; font-family: 'JetBrains Mono', monospace; font-size: 0.78rem; }

/* Form */
.contact-form {
  background: var(--bg-card); border: 1px solid var(--rule-strong);
  border-radius: var(--radius); padding: 32px;
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-bottom: 14px; }
@media (max-width: 600px) { .form-row { grid-template-columns: 1fr; } }
.form-field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 14px; }
.form-field label { font-family: 'JetBrains Mono', monospace; font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--ink-mute); }
.form-field input,
.form-field textarea {
  background: var(--bg-elev); border: 1px solid var(--rule-strong);
  border-radius: 10px; padding: 12px 16px;
  color: var(--ink); font-family: 'Inter', sans-serif; font-size: 0.95rem;
  outline: none; transition: border-color 0.2s, box-shadow 0.2s;
  resize: none;
}
.form-field input::placeholder,
.form-field textarea::placeholder { color: var(--ink-mute); }
.form-field input:focus,
.form-field textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-tint);
}
.form-field textarea { min-height: 130px; }
.form-submit { width: 100%; justify-content: center; border-radius: 10px; padding: 14px; font-size: 0.95rem; margin-top: 4px; }
.form-status { display: none; margin-top: 14px; padding: 12px 16px; border-radius: 10px; font-family: 'JetBrains Mono', monospace; font-size: 0.78rem; text-align: center; }
.form-status.success { display: block; background: rgba(126,212,168,0.08); border: 1px solid rgba(126,212,168,0.2); color: var(--ok); }
.form-status.error { display: block; background: rgba(232,168,124,0.08); border: 1px solid rgba(232,168,124,0.2); color: var(--accent); }

/* Footer */
.site-footer { border-top: 1px solid var(--rule); padding: 22px 0; background: var(--bg-elev); }
.foot { display: flex; justify-content: space-between; align-items: center; color: var(--ink-mute); font-family: 'JetBrains Mono', monospace; font-size: 0.78rem; }
.foot p { margin: 0; }
.foot-status { display: inline-flex; align-items: center; gap: 8px; }

/* Reveal */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity 0.7s var(--ease), transform 0.7s var(--ease); }
.reveal.in { opacity: 1; transform: translateY(0); }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.001s !important; transition-duration: 0.001s !important; }
  .reveal { opacity: 1; transform: none; }
}

/* Command palette */
.palette { position: fixed; inset: 0; z-index: 100; display: flex; align-items: flex-start; justify-content: center; padding-top: 14vh; }
.palette[hidden] { display: none; }
.palette-backdrop { position: absolute; inset: 0; background: rgba(8,10,14,0.7); backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px); }
.palette-modal {
  position: relative; width: min(560px, 92vw); background: var(--bg-card);
  border: 1px solid var(--rule-strong); border-radius: 14px;
  box-shadow: 0 40px 80px rgba(0,0,0,0.6); overflow: hidden;
  animation: paletteIn 0.18s var(--ease);
}
@keyframes paletteIn { from { opacity: 0; transform: translateY(-8px) scale(0.98); } to { opacity: 1; transform: none; } }
.palette-input {
  width: 100%; background: transparent; border: 0; outline: 0;
  padding: 18px 20px; color: var(--ink); font-family: 'Inter', sans-serif; font-size: 1rem;
  border-bottom: 1px solid var(--rule);
}
.palette-input::placeholder { color: var(--ink-mute); }
.palette-list { list-style: none; padding: 8px; margin: 0; max-height: 320px; overflow-y: auto; }
.palette-list li { display: flex; align-items: center; justify-content: space-between; padding: 10px 14px; border-radius: 8px; cursor: pointer; color: var(--ink-soft); font-size: 0.92rem; }
.palette-list li.active, .palette-list li:hover { background: var(--accent-tint); color: var(--ink); }
.palette-list li .num { font-family: 'JetBrains Mono', monospace; font-size: 0.72rem; color: var(--ink-mute); }
.palette-foot { display: flex; gap: 16px; padding: 10px 16px; border-top: 1px solid var(--rule); color: var(--ink-mute); font-family: 'JetBrains Mono', monospace; font-size: 0.72rem; }
.palette-foot span { display: inline-flex; gap: 5px; align-items: center; }