/* ------------------------------------------------------------------
   Gaurav Kumar — AI Architect portfolio
   Editorial light theme. No framework, no build step.
   ------------------------------------------------------------------ */

:root {
  --paper: #fbf9f5;
  --paper-warm: #f5f1ea;
  --card: #ffffff;
  --ink: #14110d;
  --ink-soft: #4a443c;
  --ink-faint: #8a8177;
  --rule: #e4ded2;
  --rule-strong: #cfc7b7;
  --accent: #a8431c;
  --accent-wash: #f6ece6;
  --serif: "Newsreader", Georgia, "Times New Roman", serif;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", "Cascadia Code", "JetBrains Mono", Menlo, Consolas, monospace;
  --maxw: 1120px;
  --radius: 4px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5.5rem;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a {
  color: var(--accent);
  text-decoration: none;
  text-underline-offset: 0.18em;
  text-decoration-thickness: 1px;
}

a:hover {
  text-decoration: underline;
}

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

h1,
h2,
h3 {
  font-family: var(--serif);
  font-weight: 500;
  line-height: 1.15;
  letter-spacing: -0.012em;
  margin: 0 0 0.5em;
}

h4 {
  margin: 0 0 0.6em;
}

p {
  margin: 0 0 1.1em;
}

code {
  font-family: var(--mono);
  font-size: 0.85em;
  background: var(--paper-warm);
  border: 1px solid var(--rule);
  border-radius: 3px;
  padding: 0.08em 0.36em;
}

.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: 2rem;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--ink);
  color: var(--paper);
  padding: 0.6rem 1rem;
  z-index: 200;
}

.skip-link:focus {
  left: 0;
}

/* ---------------------------------------------------------- nav ---- */

.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(251, 249, 245, 0.88);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--rule);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  height: 4rem;
}

.nav-brand {
  font-family: var(--serif);
  font-size: 1.15rem;
  font-weight: 500;
  color: var(--ink);
  white-space: nowrap;
  letter-spacing: -0.01em;
}

.nav-brand:hover {
  text-decoration: none;
  color: var(--accent);
}

.nav-links {
  display: flex;
  gap: 1.75rem;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 0.83rem;
  letter-spacing: 0.03em;
  overflow-x: auto;
  scrollbar-width: none;
}

.nav-links::-webkit-scrollbar {
  display: none;
}

.nav-links a {
  color: var(--ink-soft);
  white-space: nowrap;
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
}

.nav-links a:hover,
.nav-links a.is-active {
  color: var(--ink);
  border-bottom-color: var(--accent);
  text-decoration: none;
}

/* --------------------------------------------------------- hero ---- */

.hero {
  padding: 7rem 0 5rem;
  border-bottom: 1px solid var(--rule);
}

.hero-eyebrow {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.75rem;
}

.hero h1 {
  font-size: clamp(3rem, 8vw, 5.5rem);
  font-weight: 400;
  letter-spacing: -0.03em;
  margin-bottom: 0.2em;
}

.hero-role {
  font-family: var(--serif);
  font-size: clamp(1.15rem, 2.6vw, 1.6rem);
  font-style: italic;
  color: var(--ink-soft);
  font-weight: 400;
  margin-bottom: 1.5rem;
}

.hero-role .sep {
  color: var(--rule-strong);
  margin-inline: 0.45rem;
  font-style: normal;
}

.hero-pitch {
  font-size: 1.15rem;
  color: var(--ink-soft);
  max-width: 58ch;
  margin-bottom: 2.5rem;
}

.hero-pitch strong {
  color: var(--ink);
  font-weight: 600;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.6rem 1.25rem;
  border-radius: 100px;
  border: 1px solid var(--rule-strong);
  background: transparent;
  color: var(--ink);
  font-family: var(--sans);
  font-size: 0.87rem;
  font-weight: 500;
  cursor: pointer;
  transition: border-color 0.18s, background 0.18s, color 0.18s;
}

.btn:hover {
  text-decoration: none;
  border-color: var(--ink);
  background: var(--card);
}

.btn-primary {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper);
}

.btn-primary:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.btn svg {
  width: 0.95rem;
  height: 0.95rem;
  fill: currentColor;
  flex: none;
}

/* ----------------------------------------------------- sections ---- */

.section {
  padding: 6rem 0;
  border-bottom: 1px solid var(--rule);
}

.section-head {
  margin-bottom: 3.5rem;
  max-width: 70ch;
}

.section-num {
  display: block;
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.25rem;
}

.section h2 {
  font-size: clamp(2rem, 4.5vw, 3rem);
  font-weight: 400;
  margin-bottom: 0.5rem;
}

.section-sub {
  color: var(--ink-soft);
  font-size: 1.05rem;
  margin: 0;
}

.prose {
  max-width: 66ch;
  color: var(--ink-soft);
}

.prose strong {
  color: var(--ink);
  font-weight: 600;
}

.prose ul {
  padding-left: 1.15rem;
}

.prose li {
  margin-bottom: 0.7em;
}

.pull {
  font-family: var(--serif);
  font-size: clamp(1.4rem, 3vw, 1.9rem);
  font-style: italic;
  line-height: 1.35;
  color: var(--ink);
  border-left: 2px solid var(--accent);
  padding: 0.35em 0 0.35em 1.5rem;
  margin: 3rem 0 0;
  max-width: 30ch;
}

/* ------------------------------------------------------- pillars --- */

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 0;
  margin-top: 3rem;
  border-top: 1px solid var(--rule);
}

.card {
  padding: 2rem 2rem 2rem 0;
  border-right: 1px solid var(--rule);
}

.card:last-child {
  border-right: 0;
}

.card:not(:first-child) {
  padding-left: 2rem;
}

.card h3 {
  font-size: 1.3rem;
  font-weight: 500;
  margin-bottom: 0.6rem;
}

.card p {
  color: var(--ink-soft);
  font-size: 0.95rem;
  margin: 0;
}

.card-icon {
  display: block;
  font-family: var(--serif);
  font-size: 2.4rem;
  line-height: 1;
  color: var(--rule-strong);
  margin-bottom: 1rem;
}

/* ------------------------------------------------------ timeline --- */

.timeline {
  list-style: none;
  margin: 1.75rem 0 0;
  padding: 0;
  max-width: 62ch;
}

.timeline li {
  display: grid;
  grid-template-columns: 11rem 1fr;
  gap: 0.25rem 2rem;
  padding: 1.5rem 0;
  border-top: 1px solid var(--rule);
}

.timeline li:last-child {
  border-bottom: 1px solid var(--rule);
}

.tl-when {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  color: var(--ink-faint);
  padding-top: 0.35rem;
  text-transform: uppercase;
}

.tl-role {
  font-family: var(--serif);
  font-size: 1.25rem;
  color: var(--ink);
}

.tl-org {
  color: var(--accent);
  font-size: 0.88rem;
}

.tl-note {
  color: var(--ink-soft);
  font-size: 0.92rem;
  margin-top: 0.4rem;
}

.timeline li:first-child .tl-when {
  color: var(--accent);
}

/* -------------------------------------------------------- notice --- */

.notice {
  border-left: 2px solid var(--rule-strong);
  background: var(--paper-warm);
  padding: 1.15rem 1.4rem;
  font-size: 0.92rem;
  color: var(--ink-soft);
  margin: 2rem 0 2.5rem;
  max-width: 72ch;
}

.notice strong {
  color: var(--ink);
}

/* --------------------------------------------------- case studies -- */

.case {
  border-top: 1px solid var(--rule);
}

.case:last-of-type {
  border-bottom: 1px solid var(--rule);
}

.case > summary {
  padding: 2.25rem 0;
  cursor: pointer;
  list-style: none;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1rem 2rem;
  align-items: center;
  transition: opacity 0.18s;
}

.case > summary::-webkit-details-marker {
  display: none;
}

.case > summary:hover {
  opacity: 0.62;
}

.case-kicker {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

.case-title {
  font-family: var(--serif);
  font-size: clamp(1.5rem, 3vw, 2.05rem);
  font-weight: 400;
  margin: 0 0 0.5rem;
  color: var(--ink);
}

.case-line {
  color: var(--ink-soft);
  font-size: 0.98rem;
  margin: 0;
  max-width: 62ch;
}

.case-toggle {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-faint);
  border: 1px solid var(--rule-strong);
  border-radius: 100px;
  padding: 0.45rem 1rem;
  white-space: nowrap;
}

.case[open] .case-toggle {
  color: var(--accent);
  border-color: var(--accent);
}

.case[open] .case-toggle::after {
  content: " \2212";
}

.case:not([open]) .case-toggle::after {
  content: " +";
}

.case-body {
  padding: 0 0 3.5rem;
  max-width: 74ch;
}

.case-body h4 {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin: 2.75rem 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--rule);
}

.case-body h4:first-child {
  margin-top: 0;
}

.case-body p,
.case-body li {
  color: var(--ink-soft);
  font-size: 1rem;
}

.case-body strong {
  color: var(--ink);
  font-weight: 600;
}

.case-body em {
  color: var(--ink);
}

.case-body ul {
  margin: 0 0 1em;
  padding-left: 1.15rem;
}

.case-body li {
  margin-bottom: 0.9em;
}

.case-body li::marker {
  color: var(--rule-strong);
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 1.75rem;
}

.chip {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--ink-soft);
  background: var(--paper-warm);
  border-radius: 3px;
  padding: 0.25rem 0.6rem;
}

.chip-scope {
  color: var(--accent);
  background: var(--accent-wash);
}

/* Diagram frame */
.diagram {
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 2rem 1.25rem;
  margin: 0 0 0.9rem;
  overflow-x: auto;
  text-align: center;
}

.diagram svg {
  max-width: 100%;
  height: auto;
}

.diagram-caption {
  font-size: 0.83rem;
  color: var(--ink-faint);
  text-align: center;
  font-style: italic;
  margin: 0 0 2rem;
}

/* --------------------------------------------------------- repos --- */

.repo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.repo {
  display: flex;
  flex-direction: column;
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 1.9rem;
  transition: border-color 0.18s, transform 0.18s;
}

.repo:hover {
  border-color: var(--ink);
  transform: translateY(-3px);
  text-decoration: none;
}

.repo-name {
  font-family: var(--mono);
  font-size: 0.9rem;
  color: var(--accent);
  margin-bottom: 0.75rem;
  word-break: break-word;
}

.repo-desc {
  color: var(--ink-soft);
  font-size: 0.93rem;
  flex: 1;
  margin-bottom: 1.25rem;
}

.repo-meta {
  font-size: 0.72rem;
  color: var(--ink-faint);
  font-family: var(--mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* ------------------------------------------------------ speaking --- */

.talk {
  display: grid;
  grid-template-columns: 11rem 1fr;
  gap: 2rem;
  padding: 2rem 0;
  border-top: 1px solid var(--rule);
  max-width: 72ch;
}

.talk:last-of-type {
  border-bottom: 1px solid var(--rule);
}

.talk-when {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-faint);
  padding-top: 0.4rem;
}

.talk h3 {
  font-size: 1.3rem;
  font-weight: 500;
  margin-bottom: 0.3rem;
}

.talk p {
  color: var(--ink-soft);
  font-size: 0.95rem;
  margin: 0;
}

.talk-venue {
  color: var(--accent) !important;
  font-size: 0.85rem !important;
  margin-bottom: 0.6rem !important;
}

/* ------------------------------------------------------- contact --- */

.contact {
  text-align: center;
  padding: 7rem 0;
  background: var(--paper-warm);
}

.contact h2 {
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  font-weight: 400;
  margin-top: 1rem;
}

.contact .prose {
  margin-inline: auto;
  max-width: 52ch;
  font-size: 1.05rem;
}

.contact .cta-row {
  justify-content: center;
  margin-top: 2.5rem;
}

.footer {
  padding: 2.5rem 0;
  color: var(--ink-faint);
  font-size: 0.82rem;
}

.footer .wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: space-between;
}

/* -------------------------------------------------------- resume --- */

.resume-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  padding: 3rem 0 0;
}

.rdoc {
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: clamp(2rem, 5vw, 4rem);
  margin: 2rem 0 5rem;
}

.rhead {
  border-bottom: 1px solid var(--ink);
  padding-bottom: 1.5rem;
  margin-bottom: 2.25rem;
}

.rhead h1 {
  font-size: clamp(2.2rem, 5vw, 3rem);
  font-weight: 400;
  margin-bottom: 0.1em;
}

.rhead .rtitle {
  font-family: var(--serif);
  font-style: italic;
  font-size: 1.15rem;
  color: var(--accent);
  margin-bottom: 0.9rem;
}

.rcontact {
  font-size: 0.85rem;
  color: var(--ink-soft);
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1.5rem;
}

.rsection {
  margin-bottom: 2.75rem;
}

.rsection > h2 {
  font-family: var(--mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-faint);
  border-bottom: 1px solid var(--rule);
  padding-bottom: 0.5rem;
  margin-bottom: 1.4rem;
}

.rsection p,
.rsection li {
  font-size: 0.96rem;
  color: var(--ink-soft);
}

.rsection strong {
  color: var(--ink);
  font-weight: 600;
}

.rsection ul {
  margin: 0;
  padding-left: 1.15rem;
}

.rsection li {
  margin-bottom: 0.6em;
}

.rsection li::marker {
  color: var(--rule-strong);
}

.rjob {
  margin-bottom: 2rem;
}

.rjob-head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.25rem 1.5rem;
  margin-bottom: 0.7rem;
}

.rjob-role {
  font-family: var(--serif);
  font-size: 1.2rem;
  color: var(--ink);
}

.rjob-when {
  font-family: var(--mono);
  font-size: 0.76rem;
  letter-spacing: 0.05em;
  color: var(--ink-faint);
  text-transform: uppercase;
}

.rskills {
  display: grid;
  grid-template-columns: 11rem 1fr;
  gap: 0.9rem 1.5rem;
  font-size: 0.93rem;
}

.rskills dt {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-faint);
  padding-top: 0.25rem;
}

.rskills dd {
  margin: 0;
  color: var(--ink-soft);
}

/* Placeholder content the owner still has to fill in. */
.todo {
  border: 1px dashed var(--accent);
  background: var(--accent-wash);
  border-radius: var(--radius);
  padding: 0.8rem 1.1rem;
  color: var(--accent) !important;
  font-size: 0.88rem !important;
  margin-bottom: 1rem;
}

@media (max-width: 720px) {
  body {
    font-size: 16px;
  }

  .wrap {
    padding-inline: 1.35rem;
  }

  .hero {
    padding: 4rem 0 3.5rem;
  }

  .section,
  .contact {
    padding: 3.75rem 0;
  }

  .grid-3 {
    grid-template-columns: 1fr;
  }

  .card {
    padding: 1.75rem 0;
    border-right: 0;
    border-bottom: 1px solid var(--rule);
  }

  .card:not(:first-child) {
    padding-left: 0;
  }

  .case > summary {
    grid-template-columns: 1fr;
    padding: 1.75rem 0;
    align-items: start;
  }

  .case-toggle {
    justify-self: start;
  }

  .talk,
  .timeline li,
  .rskills {
    grid-template-columns: 1fr;
    gap: 0.4rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* ---------------------------------------------------------- print -- */

@media print {
  body {
    background: #fff;
    color: #000;
    font-size: 10.5pt;
    line-height: 1.42;
  }

  .nav,
  .resume-actions,
  .footer,
  .no-print {
    display: none !important;
  }

  .rdoc {
    border: 0;
    padding: 0;
    margin: 0;
    background: #fff;
  }

  .wrap {
    max-width: none;
    padding: 0;
  }

  .rsection,
  .rjob {
    break-inside: avoid;
  }

  .rsection {
    margin-bottom: 1.2rem;
  }

  a {
    color: #000;
    text-decoration: none;
  }

  .rhead .rtitle,
  .rsection > h2 {
    color: #000;
  }

  .todo {
    border: 1px dashed #999;
    background: #fff;
    color: #555 !important;
  }

  @page {
    margin: 14mm;
  }
}