/* Mikhail Simakhov, personal site. Plain CSS, no framework. */

:root {
  color-scheme: light dark;
  --bg: #F5F2EF;
  --tint: #EFEBE6;
  --ink: #1A1A1A;
  --muted: #6E675F;
  --accent: #A8420A;
  --line: #E0DAD2;
  --card: #F7F4F1;
  --soft: #F0E7DC;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #17130F;
    --tint: #1C1712;
    --ink: #EDE6DB;
    --muted: #A69A89;
    --accent: #F0914E;
    --line: #2D2721;
    --card: #201B15;
    --soft: #262019;
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }
[id] { scroll-margin-top: 5rem; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; animation: none !important; }
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.wrap-wide {
  max-width: 72rem;
  margin: 0 auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}
.wrap-narrow {
  max-width: 46rem;
  margin: 0 auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

/* ---------- links & buttons ---------- */

a { color: var(--accent); text-decoration: none; }

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

.skip-link {
  position: absolute;
  left: 0.5rem;
  top: -3rem;
  z-index: 100;
  background: var(--accent);
  color: #fff;
  padding: 0.6rem 1rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: top 140ms ease;
}
.skip-link:focus { top: 0.5rem; }
@media (prefers-color-scheme: dark) {
  .skip-link { color: #17130F; }
}

.btn {
  display: inline-block;
  padding: 0.7em 1.5em;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  line-height: 1.2;
  white-space: nowrap;
  border: 1px solid transparent;
  font-family: inherit;
  cursor: pointer;
  transition: opacity 120ms ease;
}
.btn:hover { opacity: 0.85; }
.btn-accent { background: var(--accent); color: #fff; }
.btn-dark { background: var(--ink); color: var(--bg); }
.btn-outline { border: 1px solid var(--line); color: var(--ink); background: transparent; }
@media (prefers-color-scheme: dark) {
  .btn-accent { color: #17130F; }
  .btn-outline { border-color: var(--muted); }
}

.quiet-link { color: var(--ink); font-weight: 600; }
.quiet-link:hover { color: var(--accent); }
.quiet-link.accent { color: var(--accent); }

/* ---------- top bar (sticky, like the reference) ---------- */

.topbar {
  position: sticky;
  top: 0;
  z-index: 40;
  border-bottom: 1px solid var(--line);
  background: var(--bg);
}
.bar {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding-top: 0.7rem;
  padding-bottom: 0.7rem;
}
.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--ink);
  font-weight: 700;
}
.brand img { border-radius: 50%; display: block; }
.topnav {
  display: flex;
  gap: 1.5rem;
  margin-left: auto;
}
.topnav a { color: var(--muted); font-weight: 500; font-size: 0.95rem; }
.topnav a:hover { color: var(--ink); }
.topnav a.active { color: var(--ink); font-weight: 700; }
@media (max-width: 56rem) {
  .bar { flex-wrap: wrap; row-gap: 0.25rem; }
  .bar > .btn { margin-left: auto; }
  .topbar { position: static; }
  .topnav { order: 3; width: 100%; margin-left: 0; flex-wrap: wrap; gap: 0 1.1rem; }
  .topnav a { white-space: nowrap; padding: 0.5rem 0; }
}
@media (max-width: 30rem) {
  .brand span { display: none; }
}

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

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
  gap: 3rem;
  align-items: center;
  padding-top: 5rem;
  padding-bottom: 5rem;
}

.kicker {
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  margin: 0 0 1rem;
}

h1 {
  font-size: clamp(2.1rem, 7vw, 3.75rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.05;
  margin: 0 0 1.25rem;
}

.lead {
  font-size: 1.1875rem;
  color: var(--muted);
  max-width: 34rem;
  margin: 0 0 1.75rem;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.social {
  list-style: none;
  display: flex;
  gap: 0.35rem;
  padding: 0;
  margin: 0 0 1.75rem;
  margin-left: -0.6rem;
}
.social a {
  color: var(--muted);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
}
.social a:hover { color: var(--accent); }

.stats {
  display: flex;
  gap: 2rem;
  border-top: 1px solid var(--line);
  padding-top: 1.5rem;
  max-width: 34rem;
}
.stat + .stat {
  border-left: 1px solid var(--line);
  padding-left: 2rem;
}
.stat strong {
  display: block;
  font-size: 1.75rem;
  font-weight: 800;
  letter-spacing: -0.01em;
}
.stat span {
  display: block;
  line-height: 1.35;
  margin-top: 0.3rem;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.hero-photo img {
  display: block;
  width: min(100%, 320px);
  height: auto;
  margin: 0 auto;
  border-radius: 50%;
  border: 1px solid var(--line);
  box-shadow: 0 18px 44px rgba(26, 20, 12, 0.14);
}

@media (max-width: 46rem) {
  .hero { grid-template-columns: 1fr; gap: 2rem; padding-top: 2.5rem; padding-bottom: 3rem; }
  .hero-photo { order: -1; }
  .hero-photo img { width: 168px; margin: 0; }
  .stats { gap: 1.25rem; max-width: none; }
  .stat { flex: 1 1 0; min-width: 0; }
  .stat + .stat { padding-left: 1.25rem; }
}
@media (max-width: 26rem) {
  .stats { gap: 0.75rem; }
  .stat + .stat { padding-left: 0.75rem; }
  .stat span { letter-spacing: 0.04em; }
}
@media (max-width: 22rem) {
  .stats { flex-direction: column; gap: 0.9rem; }
  .stat + .stat { border-left: 0; padding-left: 0; border-top: 1px solid var(--line); padding-top: 0.9rem; }
}

/* ---------- section bands (border-t rhythm like the reference) ---------- */

.band {
  border-top: 1px solid var(--line);
  padding-top: clamp(4rem, 8vw, 7rem);
  padding-bottom: clamp(4rem, 8vw, 7rem);
}
.band.tinted { background: var(--tint); }

.centered { text-align: center; }
.centered .sub { margin-left: auto; margin-right: auto; }

h2 {
  font-size: clamp(1.9rem, 4.5vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.015em;
  line-height: 1.12;
  margin: 0 0 1rem;
}
h2.quote { font-size: clamp(1.6rem, 4vw, 2.4rem); }

.sub {
  color: var(--muted);
  font-size: 1.0625rem;
  max-width: 40rem;
  margin: 0 0 2.25rem;
}

h3 { font-size: 1.2rem; font-weight: 700; margin: 0.35rem 0 0.6rem; }

.label {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
}
p.label { margin: 0; }

.cta-row { display: flex; align-items: center; gap: 1.25rem; flex-wrap: wrap; }
.centered-row { display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 0.75rem 1.25rem; margin-top: 0.5rem; }
p.centered-row { margin-bottom: 0; }

.now { list-style: none; padding: 0; margin: 2rem 0 0; }
.now li { border-top: 1px solid var(--line); padding: 1rem 0; }
.now p { margin: 0.25rem 0 0; color: var(--muted); }

.fineprint {
  color: var(--muted);
  font-size: 0.875rem;
  margin: 1.25rem 0 0;
}
.dot {
  display: inline-block;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: #3E9B4F;
  margin-right: 0.5rem;
}

/* ---------- cards ---------- */

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}

/* ---------- writing ---------- */

.writing-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 3.5rem;
  align-items: center;
}
.writing-pitch { text-align: left; }
.writing-pitch .sub { margin-bottom: 1.75rem; }
.writing-cards { display: grid; gap: 1.25rem; }
.wcard {
  display: block;
  color: var(--ink);
  padding: 1.4rem 1.6rem;
  transition: border-color 120ms ease;
}
.wcard:hover { border-color: var(--accent); transform: translateY(-3px); }
.wcard .label { display: block; color: var(--muted); margin-bottom: 0.4rem; }
.wtitle { display: block; font-weight: 700; font-size: 1.08rem; line-height: 1.35; margin-bottom: 0.35rem; }
.wdesc { display: block; color: var(--muted); font-size: 0.92rem; line-height: 1.55; }
@media (max-width: 52rem) {
  .writing-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .writing-pitch { order: -1; }
}

/* ---------- projects grid ---------- */

.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(19rem, 100%), 1fr));
  gap: 1.5rem;
  text-align: left;
  margin-top: 2.5rem;
}
.pcard { overflow: hidden; display: flex; flex-direction: column; }
.pcard:hover {
  transform: translateY(-6px);
  border-color: var(--accent);
  box-shadow: 0 16px 38px rgba(26, 20, 12, 0.14);
}
@media (prefers-color-scheme: dark) {
  .pcard:hover { box-shadow: 0 16px 40px rgba(0, 0, 0, 0.5); }
}
.pimg {
  background: var(--soft);
  border-bottom: 1px solid var(--line);
  padding: 1rem;
  overflow: hidden;
  aspect-ratio: 9 / 5;
  display: flex;
  align-items: center;
  justify-content: center;
}
.pimg svg, .pimg img { transition: transform 220ms ease; }
.pcard:hover .pimg svg,
.pcard:hover .pimg img { transform: scale(1.03); }
.pimg svg { display: block; width: 100%; height: 100%; }
.pimg-shot { padding: 0; }
.pimg-shot img { display: block; width: 100%; height: 100%; object-fit: cover; object-position: center top; }
.pcard:hover .d-main rect { stroke-width: 2; }
.pbody { padding: 1.4rem 1.6rem 1.6rem; flex: 1 0 auto; display: flex; flex-direction: column; }
.pbody p { color: var(--muted); font-size: 0.95rem; line-height: 1.6; margin: 0.6rem 0 0; }
.pbody p.label { color: var(--accent); margin: 0; font-size: 0.72rem; line-height: 1.5; }
.pbody p.stack { font-size: 0.78rem; line-height: 1.5; }
.pbody h3 { color: var(--ink); }

.stack {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--muted) !important;
  margin-top: 1rem !important;
}

/* diagram nodes (used inside project card images) */
.d-node rect { fill: var(--bg); stroke: var(--muted); stroke-width: 1; }
.d-node text {
  fill: var(--ink);
  font-family: var(--mono);
  font-size: 12.5px;
  text-anchor: middle;
}
.d-main rect { stroke: var(--accent); stroke-width: 1.5; }
.d-arrow { stroke: var(--muted); stroke-width: 1.25; fill: none; }

/* ---------- toolbox ---------- */

.logo-strip {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem 2.5rem;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--card);
  padding: 1.5rem 2rem;
  margin: 0 auto 2.25rem;
  max-width: 56rem;
}
.logo-strip span {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--muted);
  transition: color 160ms ease;
}
.logo-strip:hover span { color: var(--ink); }

/* ---------- about ---------- */

#about .sub { margin-bottom: 1.75rem; }

/* ---------- daily stack ---------- */

.stack-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(13rem, 100%), 1fr));
  gap: 1.5rem;
  margin-top: 2.5rem;
  text-align: center;
}
.scard { padding: 2rem 1.75rem; }
.scard:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
  box-shadow: 0 14px 32px rgba(26, 20, 12, 0.12);
}
@media (prefers-color-scheme: dark) {
  .scard:hover { box-shadow: 0 14px 34px rgba(0, 0, 0, 0.45); }
}
.scard p { color: var(--muted); font-size: 0.95rem; line-height: 1.6; margin: 0.4rem 0 1rem; }
.sicon { color: var(--ink); margin-bottom: 0.75rem; transition: color 180ms ease, transform 180ms ease; }
.sicon svg { display: inline-block; }
.scard:hover .sicon { color: var(--accent); transform: scale(1.08); }

/* ---------- 404 ---------- */

.notfound {
  max-width: 40rem;
  width: 100%;
  margin: 0 auto;
  flex: 1 0 auto;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 4rem 1.5rem;
}
.notfound h1 { margin-bottom: 1.25rem; }
.notfound .lead { margin-bottom: 2rem; }

/* ---------- footer ---------- */

footer { border-top: 1px solid var(--line); }
.foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 1.25rem;
  padding-bottom: 1.25rem;
  flex-wrap: wrap;
}
.foot p { font-size: 0.875rem; color: var(--muted); margin: 0; }
.social-compact { margin: 0; }
.social-compact a { width: 44px; height: 44px; }

/* ---------- newsletter page ---------- */

.nl-hero { padding-top: 2rem; }
.nl-face {
  border-radius: 50%;
  border: 1px solid var(--line);
  margin-bottom: 1rem;
}
.nl-form {
  display: flex;
  gap: 0.6rem;
  justify-content: center;
  flex-wrap: wrap;
  margin: 1.75rem auto 0.75rem;
  max-width: 30rem;
}
.nl-form input[type="email"] {
  flex: 1 1 14rem;
  min-width: 0;
  padding: 0.85rem 1.1rem;
  font: inherit;
  color: var(--ink);
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
}
.nl-form input[type="email"]::placeholder { color: var(--muted); }
.nl-form .btn { flex: 0 0 auto; }
.nl-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(13rem, 100%), 1fr));
  gap: 1.25rem;
  margin-top: 2rem;
  text-align: left;
}
.nlcard { padding: 1.5rem; }
.nlcard h3 { margin: 0 0 0.5rem; }
.nlcard p { margin: 0; color: var(--muted); }
p.card-links { margin-top: 0.9rem; display: flex; gap: 1rem; flex-wrap: wrap; }
.project-grid.single { max-width: 36rem; margin-left: auto; margin-right: auto; }
.nlcard p.label { color: var(--accent); margin-bottom: 0.35rem; }

/* ---------- layout polish (2026-10-22) ---------- */

body > main { flex: 1 0 auto; }

h1, h2, h3, .kicker, .label, .wtitle { text-wrap: balance; }
p, li { text-wrap: pretty; }
.nw { white-space: nowrap; }
.now .quiet-link { white-space: nowrap; }

.pbody > p:last-child:not(.stack) { margin-top: auto; padding-top: 0.9rem; }

/* stack lines: each tool stays whole */
.stack { display: flex; flex-wrap: wrap; gap: 0.1rem 0.9rem; }
.stack span { white-space: nowrap; }

/* project grids: 1, 2 or 3 columns; a lone last card is centred instead of leaving a hole */
.project-grid:not(.single) { grid-template-columns: minmax(0, 1fr); }
@media (min-width: 44rem) {
  .project-grid:not(.single) { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .project-grid:not(.single) > * { grid-column: span 2; }
  .project-grid:not(.single) > :last-child:nth-child(odd) { grid-column: 2 / span 2; }
}
@media (min-width: 66rem) {
  .project-grid:not(.single) { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .project-grid:not(.single) > *,
  .project-grid:not(.single) > :last-child:nth-child(odd) { grid-column: span 2; }
  .project-grid:not(.single) > :nth-last-child(2):nth-child(3n+1) { grid-column: 2 / span 2; }
  .project-grid:not(.single) > :last-child:nth-child(3n+1) { grid-column: 3 / span 2; }
}

@media (max-width: 30rem) {
  .bar > .btn { padding: 0.55em 1em; font-size: 0.85rem; }
  .pimg { padding: 0.5rem; }
  .nl-form .btn { flex: 1 1 100%; }
}