/* ============================================================
   selyaev.ru — тёмная техничная тема
   ============================================================ */

:root {
  --bg: #0b0e14;
  --surface: #111622;
  --surface-2: #151b2a;
  --line: rgba(148, 163, 184, 0.14);
  --line-strong: rgba(148, 163, 184, 0.28);
  --text: #e8ecf4;
  --muted: #8b94a7;
  --accent: #ffb224;
  --accent-soft: rgba(255, 178, 36, 0.14);
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: ui-monospace, "Cascadia Mono", Consolas, "JetBrains Mono", monospace;
}

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

html {
  scroll-behavior: smooth;
  background: var(--bg);
}

body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* чертёжная сетка на фоне */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(148, 163, 184, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 184, 0.045) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 120% 90% at 50% 0%, #000 40%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 120% 90% at 50% 0%, #000 40%, transparent 100%);
}

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

a { color: inherit; text-decoration: none; }
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

img, video { max-width: 100%; display: block; }

.mono { font-family: var(--mono); }

.container {
  max-width: 1080px;
  margin-inline: auto;
  padding-inline: 24px;
}

/* ============ header ============ */

.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(11, 14, 20, 0.82);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  height: 60px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  white-space: nowrap;
}

.brand-mark {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--accent);
  border: 1px solid var(--accent);
  padding: 3px 7px;
  letter-spacing: 0.08em;
}

.brand-name { font-size: 0.95rem; }

.site-nav {
  display: flex;
  gap: 20px;
  margin-left: auto;
}

.site-nav a {
  font-size: 0.85rem;
  color: var(--muted);
  transition: color 0.2s;
}

.site-nav a:hover { color: var(--text); }

.lang-switch {
  font-family: var(--mono);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  border: 1px solid var(--line-strong);
  padding: 5px 12px;
  color: var(--muted);
  transition: color 0.2s, border-color 0.2s;
}

.lang-switch:hover { color: var(--accent); border-color: var(--accent); }

@media (max-width: 900px) {
  .site-nav { display: none; }
  .lang-switch { margin-left: auto; }
}

/* ============ hero ============ */

.hero {
  padding-top: 60px;
  min-height: 92vh;
  display: flex;
  align-items: center;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 56px;
  align-items: center;
  width: 100%;
}

.kicker {
  font-family: var(--mono);
  font-size: 0.85rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 20px;
}

.hero h1 {
  font-size: clamp(3rem, 8.5vw, 5.4rem);
  line-height: 1.02;
  letter-spacing: -0.02em;
  font-weight: 750;
  text-transform: uppercase;
  margin-bottom: 24px;
}

.hero-sub {
  font-size: 1.12rem;
  color: var(--muted);
  max-width: 46ch;
  margin-bottom: 36px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 32px;
}

.hero-status {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--muted);
  letter-spacing: 0.06em;
}

/* фото в «чертёжной» рамке */
.frame {
  position: relative;
  border: 1px solid var(--line-strong);
}

.frame::before,
.frame::after {
  content: "";
  position: absolute;
  width: 26px;
  height: 26px;
  pointer-events: none;
}

.frame::before {
  top: -2px; left: -2px;
  border-top: 2px solid var(--accent);
  border-left: 2px solid var(--accent);
}

.frame::after {
  bottom: -2px; right: -2px;
  border-bottom: 2px solid var(--accent);
  border-right: 2px solid var(--accent);
}

.hero-photo {
  aspect-ratio: 4 / 5;
  overflow: hidden;
}

.hero-photo img {
  position: absolute;
  inset: 0;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 50% 18%; /* кадр 2:3 в рамке 4:5 — держим лицо в кадре */
}

.photo-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  font-size: 0.85rem;
  letter-spacing: 0.2em;
  background:
    repeating-linear-gradient(45deg,
      transparent 0 22px,
      rgba(148, 163, 184, 0.06) 22px 23px);
}

@media (max-width: 820px) {
  .hero { min-height: auto; padding-top: 100px; padding-bottom: 40px; }
  .hero-grid { grid-template-columns: 1fr; gap: 36px; }
  .hero-photo { max-width: 320px; }
}

/* ============ кнопки ============ */

.btn {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.88rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  padding: 13px 24px;
  background: var(--accent);
  color: var(--bg);
  border: 1px solid var(--accent);
  transition: transform 0.15s, box-shadow 0.15s;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 22px rgba(255, 178, 36, 0.25);
}

.btn-ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--line-strong);
}

.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: none;
}

/* ============ секции ============ */

.section { padding-block: 96px; }

.section > .container > * { scroll-margin-top: 80px; }
section[id] { scroll-margin-top: 64px; }

.sec-head {
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin-bottom: 48px;
}

.sec-num {
  font-family: var(--mono);
  font-size: 0.95rem;
  color: var(--accent);
}

.sec-num::after { content: " /"; color: var(--muted); }

.sec-head h2 {
  font-size: clamp(1.5rem, 3.2vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  text-transform: uppercase;
}

.sec-line {
  flex: 1;
  height: 1px;
  background: var(--line);
  transform: translateY(-6px);
}

.sec-note {
  color: var(--muted);
  margin: -28px 0 36px;
  font-size: 0.95rem;
}

@media (max-width: 820px) {
  .section { padding-block: 64px; }
}

/* ============ обо мне ============ */

.about-grid {
  display: grid;
  grid-template-columns: 1.4fr 0.6fr;
  gap: 56px;
}

.about-text p { margin-bottom: 16px; font-size: 1.05rem; }
.about-text p:last-child { margin-bottom: 0; color: var(--muted); }

.about-facts div {
  border-top: 1px solid var(--line);
  padding: 14px 0;
}

.about-facts dt {
  font-family: var(--mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
  margin-bottom: 4px;
}

.about-facts dd { font-size: 0.98rem; }

@media (max-width: 820px) {
  .about-grid { grid-template-columns: 1fr; gap: 36px; }
}

/* ============ опыт ============ */

.timeline { list-style: none; }

.timeline-item {
  display: grid;
  grid-template-columns: 170px 1fr;
  gap: 28px;
  padding: 26px 0;
  border-top: 1px solid var(--line);
}

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

.tl-period {
  font-size: 0.85rem;
  color: var(--accent);
  padding-top: 3px;
  white-space: nowrap;
}

.tl-body h3 { font-size: 1.12rem; font-weight: 650; margin-bottom: 6px; }

.tl-org { color: var(--muted); font-weight: 400; }

.tl-body p { color: var(--muted); font-size: 0.97rem; max-width: 62ch; }

@media (max-width: 640px) {
  .timeline-item { grid-template-columns: 1fr; gap: 8px; }
}

/* ============ карточки (проекты) ============ */

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

.card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--line);
  padding: 26px;
  transition: border-color 0.2s, transform 0.2s;
}

.card::before {
  content: "";
  position: absolute;
  top: -1px; left: -1px;
  width: 20px; height: 20px;
  border-top: 2px solid var(--accent);
  border-left: 2px solid var(--accent);
  opacity: 0;
  transition: opacity 0.2s;
}

.card:hover { border-color: var(--line-strong); transform: translateY(-3px); }
.card:hover::before { opacity: 1; }

.card-index {
  display: block;
  font-size: 0.75rem;
  color: var(--muted);
  letter-spacing: 0.1em;
  margin-bottom: 14px;
}

.card h3 { font-size: 1.1rem; font-weight: 650; margin-bottom: 10px; }

.card p { color: var(--muted); font-size: 0.95rem; margin-bottom: 18px; }

.card-link {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--accent);
  margin: -8px 0 18px;
}

.card-link:hover { text-decoration: underline; }

@media (max-width: 720px) {
  .cards-grid { grid-template-columns: 1fr; }
}

/* ============ теги ============ */

.tags {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tags li {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--muted);
  border: 1px solid var(--line);
  padding: 4px 10px;
  border-radius: 3px;
}

/* ============ компетенции ============ */

.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.skill-group {
  border: 1px solid var(--line);
  background: var(--surface);
  padding: 24px;
}

.skill-group h3 {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 0.08em;
  margin-bottom: 16px;
}

@media (max-width: 820px) {
  .skills-grid { grid-template-columns: 1fr; }
}

/* ============ публикации (LinkedIn) ============ */

.posts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
  gap: 20px;
  margin-bottom: 36px;
}

.post-card {
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--line);
  transition: border-color 0.2s, transform 0.2s;
}

.post-card:hover { border-color: var(--line-strong); transform: translateY(-3px); }

.post-media { position: relative; border-bottom: 1px solid var(--line); }

.post-media img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.post-media video {
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #000;
}

.post-media .video-badge {
  position: absolute;
  top: 10px; right: 10px;
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  background: rgba(11, 14, 20, 0.85);
  border: 1px solid var(--line-strong);
  color: var(--text);
  padding: 4px 9px;
}

.post-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  flex: 1;
  gap: 12px;
}

.post-date {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--muted);
  letter-spacing: 0.06em;
}

.post-text {
  font-size: 0.94rem;
  color: var(--text);
  white-space: pre-line;
  display: -webkit-box;
  -webkit-line-clamp: 6;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.post-card.expanded .post-text {
  display: block;
  -webkit-line-clamp: none;
}

.post-expand {
  align-self: flex-start;
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--accent);
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}

.post-expand:hover { text-decoration: underline; }

.post-link {
  margin-top: auto;
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--muted);
  letter-spacing: 0.04em;
  transition: color 0.2s;
}

.post-link:hover { color: var(--accent); }

.posts-empty {
  grid-column: 1 / -1;
  border: 1px dashed var(--line-strong);
  padding: 32px;
  text-align: center;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.85rem;
}

.posts-more { text-align: center; }

/* ============ контакты ============ */

.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.contact-item {
  display: block;
  border: 1px solid var(--line);
  background: var(--surface);
  padding: 22px;
  transition: border-color 0.2s, transform 0.2s;
}

.contact-item:hover { border-color: var(--accent); transform: translateY(-3px); }

.contact-label {
  display: block;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--accent);
  margin-bottom: 8px;
}

.contact-value { font-size: 1rem; word-break: break-all; }

@media (max-width: 820px) {
  .contact-grid { grid-template-columns: 1fr; }
}

/* ============ футер ============ */

.site-footer {
  border-top: 1px solid var(--line);
  padding: 30px 0;
  margin-top: 40px;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  font-size: 0.8rem;
  color: var(--muted);
}

/* ============ появление при скролле ============ */

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.reveal.on {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .btn, .card, .post-card, .contact-item { transition: none; }
}