/* Портфолио Артёма Зенкова.
   Мобильный вид — базовый, десктоп добавляется медиа-запросами.
   Анимаций ровно две: reveal при появлении и hover. */

:root {
  --bg:        #0d0e10;
  --bg-alt:    #131417;
  --surface:   #17191d;
  --line:      #26292f;
  --text:      #eceef1;
  --muted:     #9aa1ab;
  --accent:    #d8a24a;
  --accent-dim:#8a6a33;

  --sans: "Inter Tight", -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  --gap:  clamp(1.25rem, 4vw, 2rem);
  --pad:  clamp(1.25rem, 5vw, 6rem);
  --rad:  14px;
}

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

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: clamp(1rem, 0.97rem + 0.15vw, 1.075rem);
  line-height: 1.65;
  overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }

a { color: inherit; }

h1, h2, h3 { line-height: 1.12; letter-spacing: -0.02em; margin: 0; font-weight: 600; }

.skip {
  position: absolute; left: -9999px;
  background: var(--accent); color: #14140f;
  padding: 0.75rem 1rem; border-radius: 0 0 var(--rad) 0; z-index: 50;
}
.skip:focus { left: 0; top: 0; }

/* ---------- шапка ---------- */

.topbar {
  display: flex; align-items: center; justify-content: space-between;
  gap: 1rem; flex-wrap: wrap;
  padding: 1.15rem var(--pad);
  border-bottom: 1px solid var(--line);
}

.topbar__name {
  font-family: var(--mono);
  font-size: 0.85rem; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--text);
}

.topbar__nav { display: flex; gap: clamp(0.85rem, 3vw, 1.75rem); flex-wrap: wrap; }

.topbar__nav a {
  font-size: 0.9rem; color: var(--muted); text-decoration: none;
  padding: 0.35rem 0; transition: color 0.25s ease;
}
.topbar__nav a:hover, .topbar__nav a:focus-visible { color: var(--accent); }

/* ---------- герой ---------- */

.hero { padding: clamp(3rem, 11vw, 7.5rem) var(--pad) clamp(2.5rem, 8vw, 5rem); max-width: 1180px; }

.eyebrow {
  font-family: var(--mono);
  font-size: clamp(0.7rem, 0.66rem + 0.2vw, 0.8rem);
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--accent); margin: 0 0 1.5rem;
}

.hero__title {
  font-size: clamp(2.1rem, 1.35rem + 3.6vw, 4.6rem);
  font-weight: 600; margin-bottom: 1.75rem;
}

.hero__lead {
  max-width: 46rem; color: var(--muted);
  font-size: clamp(1.02rem, 0.98rem + 0.22vw, 1.2rem);
  margin: 0 0 2.25rem;
}

.hero__actions { display: flex; flex-wrap: wrap; gap: 0.85rem; margin-bottom: clamp(2.75rem, 7vw, 4.5rem); }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 48px; padding: 0 1.5rem;
  border: 1px solid var(--line); border-radius: 999px;
  font-size: 0.95rem; font-weight: 500; text-decoration: none;
  transition: border-color 0.25s ease, background-color 0.25s ease, color 0.25s ease;
}
.btn:hover, .btn:focus-visible { border-color: var(--accent); color: var(--accent); }

.btn--primary { background: var(--accent); border-color: var(--accent); color: #14140f; }
.btn--primary:hover, .btn--primary:focus-visible { background: #e8bd6d; border-color: #e8bd6d; color: #14140f; }

.facts {
  display: grid; grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.5rem 1rem; margin: 0; padding-top: 2rem;
  border-top: 1px solid var(--line);
}
.facts__item { margin: 0; }
.facts dt {
  font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--muted); margin-bottom: 0.4rem;
}
.facts dd { margin: 0; font-size: clamp(1.05rem, 1rem + 0.3vw, 1.3rem); font-weight: 600; }

/* ---------- секции ---------- */

.section { padding: clamp(3rem, 9vw, 6.5rem) var(--pad); }
.section--alt { background: var(--bg-alt); }

.section__title {
  font-size: clamp(1.6rem, 1.2rem + 1.8vw, 2.6rem);
  margin-bottom: 1rem;
}

.section__note { max-width: 44rem; color: var(--muted); margin: 0 0 clamp(2rem, 6vw, 3.5rem); }
.section__note--tight { margin-top: clamp(1.75rem, 5vw, 2.5rem); margin-bottom: 0; }

/* ---------- кейсы ---------- */

.case {
  display: grid; gap: clamp(1.25rem, 4vw, 2.5rem);
  padding-bottom: clamp(2.5rem, 7vw, 4.5rem);
  margin-bottom: clamp(2.5rem, 7vw, 4.5rem);
  border-bottom: 1px solid var(--line);
}
.case:last-child { border-bottom: 0; margin-bottom: 0; padding-bottom: 0; }

.case__shot {
  display: block; border-radius: var(--rad); overflow: hidden;
  border: 1px solid var(--line); background: var(--surface);
  transition: border-color 0.3s ease;
}
.case__shot:hover, .case__shot:focus-visible { border-color: var(--accent-dim); }
.case__shot img { width: 100%; }

.case__kicker {
  font-family: var(--mono); font-size: 0.74rem; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--accent); margin: 0 0 0.65rem;
}

.case__title { font-size: clamp(1.35rem, 1.1rem + 1.1vw, 2rem); margin-bottom: 0.9rem; }

.case__text { color: var(--muted); margin: 0 0 1.25rem; max-width: 40rem; }

.case__link {
  font-family: var(--mono); font-size: 0.85rem; color: var(--accent);
  text-decoration: none; border-bottom: 1px solid var(--accent-dim);
  padding-bottom: 2px; display: inline-block; min-height: 24px;
}
.case__link:hover, .case__link:focus-visible { border-bottom-color: var(--accent); }

.case__meta { font-size: 0.88rem; color: var(--muted); margin: 0; font-style: italic; }

.case--code .case__body--wide { max-width: 52rem; }

.tags { list-style: none; display: flex; flex-wrap: wrap; gap: 0.5rem; padding: 0; margin: 0 0 1.25rem; }
.tags li {
  font-family: var(--mono); font-size: 0.75rem;
  border: 1px solid var(--line); border-radius: 999px;
  padding: 0.3rem 0.7rem; color: var(--muted);
}

/* ---------- карточки ---------- */

.grid { display: grid; gap: var(--gap); }

.card {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--rad); padding: clamp(1.25rem, 3.5vw, 1.85rem);
  transition: border-color 0.3s ease;
}
.card:hover { border-color: var(--accent-dim); }
.card__title { font-size: clamp(1.08rem, 1rem + 0.4vw, 1.25rem); margin-bottom: 0.75rem; }
.card__text { color: var(--muted); margin: 0 0 1.1rem; font-size: 0.97rem; }

/* ---------- стек ---------- */

.stack { display: grid; gap: var(--gap); }
.stack__col { border-top: 2px solid var(--accent-dim); padding-top: 1.1rem; }
.stack__head { font-size: 1.05rem; margin-bottom: 0.6rem; }
.stack__col p { color: var(--muted); margin: 0; font-size: 0.97rem; }

/* ---------- контакты ---------- */

.contacts { list-style: none; padding: 0; margin: 0; display: grid; gap: 1rem; max-width: 34rem; }
.contacts li {
  display: flex; flex-wrap: wrap; align-items: baseline; gap: 0.5rem 1rem;
  border-bottom: 1px solid var(--line); padding-bottom: 1rem;
}
.contacts__label {
  font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--muted); min-width: 6.5rem;
}
.contacts a {
  color: var(--text); text-decoration: none;
  border-bottom: 1px solid var(--accent-dim); padding-bottom: 2px;
  min-height: 24px; transition: color 0.25s ease;
}
.contacts a:hover, .contacts a:focus-visible { color: var(--accent); }

/* ---------- подвал ---------- */

.footer {
  padding: 2rem var(--pad); border-top: 1px solid var(--line);
  color: var(--muted); font-size: 0.85rem;
}
.footer p { margin: 0; }

/* ---------- reveal ---------- */

.reveal { opacity: 0; transform: translateY(18px); }
.reveal.is-visible {
  opacity: 1; transform: none;
  transition: opacity 0.6s ease, transform 0.6s ease;
}

/* ---------- планшет ---------- */

@media (min-width: 700px) {
  .facts { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .stack { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

/* ---------- десктоп ---------- */

@media (min-width: 1000px) {
  .case { grid-template-columns: 1.15fr 1fr; align-items: center; }
  .case--flip .case__shot { order: 2; }
  .case--code { grid-template-columns: 1fr; }
  .grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .stack { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .section, .hero { max-width: 1280px; margin-inline: auto; }
}

/* ---------- доступность ---------- */

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

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