/* PRISM — студия цифрового дизайна */

:root {
  --bg: #130d1c;
  --bg-section: #1d1428;
  --text: #f5effa;
  --muted: #b9a8cc;
  --muted-soft: #8e7ca3;
  --pink: #ff70c8;
  --violet: #9d70ff;
  --glass: rgba(245, 239, 250, 0.04);
  --glass-strong: rgba(245, 239, 250, 0.07);
  --line: rgba(245, 239, 250, 0.12);
  --line-strong: rgba(157, 112, 255, 0.45);
  --glow-pink: rgba(255, 112, 200, 0.28);
  --glow-violet: rgba(157, 112, 255, 0.28);
  --radius: 1.25rem;
  --radius-sm: 0.85rem;
  --max: 72rem;
  --font: "Segoe UI", "Helvetica Neue", Arial, "Noto Sans", "Liberation Sans", sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

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

a {
  color: inherit;
  text-decoration: none;
}

button,
summary {
  font-family: inherit;
}

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

.skip-link {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 100;
  padding: 0.6rem 1rem;
  background: var(--pink);
  color: #1a0e18;
  border-radius: 0.5rem;
  font-weight: 600;
}

.skip-link:focus {
  top: 1rem;
}

.page-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(ellipse 70% 50% at 12% -10%, rgba(157, 112, 255, 0.22), transparent 55%),
    radial-gradient(ellipse 55% 45% at 95% 8%, rgba(255, 112, 200, 0.16), transparent 50%),
    radial-gradient(ellipse 50% 40% at 80% 90%, rgba(157, 112, 255, 0.12), transparent 55%),
    var(--bg);
}

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

.wrap-wide {
  width: min(100% - 2rem, 80rem);
  margin-inline: auto;
}

/* Header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(16px);
  background: rgba(19, 13, 28, 0.72);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 0.85rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  flex-shrink: 0;
}

.logo svg {
  width: 2.4rem;
  height: 2.4rem;
}

.logo-word {
  font-weight: 700;
  letter-spacing: 0.18em;
  font-size: 0.92rem;
}

.nav {
  display: flex;
  align-items: center;
  gap: clamp(0.75rem, 2vw, 1.6rem);
  flex-wrap: wrap;
  justify-content: flex-end;
}

.nav a {
  color: var(--muted);
  font-size: 0.92rem;
  transition: color 0.25s ease, text-shadow 0.25s ease;
}

.nav a:hover,
.nav a[aria-current="page"] {
  color: var(--text);
  text-shadow: 0 0 18px var(--glow-pink);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  padding: 0.7rem 1.15rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 600;
  font-size: 0.92rem;
  flex-shrink: 0;
  white-space: nowrap;
  transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease, border-color 0.25s ease;
}

.btn-short {
  display: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--pink), var(--violet));
  color: #1a0e18;
  box-shadow: 0 0 24px var(--glow-pink);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 0 32px var(--glow-violet);
}

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

.btn-ghost:hover {
  border-color: var(--pink);
  box-shadow: 0 0 20px var(--glow-pink);
}

.btn-header {
  padding: 0.55rem 1rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.75rem;
}

/* Hero */

.hero {
  position: relative;
  padding-block: clamp(2.5rem, 7vw, 6rem);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: center;
}

.eyebrow {
  display: inline-block;
  color: var(--pink);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-size: 0.78rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.hero h1 {
  margin: 0;
  font-size: clamp(2.4rem, 6.4vw, 5.4rem);
  line-height: 0.98;
  letter-spacing: -0.03em;
  font-weight: 750;
}

.lede {
  max-width: 36rem;
  color: var(--muted);
  font-size: clamp(1rem, 1.5vw, 1.15rem);
  margin-top: 1.25rem;
}

.hero-art {
  position: relative;
  min-height: 18rem;
  overflow: hidden;
}

.hero-art svg {
  width: 100%;
  height: auto;
  max-width: none;
  filter: drop-shadow(0 20px 40px rgba(157, 112, 255, 0.18));
}

.orbit,
.orbit-slow {
  transform-box: fill-box;
  transform-origin: center;
}

.orbit {
  animation: spin 48s linear infinite;
}

.orbit-slow {
  animation: spin 72s linear infinite reverse;
}

.drift {
  animation: drift 9s ease-in-out infinite;
}

.drift-alt {
  animation: drift 11s ease-in-out infinite reverse;
}

.glow-pulse {
  animation: glow 6s ease-in-out infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

@keyframes drift {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-8px);
  }
}

@keyframes glow {
  0%,
  100% {
    opacity: 0.55;
  }
  50% {
    opacity: 1;
  }
}

/* Sections */

section {
  padding-block: clamp(3.5rem, 8vw, 7rem);
}

.section-plain {
  background: transparent;
}

.section-panel {
  background:
    radial-gradient(ellipse 80% 70% at 0% 0%, rgba(255, 112, 200, 0.08), transparent 50%),
    var(--bg-section);
  border-block: 1px solid var(--line);
}

.section-head {
  display: grid;
  grid-template-columns: minmax(0, 18rem) minmax(0, 1fr);
  gap: 1.5rem 3rem;
  margin-bottom: clamp(2rem, 4vw, 3.5rem);
  align-items: end;
}

.kicker {
  color: var(--violet);
  font-size: 0.82rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-weight: 650;
  margin: 0 0 0.4rem;
}

h2 {
  margin: 0;
  font-size: clamp(1.8rem, 3.6vw, 3rem);
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.section-head p {
  margin: 0;
  color: var(--muted);
  max-width: 38rem;
}

/* Directions — asymmetric, not a card grid clone */

.directions {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 1.25rem;
}

.dir-main,
.dir-side,
.project-card,
.glass,
.principle,
.study {
  background: var(--glass);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.dir-main {
  padding: clamp(1.5rem, 3vw, 2.4rem);
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1.4rem;
  align-items: start;
}

.dir-side {
  display: grid;
  gap: 1.25rem;
}

.dir-compact {
  padding: 1.35rem 1.4rem;
}

.dir-icon {
  width: 4.5rem;
  height: 4.5rem;
  flex-shrink: 0;
}

.dir-compact .dir-icon {
  width: 3.4rem;
  height: 3.4rem;
  margin-bottom: 0.7rem;
}

h3 {
  margin: 0 0 0.45rem;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

.dir-main p,
.dir-compact p,
.project-card p,
.study p,
.principle p {
  margin: 0;
  color: var(--muted);
}

/* Projects */

.projects-layout {
  display: grid;
  gap: 1.25rem;
}

.project-featured {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 0;
  overflow: hidden;
  min-height: 22rem;
}

.project-art,
.study-art {
  overflow: hidden;
}

.project-art {
  min-height: 16rem;
  background:
    radial-gradient(circle at 30% 20%, rgba(255, 112, 200, 0.12), transparent 45%),
    linear-gradient(160deg, rgba(29, 20, 40, 0.2), rgba(19, 13, 28, 0.4));
}

.project-art svg {
  width: 100%;
  height: 100%;
  min-height: 16rem;
  max-width: none;
}

.project-copy {
  padding: clamp(1.5rem, 3vw, 2.5rem);
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0.75rem;
}

.tag {
  align-self: flex-start;
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--pink);
  border: 1px solid rgba(255, 112, 200, 0.35);
  padding: 0.28rem 0.6rem;
  border-radius: 999px;
}

.project-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.project-card {
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: border-color 0.3s ease, box-shadow 0.3s ease, transform 0.3s ease;
}

.project-card:hover,
.study:hover {
  border-color: rgba(255, 112, 200, 0.4);
  box-shadow: 0 12px 40px rgba(19, 13, 28, 0.35), 0 0 28px var(--glow-violet);
  transform: translateY(-3px);
}

.project-card .project-art {
  min-height: 13rem;
}

.project-card .project-copy {
  padding: 1.35rem 1.4rem 1.6rem;
}

.link-more {
  color: var(--text);
  font-weight: 600;
  font-size: 0.92rem;
  margin-top: 0.4rem;
}

.link-more span {
  color: var(--pink);
  margin-left: 0.25rem;
  transition: margin-left 0.25s ease;
}

.link-more:hover span {
  margin-left: 0.5rem;
}

/* Approach timeline */

.steps {
  display: grid;
  gap: 0;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-stack {
  padding-bottom: clamp(3.5rem, 8vw, 7rem);
}

.about-intro {
  padding-top: 0;
}

.note-gap {
  margin-top: 2rem;
}

.step {
  display: grid;
  grid-template-columns: 5.5rem 1.4rem 1fr;
  gap: 1.25rem;
  align-items: stretch;
}

.step-num {
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  font-weight: 750;
  letter-spacing: -0.04em;
  line-height: 1;
  background: linear-gradient(180deg, var(--pink), var(--violet));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  padding-top: 0.15rem;
}

.step-rail {
  position: relative;
}

.step-rail::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 0.55rem;
  bottom: -0.55rem;
  width: 1px;
  background: linear-gradient(180deg, var(--pink), var(--violet), transparent);
  transform: translateX(-50%);
}

.step:last-child .step-rail::before {
  bottom: 55%;
}

.step-dot {
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 50%;
  margin: 0.5rem auto 0;
  background: var(--pink);
  box-shadow: 0 0 12px var(--glow-pink);
  position: relative;
  z-index: 1;
}

.step-body {
  padding: 0 0 2.4rem;
  max-width: 40rem;
}

.step-body h3 {
  font-size: 1.35rem;
}

/* Closing band */

.close {
  position: relative;
  overflow: hidden;
  padding-block: clamp(4rem, 10vw, 8rem);
}

.close-inner {
  position: relative;
  z-index: 1;
  max-width: 46rem;
}

.close h2 {
  font-size: clamp(2.2rem, 6vw, 4.6rem);
  margin-bottom: 1rem;
}

.close p {
  color: var(--muted);
  font-size: 1.1rem;
  margin: 0 0 1.75rem;
}

.close-art {
  position: absolute;
  right: -6%;
  top: 50%;
  transform: translateY(-50%);
  width: min(46vw, 34rem);
  opacity: 0.85;
  pointer-events: none;
}

/* Footer */

.site-footer {
  border-top: 1px solid var(--line);
  padding-block: 2.5rem 3rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 2rem;
}

.footer-copy {
  color: var(--muted);
  max-width: 28rem;
  margin-top: 0.75rem;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem 1.4rem;
  align-content: start;
}

.footer-nav a {
  color: var(--muted);
}

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

.legal {
  margin-top: 2rem;
  color: var(--muted-soft);
  font-size: 0.85rem;
}

/* Inner pages */

.page-hero {
  padding-block: clamp(2.8rem, 6vw, 5rem) clamp(2rem, 4vw, 3rem);
}

.page-hero h1 {
  margin: 0;
  font-size: clamp(2.2rem, 5.5vw, 4.4rem);
  letter-spacing: -0.03em;
  line-height: 1.05;
}

.page-hero .lede {
  margin-top: 1rem;
}

.study {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 0;
  overflow: hidden;
  margin-bottom: 1.5rem;
  scroll-margin-top: 5.5rem;
  transition: border-color 0.3s ease, box-shadow 0.3s ease, transform 0.3s ease;
}

.study:nth-child(even) {
  grid-template-columns: 0.95fr 1.05fr;
}

.study:nth-child(even) .study-art {
  order: 2;
}

.study-art {
  min-height: 22rem;
  background: radial-gradient(circle at 70% 30%, rgba(157, 112, 255, 0.16), transparent 50%);
}

.study-art svg {
  width: 100%;
  height: 100%;
  min-height: 22rem;
  max-width: none;
}

.study-body {
  padding: clamp(1.5rem, 3vw, 2.4rem);
}

.study-body h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  margin-bottom: 0.75rem;
}

.study-meta {
  display: grid;
  gap: 1rem;
  margin-top: 1.4rem;
}

.study-meta h3 {
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--violet);
}

/* About */

.about-grid {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: clamp(1.5rem, 4vw, 3.5rem);
  align-items: center;
}

.about-copy p + p {
  margin-top: 1rem;
  color: var(--muted);
}

.about-copy p:first-of-type {
  color: var(--text);
  font-size: 1.12rem;
}

.principles {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.15rem;
}

.principle {
  padding: 1.4rem 1.5rem;
}

.principle h3 {
  margin-bottom: 0.5rem;
}

.tracks {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.track {
  display: grid;
  grid-template-columns: minmax(9rem, 14rem) 1fr;
  gap: 1.5rem;
  padding-block: 1.4rem;
  border-top: 1px solid var(--line);
}

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

.track h3 {
  margin: 0;
}

/* Utilities */

.note {
  color: var(--muted-soft);
  font-size: 0.9rem;
}

@media (max-width: 1024px) {
  .hero-grid,
  .directions,
  .project-featured,
  .study,
  .study:nth-child(even),
  .about-grid,
  .section-head,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .study:nth-child(even) .study-art {
    order: 0;
  }

  .close-art {
    width: min(70vw, 22rem);
    opacity: 0.35;
    right: -8%;
  }

  .dir-main {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .wrap,
  .wrap-wide {
    width: min(100% - 1.25rem, var(--max));
  }

  .header-inner {
    flex-wrap: wrap;
    row-gap: 0.65rem;
  }

  .nav {
    width: 100%;
    justify-content: flex-start;
    gap: 0.65rem 0.9rem;
  }

  .btn-header {
    margin-left: 0;
    padding: 0.4rem 0.8rem;
    font-size: 0.8rem;
  }

  .project-pair,
  .principles {
    grid-template-columns: 1fr;
  }

  .step {
    grid-template-columns: 3.4rem 1rem 1fr;
    gap: 0.7rem;
  }

  .track {
    grid-template-columns: 1fr;
    gap: 0.4rem;
  }

  .close-art {
    display: none;
  }

  .study-art,
  .study-art svg,
  .project-art,
  .project-art svg {
    min-height: 14rem;
  }
}

@media (max-width: 520px) {
  .btn-full {
    display: none;
  }

  .btn-short {
    display: inline;
  }
}

@media (max-width: 360px) {
  .logo-word {
    letter-spacing: 0.12em;
  }

  .hero h1 {
    font-size: 2.1rem;
  }

  .nav a {
    font-size: 0.82rem;
  }
}

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

  .orbit,
  .orbit-slow,
  .drift,
  .drift-alt,
  .glow-pulse {
    animation: none;
  }

  .project-card,
  .study,
  .btn,
  .link-more span {
    transition: none;
  }

  .project-card:hover,
  .study:hover {
    transform: none;
  }
}