:root {
  --bg: #050608;
  --bg-soft: #090c11;
  --surface: rgba(15, 19, 26, 0.88);
  --surface-strong: #111720;
  --text: #f4f7ff;
  --muted: #a5adbb;
  --line: rgba(174, 196, 255, 0.18);
  --line-strong: rgba(174, 196, 255, 0.34);
  --blue: #aecdff;
  --violet: #b8a6ff;
  --green: #7ee88d;
  --danger: #ff9d9d;
  --shadow: 0 28px 90px rgba(0, 0, 0, 0.48);
  --max-width: 1180px;
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
}

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

html {
  scroll-behavior: smooth;
  color-scheme: dark;
}

body {
  min-height: 100vh;
  overflow-x: hidden;
  color: var(--text);
  background:
    radial-gradient(circle at 12% 12%, rgba(82, 111, 178, 0.14), transparent 28rem),
    radial-gradient(circle at 92% 40%, rgba(80, 174, 102, 0.08), transparent 24rem),
    var(--bg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
}

body::before {
  position: fixed;
  z-index: -1;
  inset: 0;
  content: "";
  opacity: 0.38;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(174, 205, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(174, 205, 255, 0.035) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: linear-gradient(to bottom, black, transparent 80%);
}

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

a {
  color: inherit;
}

.skip-link {
  position: fixed;
  z-index: 1000;
  top: 10px;
  left: 10px;
  padding: 10px 14px;
  color: #09101c;
  background: var(--blue);
  border-radius: 6px;
  font-weight: 800;
  transform: translateY(-150%);
}

.skip-link:focus {
  transform: translateY(0);
}

nav {
  position: fixed;
  z-index: 100;
  top: 0;
  right: 0;
  left: 0;
  padding: 0 20px;
  background: rgba(5, 6, 8, 0.82);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-width);
  height: 64px;
  margin: 0 auto;
}

.nav-brand {
  color: var(--text);
  font-size: 1.02rem;
  font-weight: 750;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 24px;
  list-style: none;
}

.nav-links a {
  color: var(--muted);
  font-size: 0.94rem;
  text-decoration: none;
  transition: color 180ms ease;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text);
}

main {
  padding: 88px 20px 56px;
}

.page-shell {
  display: grid;
  gap: 24px;
  max-width: var(--max-width);
  margin: 0 auto;
}

.panel {
  position: relative;
  overflow: hidden;
  background: linear-gradient(145deg, rgba(17, 23, 32, 0.96), rgba(8, 11, 16, 0.94));
  border: 1px solid var(--line);
  border-radius: 26px;
  box-shadow: var(--shadow);
}

.hero {
  min-height: min(720px, calc(100vh - 112px));
  display: flex;
  align-items: center;
  padding: clamp(28px, 6vw, 76px);
  background-image:
    linear-gradient(90deg, rgba(4, 6, 9, 0.98) 0%, rgba(4, 6, 9, 0.93) 36%, rgba(4, 6, 9, 0.38) 70%, rgba(4, 6, 9, 0.08) 100%),
    url("/assets/nonogram-museum/archive-hero.jpg");
  background-position: center;
  background-size: cover;
  isolation: isolate;
}

.hero::before,
.hero::after {
  position: absolute;
  z-index: -1;
  content: "";
  pointer-events: none;
}

.hero::before {
  inset: 0;
  opacity: 0.18;
  background: repeating-linear-gradient(to bottom, transparent 0, transparent 3px, rgba(255, 255, 255, 0.08) 4px);
}

.hero::after {
  inset: auto 0 0;
  height: 46%;
  background: linear-gradient(to top, rgba(4, 6, 9, 0.88), transparent);
}

.hero-copy {
  position: relative;
  z-index: 2;
  max-width: 610px;
}

.identity-row {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 28px;
}

.app-icon {
  width: 66px;
  height: 66px;
  object-fit: cover;
  border: 1px solid rgba(174, 205, 255, 0.42);
  border-radius: 16px;
  box-shadow: 0 0 30px rgba(108, 153, 255, 0.22);
}

.identity-copy {
  display: grid;
  gap: 3px;
}

.eyebrow,
.section-kicker,
.record-label,
.status-line {
  color: var(--blue);
  font-family: var(--mono);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.identity-name {
  font-size: 1.03rem;
  font-weight: 760;
  letter-spacing: -0.02em;
}

h1,
h2,
h3 {
  line-height: 1.06;
  letter-spacing: -0.035em;
}

h1 {
  max-width: 11ch;
  margin-bottom: 22px;
  font-size: clamp(3.1rem, 7.5vw, 6.7rem);
  font-weight: 790;
}

h1 span {
  color: var(--blue);
  text-shadow: 0 0 34px rgba(174, 205, 255, 0.2);
}

.lead {
  max-width: 56ch;
  margin-bottom: 28px;
  color: #c4cad5;
  font-size: clamp(1rem, 1.7vw, 1.18rem);
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
}

.primary-cta,
.secondary-cta,
.contact-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 0 19px;
  border-radius: 8px;
  font-weight: 760;
  text-decoration: none;
  transition: transform 180ms ease, border-color 180ms ease, background 180ms ease;
}

.primary-cta,
.contact-cta {
  color: #08101c;
  background: var(--blue);
  border: 1px solid var(--blue);
}

.primary-cta::before {
  margin-right: 10px;
  content: "●";
  color: var(--green);
  font-size: 0.74rem;
  text-shadow: 0 0 12px rgba(126, 232, 141, 0.8);
}

.secondary-cta {
  color: var(--text);
  background: rgba(9, 13, 20, 0.72);
  border: 1px solid var(--line-strong);
}

.secondary-cta:hover,
.contact-cta:hover {
  transform: translateY(-2px);
  border-color: var(--blue);
}

.trust-list {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  list-style: none;
}

.trust-list li {
  padding: 8px 11px;
  color: var(--muted);
  background: rgba(7, 10, 15, 0.72);
  border: 1px solid var(--line);
  border-radius: 999px;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.section {
  padding: clamp(28px, 5vw, 58px);
}

.section-header {
  display: grid;
  gap: 12px;
  max-width: 700px;
  margin-bottom: 30px;
}

.section-header h2,
.privacy-callout h2,
.final-copy h2 {
  font-size: clamp(2rem, 4.5vw, 3.75rem);
}

.section-header p,
.feature-card p,
.loop-step p,
.artifact-card p,
.privacy-callout p,
.final-copy p,
.legal-card p,
.legal-card li,
.support-card p {
  color: var(--muted);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.feature-card,
.loop-step,
.support-card {
  min-height: 210px;
  padding: 24px;
  background: rgba(7, 10, 15, 0.72);
  border: 1px solid var(--line);
  border-radius: 14px;
  transition: transform 180ms ease, border-color 180ms ease;
}

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

.feature-index,
.loop-index {
  display: inline-grid;
  width: 36px;
  height: 36px;
  margin-bottom: 30px;
  place-items: center;
  color: #07101d;
  background: var(--blue);
  border-radius: 7px;
  font-family: var(--mono);
  font-size: 0.76rem;
  font-weight: 800;
}

.feature-card:nth-child(2) .feature-index {
  background: var(--violet);
}

.feature-card:nth-child(3) .feature-index {
  background: var(--green);
}

.feature-card h3,
.loop-step h3,
.artifact-card h3,
.support-card h2 {
  margin-bottom: 10px;
  font-size: 1.3rem;
}

.artifact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.artifact-card {
  overflow: hidden;
  background: rgba(7, 10, 15, 0.82);
  border: 1px solid var(--line);
  border-radius: 14px;
  transition: transform 180ms ease, border-color 180ms ease;
}

.artifact-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 1 / 1;
  background: #050608;
  border-bottom: 1px solid var(--line);
}

.artifact-frame::after {
  position: absolute;
  inset: 0;
  content: "";
  pointer-events: none;
  box-shadow: inset 0 0 50px rgba(0, 0, 0, 0.42);
}

.artifact-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 500ms ease;
}

.artifact-card:hover img {
  transform: scale(1.025);
}

.artifact-copy {
  padding: 20px;
}

.record-label {
  display: block;
  margin-bottom: 10px;
  color: var(--green);
}

.artifact-card p {
  font-size: 0.94rem;
}

.loop-panel {
  display: grid;
  grid-template-columns: minmax(260px, 0.8fr) minmax(0, 1.2fr);
  gap: clamp(28px, 6vw, 72px);
  align-items: center;
}

.loop-intro h2 {
  margin: 10px 0 18px;
  font-size: clamp(2rem, 4.5vw, 3.7rem);
}

.loop-intro p {
  color: var(--muted);
}

.loop-list {
  display: grid;
  gap: 12px;
}

.loop-step {
  min-height: auto;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 18px;
  align-items: start;
}

.loop-index {
  margin: 0;
  color: var(--green);
  background: rgba(126, 232, 141, 0.1);
  border: 1px solid rgba(126, 232, 141, 0.3);
}

.privacy-callout,
.final-panel {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 28px;
  align-items: center;
}

.privacy-callout {
  background:
    radial-gradient(circle at 84% 20%, rgba(126, 232, 141, 0.11), transparent 24rem),
    linear-gradient(145deg, rgba(17, 23, 32, 0.96), rgba(8, 11, 16, 0.94));
}

.privacy-callout h2,
.final-copy h2 {
  margin: 10px 0 14px;
}

.privacy-links,
.final-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.privacy-links {
  justify-content: flex-end;
}

.final-panel {
  background:
    linear-gradient(110deg, rgba(9, 14, 22, 0.96), rgba(13, 21, 28, 0.94)),
    var(--surface-strong);
}

.status-line {
  margin-top: 15px;
  color: var(--green);
}

.site-footer {
  border-top: 1px solid var(--line);
  background: rgba(5, 6, 8, 0.8);
}

.site-footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 24px 20px;
}

.site-footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}

.site-footer a {
  color: var(--muted);
  font-size: 0.9rem;
  text-decoration: none;
}

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

.site-footer-copy {
  color: #6f7887;
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* Privacy and support pages */
.legal-shell {
  max-width: 900px;
}

.legal-hero {
  padding: clamp(28px, 5vw, 52px);
  background:
    radial-gradient(circle at 90% 10%, rgba(174, 205, 255, 0.13), transparent 22rem),
    linear-gradient(145deg, rgba(17, 23, 32, 0.98), rgba(8, 11, 16, 0.96));
}

.legal-identity {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 28px;
}

.legal-identity .app-icon {
  width: 54px;
  height: 54px;
  border-radius: 13px;
}

.legal-hero h1 {
  max-width: none;
  margin: 8px 0 14px;
  font-size: clamp(2.6rem, 7vw, 5rem);
}

.legal-hero p {
  max-width: 66ch;
  color: var(--muted);
}

.effective-date {
  display: inline-block;
  margin-top: 20px;
  padding: 7px 10px;
  color: var(--blue);
  background: rgba(174, 205, 255, 0.08);
  border: 1px solid var(--line);
  border-radius: 6px;
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.legal-card {
  padding: clamp(26px, 5vw, 50px);
}

.legal-card section + section {
  margin-top: 30px;
  padding-top: 30px;
  border-top: 1px solid var(--line);
}

.legal-card h2 {
  margin-bottom: 10px;
  font-size: 1.35rem;
}

.legal-card p + p {
  margin-top: 10px;
}

.legal-card ul {
  display: grid;
  gap: 8px;
  margin: 12px 0 0 20px;
}

.legal-card a:not(.contact-cta) {
  color: var(--blue);
}

.summary-box {
  margin-bottom: 30px;
  padding: 18px;
  color: #d6ddeb;
  background: rgba(126, 232, 141, 0.07);
  border: 1px solid rgba(126, 232, 141, 0.24);
  border-radius: 10px;
}

.support-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.support-card {
  min-height: 190px;
}

.support-card .record-label {
  color: var(--blue);
}

.contact-panel {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 22px;
  align-items: center;
  padding: clamp(26px, 5vw, 42px);
}

.contact-panel h2 {
  margin-bottom: 8px;
  font-size: clamp(1.8rem, 4vw, 2.7rem);
}

.contact-panel p {
  color: var(--muted);
}

:focus-visible {
  outline: 3px solid var(--green);
  outline-offset: 4px;
}

@media (max-width: 900px) {
  .feature-grid,
  .artifact-grid {
    grid-template-columns: 1fr;
  }

  .artifact-card {
    display: grid;
    grid-template-columns: minmax(180px, 0.7fr) 1fr;
  }

  .artifact-frame {
    border-right: 1px solid var(--line);
    border-bottom: 0;
  }

  .artifact-copy {
    align-self: center;
    padding: clamp(20px, 4vw, 34px);
  }

  .loop-panel {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  main {
    padding: 78px 12px 36px;
  }

  .page-shell {
    gap: 14px;
  }

  .panel {
    border-radius: 18px;
  }

  .hero {
    min-height: 690px;
    align-items: flex-end;
    padding: 28px 22px;
    background-image:
      linear-gradient(to bottom, rgba(4, 6, 9, 0.12) 0%, rgba(4, 6, 9, 0.42) 35%, rgba(4, 6, 9, 0.98) 74%),
      url("/assets/nonogram-museum/archive-hero.jpg");
    background-position: 68% center;
  }

  h1 {
    font-size: clamp(2.85rem, 14vw, 4.65rem);
  }

  .section {
    padding: 28px 22px;
  }

  .privacy-callout,
  .final-panel,
  .contact-panel {
    grid-template-columns: 1fr;
  }

  .privacy-links {
    justify-content: flex-start;
  }

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

  .site-footer-inner {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (max-width: 540px) {
  .nav-links {
    gap: 14px;
  }

  .nav-brand {
    font-size: 0.94rem;
  }

  .artifact-card {
    display: block;
  }

  .artifact-frame {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .cta-row,
  .privacy-links,
  .final-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .primary-cta,
  .secondary-cta,
  .contact-cta {
    width: 100%;
  }

  .identity-row {
    margin-bottom: 20px;
  }

  .app-icon {
    width: 58px;
    height: 58px;
  }
}

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

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition: none !important;
  }
}