/* ==========================================================================
   home.css — sysinit homepage
   Editorial / Swiss layout with technical-craft accents.
   Strict grid, type does the lifting, mono for captions and indices.
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Hero — strict three-column grid: index · headline · portrait card
   -------------------------------------------------------------------------- */

.hero {
  position: relative;
  padding: var(--s-8) 0 var(--s-9);
  overflow: hidden;
}

/* Engineering graph paper, fading out towards the fold */
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(color-mix(in srgb, var(--ink) 7%, transparent) 1px, transparent 1px),
    linear-gradient(90deg, color-mix(in srgb, var(--ink) 7%, transparent) 1px, transparent 1px);
  background-size: 40px 40px;
  -webkit-mask-image: radial-gradient(ellipse 90% 100% at 65% 0%, black 0%, transparent 72%);
  mask-image: radial-gradient(ellipse 90% 100% at 65% 0%, black 0%, transparent 72%);
  pointer-events: none;
}

/* Signal wash behind the headline */
.hero::after {
  content: "";
  position: absolute;
  top: -20%;
  left: 30%;
  width: 50%;
  height: 70%;
  background: radial-gradient(ellipse at center,
    color-mix(in srgb, var(--signal) 7%, transparent) 0%, transparent 65%);
  pointer-events: none;
}

[data-theme="dark"] .hero::after {
  background: radial-gradient(ellipse at center,
    color-mix(in srgb, var(--signal) 12%, transparent) 0%, transparent 65%);
}

.hero-content {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 160px 1fr 240px;
  gap: var(--s-6);
  align-items: start;
}

/* Load choreography — staggered rise, once per page load */
@keyframes hero-rise {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

.hero-index,
.hero h1,
.hero p,
.hero-actions,
.hero-visual {
  animation: hero-rise 0.7s cubic-bezier(0.22, 1, 0.36, 1) backwards;
}

.hero h1         { animation-delay: 0.05s; }
.hero p          { animation-delay: 0.18s; }
.hero-actions    { animation-delay: 0.30s; }
.hero-index      { animation-delay: 0.42s; }
.hero-visual     { animation-delay: 0.42s; }

.hero-index .eyebrow {
  margin-bottom: var(--s-2);
}

.hero-index ol {
  margin: var(--s-2) 0 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: var(--t-xs);
  color: var(--ink-3);
  line-height: 2;
}

.hero-index a { color: inherit; }
.hero-index a:hover { color: var(--signal); }

.hero h1 {
  font-family: var(--font-sans);
  font-size: clamp(56px, 8vw, 104px);
  line-height: 0.92;
  letter-spacing: -0.04em;
  font-weight: 600;
  margin: 0;
  color: var(--ink);
  text-wrap: balance;
}

.hero h1 .signal { color: var(--signal); }

/* Hand-drawn rule under the signal word, drawn in after the rise */
.hero h1 .signal {
  position: relative;
  display: inline-block;
}

.hero h1 .signal::after {
  content: "";
  position: absolute;
  left: 0.02em;
  right: 0.02em;
  bottom: 0.02em;
  height: 0.045em;
  background: var(--signal);
  transform: scaleX(0);
  transform-origin: left center;
  animation: signal-draw 0.5s cubic-bezier(0.65, 0, 0.35, 1) 0.85s forwards;
}

@keyframes signal-draw {
  to { transform: scaleX(1); }
}

.hero p {
  font-family: var(--font-sans);
  font-size: var(--t-lg);
  line-height: 1.4;
  color: var(--ink-2);
  margin: var(--s-7) 0 0;
  max-width: 46ch;
  text-wrap: pretty;
}

.hero-actions {
  display: flex;
  gap: var(--s-3);
  margin-top: var(--s-7);
}

.hero-cta { /* legacy class — keep working */
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  padding: 12px 18px;
  font-family: var(--font-sans);
  font-size: var(--t-sm);
  font-weight: 500;
  background: var(--ink);
  color: var(--paper);
  border-radius: var(--r-2);
  border: 1px solid var(--ink);
  transition: background 0.15s ease, border-color 0.15s ease;
}

.hero-cta:hover {
  background: var(--signal);
  border-color: var(--signal);
  /* --paper, not #fff: dark theme's signal (#ff6a4d) needs dark text for contrast */
  color: var(--paper);
}

.hero-cta svg {
  width: 14px;
  height: 14px;
  stroke-width: 1.5;
}

/* Portrait card */
.hero-visual {
  display: flex;
  flex-direction: column;
  gap: var(--s-4);
  align-items: flex-start;
}

.photo-container {
  width: 100%;
  max-width: 240px;
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  position: relative;
}

/* Registration ring — slow-rotating dashed circle, like a technical drawing */
.photo-container::before {
  content: "";
  position: absolute;
  inset: 0;
  border: 1px dashed var(--line-strong);
  border-radius: 50%;
  animation: ring-spin 90s linear infinite;
  pointer-events: none;
}

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

.profile-photo {
  display: block;
  width: 92%;
  height: 92%;
  margin: 4%;
  border-radius: 50%;
  object-fit: cover;
  object-position: center 15%;
}

.hero-portrait-meta {
  font-family: var(--font-mono);
  font-size: var(--t-xs);
  color: var(--ink-3);
  line-height: 1.6;
  letter-spacing: 0.02em;
}

.hero-portrait-meta strong {
  color: var(--ink);
  font-weight: 500;
}

/* --------------------------------------------------------------------------
   2. Sections — generic frame
   -------------------------------------------------------------------------- */

.services,
.contact,
.imprint {
  padding: var(--s-9) 0;
}

/* --------------------------------------------------------------------------
   2b. Book banner — "Podman in Production" promo band between hero and
   services. Also reused on the virtualization subpage; the whole band is
   one link to podman-book.com.
   -------------------------------------------------------------------------- */

.book-banner {
  display: block;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--paper-2);
  color: inherit;
}

.book-banner:hover { color: inherit; }

.book-banner-inner {
  display: flex;
  align-items: center;
  gap: var(--s-5);
  padding-top: var(--s-4);
  padding-bottom: var(--s-4);
}

.book-banner-cover {
  flex: 0 0 auto;
  width: 48px;
  height: auto;
  border: 1px solid var(--line);
}

.book-banner-eyebrow {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--t-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--signal);
}

.book-banner-title {
  display: block;
  font-weight: 600;
  margin-top: 2px;
}

.book-banner-line {
  display: block;
  font-size: var(--t-sm);
  color: var(--ink-3);
  margin-top: 2px;
}

.book-banner-cta {
  flex: 0 0 auto;
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  font-family: var(--font-mono);
  font-size: var(--t-xs);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-2);
}

.book-banner-cta svg {
  width: 14px;
  height: 14px;
  stroke-width: 1.5;
  transition: transform 0.2s ease;
}

.book-banner:hover .book-banner-cta { color: var(--signal); }
.book-banner:hover .book-banner-cta svg { transform: translateX(3px); }

/* --------------------------------------------------------------------------
   2c. References — customer logo marquee.
   Logos render as ink stencils: each tile is an empty <a> whose alpha
   shape (--logo, set inline by tools/gen-references.py) is CSS-masked over
   currentColor. That keeps every mark on the paper/ink ramp in both themes
   and lets hover lift it to the signal color.
   -------------------------------------------------------------------------- */

.references {
  padding: var(--s-8) 0;
  border-bottom: 1px solid var(--line);
}

.references-head {
  display: flex;
  align-items: baseline;
  gap: var(--s-4);
  margin-bottom: var(--s-7);
}

.references-sub {
  font-size: var(--t-sm);
  color: var(--ink-3);
}

.references-marquee {
  overflow: hidden;
  -webkit-mask-image: linear-gradient(90deg, transparent, black 8%, black 92%, transparent);
  mask-image: linear-gradient(90deg, transparent, black 8%, black 92%, transparent);
}

.references-track {
  display: flex;
  align-items: center;
  width: max-content;
  animation: marquee-scroll 55s linear infinite;
}

@keyframes marquee-scroll {
  to { transform: translateX(-50%); }
}

.references-marquee:hover .references-track,
.references-marquee:focus-within .references-track {
  animation-play-state: paused;
}

/* Spacing via margin (not gap): the -50% loop shift only lands seamlessly
   when each tile carries its own trailing space. */
.reference-logo {
  position: relative;
  flex: 0 0 auto;
  display: block;
  margin-right: var(--s-8);
  background: currentColor;
  color: var(--ink-2);
  opacity: 0.7;
  -webkit-mask: var(--logo) center / contain no-repeat;
  mask: var(--logo) center / contain no-repeat;
  transition: color 0.25s ease, opacity 0.25s ease, transform 0.25s ease;
}

/* Original brand colors, revealed on hover. --logo-color overrides the
   artwork for sources that are white or colorless (see references.toml);
   the parent's mask clips this layer to the same silhouette. */
.reference-logo::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--logo-color, var(--logo)) center / contain no-repeat;
  opacity: 0;
  transition: opacity 0.25s ease;
}

.reference-logo:hover,
.reference-logo:focus-visible {
  color: transparent; /* stencil hands over to the color layer */
  opacity: 1;
  transform: translateY(-2px);
}

.reference-logo:hover::after,
.reference-logo:focus-visible::after {
  opacity: 1;
}

/* Dark theme: several originals (black wordmarks, dark seals) vanish on
   dark paper — keep the signal-tint hover instead of true colors. */
[data-theme="dark"] .reference-logo::after { display: none; }

[data-theme="dark"] .reference-logo:hover,
[data-theme="dark"] .reference-logo:focus-visible {
  color: var(--signal);
}

/* --------------------------------------------------------------------------
   3. Expertise grid — 4-column index card
   -------------------------------------------------------------------------- */

.expertise-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--ink);
  counter-reset: expertise;
}

.expertise-item {
  position: relative;
  padding: var(--s-6) var(--s-5) var(--s-7);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: var(--s-3);
  counter-increment: expertise;
  transition: background 0.25s ease;
}

.expertise-item:hover { background: var(--paper-2); }

.expertise-item:nth-child(4n) { border-right: 0; }
.expertise-item:nth-last-child(-n+4) { border-bottom: 0; }

/* Card index — top-right mono numeral */
.expertise-item::after {
  content: counter(expertise, decimal-leading-zero);
  position: absolute;
  top: var(--s-4);
  right: var(--s-4);
  font-family: var(--font-mono);
  font-size: var(--t-xs);
  letter-spacing: 0.08em;
  color: var(--ink-4);
  transition: color 0.25s ease;
}

.expertise-item:hover::after { color: var(--signal); }

/* Crop-mark corner, revealed on hover */
.expertise-item::before {
  content: "";
  position: absolute;
  top: -1px;
  left: -1px;
  width: 14px;
  height: 14px;
  border-top: 2px solid var(--signal);
  border-left: 2px solid var(--signal);
  opacity: 0;
  transition: opacity 0.25s ease;
  pointer-events: none;
}

.expertise-item:hover::before { opacity: 1; }

/* Staggered reveal cascade inside the grid */
.expertise-grid .reveal-on-scroll:nth-child(4n+2) { transition-delay: 0.08s; }
.expertise-grid .reveal-on-scroll:nth-child(4n+3) { transition-delay: 0.16s; }
.expertise-grid .reveal-on-scroll:nth-child(4n)   { transition-delay: 0.24s; }

.expertise-icon {
  width: 28px;
  height: 28px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-top: var(--s-1);
}

.expertise-icon svg {
  width: 100%;
  height: 100%;
  stroke: var(--ink);
  stroke-width: 1.4;
  fill: none;
  transition: stroke 0.25s ease, transform 0.25s ease;
}

.expertise-item:hover .expertise-icon svg {
  stroke: var(--signal);
  transform: translateY(-2px);
}

.expertise-item h3 {
  font-family: var(--font-sans);
  font-size: var(--t-md);
  font-weight: 600;
  letter-spacing: -0.012em;
  color: var(--ink);
  margin: var(--s-2) 0 0;
  text-wrap: balance;
}

.expertise-item p {
  font-family: var(--font-sans);
  font-size: var(--t-sm);
  line-height: 1.5;
  color: var(--ink-2);
  margin: 0;
}

.expertise-item p a {
  color: var(--ink);
  border-bottom: 1px solid var(--line-strong);
}

.expertise-item p a:hover {
  color: var(--signal);
  border-color: var(--signal);
}

/* Linked card heading (e.g. security assessments → subpage) */
.expertise-item h3 a {
  color: inherit;
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
}

.expertise-item h3 a svg {
  width: 13px;
  height: 13px;
  stroke: var(--signal);
  stroke-width: 1.6;
  fill: none;
  transition: transform 0.2s ease;
}

.expertise-item h3 a:hover { color: var(--signal); }
.expertise-item h3 a:hover svg { transform: translateX(3px); }

/* --------------------------------------------------------------------------
   4. Contact — split layout
   -------------------------------------------------------------------------- */

.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s-7);
  align-items: start;
}

.contact-headline {
  font-family: var(--font-sans);
  font-size: clamp(36px, 4.5vw, 56px);
  line-height: 1.02;
  letter-spacing: -0.03em;
  font-weight: 600;
  color: var(--ink);
  margin: 0;
  max-width: 14ch;
  text-wrap: balance;
}

.contact-headline .signal { color: var(--signal); }

.contact-list {
  display: flex;
  flex-direction: column;
}

.contact-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--s-4) 0;
  border-top: 1px solid var(--line);
  text-decoration: none;
  color: var(--ink);
  transition: color 0.15s ease;
}

.contact-item:first-child { border-top: 1px solid var(--ink); }

.contact-item:hover { color: var(--signal); }
.contact-item:hover .contact-arrow { stroke: var(--signal); transform: translate(2px, -2px); }

.contact-item .eyebrow { margin-bottom: 4px; }

.contact-text {
  display: flex;
  flex-direction: column;
}

.contact-text .value {
  font-family: var(--font-sans);
  font-size: var(--t-xl);
  font-weight: 500;
  letter-spacing: -0.018em;
  color: inherit;
  background-image: linear-gradient(var(--signal), var(--signal));
  background-repeat: no-repeat;
  background-position: 0 100%;
  background-size: 0% 1px;
  transition: background-size 0.3s cubic-bezier(0.65, 0, 0.35, 1);
}

.contact-item:hover .contact-text .value { background-size: 100% 1px; }

.contact-arrow {
  width: 16px;
  height: 16px;
  stroke: var(--ink-3);
  stroke-width: 1.5;
  fill: none;
  transition: transform 0.2s ease, stroke 0.15s ease;
}

.contact-booking {
  margin-top: var(--s-7);
  padding-top: var(--s-5);
  border-top: 1px solid var(--line);
}

.contact-booking .eyebrow {
  display: block;
  margin-bottom: var(--s-4);
}

.booking-cta {
  appearance: none;
  cursor: pointer;
}

/* --------------------------------------------------------------------------
   6. Imprint — plain document block
   -------------------------------------------------------------------------- */

.imprint-content {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: var(--s-7);
  align-items: start;
}

.imprint-meta {
  font-family: var(--font-mono);
  font-size: var(--t-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-3);
}

.imprint-details {
  font-family: var(--font-sans);
  font-size: var(--t-sm);
  line-height: 1.7;
  color: var(--ink-2);
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--s-6);
}

.imprint-details strong {
  font-weight: 600;
  color: var(--ink);
}

.imprint-details a {
  color: var(--ink);
  border-bottom: 1px solid var(--line-strong);
}

.imprint-details a:hover {
  color: var(--signal);
  border-color: var(--signal);
}

.detail-group { margin: 0; }

/* --------------------------------------------------------------------------
   7. Responsive
   -------------------------------------------------------------------------- */

@media (max-width: 1024px) {
  .hero-content {
    grid-template-columns: 120px 1fr 200px;
    gap: var(--s-5);
  }
  .expertise-grid { grid-template-columns: repeat(2, 1fr); }
  .expertise-item:nth-child(4n) { border-right: 1px solid var(--line); }
  .expertise-item:nth-child(2n) { border-right: 0; }
  .expertise-item:nth-last-child(-n+4) { border-bottom: 1px solid var(--line); }
  .expertise-item:nth-last-child(-n+2) { border-bottom: 0; }
}

@media (max-width: 768px) {
  .hero { padding: var(--s-7) 0 var(--s-8); }
  .hero-content {
    grid-template-columns: 1fr;
    gap: var(--s-6);
  }
  .hero-index { display: none; }
  .hero h1 { font-size: clamp(40px, 10vw, 64px); }
  .hero p { font-size: var(--t-md); margin-top: var(--s-5); }
  .hero-actions { margin-top: var(--s-5); flex-wrap: wrap; }
  .hero-visual { order: -1; flex-direction: row; align-items: center; gap: var(--s-4); }
  .photo-container { max-width: 88px; aspect-ratio: 1; }

  .services, .contact, .imprint {
    padding: var(--s-7) 0;
  }

  .references { padding: var(--s-7) 0; }
  .references-head { flex-direction: column; gap: var(--s-1); }
  .reference-logo { margin-right: var(--s-7); }

  .book-banner-inner { gap: var(--s-4); }
  .book-banner-line { display: none; }
  .book-banner-cta-label { display: none; }

  .expertise-grid { grid-template-columns: 1fr; }
  .expertise-item { border-right: 0 !important; }
  .expertise-item:last-child { border-bottom: 0; }

  .contact-content {
    grid-template-columns: 1fr;
    gap: var(--s-5);
  }

  .imprint-content {
    grid-template-columns: 1fr;
    gap: var(--s-4);
  }

  .imprint-details {
    grid-template-columns: 1fr;
    gap: var(--s-4);
  }
}

/* --------------------------------------------------------------------------
   8. Reduced motion
   -------------------------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  .hero-index, .hero h1, .hero p, .hero-actions, .hero-visual {
    animation: none !important;
  }
  .hero h1 .signal::after {
    animation: none !important;
    transform: scaleX(1);
  }
  .photo-container::before { animation: none !important; }
  .references-track { animation: none !important; }
  .references-marquee {
    overflow-x: auto;
    -webkit-mask-image: none;
    mask-image: none;
  }
  /* The duplicate logo set only serves the loop — drop it when static */
  .reference-logo[aria-hidden="true"] { display: none; }
  .expertise-grid .reveal-on-scroll { transition-delay: 0s !important; }
}