/* ==========================================================================
   podman-book.css — podman-book.com landing
   Hero (title + buy), spec bar, why-different grid, collapsible table of
   contents, audience, get-the-book CTA, imprint.
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Hero
   -------------------------------------------------------------------------- */

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

.hero-content {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 200px 1fr minmax(220px, 300px);
  gap: var(--s-6);
  align-items: start;
}

.hero-book {
  display: block;
  align-self: center;
  animation: hero-rise 0.7s ease-out 0.15s both;
}
.hero-book img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 6px;
  border: 1px solid var(--line);
  box-shadow: 0 24px 48px -16px rgba(0, 0, 0, 0.55);
  transform: rotate(1.5deg);
  transition: transform 0.25s ease;
}
.hero-book:hover img { transform: rotate(0deg) scale(1.015); }

@keyframes hero-rise {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

.hero-meta,
.hero-cover,
.hero h1,
.hero-tagline,
.hero-body > p,
.hero-author,
.hero-buy {
  animation: hero-rise 0.7s cubic-bezier(0.22, 1, 0.36, 1) backwards;
}

.hero-cover              { animation-delay: 0s; }
.hero h1                 { animation-delay: 0.05s; }
.hero-tagline            { animation-delay: 0.18s; }
.hero-pitch              { animation-delay: 0.30s; }
.hero-author             { animation-delay: 0.38s; }
.hero-buy                { animation-delay: 0.46s; }
.hero-meta               { animation-delay: 0.48s; }

.hero-meta {
  font-family: var(--font-mono);
  font-size: var(--t-xs);
  color: var(--ink-3);
  letter-spacing: 0.06em;
  line-height: 1.7;
}
.hero-meta .num { color: var(--signal); display: block; margin-bottom: 4px; }
.hero-meta .label { text-transform: uppercase; letter-spacing: 0.12em; color: var(--ink-2); }
.hero-meta .wink { display: block; margin-top: 10px; font-size: var(--t-xxs); color: var(--ink-4); }

.hero-body { min-width: 0; }

.hero-cover {
  display: block;
  width: 84px;
  height: 84px;
  margin: 0 0 var(--s-4);
  user-select: none;
  -webkit-user-drag: none;
  border-radius: 18px;
  box-shadow: 0 18px 40px -20px color-mix(in srgb, var(--signal) 60%, transparent);
}

.hero h1 {
  font-family: var(--font-sans);
  font-size: clamp(48px, 7.5vw, 100px);
  line-height: 0.96;
  letter-spacing: -0.035em;
  font-weight: 600;
  margin: 0;
  color: var(--ink);
  text-wrap: balance;
}

.hero-tagline {
  font-family: var(--font-sans);
  font-size: clamp(20px, 2.4vw, 28px);
  font-weight: 500;
  line-height: 1.3;
  letter-spacing: -0.015em;
  color: var(--ink-2);
  margin: var(--s-5) 0 0;
  max-width: 46ch;
  text-wrap: balance;
}

.hero-pitch {
  font-family: var(--font-sans);
  font-size: var(--t-md);
  line-height: 1.6;
  color: var(--ink-2);
  margin: var(--s-5) 0 0;
  max-width: 62ch;
  text-wrap: pretty;
}

.hero-author {
  font-family: var(--font-mono);
  font-size: var(--t-xs);
  letter-spacing: 0.04em;
  color: var(--ink-3);
  margin: var(--s-4) 0 0;
}
.hero-author strong { color: var(--ink-2); font-weight: 500; }

/* --------------------------------------------------------------------------
   2. Buy block (in hero)
   -------------------------------------------------------------------------- */

.hero-buy {
  margin-top: var(--s-6);
  padding: var(--s-5);
  border: 1px solid var(--line);
  border-radius: var(--r-3);
  background: var(--paper-2);
  max-width: 620px;
}

.hero-price {
  display: flex;
  align-items: baseline;
  gap: var(--s-3);
  margin-bottom: var(--s-4);
}

.price-now {
  font-family: var(--font-sans);
  font-size: var(--t-3xl);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1;
  color: var(--ink);
}

.price-was {
  font-family: var(--font-mono);
  font-size: var(--t-md);
  color: var(--ink-3);
  text-decoration: line-through;
}

.price-tag {
  font-family: var(--font-mono);
  font-size: var(--t-xxs);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--signal-ink);
  background: var(--signal-soft);
  border: 1px solid color-mix(in srgb, var(--signal) 35%, transparent);
  border-radius: var(--r-1);
  padding: 3px 8px;
  align-self: center;
}

.hero-buttons {
  display: flex;
  gap: var(--s-3);
  flex-wrap: wrap;
}

.hero-buy-note {
  font-family: var(--font-mono);
  font-size: var(--t-xs);
  line-height: 1.6;
  color: var(--ink-3);
  margin: var(--s-4) 0 0;
}

/* --------------------------------------------------------------------------
   4. Sections shared
   -------------------------------------------------------------------------- */

.diff,
.toc-section,
.audience {
  padding: var(--s-9) 0 0;
}

/* inline code in prose */
code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: var(--r-1);
  padding: 1px 5px;
  color: var(--signal-ink);
  white-space: nowrap;
}

/* --------------------------------------------------------------------------
   5. Why this book is different
   -------------------------------------------------------------------------- */

.diff-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--ink);
}

.diff-card {
  padding: var(--s-6) var(--s-5) var(--s-6) 0;
  border-right: 1px solid var(--line);
}

.diff-card + .diff-card { padding-left: var(--s-5); }
.diff-card:last-child { border-right: 0; padding-right: 0; }

.diff-tag {
  font-family: var(--font-mono);
  font-size: var(--t-xs);
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--signal);
  margin-bottom: var(--s-3);
}

.diff-card h3 {
  font-family: var(--font-sans);
  font-size: var(--t-xl);
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: 0 0 var(--s-3);
  color: var(--ink);
}

.diff-card p {
  font-family: var(--font-sans);
  font-size: var(--t-sm);
  line-height: 1.65;
  color: var(--ink-2);
  margin: 0;
}

/* --------------------------------------------------------------------------
   6. Table of contents — collapsible parts
   -------------------------------------------------------------------------- */

.toc-preface {
  display: grid;
  grid-template-columns: 92px 1fr;
  gap: var(--s-4);
  align-items: baseline;
  border-top: 1px solid var(--ink);
  padding: var(--s-4) 0;
  border-bottom: 1px solid var(--line);
}

.toc-preface .toc-kicker {
  font-family: var(--font-mono);
  font-size: var(--t-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--signal);
}

.toc-preface h3 {
  font-family: var(--font-sans);
  font-size: var(--t-md);
  font-weight: 600;
  letter-spacing: -0.015em;
  color: var(--ink);
  margin: 0;
}

.toc-part {
  border-bottom: 1px solid var(--line);
}

.toc-summary {
  display: grid;
  grid-template-columns: 92px 1fr auto;
  gap: var(--s-4);
  align-items: baseline;
  padding: var(--s-4) 0;
  cursor: pointer;
  list-style: none;
  transition: color 0.15s ease;
}

.toc-summary::-webkit-details-marker { display: none; }
.toc-summary:focus-visible { outline: 2px solid var(--signal); outline-offset: 3px; }

.toc-part-num {
  font-family: var(--font-mono);
  font-size: var(--t-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--signal);
}

.toc-part-title {
  font-family: var(--font-sans);
  font-size: var(--t-lg);
  font-weight: 600;
  letter-spacing: -0.015em;
  color: var(--ink);
}

.toc-summary:hover .toc-part-title { color: var(--signal); }

.toc-part-aside {
  display: inline-flex;
  align-items: center;
  gap: var(--s-3);
  font-family: var(--font-mono);
  font-size: var(--t-xs);
  color: var(--ink-3);
  white-space: nowrap;
}

.toc-chevron {
  width: 12px;
  height: 12px;
  stroke: var(--ink-3);
  stroke-width: 1.6;
  fill: none;
  transition: transform 0.2s ease;
}

.toc-part[open] .toc-chevron { transform: rotate(180deg); }
.toc-summary:hover .toc-chevron { stroke: var(--signal); }

.toc-chapters {
  list-style: none;
  margin: 0;
  padding: 0 0 var(--s-5) 92px;
  columns: 2;
  column-gap: var(--s-7);
}

.toc-chapters li {
  display: flex;
  gap: var(--s-3);
  align-items: baseline;
  padding: 5px 0;
  font-family: var(--font-sans);
  font-size: var(--t-sm);
  color: var(--ink-2);
  break-inside: avoid;
}

.toc-chapters .ch-num {
  font-family: var(--font-mono);
  font-size: var(--t-xs);
  color: var(--ink-4);
  min-width: 1.6em;
  text-align: right;
  flex-shrink: 0;
}

.toc-appendix .ch-num { text-transform: none; }

/* --------------------------------------------------------------------------
   7. Who it's for
   -------------------------------------------------------------------------- */

.audience-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  border-top: 1px solid var(--ink);
}

.audience-col {
  padding: var(--s-6) var(--s-6) var(--s-6) 0;
  border-right: 1px solid var(--line);
}
.audience-col + .audience-col { padding-left: var(--s-6); border-right: 0; padding-right: 0; }

.audience-label {
  font-family: var(--font-mono);
  font-size: var(--t-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--s-4);
}
.audience-col--yes .audience-label { color: var(--signal); }
.audience-col--no .audience-label { color: var(--ink-3); }

.audience-col ul {
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-sans);
  font-size: var(--t-md);
  line-height: 1.5;
  color: var(--ink-2);
}

.audience-col li {
  display: flex;
  gap: var(--s-3);
  padding: var(--s-2) 0;
}

.audience-col li::before {
  font-family: var(--font-mono);
  flex-shrink: 0;
}
.audience-col--yes li::before { content: "+"; color: var(--signal); }
.audience-col--no li::before { content: "−"; color: var(--ink-4); }

/* --------------------------------------------------------------------------
   8. Get-the-book CTA
   -------------------------------------------------------------------------- */

.cta {
  position: relative;
  margin-top: var(--s-9);
  background: var(--ink);
  color: var(--paper);
  padding: var(--s-9) 0;
  overflow: hidden;
}

[data-theme="dark"] .cta { background: var(--paper-2); color: var(--ink); }

.cta::after {
  content: "";
  position: absolute;
  right: -10%;
  bottom: -40%;
  width: 55%;
  height: 100%;
  background: radial-gradient(ellipse at center,
    color-mix(in srgb, #c084fc 18%, transparent) 0%, transparent 65%);
  pointer-events: none;
}

.cta .container { position: relative; z-index: 1; }

.cta-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s-6) var(--s-7);
  align-items: end;
}

.cta-content h2 {
  font-family: var(--font-sans);
  font-size: clamp(36px, 5vw, 64px);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1;
  margin: 0;
  color: var(--paper);
}
[data-theme="dark"] .cta-content h2 { color: var(--ink); }

.cta-content p {
  font-family: var(--font-sans);
  font-size: var(--t-md);
  line-height: 1.5;
  color: var(--paper-3);
  margin: 0;
  max-width: 52ch;
}
[data-theme="dark"] .cta-content p { color: var(--ink-2); }

.cta-price {
  display: flex;
  align-items: baseline;
  gap: var(--s-3);
  grid-column: 1 / -1;
}

.cta-price .now {
  font-family: var(--font-sans);
  font-size: var(--t-2xl);
  font-weight: 600;
  letter-spacing: -0.03em;
  color: #c084fc;
}
[data-theme="dark"] .cta-price .now { color: var(--signal); }

.cta-price .was {
  font-family: var(--font-mono);
  font-size: var(--t-base);
  color: var(--ink-3);
  text-decoration: line-through;
}

.cta-price .tag {
  font-family: var(--font-mono);
  font-size: var(--t-xxs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--paper-3);
  background: transparent;
  border: 1px solid var(--ink-3);
  border-radius: var(--r-1);
  padding: 3px 8px;
  align-self: center;
}
[data-theme="dark"] .cta-price .tag { color: var(--ink-2); border-color: var(--line-strong); }

.cta-buttons {
  grid-column: 1 / -1;
  display: flex;
  gap: var(--s-3);
  flex-wrap: wrap;
  padding-top: var(--s-5);
  border-top: 1px solid var(--line-strong);
}

.cta .btn-primary {
  background: #c084fc;
  color: #1a0b28;
  border-color: #c084fc;
}
.cta .btn-primary:hover {
  background: #d0a2ff;
  border-color: #d0a2ff;
  color: #1a0b28;
}

.cta .btn-secondary {
  background: transparent;
  color: var(--paper);
  border-color: var(--ink-3);
}
.cta .btn-secondary:hover {
  background: var(--paper-3);
  color: var(--ink);
  border-color: var(--paper-3);
}
[data-theme="dark"] .cta .btn-secondary { color: var(--ink); border-color: var(--line-strong); }
[data-theme="dark"] .cta .btn-secondary:hover { background: var(--paper-3); border-color: var(--ink-3); }

.cta-reqs {
  grid-column: 1 / -1;
  font-size: var(--t-xs);
  line-height: 1.7;
  letter-spacing: 0.03em;
  color: var(--ink-4);
  margin-top: var(--s-3);
}
[data-theme="dark"] .cta-reqs { color: var(--ink-3); }

/* --------------------------------------------------------------------------
   9. Imprint (subpage)
   -------------------------------------------------------------------------- */

.p-section { padding: var(--s-9) 0; }

.backlink {
  font-family: var(--font-mono);
  font-size: var(--t-xs);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-3);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.backlink:hover { color: var(--signal); }

.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); }
.imprint-details .detail-group { margin: 0; }

/* --------------------------------------------------------------------------
   10. Responsive
   -------------------------------------------------------------------------- */

@media (max-width: 900px) {
  .hero { padding: var(--s-7) 0 var(--s-7); }
  .hero-content { grid-template-columns: 1fr; gap: var(--s-4); }
  .hero-book { max-width: 240px; margin: 0 auto; }
  .hero h1 { font-size: clamp(40px, 11vw, 68px); }
  .hero-tagline { font-size: 20px; }

  .diff, .toc-section, .audience { padding-top: var(--s-7); }
  .cta { margin-top: var(--s-7); padding: var(--s-7) 0; }

  .diff-grid { grid-template-columns: 1fr; }
  .diff-card {
    border-right: 0;
    border-bottom: 1px solid var(--line);
    padding: var(--s-5) 0;
  }
  .diff-card + .diff-card { padding-left: 0; }
  .diff-card:last-child { border-bottom: 0; }

  .toc-chapters { columns: 1; padding-left: 92px; }

  .audience-grid { grid-template-columns: 1fr; }
  .audience-col {
    border-right: 0;
    border-bottom: 1px solid var(--line);
    padding: var(--s-5) 0;
  }
  .audience-col + .audience-col { padding-left: 0; border-bottom: 0; }

  .cta-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); }
}

@media (max-width: 560px) {
  .toc-summary { grid-template-columns: 1fr auto; }
  .toc-part-num { grid-column: 1 / -1; }
  .toc-preface { grid-template-columns: 1fr; gap: var(--s-1); }
  .toc-chapters { padding-left: 0; }
  .hero-price { flex-wrap: wrap; }
}

/* --------------------------------------------------------------------------
   11. Reduced motion
   -------------------------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  .hero-meta, .hero-cover, .hero h1, .hero-tagline,
  .hero-body > p, .hero-author, .hero-buy {
    animation: none !important;
  }
  .toc-chevron { transition: none !important; }
}

/* ── Consulting note ─────────────────────────────────────────── */
.consulting {
    padding: 3rem 0;
    border-top: 1px solid var(--line);
}
.consulting-note {
    text-align: center;
    font-size: 1.05rem;
    color: var(--ink-2);
    max-width: 46rem;
    margin: 0 auto;
}
.consulting-note a {
    color: var(--signal);
    font-weight: 600;
    text-decoration: underline;
    text-underline-offset: 3px;
}

/* ── Footer trademark note ───────────────────────────────────── */
.footer-trademark {
    font-size: 0.8rem;
    color: var(--ink-3, #8a8a8a);
    text-align: center;
    max-width: 44rem;
    margin: 0 auto 1.5rem;
}
.footer-trademark a { color: inherit; text-decoration: underline; }

/* ── Podman 6 version badge ──────────────────────────────────── */
.hero-version { margin: 0 0 var(--s-4); }
.badge-v6 {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: var(--t-xs);
    letter-spacing: 0.05em;
    color: var(--signal);
    border: 1px solid var(--signal);
    border-radius: 999px;
    padding: 0.3rem 0.85rem;
    background: color-mix(in srgb, var(--signal) 8%, transparent);
}