:root {
  --bg: #081018;
  --bg-soft: #0c1623;
  --text: #f8f8f8;
  --muted: #b9c3ce;
  --accent: #00d8b0;
  --border: #1b2937;
  --max-width: 1120px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Inter, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
}

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

.container {
  width: min(var(--max-width), 92vw);
  margin: 0 auto;
}

.narrow {
  width: min(780px, 92vw);
}

.section {
  padding: 5.5rem 0;
}

.section-contrast {
  background: var(--bg-soft);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.site-header {
  position: sticky;
  top: 0;
  backdrop-filter: blur(8px);
  background: rgba(8, 16, 24, 0.82);
  border-bottom: 1px solid var(--border);
  z-index: 20;
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 4.5rem;
}

.brand {
  font-weight: 700;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.site-nav {
  display: flex;
  gap: 1rem;
  color: var(--muted);
  font-size: 0.95rem;
}

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

h1,
h2,
h3 {
  line-height: 1.15;
  margin: 0 0 1rem;
}

h1 {
  font-size: clamp(2rem, 5vw, 3.6rem);
  max-width: 16ch;
}

h2 {
  font-size: clamp(1.5rem, 3vw, 2.2rem);
}

h3 {
  font-size: 1.15rem;
}

p {
  margin: 0 0 1rem;
  color: var(--muted);
}

.eyebrow {
  color: var(--accent);
  letter-spacing: 0.16em;
  font-size: 0.75rem;
  font-weight: 700;
  margin-bottom: 0.8rem;
}

.accent {
  color: var(--accent);
}

.lead {
  max-width: 60ch;
  font-size: 1.05rem;
}

.lead-small {
  max-width: 66ch;
}

.hero {
  padding-top: 4.5rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.25fr 1fr;
  gap: 2.2rem;
  align-items: center;
}

.hero-actions {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.8rem;
  margin-top: 1.6rem;
  width: 100%;
  max-width: 560px;
}

.micro-proof {
  margin: 0;
  font-size: 0.9rem;
}

.hero-form {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  width: 100%;
}

.hero-form input {
  flex: 1 1 260px;
  min-width: 240px;
  height: 48px;
  padding: 0.75rem 0.88rem;
  background: #f8f8f8;
  color: #111827;
  border: 1px solid #a4b1be;
  border-radius: 0.5rem;
}

.hero-form input::placeholder {
  color: #64748b;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 0.5rem;
  border: 1px solid transparent;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.15s ease, opacity 0.15s ease;
}

.btn:hover {
  transform: translateY(-1px);
  opacity: 0.95;
}

.btn-primary {
  background: var(--accent);
  color: #081018;
  padding: 0.72rem 1.05rem;
}

.btn-lg {
  padding: 0.9rem 1.3rem;
}

.book-panel {
  display: flex;
  justify-content: center;
}

.cover-hero {
  width: min(430px, 100%);
  aspect-ratio: 210 / 297;
  border: 2px solid #131a25;
  border-radius: 0.6rem;
  position: relative;
  overflow: hidden;
  box-shadow:
    0 18px 34px rgba(0, 0, 0, 0.38),
    10px 0 0 0 #0e1521;
  background: linear-gradient(180deg, #f7f9fb, #f2f4f7);
}

.cover-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  border-left: 6px solid #101827;
  pointer-events: none;
}

.cover-hero::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 16px;
  background: linear-gradient(
    90deg,
    rgba(16, 24, 39, 0.2),
    rgba(16, 24, 39, 0.06),
    rgba(16, 24, 39, 0)
  );
  pointer-events: none;
}

.cover-arc {
  position: absolute;
  right: -30px;
  top: 20px;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  border: 1px solid rgba(0, 168, 130, 0.2);
  animation: coverPulse 4s ease-in-out infinite;
}

.cover-arc-2 {
  right: -58px;
  top: -12px;
  width: 360px;
  height: 360px;
  border-color: rgba(0, 168, 130, 0.12);
  animation-delay: 0.7s;
}

.cover-arc-3 {
  right: -90px;
  top: -42px;
  width: 430px;
  height: 430px;
  border-color: rgba(17, 24, 39, 0.08);
  animation-delay: 1.4s;
}

@keyframes coverPulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.45;
  }
}

.cover-accent-bar {
  position: absolute;
  left: 30px;
  top: 32px;
  width: 3px;
  height: 42px;
  background: var(--accent);
}

.cover-top-label {
  position: absolute;
  left: 47px;
  top: 40px;
  margin: 0;
  color: var(--accent);
  font-family: "Courier New", Courier, monospace;
  font-size: 10px;
  letter-spacing: 0.18em;
}

.cover-dot-grid {
  position: absolute;
  right: 34px;
  top: 96px;
  display: grid;
  grid-template-columns: repeat(5, 8px);
  gap: 7px;
  opacity: 0.32;
}

.cover-dot-grid span {
  width: 2px;
  height: 2px;
  border-radius: 50%;
  display: block;
  background: rgba(17, 24, 39, 0.32);
}

.cover-content {
  position: absolute;
  left: 32px;
  right: 32px;
  top: 96px;
}

.cover-title-the {
  margin: 0 0 2px;
  color: rgba(17, 24, 39, 0.36);
  font-family: Georgia, "Times New Roman", serif;
  font-style: italic;
  font-size: clamp(1.2rem, 2vw, 1.6rem);
}

.cover-title-main {
  margin: 0 0 2px;
  color: #0f172a;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(2rem, 4.5vw, 3.75rem);
  font-weight: 700;
  line-height: 0.94;
}

.cover-title-main span {
  color: var(--accent);
}

.cover-title-sub {
  margin: 0;
  color: rgba(17, 24, 39, 0.78);
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.8rem, 3.95vw, 3rem);
  font-weight: 700;
  line-height: 0.98;
}

.cover-divider {
  margin: 22px 0 16px;
  width: 52px;
  height: 1px;
  background: rgba(0, 216, 176, 0.6);
}

.cover-subtitle {
  margin: 0;
  max-width: 250px;
  color: rgba(17, 24, 39, 0.52);
  font-weight: 300;
  font-size: clamp(0.82rem, 1.35vw, 0.98rem);
}

.cover-waveform {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 62px;
  width: 100%;
  opacity: 0.95;
}

.cover-chapter-marks {
  position: absolute;
  right: 34px;
  bottom: 74px;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 4px;
}

.cover-chapter-marks span {
  width: 20px;
  height: 1px;
  background: rgba(17, 24, 39, 0.16);
}

.cover-chapter-marks span:first-child {
  width: 32px;
  background: rgba(0, 216, 176, 0.66);
}

.cover-bottom-band {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 54px;
  border-top: 1px solid rgba(17, 24, 39, 0.12);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 32px;
  background: rgba(255, 255, 255, 0.86);
}

.cover-author-name,
.cover-edition-mark {
  margin: 0;
}

.cover-author-name {
  color: rgba(17, 24, 39, 0.7);
  font-size: 0.95rem;
}

.cover-edition-mark {
  color: rgba(0, 168, 130, 0.75);
  text-align: right;
  font-family: "Courier New", Courier, monospace;
  font-size: 0.63rem;
  letter-spacing: 0.12em;
  line-height: 1.5;
}

.pain-list {
  list-style: none;
  padding: 0;
  margin: 0 0 1.4rem;
}

.pain-list li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 0.6rem;
  color: var(--text);
}

.pain-list li::before {
  content: "•";
  color: var(--accent);
  position: absolute;
  left: 0.3rem;
}

.two-col {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 1.6rem;
}

.callout {
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  border-radius: 0.7rem;
  padding: 1rem;
  background: rgba(255, 255, 255, 0.01);
}

.callout-image-panel {
  padding: 0.55rem;
  border-left-width: 1px;
}

.thread-slideshow {
  position: relative;
}

.callout-image {
  display: none;
  width: 100%;
  height: auto;
  border-radius: 0.45rem;
}

.callout-image.is-active {
  display: block;
}

.slideshow-controls {
  position: absolute;
  right: 0.55rem;
  bottom: 0.55rem;
  display: flex;
  gap: 0.35rem;
}

.slide-btn {
  border: 1px solid rgba(255, 255, 255, 0.26);
  background: rgba(8, 16, 24, 0.8);
  color: var(--text);
  font-size: 0.72rem;
  border-radius: 0.36rem;
  padding: 0.2rem 0.46rem;
  cursor: pointer;
}

.slide-btn:hover {
  border-color: var(--accent);
}

.callout-title {
  color: var(--text);
  font-weight: 700;
}

.author-story {
  margin-top: 1.4rem;
  color: var(--muted);
}

.author-avatar-frame {
  float: left;
  width: 128px;
  height: 128px;
  border-radius: 0.7rem;
  border: 1px solid #2a4257;
  margin: 0.2rem 1rem 0.7rem 0;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0)),
    radial-gradient(circle at 30% 25%, rgba(0, 216, 176, 0.2), rgba(0, 216, 176, 0.04) 55%);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.author-avatar-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.author-greeting {
  color: var(--text);
  font-weight: 600;
}

.inline-link {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.author-reasons {
  margin: 0.6rem 0 0;
  padding-left: 1.1rem;
  color: var(--muted);
}

.author-reasons li {
  margin-bottom: 0.45rem;
}

.toc-card {
  margin-top: 1.15rem;
  padding: 1.1rem;
  border: 1px solid #234154;
  border-radius: 0.85rem;
  background: rgba(9, 20, 32, 0.92);
}

.toc-part {
  margin: 0.4rem 0 0.6rem;
  color: var(--text);
  font-weight: 700;
  letter-spacing: 0.02em;
}

.toc-list {
  list-style: none;
  margin: 0 0 0.9rem;
  padding: 0;
}

.toc-list li {
  display: flex;
  gap: 0.7rem;
  align-items: baseline;
  margin-bottom: 0.4rem;
  color: var(--muted);
  border-bottom: 1px dotted rgba(185, 195, 206, 0.28);
  padding-bottom: 0.22rem;
}

.toc-list li span:first-child {
  flex: 1;
}

.toc-list li span:last-child {
  color: var(--text);
  font-family: "Courier New", Courier, monospace;
  font-size: 0.9rem;
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.project-visual {
  margin: 1.2rem 0 1.35rem;
  border: 1px solid #2a4257;
  border-radius: 0.85rem;
  padding: 0.7rem;
  background: rgba(4, 12, 20, 0.45);
}

.project-visual img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 0.55rem;
}

.project-visual figcaption {
  margin: 0.6rem 0 0.05rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.project-scale .ops-tier {
  font-weight: 800;
}

.project-scale .ops-event-sizes {
  font-weight: 800;
  color: #93c5fd;
}

.ops-tier-small {
  color: #4ade80;
}

.ops-tier-mid {
  color: #22d3ee;
}

.ops-tier-large {
  color: #fbbf24;
}

.ops-tier-extreme {
  color: #f87171;
}

.project-grid article {
  margin: 0;
  border: 1px solid var(--border);
  border-radius: 0.7rem;
  padding: 1rem;
  background: rgba(255, 255, 255, 0.01);
}

.chip-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.chip-grid span {
  border: 1px solid #184656;
  color: var(--text);
  padding: 0.4rem 0.75rem;
  border-radius: 999px;
  font-size: 0.9rem;
}

.grid-cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.9rem;
}

.grid-cards article {
  border: 1px solid var(--border);
  border-radius: 0.7rem;
  padding: 1rem;
  background: rgba(255, 255, 255, 0.01);
}

.three-col {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.three-col article,
.three-col blockquote {
  margin: 0;
  border: 1px solid var(--border);
  border-radius: 0.7rem;
  padding: 1rem;
  background: rgba(255, 255, 255, 0.01);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.1rem;
  margin-top: 1.7rem;
  align-items: stretch;
}

.pricing-subtitle {
  max-width: 58ch;
  margin: 0 auto;
  text-align: center;
}

#pricing h2 {
  text-align: center;
}

.pricing-offer {
  margin: 0.75rem auto 0;
  text-align: center;
  color: #0f172a;
  background: #d1fae5;
  border: 1px solid #6ee7b7;
  border-radius: 999px;
  width: fit-content;
  padding: 0.38rem 0.82rem;
  font-size: 0.9rem;
  font-weight: 600;
}

.price-card {
  border: 1px solid #2b3c4d;
  border-radius: 0.95rem;
  padding: 1.15rem;
  background: #ffffff;
  color: #0f172a;
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.14);
  display: flex;
  flex-direction: column;
}

.price-card.featured {
  border-color: #00b594;
  box-shadow:
    0 0 0 1px rgba(0, 216, 176, 0.3) inset,
    0 12px 30px rgba(0, 0, 0, 0.2);
  transform: translateY(-4px);
}

.tier-label {
  width: fit-content;
  margin: 0 0 1.1rem;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  background: rgba(0, 216, 176, 0.16);
  color: #045f53;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.03em;
}

.price-card h3 {
  margin-bottom: 0.45rem;
  color: #0f172a;
}

.price {
  display: flex;
  align-items: baseline;
  gap: 0.55rem;
  color: #0f172a;
  font-size: 2.5rem;
  font-weight: 700;
  line-height: 1;
  margin-bottom: 0.45rem;
}

.price-original {
  font-size: 1.05rem;
  font-weight: 600;
  color: #64748b;
  text-decoration: line-through;
}

.price-discount {
  color: #0f172a;
}

.price-note {
  color: #475569;
  font-size: 0.9rem;
  margin-bottom: 0.8rem;
}

.price-card ul {
  margin: 0 0 1.05rem;
  padding-left: 1rem;
  flex: 1;
}

.price-card li {
  margin-bottom: 0.45rem;
  color: #334155;
}

details {
  border: 1px solid var(--border);
  border-radius: 0.6rem;
  padding: 0.85rem 0.95rem;
  margin-bottom: 0.7rem;
  background: rgba(255, 255, 255, 0.01);
}

summary {
  cursor: pointer;
  font-weight: 600;
}

.final-cta {
  text-align: center;
}

.cta-form {
  display: flex;
  justify-content: center;
  gap: 0.65rem;
  flex-wrap: wrap;
  margin-top: 1rem;
}

.cta-form input {
  min-width: min(460px, 92vw);
  padding: 0.78rem 0.9rem;
  background: #0b1724;
  color: var(--text);
  border: 1px solid #244156;
  border-radius: 0.5rem;
}

.form-helper {
  margin-top: 0.7rem;
  font-size: 0.92rem;
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.3rem 0 2rem;
}

.footer-wrap {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.footer-wrap p {
  margin: 0;
  font-size: 0.9rem;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

@media (max-width: 980px) {
  .site-nav {
    display: none;
  }

  .hero-grid,
  .two-col,
  .project-grid,
  .three-col,
  .pricing-grid {
    grid-template-columns: 1fr;
  }

  .cover-hero {
    width: min(380px, 100%);
    box-shadow:
      0 14px 28px rgba(0, 0, 0, 0.34),
      8px 0 0 0 #0e1521;
  }

  .hero-form input {
    width: 100%;
  }

  .author-avatar-frame {
    float: none;
    width: 112px;
    height: 112px;
    margin: 0 0 0.85rem;
  }
}