:root {
  --primary: #6366f1;
  --accent: #4f46e5;
  --background: #05050a;
  --surface: #18181b;
  --surface-strong: rgba(24, 24, 27, 0.92);
  --text-primary: #ffffff;
  --text-secondary: #a1a1aa;
  --border: #27272a;
  --shadow: 0 24px 80px rgba(5, 5, 10, 0.42);
  --radius-card: 8px;
  --radius-control: 8px;
  --radius-pill: 9999px;
  --transition: 320ms cubic-bezier(0.22, 1, 0.36, 1);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: "Inter", system-ui, sans-serif;
  color: var(--text-primary);
  background:
    radial-gradient(circle at 18% 8%, rgba(99, 102, 241, 0.18), transparent 28%),
    radial-gradient(circle at 84% 14%, rgba(79, 70, 229, 0.14), transparent 26%),
    radial-gradient(circle at 50% 100%, rgba(99, 102, 241, 0.08), transparent 30%),
    var(--background);
}

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

.container {
  width: min(calc(100% - 32px), 1200px);
  margin: 0 auto;
}

.page {
  padding: 36px 0 72px;
}

.topbar {
  margin-bottom: 28px;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(24, 24, 27, 0.78);
  color: rgba(255, 255, 255, 0.92);
  font-family: "JetBrains Mono", monospace;
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  transition: transform var(--transition), border-color var(--transition), background var(--transition);
}

.back-link:hover,
.back-link:focus-visible {
  transform: translateY(-1px);
  border-color: rgba(255, 255, 255, 0.34);
  background: rgba(79, 70, 229, 0.2);
}

.hero {
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-card);
  background:
    linear-gradient(140deg, rgba(24, 24, 27, 0.96), rgba(10, 10, 16, 0.96)),
    var(--surface);
  box-shadow: var(--shadow);
  padding: clamp(22px, 4vw, 46px);
}

.hero::before {
  content: "";
  position: absolute;
  inset: -2px;
  pointer-events: none;
  background: radial-gradient(circle at 20% 0%, rgba(99, 102, 241, 0.14), transparent 30%);
}

.eyebrow {
  margin: 0 0 14px;
  font-family: "JetBrains Mono", monospace;
  color: var(--text-secondary);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  position: relative;
  z-index: 1;
}

h1 {
  margin: 0;
  max-width: 16ch;
  font-size: clamp(2.2rem, 5vw, 4rem);
  font-weight: 500;
  line-height: 1.04;
  letter-spacing: -0.03em;
  position: relative;
  z-index: 1;
}

.subtitle {
  margin: 14px 0 0;
  max-width: 74ch;
  color: rgba(255, 255, 255, 0.9);
  font-family: "Playfair Display", Georgia, serif;
  font-size: clamp(1rem, 1.75vw, 1.18rem);
  line-height: 1.6;
  position: relative;
  z-index: 1;
}

.meta-band {
  position: relative;
  z-index: 1;
  margin-top: 20px;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.meta-pill {
  display: inline-flex;
  align-items: center;
  padding: 7px 12px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(24, 24, 27, 0.65);
  color: rgba(255, 255, 255, 0.92);
  font-family: "JetBrains Mono", monospace;
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.lead-copy {
  margin: 18px 0 0;
  max-width: 72ch;
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.98rem;
  line-height: 1.7;
  position: relative;
  z-index: 1;
}

.flipbook-wrap {
  margin-top: 30px;
  position: relative;
  z-index: 1;
}

.flipbook-outer {
  position: relative;
  width: 100%;
  min-height: 360px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: var(--radius-card);
  background:
    radial-gradient(circle at top left, rgba(99, 102, 241, 0.12), transparent 44%),
    var(--surface-strong);
  overflow: hidden;
}

#flipbook {
  width: 100%;
  height: 100%;
}

.fb-cover-btn {
  position: absolute;
  inset: 0;
  z-index: 8;
  border: 0;
  padding: 0;
  background: transparent;
  cursor: pointer;
}

.fb-cover-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.fb-cover-overlay {
  position: absolute;
  left: 50%;
  bottom: 18px;
  transform: translateX(-50%);
  width: min(92%, 400px);
  text-align: center;
  padding: 10px 14px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(5, 5, 10, 0.7);
  color: #fff;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.flipbook-loading {
  position: absolute;
  inset: 0;
  z-index: 7;
  display: grid;
  place-content: center;
  gap: 16px;
  padding: 24px;
  text-align: center;
  background: rgba(5, 5, 10, 0.64);
  backdrop-filter: blur(2px);
}

.fb-spinner {
  margin: 0 auto;
  animation: fb-spin 1.2s linear infinite;
}

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

.fb-progress-bar-wrap {
  width: min(340px, 80vw);
  height: 7px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(5, 5, 10, 0.35);
  overflow: hidden;
}

.fb-progress-bar {
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, #818cf8, var(--accent));
  transition: width 280ms ease;
}

.fb-hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.flipbook-controls {
  margin-top: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
}

.fb-btn,
.fb-expand-btn,
.fb-modal-close {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: var(--radius-control);
  padding: 10px 16px;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.78rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  font-weight: 600;
  background: rgba(24, 24, 27, 0.9);
  color: #fff;
  cursor: pointer;
  transition: transform var(--transition), border-color var(--transition), background var(--transition);
}

.fb-btn:hover,
.fb-expand-btn:hover,
.fb-modal-close:hover,
.fb-btn:focus-visible,
.fb-expand-btn:focus-visible,
.fb-modal-close:focus-visible {
  transform: translateY(-1px);
  border-color: rgba(255, 255, 255, 0.38);
  background: rgba(79, 70, 229, 0.24);
}

.fb-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none;
}

.fb-page-info {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.86);
  letter-spacing: 0.03em;
}

.fb-expand-btn {
  position: absolute;
  right: 14px;
  bottom: 14px;
  z-index: 6;
}

.fb-modal {
  position: fixed;
  inset: 0;
  z-index: 80;
  display: grid;
  place-items: center;
}

.fb-modal[hidden] {
  display: none;
}

.fb-modal-backdrop {
  position: absolute;
  inset: 0;
  border: 0;
  background: rgba(5, 5, 10, 0.86);
}

.fb-modal-shell {
  position: relative;
  z-index: 1;
  width: min(96vw, 1700px);
  max-height: 95vh;
  border-radius: var(--radius-card);
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: linear-gradient(160deg, rgba(24, 24, 27, 0.97), rgba(10, 10, 16, 0.97));
  padding: clamp(16px, 2vw, 24px);
  box-shadow: 0 36px 90px rgba(0, 0, 0, 0.6);
  display: grid;
  gap: 14px;
}

.fb-modal-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.fb-modal-title {
  margin: 0;
  color: rgba(255, 255, 255, 0.86);
  font-family: "JetBrains Mono", monospace;
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

#fbModalFlipbook {
  min-height: clamp(420px, 70vh, 78vh);
  display: grid;
  place-items: center;
}

.fb-modal-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

@media (max-width: 768px) {
  .page {
    padding-top: 24px;
  }

  h1 {
    max-width: none;
  }

  .flipbook-outer {
    min-height: 300px;
  }

  .fb-cover-overlay {
    font-size: 0.72rem;
    letter-spacing: 0.04em;
  }
}