:root {
  --bg: #0b0c0f;
  --bg-elevated: rgba(17, 19, 24, 0.55);
  --bg-card: rgba(20, 22, 28, 0.6);
  --accent: #dc5428;
  --accent-light: #e8734a;
  --accent-dim: rgba(220, 84, 40, 0.12);
  --accent2: #0ca6cf;
  --accent2-light: #2dbde3;
  --accent2-dim: rgba(12, 166, 207, 0.12);
  --text: #e2e0db;
  --text-dim: #8a877f;
  --text-faint: #5a584f;
  --border: rgba(255,255,255,0.06);
  --serif: 'Calibri', 'Trebuchet MS', Arial, sans-serif;
  --sans: 'DM Sans', -apple-system, sans-serif;
  --mono: 'IBM Plex Mono', monospace;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

::selection { background: var(--accent); color: var(--bg); }

/* ─── NAV ─── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 0 3.5rem;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(11, 12, 15, 0.7);
  backdrop-filter: blur(24px) saturate(1.2);
  -webkit-backdrop-filter: blur(24px) saturate(1.2);
  border-bottom: 1px solid var(--border);
  transition: background 0.4s;
}

.nav-brand {
  font-family: var(--serif);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text);
  text-decoration: none;
  letter-spacing: 0.5px;
}

.nav-brand span { color: var(--accent2); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 2.2rem;
  list-style: none;
}

.nav-links a {
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-dim);
  text-decoration: none;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  transition: color 0.3s;
}

.nav-links a:hover { color: var(--accent2); }

.nav-cta {
  font-size: 0.72rem !important;
  font-weight: 600 !important;
  color: var(--accent2) !important;
  border: 1px solid var(--accent2);
  padding: 0.5rem 1.4rem;
  border-radius: 4px;
  transition: all 0.3s !important;
}

.nav-cta:hover {
  background: var(--accent2) !important;
  color: var(--bg) !important;
}

.nav-mobile { display: none; cursor: pointer; background: none; border: none; padding: 6px; z-index: 1001; }
.nav-mobile svg { stroke: var(--text); }

@media (max-width: 960px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: rgba(11, 12, 15, 0.95);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-bottom: 1px solid var(--border);
    padding: 1rem 0;
  }
  .nav-links.open { display: flex; }
  .nav-links li {
    border-bottom: 1px solid var(--border);
  }
  .nav-links li:last-child { border-bottom: none; }
  .nav-links a {
    display: block;
    padding: 1rem 2rem;
    font-size: 0.85rem;
  }
  .nav-cta {
    margin: 1rem 2rem 0.5rem;
    text-align: center;
    display: block !important;
    border-radius: 4px;
  }
  .nav-mobile { display: block; }
}

/* ─── HERO ─── */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: transparent;
  z-index: 1;
}

.hero-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
}

#glitchCanvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.scanlines {
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0,0,0,0.08) 2px,
    rgba(0,0,0,0.08) 4px
  );
  pointer-events: none;
  z-index: 1;
  animation: scanFlicker 8s linear infinite;
}

@keyframes scanFlicker {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 0.25; }
  92% { opacity: 0.5; }
  93% { opacity: 0.5; }
  94% { opacity: 0.4; }
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(11,12,15,0.25) 0%, rgba(11,12,15,0.0) 35%, rgba(11,12,15,0.65) 100%);
  z-index: 3;
}

/* Grid pattern */
.hero-grid-pattern {
  position: absolute;
  inset: 0;
  z-index: 1;
  background-image:
    linear-gradient(rgba(255,255,255,0.015) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.015) 1px, transparent 1px);
  background-size: 80px 80px;
  mask-image: radial-gradient(ellipse 60% 50% at 30% 50%, black 0%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse 60% 50% at 30% 50%, black 0%, transparent 70%);
}

.hero-content {
  position: relative;
  z-index: 5;
  width: 100%;
  max-width: 1300px;
  margin: 0 auto;
  padding: 8rem 3.5rem 4rem;
  display: grid;
  grid-template-columns: 1fr 420px;
  gap: 5rem;
  align-items: center;
}

.hero-text { max-width: 580px; }

.hero-label {
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 400;
  color: var(--accent);
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
  opacity: 0;
  animation: fadeUp 0.9s 0.2s ease-out forwards;
}

.hero-title {
  font-family: var(--serif);
  font-size: clamp(3rem, 5.5vw, 4.8rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -1px;
  margin-bottom: 1.5rem;
  opacity: 0;
  animation: fadeUp 0.9s 0.35s ease-out forwards;
}

.hero-title em {
  font-style: italic;
  font-weight: 400;
  color: var(--accent2);
}

.hero-subtitle {
  font-size: 1.1rem;
  font-weight: 300;
  color: var(--text-dim);
  line-height: 1.7;
  margin-bottom: 0.8rem;
  opacity: 0;
  animation: fadeUp 0.9s 0.5s ease-out forwards;
}

.hero-author-line {
  font-family: var(--mono);
  font-size: 0.88rem;
  color: var(--text-dim);
  margin-bottom: 2.5rem;
  opacity: 0;
  animation: fadeUp 0.9s 0.6s ease-out forwards;
}

.hero-author-line strong { color: var(--text); font-weight: 500; }

.hero-cta-group {
  display: flex;
  gap: 1rem;
  align-items: center;
  opacity: 0;
  animation: fadeUp 0.9s 0.7s ease-out forwards;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--sans);
  font-weight: 600;
  text-decoration: none;
  transition: all 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  cursor: pointer;
  border: none;
}

.btn-primary {
  padding: 0.95rem 2.8rem;
  background: var(--accent);
  color: var(--bg);
  font-size: 0.85rem;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  border-radius: 3px;
}

.btn-primary:hover {
  background: var(--accent-light);
  transform: translateY(-1px);
  box-shadow: 0 8px 30px rgba(220,84,40,0.2);
}

.btn-ghost {
  padding: 0.95rem 1.5rem;
  color: var(--text-dim);
  font-size: 0.9rem;
  letter-spacing: 0.5px;
}

.btn-ghost:hover { color: var(--accent2); }



/* Book cover */
.hero-book {
  display: flex;
  justify-content: center;
  align-items: center;
  opacity: 0;
  animation: fadeUp 1.1s 0.5s ease-out forwards;
}

.book-3d {
  position: relative;
  perspective: 1200px;
}

.book-cover {
  width: 360px;
  background: #111318;
  border-radius: 2px 10px 10px 2px;
  box-shadow:
    -20px 20px 60px rgba(0,0,0,0.7),
    0 0 100px rgba(12,166,207,0.04),
    inset 0 1px 0 rgba(255,255,255,0.04);
  transform: rotateY(-12deg) rotateX(2deg);
  transition: transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  position: relative;
  overflow: hidden;
}

.book-cover:hover {
  transform: rotateY(-4deg) rotateX(1deg);
}

.book-cover-img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 2px 10px 10px 2px;
}

/* Book spine */
.book-cover::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 4px;
  background: linear-gradient(180deg, var(--accent), var(--accent2));
  z-index: 2;
}

/* Book cover image needs no texture overlay */

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(35px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ─── SECTION COMMON ─── */
.section { padding: 7rem 3.5rem; position: relative; z-index: 1; background: rgba(11, 12, 15, 0.5); }

.section-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.section-label {
  font-family: var(--mono);
  font-size: 0.68rem;
  color: var(--accent);
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-bottom: 1.2rem;
}

.section-heading {
  font-family: var(--serif);
  font-size: clamp(2.2rem, 4vw, 3.2rem);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.5px;
  margin-bottom: 1.5rem;
}

.divider {
  width: 50px;
  height: 1px;
  background: var(--accent);
  opacity: 0.4;
  margin: 3rem 0;
}

/* ─── BOOK OVERVIEW ─── */
.overview {
  background: var(--bg-elevated);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.overview-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: start;
}

.overview-text p {
  font-size: 1.12rem;
  color: var(--text-dim);
  line-height: 1.85;
  font-weight: 300;
  margin-bottom: 1.2rem;
}

.overview-text p:first-of-type::first-letter {
  font-family: var(--serif);
  font-size: 3.5rem;
  float: left;
  line-height: 0.8;
  margin-right: 0.6rem;
  margin-top: 0.15rem;
  color: var(--accent);
  font-weight: 600;
}

.toc-heading {
  font-family: var(--serif);
  font-size: 1.6rem;
  font-weight: 600;
  margin-bottom: 1.8rem;
}

.toc-list { list-style: none; }

.toc-item {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  padding: 0.7rem 0;
  border-bottom: 1px solid var(--border);
  transition: all 0.3s;
}

.toc-item:hover { padding-left: 0.5rem; }

.toc-num {
  font-family: var(--mono);
  font-size: 0.68rem;
  color: var(--accent2);
  min-width: 28px;
  opacity: 0.7;
}

.toc-name {
  font-size: 0.98rem;
  font-weight: 400;
  color: var(--text-dim);
  transition: color 0.3s;
}

.toc-item:hover .toc-name { color: var(--accent2); }

/* ─── ABOUT AUTHOR ─── */
.about-grid {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 4.5rem;
  align-items: center;
}

.about-photo-wrapper {
  position: relative;
}

.about-photo-wrapper::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(12, 166, 207, 0.15);
  filter: blur(40px);
  border-radius: 50%;
  transform: scale(0.75);
  transition: transform 0.7s, opacity 0.7s;
  opacity: 0.3;
  z-index: 0;
}

.about-photo-wrapper:hover::before {
  transform: scale(1);
  opacity: 0.5;
}

.about-photo {
  width: 100%;
  aspect-ratio: 4/5;
  position: relative;
  overflow: hidden;
  background: rgba(11, 12, 15, 0.9);
  padding: 8px;
  border: 1px solid rgba(61, 72, 78, 0.2);
  box-shadow: 0 25px 50px rgba(0,0,0,0.15);
  z-index: 1;
}

.about-photo .scanning-line {
  position: absolute;
  z-index: 10;
  pointer-events: none;
  width: 100%;
  height: 100px;
  background: linear-gradient(to bottom, transparent, rgba(12, 166, 207, 0.2), transparent);
  animation: photoScan 4s linear infinite;
}

@keyframes photoScan {
  0% { top: -100px; }
  100% { top: 100%; }
}

.author-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: grayscale(1) contrast(1.25);
  transition: filter 0.7s;
}

.about-photo-wrapper:hover .author-img { filter: grayscale(0) contrast(1); }

.about-photo-labels {
  position: absolute;
  bottom: 16px;
  right: 16px;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 4px;
  z-index: 11;
}

.about-photo-label {
  font-family: var(--mono);
  font-size: 0.6rem;
  padding: 3px 8px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.about-photo-label--primary {
  background: rgba(220, 84, 40, 0.85);
  color: #fff;
}

.about-photo-label--secondary {
  background: rgba(11, 12, 15, 0.7);
  color: var(--accent2-light);
  border: 1px solid rgba(12, 166, 207, 0.3);
}

.about-photo::after {
  content: '';
  position: absolute;
  inset: 8px;
  background: linear-gradient(180deg, transparent 65%, rgba(11,12,15,0.6));
  pointer-events: none;
  z-index: 5;
}

.about-name {
  font-family: var(--serif);
  font-size: 1.1rem;
  font-weight: 400;
  color: var(--text-dim);
  margin-bottom: 0.4rem;
}

.about-role {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--accent2);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 2rem;
}

.about-text p {
  font-size: 1rem;
  color: var(--text-dim);
  line-height: 1.85;
  font-weight: 300;
  margin-bottom: 1rem;
}

.about-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 1rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--accent2);
  text-decoration: none;
  transition: gap 0.3s;
}

.about-link:hover { gap: 0.8rem; }

/* ─── ENDORSEMENTS ─── */
.endorsements {
  background: var(--bg-elevated);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  overflow: hidden;
}

.endorsements-header {
  text-align: center;
  margin-bottom: 4rem;
}

.endorsements-track {
  display: flex;
  gap: 2rem;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scrollbar-width: none;
  padding-bottom: 1rem;
}

.endorsements-track::-webkit-scrollbar { display: none; }

.endorsement-card {
  min-width: 380px;
  max-width: 420px;
  flex-shrink: 0;
  scroll-snap-align: center;
  padding: 2.5rem;
  background: rgba(11, 12, 15, 0.7);
  border: 1px solid var(--border);
  border-radius: 8px;
  transition: border-color 0.3s;
}

.endorsement-card:hover { border-color: rgba(12,166,207,0.15); }

.endorsement-quote {
  font-family: var(--serif);
  font-size: 1.3rem;
  font-weight: 400;
  font-style: italic;
  line-height: 1.5;
  color: var(--text);
  margin-bottom: 1.8rem;
  position: relative;
}

.endorsement-quote::before {
  content: '"';
  position: absolute;
  top: -0.3rem;
  left: -0.1rem;
  font-size: 3rem;
  color: var(--accent2);
  opacity: 0.35;
  font-style: normal;
  line-height: 1;
}

.endorsement-author {
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--text);
}

.endorsement-role {
  font-size: 0.78rem;
  color: var(--text-dim);
  font-style: italic;
  font-weight: 300;
  margin-top: 0.2rem;
}

/* ─── RESOURCES ─── */
.resources-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.resource-card {
  padding: 2.5rem 2rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  transition: all 0.4s;
  position: relative;
  overflow: hidden;
}

.resource-card:hover {
  border-color: rgba(12,166,207,0.12);
  transform: translateY(-4px);
}

.resource-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent2), transparent);
  opacity: 0;
  transition: opacity 0.4s;
}

.resource-card:hover::before { opacity: 1; }

.resource-icon {
  margin-bottom: 1.5rem;
  display: block;
  opacity: 0.6;
}

.resource-title {
  font-family: var(--serif);
  font-size: 1.25rem;
  font-weight: 500;
  margin-bottom: 1rem;
}

.resource-items { list-style: none; }

.resource-items li {
  font-size: 0.92rem;
  color: var(--text-dim);
  font-weight: 300;
  padding: 0.45rem 0;
  display: flex;
  align-items: flex-start;
  gap: 0.7rem;
  line-height: 1.55;
}

.resource-items li::before {
  content: '';
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--accent2);
  flex-shrink: 0;
  margin-top: 0.5rem;
  opacity: 0.5;
}

/* ─── CHAPTER PREVIEW ─── */
.preview {
  background: var(--bg-elevated);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.preview-header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.preview-container {
  max-width: 780px;
  margin: 0 auto;
}

.preview-box {
  background: rgba(11, 12, 15, 0.7);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
}

.preview-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.8rem;
  border-bottom: 1px solid var(--border);
  background: rgba(255,255,255,0.01);
}

.preview-bar-dots {
  display: flex;
  gap: 6px;
}

.preview-bar-dot {
  width: 9px; height: 9px;
  border-radius: 50%;
}

.preview-bar-dot:nth-child(1) { background: #ff5f57; }
.preview-bar-dot:nth-child(2) { background: #febc2e; }
.preview-bar-dot:nth-child(3) { background: #28c840; }

.preview-bar-title {
  font-family: var(--mono);
  font-size: 0.68rem;
  color: var(--text-faint);
  letter-spacing: 1px;
}

.preview-body {
  padding: 3rem;
  max-height: 520px;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: rgba(12,166,207,0.2) transparent;
}

.preview-body::-webkit-scrollbar { width: 3px; }
.preview-body::-webkit-scrollbar-thumb { background: rgba(12,166,207,0.2); border-radius: 3px; }

.preview-body h3 {
  font-family: var(--serif);
  font-size: 1.5rem;
  font-weight: 500;
  color: var(--text);
  margin: 2rem 0 1rem;
}

.preview-body h3:first-child { margin-top: 0; }

.preview-body p {
  font-size: 1rem;
  color: var(--text-dim);
  line-height: 1.9;
  font-weight: 300;
  margin-bottom: 0.8rem;
}

.preview-body .hl { color: var(--accent2); font-weight: 400; }

.preview-body blockquote {
  margin: 1.5rem 0;
  padding: 1.2rem 1.8rem;
  background: var(--accent2-dim);
  border-left: 2px solid var(--accent2);
  border-radius: 0 6px 6px 0;
  font-style: italic;
  font-size: 0.98rem;
  color: var(--text-dim);
  line-height: 1.8;
}

.preview-end {
  text-align: center;
  padding: 1.5rem;
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--text-faint);
  letter-spacing: 2px;
  text-transform: uppercase;
}

/* ─── KEY RECS ─── */
.recs-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.2rem;
}

.rec-card {
  display: flex;
  gap: 1.2rem;
  padding: 1.8rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  transition: border-color 0.3s;
  align-items: flex-start;
}

.rec-card:hover { border-color: rgba(12,166,207,0.12); }

.rec-number {
  font-family: var(--serif);
  font-size: 2rem;
  font-weight: 400;
  color: var(--accent2);
  opacity: 0.25;
  line-height: 1;
  min-width: 32px;
}

.rec-card h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.3rem;
}

.rec-card p {
  font-size: 0.82rem;
  color: var(--text-dim);
  font-weight: 300;
  line-height: 1.6;
}

/* ─── SIGNUP ─── */
.signup {
  text-align: center;
  padding: 7rem 3.5rem;
  position: relative;
  z-index: 1;
  background: rgba(11, 12, 15, 0.5);
}

.signup .section-heading { margin-bottom: 0.8rem; }

.signup-desc {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--text-dim);
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-bottom: 2.5rem;
}

.signup-form {
  display: flex;
  gap: 0.8rem;
  justify-content: center;
  max-width: 460px;
  margin: 0 auto;
}

.signup-input {
  flex: 1;
  padding: 0.9rem 1.2rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text);
  font-family: var(--sans);
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.3s;
}

.signup-input::placeholder { color: var(--text-faint); }
.signup-input:focus { border-color: rgba(12,166,207,0.3); }

.signup-btn {
  padding: 0.9rem 2rem;
  background: var(--accent);
  color: var(--bg);
  border: none;
  border-radius: 4px;
  font-family: var(--sans);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  cursor: pointer;
  transition: all 0.3s;
}

.signup-btn:hover { background: var(--accent-light); }

/* ─── FOOTER ─── */
.footer {
  padding: 3.5rem 3.5rem 2.5rem;
  border-top: 1px solid var(--border);
  position: relative;
  z-index: 1;
  background: rgba(11, 12, 15, 0.6);
}

.footer-brand {
  font-family: var(--serif);
  font-size: 1.02rem;
  font-weight: 600;
  color: var(--text-dim);
}

.footer-brand span { color: var(--accent2); }

.footer-links a {
  font-size: 0.75rem;
  color: var(--text-faint);
  text-decoration: none;
  transition: color 0.3s;
}

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

.footer-copy {
  text-align: center;
  padding-top: 2rem;
  margin-top: 2rem;
  border-top: 1px solid var(--border);
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
}

.footer-copy p {
  font-size: 0.68rem;
  color: var(--text-faint);
  font-family: var(--mono);
}

/* ─── SCROLL REVEAL ─── */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.9s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ─── RESPONSIVE ─── */
@media (max-width: 960px) {
  .nav { padding: 0 1.5rem; }
  .section { padding: 4.5rem 1.5rem; }
  .hero-content {
    grid-template-columns: 1fr;
    padding: 7rem 1.5rem 3rem;
    gap: 3rem;
    text-align: center;
  }
  .hero-text { max-width: 100%; }
  .hero-cta-group { justify-content: center; }
  .book-cover { width: 280px; height: 320px; padding: 1.5rem; }
  .book-shield { width: 40px; height: 40px; font-size: 1rem; margin-bottom: 1.2rem; }
  .book-title-text { font-size: 1rem; }
  .overview-grid { grid-template-columns: 1fr; gap: 3rem; }
  .about-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .about-photo { max-width: 280px; }
  .resources-grid { grid-template-columns: 1fr; }
  .recs-grid { grid-template-columns: 1fr; }
  .endorsement-card { min-width: 300px; }
  .footer-inner { flex-direction: column; gap: 1.5rem; text-align: center; }
  .footer-links { flex-wrap: wrap; justify-content: center; }
  .signup-form { flex-direction: column; }
}

@media (max-width: 480px) {
  .hero-title { font-size: 2.4rem; }
  .book-cover { width: 180px; height: 260px; }
}