/* ============================================================
   BRUNO TRUANT — CINEMATIC STORYTELLER
   styles.css
   ============================================================ */

/* ============================================================
   0. FONTS (self-hosted Jost)
   ============================================================ */
@font-face {
  font-family: 'Jost';
  src: url('../fonts/Jost-Light.woff2') format('woff2'),
       url('../fonts/Jost-Light.ttf') format('truetype');
  font-weight: 300;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Jost';
  src: url('../fonts/Jost-Regular.woff2') format('woff2'),
       url('../fonts/Jost-Regular.ttf') format('truetype');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Jost';
  src: url('../fonts/Jost-Medium.woff2') format('woff2'),
       url('../fonts/Jost-Medium.ttf') format('truetype');
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Jost';
  src: url('../fonts/Jost-Bold.woff2') format('woff2'),
       url('../fonts/Jost-Bold.ttf') format('truetype');
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

/* ============================================================
   1. CUSTOM PROPERTIES
   ============================================================ */
:root {
  /* Colours */
  --clr-base:       #0B1120;
  --clr-surface:    #131B2E;
  --clr-surface-2:  #1E293B;
  --clr-border:     #263348;
  --clr-text:       #CBD5E1;
  --clr-text-muted: #64748B;
  --clr-text-light: #F1F5F9;
  --clr-amber:      #F59E0B;
  --clr-amber-dark: #D97706;
  --clr-amber-dim:  rgba(245, 158, 11, 0.12);
  --clr-cyan:       #06B6D4;
  --clr-cyan-dim:   rgba(6, 182, 212, 0.12);

  /* Typography */
  --font-base: 'Jost', system-ui, -apple-system, sans-serif;
  --fs-xs:   0.75rem;
  --fs-sm:   0.875rem;
  --fs-base: 1rem;
  --fs-lg:   1.125rem;
  --fs-xl:   1.25rem;
  --fs-2xl:  1.5rem;
  --fs-3xl:  1.875rem;
  --fs-4xl:  2.25rem;
  --fs-5xl:  3rem;
  --fs-6xl:  3.75rem;
  --fs-7xl:  4.5rem;

  /* Spacing */
  --space-xs:  0.5rem;
  --space-sm:  0.75rem;
  --space-md:  1rem;
  --space-lg:  1.5rem;
  --space-xl:  2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
  --space-5xl: 8rem;

  /* Layout */
  --max-width: 1200px;
  --section-padding: clamp(4rem, 8vw, 8rem);

  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.75rem;
  --radius-lg: 1.25rem;
  --radius-xl: 2rem;

  /* Transitions */
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in-out: cubic-bezier(0.37, 0, 0.63, 1);
  --duration-fast: 200ms;
  --duration-base: 350ms;
  --duration-slow: 600ms;
}

/* ============================================================
   2. RESET & BASE
   ============================================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: auto; /* Lenis handles smooth scroll */
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-base);
  font-weight: 400;
  font-size: var(--fs-base);
  line-height: 1.7;
  color: var(--clr-text);
  background-color: var(--clr-base);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, video {
  max-width: 100%;
  height: auto;
  display: block;
}

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

ul, ol {
  list-style: none;
}

button {
  cursor: pointer;
  font-family: inherit;
  border: none;
  background: none;
}

input, textarea, select {
  font-family: inherit;
}

/* Accessibility: skip link */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* ============================================================
   3. SCROLL PROGRESS BAR
   ============================================================ */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  background: linear-gradient(90deg, var(--clr-amber), var(--clr-cyan));
  z-index: 1000;
  transition: width 100ms linear;
}

/* ============================================================
   4. TYPOGRAPHY UTILITIES
   ============================================================ */
.section-tag {
  display: inline-block;
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--clr-amber);
  margin-bottom: var(--space-md);
}

.section-heading {
  font-size: clamp(var(--fs-2xl), 4vw, var(--fs-4xl));
  font-weight: 700;
  line-height: 1.2;
  color: var(--clr-text-light);
  margin-bottom: var(--space-lg);
}

.section-subtitle {
  font-size: var(--fs-lg);
  color: var(--clr-text-muted);
  max-width: 64ch;
  margin-bottom: var(--space-xl);
}

.section-header {
  margin-bottom: var(--space-3xl);
}

.section-footer {
  text-align: center;
  margin-top: var(--space-3xl);
}

/* ============================================================
   5. LAYOUT UTILITIES
   ============================================================ */
.section-inner {
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: clamp(1rem, 4vw, 2.5rem);
}

/* ============================================================
   6. BUTTON SYSTEM
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  padding: 0.75rem 1.75rem;
  font-size: var(--fs-sm);
  font-weight: 600;
  letter-spacing: 0.02em;
  border-radius: var(--radius-sm);
  transition: background var(--duration-fast) var(--ease-out),
              color var(--duration-fast) var(--ease-out),
              transform var(--duration-fast) var(--ease-out),
              box-shadow var(--duration-fast) var(--ease-out),
              border-color var(--duration-fast) var(--ease-out);
  white-space: nowrap;
  text-decoration: none;
  border: 2px solid transparent;
}

.btn:focus-visible {
  outline: 2px solid var(--clr-amber);
  outline-offset: 3px;
}

.btn:active {
  transform: scale(0.97);
}

/* Amber (primary CTA) */
.btn-amber {
  background: var(--clr-amber);
  color: #0B1120;
  border-color: var(--clr-amber);
}

.btn-amber:hover {
  background: var(--clr-amber-dark);
  border-color: var(--clr-amber-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(245, 158, 11, 0.30);
}

/* Outline */
.btn-outline {
  background: transparent;
  color: var(--clr-text-light);
  border-color: var(--clr-border);
}

.btn-outline:hover {
  border-color: var(--clr-amber);
  color: var(--clr-amber);
  transform: translateY(-2px);
}

/* Ghost */
.btn-ghost {
  background: transparent;
  color: var(--clr-text-muted);
  border-color: var(--clr-border);
}

.btn-ghost:hover {
  background: var(--clr-surface-2);
  color: var(--clr-text-light);
}

/* Sizes */
.btn-sm {
  padding: 0.5rem 1.125rem;
  font-size: var(--fs-xs);
}

.btn-lg {
  padding: 1rem 2.25rem;
  font-size: var(--fs-base);
}

.btn-full {
  width: 100%;
}

/* Loading state */
.btn-loading {
  display: none;
}

.btn.loading .btn-text {
  display: none;
}

.btn.loading .btn-loading {
  display: flex;
}

.spin {
  animation: spin 0.8s linear infinite;
}

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

/* ============================================================
   7. NAVIGATION
   ============================================================ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 0;
  transition: background var(--duration-base) var(--ease-out),
              box-shadow var(--duration-base) var(--ease-out);
}

.site-header.scrolled {
  background: rgba(11, 17, 32, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--clr-border);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-width);
  margin-inline: auto;
  padding: 1.125rem clamp(1rem, 4vw, 2.5rem);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  text-decoration: none;
  flex-shrink: 0;
}

.nav-logo-initials {
  width: 36px;
  height: 36px;
  background: var(--clr-amber);
  color: var(--clr-base);
  font-weight: 700;
  font-size: var(--fs-sm);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  letter-spacing: 0.03em;
}

.nav-logo-name {
  font-weight: 600;
  font-size: var(--fs-sm);
  color: var(--clr-text-light);
  letter-spacing: 0.01em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
  list-style: none;
}

.nav-links a {
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--clr-text-muted);
  transition: color var(--duration-fast);
  letter-spacing: 0.01em;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--clr-text-light);
}

.nav-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-md);
}

/* Hamburger — hidden on desktop */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}

.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--clr-text-light);
  border-radius: 2px;
  transition: transform var(--duration-base) var(--ease-out),
              opacity var(--duration-base) var(--ease-out);
}

.hamburger[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.hamburger[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.hamburger[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile menu — hidden by default everywhere */
.mobile-menu {
  display: none;
}

.mobile-menu-overlay {
  display: none;
}

/* ============================================================
   8. HERO
   ============================================================ */
.hero {
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-top: 6rem;
  padding-bottom: var(--space-3xl);
  position: relative;
  overflow: hidden;
}

/* Subtle radial background glow — warm, NOT neon */
.hero::before {
  content: '';
  position: absolute;
  top: -20%;
  right: -10%;
  width: 60vw;
  height: 60vw;
  background: radial-gradient(ellipse, rgba(245, 158, 11, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

.hero-inner {
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: clamp(1rem, 4vw, 2.5rem);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 5vw, 5rem);
  align-items: center;
}

/* Photo column */
.hero-photo-col {
  display: flex;
  justify-content: center;
}

.hero-photo-wrap {
  position: relative;
  width: clamp(260px, 40vw, 480px);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.hero-photo-wrap img {
  width: 100%;
  height: auto;
  display: block;
  /* PURPOSE: Subtle warm tint to reinforce brand palette */
  filter: brightness(0.95) contrast(1.02);
}

/* Amber accent bar behind the photo */
.hero-photo-accent {
  position: absolute;
  bottom: -1rem;
  left: -1rem;
  width: 60%;
  height: 40%;
  background: linear-gradient(135deg, var(--clr-amber-dim), transparent);
  border-radius: var(--radius-md);
  z-index: -1;
}

/* Content column */
.hero-content-col {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-lg);
}

.hero-eyebrow {
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--clr-cyan);
}

/* Word-by-word headline reveal */
.hero-headline {
  font-size: clamp(var(--fs-3xl), 5vw, var(--fs-6xl));
  font-weight: 700;
  line-height: 1.1;
  color: var(--clr-text-light);
  display: flex;
  flex-wrap: wrap;
  gap: 0 0.3em;
}

/* PURPOSE: Clip each word to enable per-word upward reveal */
.word-wrap {
  display: inline-block;
  overflow: hidden;
  vertical-align: bottom;
  padding-bottom: 0.08em; /* prevent clip of descenders */
}

.word {
  display: inline-block;
  transform: translateY(110%);
  opacity: 0;
}

.hero-lead {
  font-size: var(--fs-lg);
  color: var(--clr-text-muted);
  max-width: 52ch;
  line-height: 1.7;
}

/* Stats bar */
.hero-stats {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  padding: var(--space-lg) var(--space-xl);
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  width: 100%;
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  min-width: 0;
}

.stat-number {
  font-size: var(--fs-2xl);
  font-weight: 700;
  color: var(--clr-amber);
  line-height: 1;
}

.stat-label {
  font-size: var(--fs-xs);
  color: var(--clr-text-muted);
  letter-spacing: 0.02em;
  margin-top: 0.25em;
  white-space: nowrap;
}

.stat-label-only {
  font-size: var(--fs-xl);
  font-weight: 700;
  color: var(--clr-amber);
  margin-top: 0;
}

.stat-divider {
  width: 1px;
  height: 2.5rem;
  background: var(--clr-border);
  flex-shrink: 0;
}

.hero-ctas {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

/* Scroll indicator */
.scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  font-size: var(--fs-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--clr-text-muted);
  /* PURPOSE: Draw attention downward after hero content is absorbed */
  animation: scrollBounce 2s ease-in-out infinite;
}

.scroll-indicator-line {
  width: 1px;
  height: 3rem;
  background: linear-gradient(to bottom, var(--clr-amber), transparent);
}

@keyframes scrollBounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50%       { transform: translateX(-50%) translateY(8px); }
}

/* ============================================================
   9. SCROLL-REVEAL ANIMATION CLASSES
   ============================================================ */
/* PURPOSE: Staged reveal animations that guide eye through content */
.reveal-fade {
  opacity: 0;
  transition: opacity var(--duration-slow) var(--ease-out);
}

.reveal-fade.in-view {
  opacity: 1;
}

.reveal-up {
  opacity: 0;
  transform: translateY(36px);
  transition: opacity var(--duration-slow) var(--ease-out),
              transform var(--duration-slow) var(--ease-out);
  transition-delay: var(--delay, 0s);
}

.reveal-up.in-view {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================================
   10. CHI SONO — TIMELINE
   ============================================================ */
.chi-sono {
  padding-block: var(--section-padding);
  background: var(--clr-surface);
}

.chi-sono-body {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 5vw, 5rem);
  align-items: start;
}

.chi-sono-text {
  padding-top: var(--space-lg);
}

.chi-sono-text p {
  margin-bottom: var(--space-lg);
  color: var(--clr-text);
  line-height: 1.8;
}

.chi-sono-text p:last-child {
  margin-bottom: 0;
}

/* Timeline */
.timeline {
  position: relative;
  padding-left: 2rem;
}

.timeline-line {
  position: absolute;
  left: 0.625rem;
  top: 1rem;
  bottom: 0;
  width: 2px;
  background: var(--clr-border);
  border-radius: 2px;
  overflow: hidden;
}

/* PURPOSE: Line drawing reveals history sequentially as user scrolls */
.timeline-line-fill {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 0%;
  background: linear-gradient(to bottom, var(--clr-amber), var(--clr-cyan));
  border-radius: 2px;
  transition: height 0.1s linear;
}

.timeline-item {
  position: relative;
  padding-bottom: var(--space-2xl);
  opacity: 0;
  transform: translateX(-16px);
  transition: opacity var(--duration-slow) var(--ease-out),
              transform var(--duration-slow) var(--ease-out);
}

.timeline-item.in-view {
  opacity: 1;
  transform: translateX(0);
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-dot {
  position: absolute;
  left: -2rem;
  top: 0.35rem;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--clr-amber);
  border: 2px solid var(--clr-base);
  box-shadow: 0 0 0 3px var(--clr-surface);
}

.timeline-year {
  display: block;
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--clr-amber);
  text-transform: uppercase;
  margin-bottom: 0.25rem;
}

.timeline-title {
  font-size: var(--fs-lg);
  font-weight: 700;
  color: var(--clr-text-light);
  margin-bottom: 0.375rem;
}

.timeline-desc {
  font-size: var(--fs-sm);
  color: var(--clr-text-muted);
  line-height: 1.7;
}

/* ============================================================
   11. COSA FACCIO — SERVICES CAROUSEL
   ============================================================ */
.cosa-faccio {
  padding-block: var(--section-padding);
  background: var(--clr-base);
}

.services-carousel {
  position: relative;
  overflow: hidden;
}

.services-track {
  display: flex;
  gap: var(--space-xl);
  transition: transform var(--duration-slow) var(--ease-out);
  will-change: transform;
}

.service-card {
  flex: 0 0 calc(33.333% - var(--space-xl) * 2 / 3);
  min-width: 0;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  padding: clamp(1.5rem, 3vw, 2.5rem);
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  transition: border-color var(--duration-base) var(--ease-out),
              transform var(--duration-base) var(--ease-out);
}

.service-card:hover {
  border-color: var(--clr-amber);
  transform: translateY(-4px);
}

.service-card-icon {
  width: 56px;
  height: 56px;
  background: var(--clr-amber-dim);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--clr-amber);
  flex-shrink: 0;
}

.service-card-title {
  font-size: var(--fs-xl);
  font-weight: 700;
  color: var(--clr-text-light);
  line-height: 1.3;
}

.service-card-intro {
  font-size: var(--fs-sm);
  color: var(--clr-text-muted);
}

.service-card-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  flex: 1;
}

.service-card-list li {
  font-size: var(--fs-sm);
  color: var(--clr-text);
  padding-left: 1.25rem;
  position: relative;
}

.service-card-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--clr-amber);
}

.service-card-cta {
  align-self: flex-start;
  margin-top: auto;
}

/* Carousel controls */
.carousel-dots {
  display: flex;
  justify-content: center;
  gap: var(--space-sm);
  margin-top: var(--space-xl);
}

.carousel-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--clr-border);
  border: none;
  cursor: pointer;
  transition: background var(--duration-fast), transform var(--duration-fast);
  padding: 0;
}

.carousel-dot.active {
  background: var(--clr-amber);
  transform: scale(1.35);
}

.carousel-arrows {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 100%;
  display: flex;
  justify-content: space-between;
  pointer-events: none;
  padding-inline: var(--space-sm);
  left: 0;
  right: 0;
}

.carousel-arrow {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--clr-surface-2);
  border: 1px solid var(--clr-border);
  color: var(--clr-text-light);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  pointer-events: auto;
  transition: background var(--duration-fast),
              border-color var(--duration-fast),
              transform var(--duration-fast);
}

.carousel-arrow:hover {
  background: var(--clr-amber);
  border-color: var(--clr-amber);
  color: var(--clr-base);
  transform: scale(1.08);
}

.carousel-arrow:focus-visible {
  outline: 2px solid var(--clr-amber);
  outline-offset: 3px;
}

/* ============================================================
   12. LIBRI — BOOKS
   ============================================================ */
.libri {
  padding-block: var(--section-padding);
  background: var(--clr-surface);
}

.books-category {
  margin-bottom: var(--space-3xl);
}

.books-category:last-child {
  margin-bottom: 0;
}

.books-category-label {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--clr-text-muted);
  margin-bottom: var(--space-xl);
}

.books-category-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
}

.books-category-dot--amber { background: var(--clr-amber); }
.books-category-dot--cyan  { background: var(--clr-cyan); }

/* Grid layouts */
.books-grid {
  display: grid;
  gap: var(--space-xl);
}

.books-grid--single {
  grid-template-columns: 1fr;
  max-width: 640px;
}

/* Single-book cards use horizontal layout */
.books-grid--single .book-card {
  flex-direction: row;
}
.books-grid--single .book-card-link {
  flex-shrink: 0;
  width: 200px;
}
.books-grid--single .book-cover-wrap {
  height: 100%;
  aspect-ratio: auto;
}
.books-grid--single .book-info {
  padding: var(--space-lg);
}

.books-grid--three {
  grid-template-columns: repeat(3, 1fr);
}

.books-grid--two {
  grid-template-columns: repeat(2, 1fr);
  max-width: 960px;
}

/* Book card */
.book-card {
  background: var(--clr-surface-2);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: border-color var(--duration-base) var(--ease-out);
}

.book-card:hover {
  border-color: var(--clr-amber);
}

.book-card-link {
  display: block;
  text-decoration: none;
}

.book-cover-wrap {
  position: relative;
  aspect-ratio: 2/3;
  overflow: hidden;
  background: var(--clr-base);
}

.book-cover-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--duration-slow) var(--ease-out);
}

.book-card:hover .book-cover-wrap img {
  transform: scale(1.04);
}

.book-badge {
  position: absolute;
  top: 0.75rem;
  left: 0.75rem;
  background: var(--clr-amber);
  color: var(--clr-base);
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.25rem 0.625rem;
  border-radius: var(--radius-sm);
}

.book-info {
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  flex: 1;
}

.book-category-label {
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--clr-cyan);
}

.book-title {
  font-size: var(--fs-lg);
  font-weight: 700;
  color: var(--clr-text-light);
  line-height: 1.3;
}

.book-subtitle {
  font-size: var(--fs-sm);
  color: var(--clr-text-muted);
  font-style: italic;
}

.book-meta {
  font-size: var(--fs-xs);
  color: var(--clr-text-muted);
}

/* PURPOSE: Prominent Amazon CTA — this is the revenue action */
.book-cta {
  margin-top: auto;
  width: 100%;
  justify-content: center;
  font-size: var(--fs-sm);
  font-weight: 700;
  letter-spacing: 0.02em;
}

/* 3D Tilt effect — CSS perspective */
.tilt-card {
  transform-style: preserve-3d;
  transform: perspective(800px) rotateX(0deg) rotateY(0deg);
  transition: transform var(--duration-base) var(--ease-out),
              border-color var(--duration-base) var(--ease-out),
              box-shadow var(--duration-base) var(--ease-out);
}

/* JS adds transform values via style.transform directly */

/* ============================================================
   13. BLOG
   ============================================================ */
.blog {
  padding-block: var(--section-padding);
  background: var(--clr-base);
}

.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.blog-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--duration-base) var(--ease-out),
              transform var(--duration-base) var(--ease-out);
}

.blog-card:hover {
  border-color: var(--clr-amber);
  transform: translateY(-4px);
}

.blog-card-inner {
  display: block;
  padding: var(--space-xl);
  height: 100%;
  text-decoration: none;
}

.blog-card-meta {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
}

.blog-tag {
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--clr-amber);
  background: var(--clr-amber-dim);
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-sm);
}

.blog-card-meta time {
  font-size: var(--fs-xs);
  color: var(--clr-text-muted);
}

.blog-card-title {
  font-size: var(--fs-xl);
  font-weight: 700;
  color: var(--clr-text-light);
  line-height: 1.3;
  margin-bottom: var(--space-md);
  transition: color var(--duration-fast);
}

.blog-card:hover .blog-card-title {
  color: var(--clr-amber);
}

.blog-card-excerpt {
  font-size: var(--fs-sm);
  color: var(--clr-text-muted);
  line-height: 1.7;
  margin-bottom: var(--space-lg);
}

.blog-card-arrow {
  display: flex;
  align-items: center;
  color: var(--clr-amber);
  transition: transform var(--duration-fast);
}

.blog-card:hover .blog-card-arrow {
  transform: translateX(6px);
}

/* ============================================================
   14. ISIPC LAB
   ============================================================ */
.isipc {
  padding-block: var(--section-padding);
  background: var(--clr-surface);
}

.isipc-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 5vw, 5rem);
  align-items: center;
}

.isipc-text .section-tag {
  display: block;
}

.isipc-desc {
  color: var(--clr-text-muted);
  margin-bottom: var(--space-xl);
  line-height: 1.8;
}

.isipc-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}

.isipc-features li {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--fs-sm);
  color: var(--clr-text);
}

.isipc-features li svg {
  color: var(--clr-amber);
  flex-shrink: 0;
}

/* Terminal */
/* PURPOSE: Establishes technical credibility with cinematic effect */
.isipc-terminal {
  background: #0D1117;
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  font-family: 'Courier New', 'Menlo', monospace;
}

.terminal-header {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 0.875rem 1rem;
  background: var(--clr-surface-2);
  border-bottom: 1px solid var(--clr-border);
}

.terminal-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  flex-shrink: 0;
}

.terminal-dot--red    { background: #FF5F57; }
.terminal-dot--yellow { background: #FEBC2E; }
.terminal-dot--green  { background: #28C840; }

.terminal-title {
  margin-left: auto;
  margin-right: auto;
  font-size: var(--fs-xs);
  color: var(--clr-text-muted);
  font-family: 'Courier New', monospace;
}

.terminal-body {
  padding: var(--space-lg) var(--space-xl);
  min-height: 260px;
}

.terminal-line {
  font-size: var(--fs-sm);
  color: #7EE787;
  margin-bottom: var(--space-sm);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.terminal-prompt {
  color: var(--clr-amber);
  flex-shrink: 0;
}

.terminal-text {
  color: #7EE787;
}

/* PURPOSE: Blinking cursor adds life to the typing effect */
.terminal-cursor {
  color: var(--clr-amber);
  animation: blink 1s step-end infinite;
}

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

.terminal-output {
  margin-top: var(--space-md);
}

.terminal-output p {
  font-size: var(--fs-xs);
  color: #58A6FF;
  margin-bottom: 0.375rem;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.terminal-output p.visible {
  opacity: 1;
}

.terminal-output .out-ok {
  color: #7EE787;
}

.terminal-output .out-warn {
  color: var(--clr-amber);
}

/* ============================================================
   15. NEWSLETTER
   ============================================================ */
.newsletter {
  padding-block: var(--section-padding);
  background: var(--clr-base);
}

.newsletter-inner {
  max-width: 800px;
  margin-inline: auto;
  text-align: center;
}

.newsletter-inner .section-heading {
  margin-bottom: var(--space-xl);
}

.newsletter-perks {
  display: flex;
  justify-content: center;
  gap: var(--space-xl);
  flex-wrap: wrap;
  margin-bottom: var(--space-2xl);
}

.newsletter-perk {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  text-align: left;
  max-width: 200px;
}

.newsletter-perk svg {
  color: var(--clr-amber);
  flex-shrink: 0;
  margin-top: 0.1em;
}

.newsletter-perk strong {
  display: block;
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--clr-text-light);
}

.newsletter-perk span {
  display: block;
  font-size: var(--fs-xs);
  color: var(--clr-text-muted);
}

/* Form */
.newsletter-form {
  box-sizing: border-box;
}

.newsletter-fields {
  display: flex;
  gap: var(--space-md);
  align-items: flex-end;
  margin-bottom: var(--space-md);
  flex-wrap: wrap;
}

.newsletter-fields .form-group {
  flex: 1;
  min-width: 160px;
}

.newsletter-fields input {
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-sm);
  color: var(--clr-text-light);
  font-size: var(--fs-sm);
  transition: border-color var(--duration-fast);
  box-sizing: border-box;
}

.newsletter-fields input:focus {
  outline: none;
  border-color: var(--clr-amber);
}

.newsletter-privacy {
  font-size: var(--fs-xs);
  color: var(--clr-text-muted);
}

/* ============================================================
   16. TESTIMONIALS
   ============================================================ */
.testimonials {
  padding-block: var(--section-padding);
  background: var(--clr-surface);
}

.testimonials .section-inner {
  margin-bottom: var(--space-2xl);
}

.testimonials-track-outer {
  position: relative;
  overflow: hidden;
  padding-bottom: var(--space-xl);
}

.testimonials-track {
  display: flex;
  gap: var(--space-xl);
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  -ms-overflow-style: none;
  padding-inline: clamp(1rem, 4vw, 2.5rem);
  padding-bottom: var(--space-sm);
  transition: scroll-left var(--duration-slow) var(--ease-out);
}

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

.testimonial-card {
  flex: 0 0 clamp(280px, 40vw, 480px);
  scroll-snap-align: start;
  background: var(--clr-surface-2);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  position: relative;
}

/* Quote mark accent */
.testimonial-card::before {
  content: '\201C';
  position: absolute;
  top: 1rem;
  right: 1.5rem;
  font-size: 5rem;
  line-height: 1;
  color: var(--clr-amber);
  opacity: 0.15;
  font-family: Georgia, serif;
  pointer-events: none;
  user-select: none;
}

.testimonial-text {
  font-size: var(--fs-base);
  color: var(--clr-text);
  line-height: 1.8;
  flex: 1;
}

.testimonial-footer {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.testimonial-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--clr-amber-dim);
  border: 2px solid var(--clr-amber);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--fs-lg);
  font-weight: 700;
  color: var(--clr-amber);
  flex-shrink: 0;
}

.testimonial-name {
  font-weight: 700;
  color: var(--clr-text-light);
  display: block;
  font-style: normal;
}

.testimonial-role {
  font-size: var(--fs-xs);
  color: var(--clr-text-muted);
}

.testimonials-nav {
  display: flex;
  justify-content: center;
  gap: var(--space-md);
  margin-top: var(--space-xl);
}

/* ============================================================
   17. CONTACT
   ============================================================ */
.contatti {
  padding-block: var(--section-padding);
  background: var(--clr-base);
}

.contatti-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 5vw, 5rem);
  align-items: start;
}

.contatti-info .section-tag {
  display: block;
}

.contatti-desc {
  color: var(--clr-text-muted);
  margin-bottom: var(--space-xl);
  line-height: 1.8;
}

.contatti-details {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}

.contatti-details li {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--fs-sm);
  color: var(--clr-text);
}

.contatti-details li svg {
  color: var(--clr-amber);
  flex-shrink: 0;
}

.contatti-details li a {
  color: var(--clr-amber);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.contatti-details li a:hover {
  color: var(--clr-amber-dark);
}

.contatti-social {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.contatti-social a {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--clr-text-muted);
  transition: background var(--duration-fast),
              border-color var(--duration-fast),
              color var(--duration-fast),
              transform var(--duration-fast);
}

.contatti-social a:hover {
  background: var(--clr-amber-dim);
  border-color: var(--clr-amber);
  color: var(--clr-amber);
  transform: translateY(-3px);
}

/* Form */
.contatti-form-wrap {
  box-sizing: border-box;
}

.contatti-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  box-sizing: border-box;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
  box-sizing: border-box;
}

.form-group label {
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--clr-text-muted);
}

.form-group label span {
  color: var(--clr-amber);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-sm);
  color: var(--clr-text-light);
  font-size: var(--fs-sm);
  transition: border-color var(--duration-fast);
  box-sizing: border-box;
  appearance: none;
  -webkit-appearance: none;
}

.form-group select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%2364748B' d='M6 8L0 0h12z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.5rem;
  cursor: pointer;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--clr-text-muted);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--clr-amber);
}

.form-group textarea {
  resize: vertical;
  min-height: 140px;
}

/* Form messages — HIDDEN BY DEFAULT (Rule 11) */
.form-msg {
  display: none;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-sm);
  font-size: var(--fs-sm);
  font-weight: 500;
  border: 1px solid transparent;
}

/* Shown via .visible class from JS */
.form-msg.visible {
  display: flex;
}

.form-msg--success {
  background: rgba(34, 197, 94, 0.1);
  border-color: rgba(34, 197, 94, 0.3);
  color: #4ADE80;
}

.form-msg--error {
  background: rgba(239, 68, 68, 0.1);
  border-color: rgba(239, 68, 68, 0.3);
  color: #F87171;
}

.form-msg--error a {
  color: var(--clr-amber);
  text-decoration: underline;
}

/* ============================================================
   18. FOOTER
   ============================================================ */
.site-footer {
  background: var(--clr-surface);
  border-top: 1px solid var(--clr-border);
  padding-top: var(--space-4xl);
  padding-bottom: var(--space-xl);
}

.footer-inner {
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: clamp(1rem, 4vw, 2.5rem);
}

.footer-top {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: clamp(2rem, 5vw, 5rem);
  padding-bottom: var(--space-3xl);
  border-bottom: 1px solid var(--clr-border);
  margin-bottom: var(--space-xl);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 0.625rem;
}

.footer-logo-initials {
  width: 40px;
  height: 40px;
  background: var(--clr-amber);
  color: var(--clr-base);
  font-weight: 700;
  font-size: var(--fs-base);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}

.footer-logo-name {
  font-weight: 700;
  font-size: var(--fs-lg);
  color: var(--clr-text-light);
}

.footer-tagline {
  font-size: var(--fs-sm);
  color: var(--clr-text-muted);
  line-height: 1.6;
  max-width: 28ch;
}

.footer-social {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.footer-social a {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--clr-surface-2);
  border: 1px solid var(--clr-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--clr-text-muted);
  transition: background var(--duration-fast),
              border-color var(--duration-fast),
              color var(--duration-fast);
}

.footer-social a:hover {
  background: var(--clr-amber-dim);
  border-color: var(--clr-amber);
  color: var(--clr-amber);
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.footer-nav-col h3 {
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--clr-text-muted);
  margin-bottom: var(--space-lg);
}

.footer-nav-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer-nav-col a {
  font-size: var(--fs-sm);
  color: var(--clr-text-muted);
  transition: color var(--duration-fast);
}

.footer-nav-col a:hover {
  color: var(--clr-amber);
}

.footer-bottom {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.footer-bottom p {
  font-size: var(--fs-xs);
  color: var(--clr-text-muted);
}

.footer-affiliate-note {
  font-size: var(--fs-xs) !important;
  color: var(--clr-text-muted);
  opacity: 0.7;
}

/* ============================================================
   19. COOKIE BANNER
   ============================================================ */
.cookie-banner {
  display: none;
  position: fixed;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  width: calc(100% - 2rem);
  max-width: 720px;
  background: var(--clr-surface-2);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  z-index: 200;
  box-shadow: 0 16px 48px rgba(0,0,0,0.5);
}

/* Shown via .visible class from JS */
.cookie-banner.visible {
  display: block;
}

.cookie-banner-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
  padding: var(--space-lg) var(--space-xl);
  flex-wrap: wrap;
}

.cookie-banner-text {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  flex: 1;
  min-width: 200px;
}

.cookie-banner-text svg {
  color: var(--clr-amber);
  flex-shrink: 0;
  margin-top: 0.1em;
}

.cookie-banner-text p {
  font-size: var(--fs-sm);
  color: var(--clr-text);
}

.cookie-banner-text a {
  color: var(--clr-amber);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.cookie-banner-actions {
  display: flex;
  gap: var(--space-sm);
  flex-shrink: 0;
}

/* ============================================================
   20. RESPONSIVE — TABLET (max 1024px)
   ============================================================ */
@media (max-width: 1024px) {
  /* Hero */
  .hero-inner {
    grid-template-columns: 1fr;
    gap: var(--space-3xl);
  }

  .hero-photo-col {
    order: -1;
  }

  .hero-photo-wrap {
    width: clamp(200px, 50vw, 380px);
  }

  .hero-content-col {
    align-items: flex-start;
  }

  /* Chi sono */
  .chi-sono-body {
    grid-template-columns: 1fr;
    gap: var(--space-3xl);
  }

  /* Services — show one card at a time on tablet */
  .service-card {
    flex: 0 0 calc(50% - var(--space-xl) / 2);
  }

  /* Books — 2 columns for 3-grid */
  .books-grid--three {
    grid-template-columns: repeat(2, 1fr);
  }

  /* Blog — 2 columns */
  .blog-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  /* ISIPC */
  .isipc-split {
    grid-template-columns: 1fr;
  }

  /* Contact */
  .contatti-split {
    grid-template-columns: 1fr;
  }

  /* Footer */
  .footer-top {
    grid-template-columns: 1fr;
  }

  /* Nav links — hide on tablet, show hamburger */
  .nav-links {
    display: none;
  }

  .hamburger {
    display: flex;
  }
}

/* ============================================================
   21. RESPONSIVE — MOBILE (max 768px)
   ============================================================ */
@media (max-width: 768px) {
  /* Hero */
  .hero-stats {
    flex-wrap: wrap;
    gap: var(--space-md);
    justify-content: center;
  }

  .stat-divider {
    display: none;
  }

  .hero-ctas {
    width: 100%;
  }

  .hero-ctas .btn {
    flex: 1;
    text-align: center;
    justify-content: center;
  }

  /* Services — one card at a time on mobile */
  .service-card {
    flex: 0 0 calc(100% - var(--space-xl));
  }

  /* Books — single column */
  .books-grid--three {
    grid-template-columns: 1fr;
  }

  .books-grid--single {
    grid-template-columns: 1fr;
  }

  /* Blog — single column */
  .blog-grid {
    grid-template-columns: 1fr;
  }

  /* Form row — stack */
  .form-row {
    grid-template-columns: 1fr;
  }

  /* Newsletter fields — stack */
  .newsletter-fields {
    flex-direction: column;
  }

  .newsletter-fields .btn {
    width: 100%;
  }

  /* Footer nav — single column */
  .footer-nav {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }

  /* Cookie banner */
  .cookie-banner-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  /* Carousel arrows — hide on mobile (swipe UX) */
  .carousel-arrows {
    display: none;
  }

  /* Scroll indicator — hide on small screens */
  .scroll-indicator {
    display: none;
  }

  /* Testimonial cards */
  .testimonial-card {
    flex: 0 0 min(320px, 85vw);
  }

  /* Newsletter perks — stack */
  .newsletter-perks {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-lg);
  }

  .newsletter-perk {
    max-width: 100%;
  }

  /* Carousel arrows hidden, dots visible */
  .testimonials-nav {
    display: flex;
  }

  /* === FIX 1: Hero image too small at 390px === */
  .hero-photo-wrap {
    width: 80%;
    max-width: 320px;
    margin: 0 auto;
  }

  /* === FIX 2: Single-book card horizontal layout overflows === */
  .books-grid--single .book-card {
    flex-direction: column;
  }
  .books-grid--single .book-card-link {
    width: 100%;
  }
  .books-grid--single {
    max-width: 100%;
  }

  /* === FIX 3: Books grid two columns overflow === */
  .books-grid--two {
    grid-template-columns: 1fr;
    max-width: 100%;
  }

  /* === FIX 4: Disable 3D tilt effects on mobile === */
  .book-card {
    transform: none !important;
    perspective: none;
  }
  .book-card:hover {
    transform: none !important;
  }

  /* === FIX 5: Services carousel swipeable on mobile === */
  .services-track {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scroll-snap-type: x mandatory;
  }
  .service-card {
    scroll-snap-align: center;
    flex: 0 0 calc(100vw - 48px);
  }

  /* === FIX 6: Newsletter section layout fix === */
  .newsletter-inner {
    max-width: 100%;
    box-sizing: border-box;
  }
  .newsletter-perks {
    flex-direction: column;
    align-items: flex-start;
  }
  .newsletter-perk {
    max-width: 100%;
    box-sizing: border-box;
  }
  .newsletter-form {
    max-width: 100%;
    box-sizing: border-box;
  }
  .newsletter-fields {
    flex-direction: column;
    max-width: 100%;
  }
  .newsletter-fields .form-group {
    width: 100%;
    min-width: 0;
    box-sizing: border-box;
  }
  .newsletter-fields input {
    width: 100%;
    box-sizing: border-box;
  }

  /* === FIX 7: General overflow prevention === */
  .section-inner {
    padding-left: 16px;
    padding-right: 16px;
    overflow-x: hidden;
  }
  body {
    overflow-x: hidden;
  }
  section {
    overflow-x: hidden;
  }

  /* === FIX 8: Book card info text truncation === */
  .book-info {
    word-wrap: break-word;
    overflow-wrap: break-word;
  }
  .book-title,
  .book-subtitle {
    word-wrap: break-word;
    overflow-wrap: break-word;
  }
}

/* ============================================================
   22. MOBILE MENU (SLIDE-IN)
   Rule 12: display:none on desktop, display+visibility pattern on mobile
   ============================================================ */
@media (max-width: 1024px) {
  /* Mobile menu: hidden state (display:flex so flex children work; visibility:hidden keeps it invisible) */
  .mobile-menu {
    display: flex;
    visibility: hidden;    /* but invisible */
    position: fixed;
    top: 0;
    right: 0;
    height: 100%;
    width: min(320px, 85vw);
    background: var(--clr-surface);
    border-left: 1px solid var(--clr-border);
    z-index: 300;
    padding: var(--space-3xl) var(--space-xl);
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
    transform: translateX(100%);
    transition: transform var(--duration-slow) var(--ease-out),
                visibility var(--duration-slow);
  }

  /* Mobile menu: open state */
  .mobile-menu.open {
    visibility: visible;
    transform: translateX(0);
  }

  /* Overlay — hidden by default */
  .mobile-menu-overlay {
    display: block;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    z-index: 299;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--duration-slow) var(--ease-out);
  }

  .mobile-menu-overlay.open {
    opacity: 1;
    pointer-events: auto;
  }

  .mobile-menu-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--clr-text-muted);
    background: var(--clr-surface-2);
    border-radius: var(--radius-sm);
    transition: color var(--duration-fast), background var(--duration-fast);
  }

  .mobile-menu-close:hover {
    color: var(--clr-text-light);
    background: var(--clr-border);
  }

  .mobile-menu ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0;
    margin-top: var(--space-xl);
  }

  .mobile-menu-link {
    display: block;
    padding: var(--space-md) 0;
    font-size: var(--fs-lg);
    font-weight: 600;
    color: var(--clr-text);
    border-bottom: 1px solid var(--clr-border);
    transition: color var(--duration-fast);
    text-decoration: none;
  }

  .mobile-menu-link:hover {
    color: var(--clr-amber);
  }

  .mobile-menu-cta {
    width: 100%;
    justify-content: center;
    margin-top: auto;
  }
}

/* ============================================================
   23. PREFERS-REDUCED-MOTION
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .word {
    transform: none;
    opacity: 1;
  }

  .reveal-fade,
  .reveal-up {
    opacity: 1;
    transform: none;
  }

  .timeline-item {
    opacity: 1;
    transform: none;
  }

  .scroll-indicator {
    animation: none;
  }

  .terminal-cursor {
    animation: none;
  }
}

/* ============================================================
   24. FOCUS STYLES (accessibility)
   ============================================================ */
:focus-visible {
  outline: 2px solid var(--clr-amber);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ============================================================
   25. SELECTION COLOUR
   ============================================================ */
::selection {
  background: var(--clr-amber);
  color: var(--clr-base);
}

/* ============================================================
   26. SCROLLBAR (webkit)
   ============================================================ */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: var(--clr-base);
}

::-webkit-scrollbar-thumb {
  background: var(--clr-border);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--clr-amber);
}