/* ==========================================================================
   1. CSS VARIABLES & THEME TOKENS
   ========================================================================== */
:root,
[data-theme="light"] {
  --bg: #F2EBE4;
  --surface: #FFFFFF;
  --text: #0D141B;
  --muted: #969696;
  --border: rgba(13, 20, 27, 0.14);
  --border-strong: rgba(13, 20, 27, 0.32);
  --canvas-stage-bg: rgba(255, 255, 255, 0.35);

  --font-serif: 'Instrument Serif', Georgia, 'Times New Roman', serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  --container-max: 1320px;
  --gutter: 2.5rem;
  --transition-base: 260ms cubic-bezier(0.22, 1, 0.36, 1);
}

[data-theme="dark"] {
  --bg: #0E0E0E;
  --surface: #1C1C1A;
  --text: #E9E1D5;
  --muted: #8A857B;
  --border: rgba(233, 225, 213, 0.14);
  --border-strong: rgba(233, 225, 213, 0.35);
  --canvas-stage-bg: rgba(28, 28, 26, 0.45);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  background-color: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-weight: 400;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color var(--transition-base), color var(--transition-base);
  overflow-x: hidden;
  position: relative;
}

/* Subtle fixed film grain / noise overlay */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 9999;
  opacity: 0.04;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-base), opacity var(--transition-base);
}

ul {
  list-style: none;
}

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

/* Focus states for keyboard accessibility */
:focus-visible {
  outline: 1px solid var(--text);
  outline-offset: 4px;
}

/* ==========================================================================
   3. TYPOGRAPHY & UTILITY CLASSES
   ========================================================================== */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.mono-label,
.section-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  line-height: 1.4;
}

.section-title {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(2.1rem, 3.5vw, 3rem);
  line-height: 1.1;
  letter-spacing: -0.01em;
}

/* Gentle Fade-in Animation */
.fade-in {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 700ms ease, transform 700ms cubic-bezier(0.22, 1, 0.36, 1);
}

.fade-in.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ==========================================================================
   4. NAVBAR
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--bg);
  border-bottom: 1px solid var(--border);
  transition: background-color var(--transition-base), border-color var(--transition-base);
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 4.5rem;
  gap: 1.5rem;
}

.nav-brand {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  letter-spacing: -0.01em;
  white-space: nowrap;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2.25rem;
}

.nav-links a {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  position: relative;
  padding-block: 0.25rem;
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background-color: var(--text);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--transition-base);
}

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

.nav-links a:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

/* Theme Toggle Button */
.theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.45rem 0.75rem;
  border: 1px solid var(--border);
  background-color: var(--surface);
  transition: border-color var(--transition-base), background-color var(--transition-base);
}

.theme-toggle:hover {
  border-color: var(--border-strong);
}

.theme-indicator {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background-color: var(--text);
  display: inline-block;
  transition: background-color var(--transition-base);
}

.theme-toggle .mono-label {
  color: var(--text);
  font-size: 0.7rem;
}

/* ==========================================================================
   5. HERO SECTION (Text Left / 3D Canvas Right)
   ========================================================================== */
.hero-section {
  padding-top: clamp(3rem, 6vw, 5.5rem);
  padding-bottom: clamp(3.5rem, 7vw, 6rem);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  align-items: center;
  gap: clamp(2.5rem, 5vw, 5rem);
}

.hero-content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.hero-content .section-label {
  margin-bottom: 1.25rem;
}

.hero-title {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(3.25rem, 6vw, 5.5rem);
  line-height: 0.98;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
}

.hero-intro {
  font-size: clamp(1.025rem, 1.35vw, 1.2rem);
  color: var(--text);
  max-width: 34ch;
  font-weight: 300;
  line-height: 1.65;
  margin-bottom: 2.5rem;
}

.hero-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border);
  width: 100%;
  max-width: 26rem;
}

.meta-separator {
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

/* 3D Canvas Stage */
.hero-visual {
  display: flex;
  flex-direction: column;
  width: 100%;
}

.book-canvas-container {
  position: relative;
  width: 100%;
  height: 500px;
  border: 1px solid var(--border);
  background-color: var(--canvas-stage-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  cursor: grab;
  /* Allow vertical page scroll on mobile while horizontal gestures rotate the book */
  touch-action: pan-y;
  user-select: none;
  -webkit-user-select: none;
  transition: border-color var(--transition-base), background-color var(--transition-base);
}

.book-canvas-container:active {
  cursor: grabbing;
}

.book-canvas-container canvas {
  display: block;
  width: 100% !important;
  height: 100% !important;
  outline: none;
}

.book-fallback {
  padding: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
}

.book-fallback[hidden] {
  display: none !important;
}

.book-fallback-img {
  max-height: 360px;
  width: auto;
  aspect-ratio: 2 / 3;
  object-fit: cover;
  border: 1px solid var(--border);
}

.canvas-caption {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding-top: 0.75rem;
  flex-wrap: wrap;
}

/* ==========================================================================
   6. SHARED EDITORIAL SECTION STRUCTURE
   ========================================================================== */
.editorial-section {
  padding-top: clamp(3.5rem, 6vw, 5.5rem);
  padding-bottom: clamp(3.5rem, 6vw, 5.5rem);
  border-top: 1px solid var(--border);
}

.section-top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.75rem;
}

.section-header-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.view-all-link {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding-bottom: 0.2rem;
  border-bottom: 1px solid var(--border-strong);
  transition: border-color var(--transition-base), color var(--transition-base);
  white-space: nowrap;
}

.view-all-link span {
  transition: transform var(--transition-base);
}

.view-all-link:hover {
  border-color: var(--text);
}

.view-all-link:hover span {
  transform: translateX(3px);
}

/* ==========================================================================
   7. CURRENTLY READING & WATCHING (2 Side-by-Side Cards)
   ========================================================================== */
.currently-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}

.currently-card {
  background-color: var(--surface);
  border: 1px solid var(--border);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  transition: background-color var(--transition-base), border-color var(--transition-base);
}

.currently-card:hover {
  border-color: var(--border-strong);
}

.currently-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}

.currently-card-body {
  display: grid;
  grid-template-columns: 115px 1fr;
  gap: 1.5rem;
  align-items: start;
}

.currently-thumb {
  width: 100%;
  aspect-ratio: 2 / 3;
  object-fit: cover;
  border: 1px solid var(--border);
  filter: grayscale(100%) contrast(1.04);
  transition: filter var(--transition-base);
}

.currently-card:hover .currently-thumb {
  filter: grayscale(40%) contrast(1.02);
}

.currently-info {
  display: flex;
  flex-direction: column;
}

.currently-title {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: 1.85rem;
  line-height: 1.12;
  margin-bottom: 0.35rem;
}

.currently-creator {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  margin-bottom: 1rem;
}

.currently-note {
  font-size: 0.9375rem;
  color: var(--text);
  font-weight: 300;
  line-height: 1.6;
}

/* ==========================================================================
   8. FAVORITE BOOKS & FILMS (Horizontal Row of 5 Covers / Posters)
   ========================================================================== */
.archive-row {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 1.75rem;
}

.archive-item {
  display: flex;
  flex-direction: column;
  group: archive-card;
}

.archive-cover-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 2 / 3;
  overflow: hidden;
  border: 1px solid var(--border);
  background-color: var(--surface);
  margin-bottom: 0.9rem;
}

.archive-cover {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(100%) contrast(1.05);
  transition: transform 500ms cubic-bezier(0.22, 1, 0.36, 1), filter 500ms ease;
}

.archive-item:hover .archive-cover {
  transform: scale(1.025);
  filter: grayscale(20%) contrast(1.02);
}

.archive-meta-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.3rem;
}

.archive-index {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--muted);
  letter-spacing: 0.08em;
}

.archive-title {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: 1.4rem;
  line-height: 1.18;
  margin-bottom: 0.2rem;
  color: var(--text);
}

.archive-subtitle {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ==========================================================================
   9. LATEST NOTES (3 Numbered Rows with Thin Divider Lines)
   ========================================================================== */
.notes-list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--border);
}

.note-row {
  border-bottom: 1px solid var(--border);
}

.note-link {
  display: grid;
  grid-template-columns: 3.5rem 1fr auto;
  align-items: baseline;
  gap: 1.5rem;
  padding-block: 1.6rem;
  transition: padding-left var(--transition-base);
}

.note-link:hover {
  padding-left: 0.5rem;
}

.note-number {
  color: var(--muted);
}

.note-title {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(1.45rem, 2.2vw, 1.95rem);
  line-height: 1.2;
  color: var(--text);
  transition: color var(--transition-base);
}

.note-date {
  white-space: nowrap;
  text-align: right;
}

/* ==========================================================================
   10. SHORT ABOUT SECTION
   ========================================================================== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 2.5rem;
  align-items: start;
}

.about-content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1.5rem;
}

.about-text {
  font-size: clamp(1.05rem, 1.4vw, 1.25rem);
  font-weight: 300;
  line-height: 1.7;
  max-width: 58ch;
}

/* ==========================================================================
   11. FOOTER
   ========================================================================== */
.site-footer {
  padding-top: 2rem;
  padding-bottom: 3.5rem;
}

.footer-inner {
  border-top: 1px solid var(--border);
  padding-top: 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.footer-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.footer-links a {
  color: var(--muted);
  transition: color var(--transition-base);
}

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

/* ==========================================================================
   12. RESPONSIVE BREAKPOINTS (Tablet & Mobile 390px)
   ========================================================================== */
@media (max-width: 1024px) {
  :root {
    --gutter: 1.75rem;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .book-canvas-container {
    height: 440px;
  }

  .currently-grid {
    grid-template-columns: 1fr;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }
}

@media (max-width: 768px) {
  :root {
    --gutter: 1.25rem;
  }

  /* Compact Navbar for Mobile 390px */
  .navbar {
    flex-wrap: wrap;
    padding-block: 0.85rem;
    gap: 0.75rem;
  }

  .nav-brand {
    font-size: 1.3rem;
  }

  .theme-toggle {
    padding: 0.35rem 0.6rem;
  }

  .nav-links {
    order: 3;
    width: 100%;
    justify-content: space-between;
    padding-top: 0.65rem;
    border-top: 1px solid var(--border);
    gap: 0.5rem;
  }

  /* Hero Mobile */
  .hero-section {
    padding-top: 2.25rem;
    padding-bottom: 3rem;
  }

  .hero-title {
    font-size: 3.1rem;
  }

  .book-canvas-container {
    height: 360px;
  }

  .canvas-caption {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.25rem;
  }

  /* Currently Cards Mobile */
  .currently-card {
    padding: 1.25rem;
  }

  .currently-card-body {
    grid-template-columns: 92px 1fr;
    gap: 1.1rem;
  }

  .currently-title {
    font-size: 1.5rem;
  }

  /* Horizontal Scroll on Mobile for Favorite Books & Films */
  .archive-row {
    display: flex;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    gap: 1.15rem;
    padding-bottom: 1rem;
    margin-inline: calc(var(--gutter) * -1);
    padding-inline: var(--gutter);
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
  }

  .archive-item {
    flex: 0 0 64%;
    max-width: 230px;
    scroll-snap-align: start;
  }

  /* Notes Mobile */
  .note-link {
    grid-template-columns: 2.25rem 1fr;
    gap: 0.5rem 0.75rem;
    padding-block: 1.25rem;
  }

  .note-date {
    grid-column: 2;
    text-align: left;
    margin-top: 0.2rem;
  }

  /* Footer Mobile */
  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* ==========================================================================
   13. REDUCED MOTION PREFERENCES
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .fade-in {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .archive-cover,
  .view-all-link span,
  .note-link {
    transition: none;
  }
}