/* ═══════════════════════════════════════════════════════════════
   TheWake — Captain's Logbook
   A 3D book with page-turn scroll interaction
   ═══════════════════════════════════════════════════════════════ */

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

/* ─── Design Tokens ─── */
:root {
  --abyss: #0A1118;
  --abyss-deep: #060C12;
  --chart: #EDE7D8;
  --signal-red: #D64545;
  --signal-red-dim: rgba(214, 69, 69, 0.18);
  --phosphor: #4AE0C0;
  --phosphor-dim: rgba(74, 224, 192, 0.12);
  --brass: #A88E4B;
  --brass-dim: rgba(168, 142, 75, 0.2);
  --fog: #5A6E82;
  --fog-light: #7A8EA2;
  --text-main: #D8D4CC;
  --text-dim: #8896A6;

  --font-display: 'Abril Fatface', 'Times New Roman', serif;
  --font-body: 'Newsreader', 'Georgia', 'Times New Roman', serif;
  --font-mono: 'Share Tech Mono', 'Courier New', monospace;

  --page-turn-duration: 0.9s;
  --page-turn-ease: cubic-bezier(0.4, 0.0, 0.2, 1.0);
}

/* ─── Base ─── */
html {
  overflow: hidden;
  height: 100%;
}

body {
  font-family: var(--font-body);
  background: var(--abyss);
  color: var(--text-main);
  height: 100%;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

::selection {
  background: var(--phosphor-dim);
  color: var(--phosphor);
}

/* ─── Book Viewport ─── */
.book-viewport {
  position: fixed;
  inset: 0;
  perspective: 1400px;
  perspective-origin: 50% 50%;
  background: var(--abyss);
  overflow: hidden;
}

/* ─── Book ─── */
.book {
  position: absolute;
  inset: 5vh 5vw;
  transform-style: preserve-3d;
}

/* ─── Spine ─── */
.spine {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 5px;
  height: 100%;
  background: linear-gradient(
    to right,
    rgba(0, 0, 0, 0.15),
    rgba(0, 0, 0, 0.5) 30%,
    rgba(0, 0, 0, 0.7) 50%,
    rgba(0, 0, 0, 0.5) 70%,
    rgba(0, 0, 0, 0.15)
  );
  z-index: 100;
  pointer-events: none;
  border-radius: 1px;
}

/* ─── Spreads ─── */
.spread {
  position: absolute;
  inset: 0;
  transform-style: preserve-3d;
  backface-visibility: hidden;
  visibility: hidden;
  background: var(--abyss);
}

.spread.active {
  visibility: visible;
  z-index: 10;
}

.spread.beneath {
  visibility: visible;
  z-index: 5;
}

/* ─── Pages ─── */
.page {
  position: absolute;
  top: 0;
  height: 100%;
  width: 50%;
  transform-style: preserve-3d;
}

.page-left {
  left: 0;
  border-right: none;
}

.page-right {
  right: 0;
  border-left: none;
}

.page-face {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  overflow: hidden;
  background: var(--abyss);
}

/* Right page backface (visible during forward turn) */
.page-right .page-face.back {
  transform: rotateY(180deg);
  background: var(--abyss-deep);
}

/* Left page backface (visible during backward turn) */
.page-left .page-face.back {
  transform: rotateY(-180deg);
  background: var(--abyss-deep);
}

/* ─── Gutter shadows (book crease) ─── */
.page-left .page-face.front::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 48px;
  height: 100%;
  background: linear-gradient(to left, rgba(0, 0, 0, 0.5), transparent);
  pointer-events: none;
  z-index: 2;
}

.page-right .page-face.front::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 48px;
  height: 100%;
  background: linear-gradient(to right, rgba(0, 0, 0, 0.5), transparent);
  pointer-events: none;
  z-index: 2;
}

/* ─── Page-turn Animation ─── */
.spread.turning-forward .page-right {
  transform-origin: left center;
  animation: turnPageForward var(--page-turn-duration) var(--page-turn-ease) forwards;
}

@keyframes turnPageForward {
  0% {
    transform: rotateY(0deg);
    box-shadow: none;
  }
  15% {
    box-shadow: -8px 0 24px rgba(0, 0, 0, 0.3);
  }
  100% {
    transform: rotateY(-175deg);
    box-shadow: -2px 0 8px rgba(0, 0, 0, 0.15);
  }
}

.spread.turning-backward .page-left {
  transform-origin: right center;
  animation: turnPageBackward var(--page-turn-duration) var(--page-turn-ease) forwards;
}

@keyframes turnPageBackward {
  0% {
    transform: rotateY(0deg);
    box-shadow: none;
  }
  15% {
    box-shadow: 8px 0 24px rgba(0, 0, 0, 0.3);
  }
  100% {
    transform: rotateY(175deg);
    box-shadow: 2px 0 8px rgba(0, 0, 0, 0.15);
  }
}

/* Reveal shadow on the page underneath (controlled by JS via .book.revealing-* classes) */
.spread.beneath .page-right .page-face.front::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to right, rgba(0, 0, 0, 0.45), transparent 35%);
  z-index: 3;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.4s;
}

.spread.beneath .page-left .page-face.front::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to left, rgba(0, 0, 0, 0.45), transparent 35%);
  z-index: 3;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.4s;
}

.book.revealing-right .spread.beneath .page-right .page-face.front::before {
  opacity: 1;
}

.book.revealing-left .spread.beneath .page-left .page-face.front::before {
  opacity: 1;
}

/* ─── Content Layout ─── */
.page-content {
  padding: 12% 10%;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.page-content-centered {
  align-items: center;
  text-align: center;
}

/* ─── Eyebrow ─── */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.22em;
  color: var(--fog);
  text-transform: uppercase;
  margin-bottom: 1.2rem;
}

.eyebrow-accent-red {
  color: var(--signal-red);
}

.eyebrow-accent-teal {
  color: var(--phosphor);
}

/* ─── Page Title ─── */
.page-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 400;
  color: var(--text-main);
  line-height: 1.15;
  margin-bottom: 1.5rem;
  letter-spacing: 0.01em;
}

/* ─── Page Body ─── */
.page-body {
  font-family: var(--font-body);
  font-size: clamp(0.9rem, 1.3vw, 1rem);
  line-height: 1.85;
  color: var(--text-dim);
  margin-bottom: 1rem;
}

/* ─── Page Big Stat ─── */
.page-big-stat {
  font-family: var(--font-display);
  font-size: clamp(3rem, 7vw, 5.5rem);
  color: var(--text-main);
  line-height: 1;
  margin-bottom: 1.2rem;
}

.page-stat-sep {
  color: var(--signal-red);
  margin: 0 0.05em;
}

/* ─── Page Quote ─── */
.page-quote {
  font-family: var(--font-body);
  font-style: italic;
  font-size: clamp(0.9rem, 1.4vw, 1.1rem);
  color: var(--text-dim);
  line-height: 1.7;
  max-width: 28ch;
  margin-bottom: 0.6rem;
}

.page-cite {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--fog);
  font-style: normal;
}

/* ─── Cover Spread ─── */
.cover-content {
  padding: 12% 10%;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.cover-title {
  font-family: var(--font-display);
  font-size: clamp(3rem, 6.5vw, 5.5rem);
  font-weight: 400;
  color: var(--text-main);
  line-height: 1;
  letter-spacing: 0.12em;
  margin-bottom: 0.3rem;
}

.cover-subtitle {
  font-family: var(--font-body);
  font-size: clamp(1.2rem, 2.2vw, 1.8rem);
  color: var(--fog);
  letter-spacing: 0.25em;
  margin-bottom: 1.5rem;
}

.cover-divider {
  width: 36px;
  height: 2px;
  background: var(--brass);
  margin-bottom: 1.5rem;
  opacity: 0.6;
}

.cover-tagline {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  color: var(--fog);
  margin-bottom: 0.6rem;
}

.cover-desc {
  font-family: var(--font-body);
  font-size: 0.9rem;
  color: var(--text-dim);
  letter-spacing: 0.04em;
  margin-bottom: 1.5rem;
}

.cover-version {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.15em;
  color: var(--fog);
  padding: 4px 12px;
  border: 1px solid rgba(90, 110, 130, 0.25);
  border-radius: 3px;
  display: inline-block;
}

/* ─── Sonar Canvas ─── */
.sonar-canvas {
  width: 100%;
  height: 100%;
  display: block;
  background: var(--abyss);
}

/* ─── Dramatic text (Spread 2 left) ─── */
.page-dramatic {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 3rem);
  color: var(--text-main);
  line-height: 1.25;
  letter-spacing: 0.03em;
  margin-bottom: 1rem;
}

.page-dramatic-sub {
  font-family: var(--font-body);
  font-style: italic;
  font-size: clamp(0.85rem, 1.3vw, 1rem);
  color: var(--fog);
  margin-bottom: 3rem;
}

/* ─── Depth marks (Spread 2 left) ─── */
.depth-marks {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: center;
}

.depth-mark {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--phosphor);
  letter-spacing: 0.08em;
  padding: 6px 18px;
  border: 1px solid rgba(74, 224, 192, 0.2);
  border-radius: 2px;
  background: rgba(74, 224, 192, 0.04);
  position: relative;
}

.depth-mark::before {
  content: '';
  position: absolute;
  left: -8px;
  top: 50%;
  width: 6px;
  height: 1px;
  background: var(--phosphor);
  opacity: 0.5;
}

.depth-unit {
  font-size: 0.65rem;
  opacity: 0.5;
  margin-left: 2px;
}

/* ─── Concept tags (Spread 2 right) ─── */
.concept-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 1.5rem;
}

.concept-tag {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  color: var(--phosphor);
  padding: 5px 12px;
  border: 1px solid rgba(74, 224, 192, 0.2);
  border-radius: 2px;
  background: rgba(74, 224, 192, 0.05);
}

/* ─── Force Cards (Spread 3) ─── */
.force-list {
  list-style: none;
  margin: 1.2rem 0;
}

.force-list li {
  display: flex;
  gap: 10px;
  align-items: baseline;
  padding: 8px 0;
  border-bottom: 1px solid rgba(90, 110, 130, 0.12);
  font-size: clamp(0.78rem, 1.1vw, 0.88rem);
  color: var(--text-dim);
  line-height: 1.5;
}

.force-list li:last-child {
  border-bottom: none;
}

.force-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 400;
  letter-spacing: 0.08em;
  color: var(--signal-red);
  padding: 2px 8px;
  border: 1px solid var(--signal-red-dim);
  border-radius: 2px;
  background: var(--signal-red-dim);
  flex-shrink: 0;
}

.force-tag-blue {
  color: var(--phosphor);
  border-color: rgba(74, 224, 192, 0.2);
  background: rgba(74, 224, 192, 0.08);
}

.force-weapons {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 0.8rem;
}

.force-weapon {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.06em;
  color: var(--brass);
  padding: 3px 10px;
  border: 1px solid var(--brass-dim);
  border-radius: 2px;
  background: var(--brass-dim);
}

.force-weapon-blue {
  color: var(--phosphor);
  border-color: rgba(74, 224, 192, 0.12);
  background: rgba(74, 224, 192, 0.05);
}

/* ─── Tech Specs (Spread 4 left) ─── */
.tech-specs {
  margin-top: 0.5rem;
}

.tech-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 10px 0;
  border-bottom: 1px solid rgba(90, 110, 130, 0.12);
}

.tech-row dt {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  color: var(--fog);
  text-transform: uppercase;
}

.tech-row dd {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-dim);
  letter-spacing: 0.04em;
}

/* ─── Deploy Buttons (Spread 4 right) ─── */
.deploy-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 1.5rem 0 1.2rem;
}

.deploy-btn {
  display: inline-flex;
  align-items: center;
  padding: 12px 28px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-decoration: none;
  border-radius: 3px;
  cursor: pointer;
  transition: all 0.25s;
  border: 1px solid transparent;
}

.deploy-btn-primary {
  background: var(--phosphor);
  color: var(--abyss);
  border-color: var(--phosphor);
}

.deploy-btn-primary:hover {
  background: transparent;
  color: var(--phosphor);
}

.deploy-btn-outline {
  background: transparent;
  color: var(--text-dim);
  border-color: rgba(90, 110, 130, 0.3);
}

.deploy-btn-outline:hover {
  border-color: var(--text-dim);
  color: var(--text-main);
}

.page-footnote {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--fog);
  letter-spacing: 0.04em;
  line-height: 1.8;
}

.page-footnote code {
  font-family: var(--font-mono);
  background: rgba(90, 110, 130, 0.1);
  padding: 2px 6px;
  border-radius: 2px;
  color: var(--text-dim);
}

/* ─── Page Edges (stacked paper effect) ─── */
.page-edges {
  position: fixed;
  pointer-events: none;
  z-index: 50;
}

.page-edges-left {
  top: 5vh;
  left: 5vw;
  bottom: 5vh;
  width: 4px;
  background: repeating-linear-gradient(
    to bottom,
    rgba(90, 110, 130, 0.12) 0px,
    rgba(90, 110, 130, 0.12) 2px,
    transparent 2px,
    transparent 5px
  );
}

.page-edges-right {
  top: 5vh;
  right: 5vw;
  bottom: 5vh;
  width: 4px;
  background: repeating-linear-gradient(
    to bottom,
    rgba(90, 110, 130, 0.12) 0px,
    rgba(90, 110, 130, 0.12) 2px,
    transparent 2px,
    transparent 5px
  );
}

.page-edges-bottom {
  bottom: 5vh;
  left: 5vw;
  right: 5vw;
  height: 3px;
  background: repeating-linear-gradient(
    to right,
    rgba(90, 110, 130, 0.1) 0px,
    rgba(90, 110, 130, 0.1) 2px,
    transparent 2px,
    transparent 5px
  );
}

/* ─── Page Indicators ─── */
.page-indicators {
  position: fixed;
  bottom: 2vh;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
  z-index: 200;
}

.pgi {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  border: 1px solid rgba(90, 110, 130, 0.35);
  background: transparent;
  cursor: pointer;
  transition: all 0.3s;
  padding: 0;
}

.pgi:hover {
  border-color: var(--fog-light);
}

.pgi.active {
  background: var(--phosphor);
  border-color: var(--phosphor);
  box-shadow: 0 0 8px rgba(74, 224, 192, 0.3);
}

/* ─── Language Switch ─── */
.lang-switch {
  position: fixed;
  top: 2.5vh;
  right: calc(5vw + 24px);
  z-index: 200;
  display: flex;
  align-items: center;
  gap: 6px;
}

.lang-btn {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--fog);
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px 8px;
  transition: color 0.25s;
}

.lang-btn:hover {
  color: var(--text-dim);
}

.lang-btn.active {
  color: var(--phosphor);
}

.lang-sep {
  color: rgba(90, 110, 130, 0.3);
  font-size: 0.65rem;
}

/* ─── Scroll Hint ─── */
.scroll-hint {
  position: fixed;
  bottom: 5vh;
  right: calc(5vw + 24px);
  z-index: 200;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.scroll-icon {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--fog);
  animation: scrollHintBounce 2s ease-in-out infinite;
}

@keyframes scrollHintBounce {
  0%, 100% { opacity: 0.3; transform: translateY(0); }
  50% { opacity: 0.8; transform: translateY(6px); }
}

/* ═══════════════════════════════════════════════════════════════
   Responsive — Mobile / Tablet
   ═══════════════════════════════════════════════════════════════ */

@media (max-width: 768px) {
  .book {
    inset: 3vh 3vw;
  }

  .spine {
    width: 3px;
  }

  .page-edges-left,
  .page-edges-right,
  .page-edges-bottom {
    display: none;
  }

  .spread {
    /* On mobile, spreads become single-column cards */
  }

  .page {
    width: 50%;
  }

  .page-content {
    padding: 10% 8%;
  }

  .lang-switch {
    top: 1.5vh;
    right: calc(3vw + 16px);
  }

  .scroll-hint {
    bottom: 3vh;
    right: calc(3vw + 16px);
  }

  .page-indicators {
    bottom: 1.5vh;
  }
}

@media (max-width: 560px) {
  .book {
    inset: 2vh 0;
  }

  /* Stack pages vertically, hide book chrome */
  .spread {
    display: flex;
    flex-direction: column;
  }

  .page {
    position: relative;
    width: 100%;
    height: 50%;
  }

  .page-left {
    left: 0;
  }

  .page-right {
    right: auto;
  }

  .spine {
    display: none;
  }

  .page-edges-left,
  .page-edges-right,
  .page-edges-bottom {
    display: none;
  }

  .page-right .page-face.front::after,
  .page-left .page-face.front::after {
    display: none;
  }

  .page-content {
    padding: 6% 8%;
  }

  .cover-title {
    font-size: clamp(2rem, 8vw, 3rem);
    letter-spacing: 0.06em;
  }

  .page-big-stat {
    font-size: clamp(2rem, 9vw, 3.5rem);
  }

  .page-dramatic {
    font-size: clamp(1.3rem, 5.5vw, 2rem);
  }

  .depth-marks {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px;
  }

  .depth-mark::before {
    display: none;
  }

  /* Replace 3D page turn with crossfade on mobile */
  @keyframes turnPageForward {
    0% { transform: rotateY(0deg); opacity: 1; }
    100% { transform: rotateY(-90deg); opacity: 0; }
  }

  @keyframes turnPageBackward {
    0% { transform: rotateY(0deg); opacity: 1; }
    100% { transform: rotateY(90deg); opacity: 0; }
  }

  .book.revealing-right .spread.beneath .page-right .page-face.front::before,
  .book.revealing-left .spread.beneath .page-left .page-face.front::before {
    opacity: 0;
  }

  .force-list li {
    font-size: 0.78rem;
  }

  .cover-content {
    padding: 6% 8%;
  }

  .deploy-buttons {
    flex-direction: column;
  }

  .deploy-btn {
    text-align: center;
    justify-content: center;
  }
}

/* ═══════════════════════════════════════════════════════════════
   Reduced Motion
   ═══════════════════════════════════════════════════════════════ */

@media (prefers-reduced-motion: reduce) {
  .spread.turning-forward .page-right,
  .spread.turning-backward .page-left {
    animation: none !important;
    transition: opacity 0.4s ease !important;
    opacity: 0;
  }

  .scroll-icon {
    animation: none;
  }
}

/* ═══════════════════════════════════════════════════════════════
   Print
   ═══════════════════════════════════════════════════════════════ */

@media print {
  .book-viewport {
    position: static;
    perspective: none;
  }
  .spread {
    position: static;
    visibility: visible;
    page-break-after: always;
  }
  .spine,
  .page-indicators,
  .lang-switch,
  .scroll-hint,
  .page-edges {
    display: none;
  }
}