/* ==========================================================================
   AUTHENTIC 3D BROADSHEET NEWSPAPER PAGE TURN ENGINE
   Cinematic Zoom-Out -> 3D Physical Sheet Turn -> Zoom-In Choreography
   ========================================================================== */

/* Full Screen Viewport Constraints */
html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
}

/* Full Viewport Stage with 3D Perspective */
.newspaper-viewport {
  position: relative;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  background-color: var(--desk-bg);
  perspective: 2200px;
  perspective-origin: 50% 50%;
  user-select: none;
}

/* 3D Camera Rig — Zooms out to reveal desk angle during page turns */
.newspaper-camera {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  transition: transform 0.65s cubic-bezier(0.22, 1, 0.36, 1);
  will-change: transform;
  transform: translate3d(0, 0, 0) scale(1) rotateX(0deg) rotateY(0deg);
}

/* Zoomed-Out State: Camera pulls back, tilts to reveal angled mahogany desk */
.newspaper-camera.zoomed-out {
  transform: translate3d(0, -15px, -180px) scale(0.85) rotateX(15deg) rotateY(-5deg);
}

/* 3D Desk Surface where Broadsheets Rest */
.newspaper-desk {
  width: 100%;
  max-width: 1480px;
  height: 100vh;
  margin: 0 auto;
  position: relative;
  transform-style: preserve-3d;
}

/* Individual Broadsheet Pages Stacked on the Desk */
.newspaper-page {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--paper-bg);
  transform-origin: left center;
  transform-style: preserve-3d;
  transition: transform 0.85s cubic-bezier(0.25, 0.46, 0.45, 0.94),
              box-shadow 0.85s ease;
  will-change: transform;
  box-shadow: 
    0 15px 45px rgba(0, 0, 0, 0.45),
    0 2px 10px rgba(0, 0, 0, 0.2);
  border-left: 2px solid var(--border-rule);
  border-right: 2px solid var(--border-rule);
}

/* Stack hierarchy for 4 broadsheet pages */
.newspaper-page.page-1 {
  z-index: 40;
}

.newspaper-page.page-2 {
  z-index: 30;
}

.newspaper-page.page-3 {
  z-index: 20;
}

.newspaper-page.page-4 {
  z-index: 10;
}

/* Turned / Flipped States (Left Stack) */
.newspaper-page.page-1.turned {
  transform: rotateY(-180deg);
  z-index: 5;
  pointer-events: none;
  box-shadow: -15px 15px 45px rgba(0, 0, 0, 0.4);
}

.newspaper-page.page-2.turned {
  transform: rotateY(-180deg);
  z-index: 6;
  pointer-events: none;
  box-shadow: -15px 15px 45px rgba(0, 0, 0, 0.4);
}

.newspaper-page.page-3.turned {
  transform: rotateY(-180deg);
  z-index: 7;
  pointer-events: none;
  box-shadow: -15px 15px 45px rgba(0, 0, 0, 0.4);
}

/* Active page pointer events */
.newspaper-page.active {
  pointer-events: auto;
}

/* Internal Scrollable Content for Each Page */
.page-content-scroll {
  width: 100%;
  height: 100%;
  overflow-y: auto;
  overflow-x: hidden;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: var(--ink-muted) transparent;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  user-select: auto;
  position: relative;
  background-color: var(--paper-bg);
}

.page-content-scroll::-webkit-scrollbar {
  width: 5px;
}

.page-content-scroll::-webkit-scrollbar-thumb {
  background-color: rgba(0, 0, 0, 0.25);
  border-radius: 2px;
}

html.night-edition .page-content-scroll::-webkit-scrollbar-thumb {
  background-color: rgba(255, 255, 255, 0.2);
}

/* Running Header for Sections II and III */
.page-running-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 24px;
  background: var(--paper-bg);
  border-bottom: 2px solid var(--border-rule);
  font-family: var(--font-display-condensed);
  font-size: 11px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--ink-black);
}

.page-running-header .header-center {
  font-family: var(--font-masthead);
  font-size: 20px;
  color: var(--ink-black);
  text-decoration: none;
}

@media (max-width: 1024px) {
  .page-running-header {
    padding: 8px 18px;
  }
}

/* On Tablets & Phones: Two-Tier Authentic Newspaper Header Layout */
@media (max-width: 768px) {
  .page-running-header {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: auto auto;
    row-gap: 4px;
    column-gap: 8px;
    padding: 8px 14px 10px;
    align-items: center;
  }

  .page-running-header .header-left {
    grid-column: 1;
    grid-row: 1;
    font-size: 9px;
    font-weight: 700;
    letter-spacing: 1px;
    color: var(--ink-muted);
    font-family: var(--font-mono);
    text-align: left;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .page-running-header .header-right {
    grid-column: 2;
    grid-row: 1;
    font-size: 9px;
    font-weight: 700;
    letter-spacing: 0.8px;
    color: var(--ink-muted);
    font-family: var(--font-mono);
    text-align: right;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .page-running-header .header-center {
    grid-column: 1 / span 2;
    grid-row: 2;
    text-align: center;
    font-family: var(--font-masthead);
    font-size: 20px;
    line-height: 1.15;
    color: var(--ink-black);
    padding-top: 4px;
    margin-top: 2px;
    border-top: 1px dashed var(--border-hairline);
    display: block;
    width: 100%;
    white-space: nowrap;
  }
}

/* Sub-breakpoint: Modern Phones (390px - 480px) */
@media (max-width: 480px) {
  .page-running-header {
    padding: 6px 12px 8px;
    row-gap: 3px;
  }
  .page-running-header .header-left,
  .page-running-header .header-right {
    font-size: 8.5px;
    letter-spacing: 0.6px;
  }
  .page-running-header .header-center {
    font-size: 18.5px;
    padding-top: 3px;
  }
}

/* Sub-breakpoint: Compact Phones (360px - 389px) */
@media (max-width: 389px) {
  .page-running-header {
    padding: 5px 10px 6px;
    row-gap: 2px;
  }
  .page-running-header .header-left,
  .page-running-header .header-right {
    font-size: 8px;
    letter-spacing: 0.4px;
  }
  .page-running-header .header-center {
    font-size: 17px;
  }
}

/* Sub-breakpoint: Ultra-Small & Fold (<= 320px) */
@media (max-width: 320px) {
  .page-running-header {
    padding: 4px 6px 5px;
    row-gap: 2px;
  }
  .page-running-header .header-left,
  .page-running-header .header-right {
    font-size: 7px;
    letter-spacing: 0.2px;
  }
  .page-running-header .header-center {
    font-size: 15px;
  }
}

/* Page Turn Strip at the Bottom of Each Page */
.page-turn-strip {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 24px;
  background: var(--paper-bg);
  border-top: 2px solid var(--border-rule);
  margin-top: 30px;
  user-select: none;
}

.page-strip-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 1px;
  color: var(--ink-muted);
  text-transform: uppercase;
}

.page-turn-btn {
  background: var(--ink-black);
  color: var(--paper-bg);
  border: 1px solid var(--ink-black);
  padding: 8px 18px;
  font-family: var(--font-display-condensed);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  cursor: pointer;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.page-turn-btn:hover {
  background: var(--accent-red);
  border-color: var(--accent-red);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.page-turn-btn.prev-btn {
  background: transparent;
  color: var(--ink-black);
  border-color: var(--border-rule);
}

.page-turn-btn.prev-btn:hover {
  background: var(--ink-black);
  color: var(--paper-bg);
  border-color: var(--ink-black);
}

@media (max-width: 768px) {
  .page-turn-strip {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    padding: 14px 16px;
    margin-top: 24px;
    gap: 10px;
  }

  .page-strip-label {
    width: 100%;
    order: 1;
    text-align: center;
    font-size: 10px;
    letter-spacing: 1.5px;
    color: var(--ink-muted);
    padding-bottom: 6px;
    border-bottom: 1px dashed var(--border-hairline);
    margin-bottom: 2px;
  }

  .page-turn-btn {
    order: 2;
    padding: 9px 14px;
    font-size: 11px;
    letter-spacing: 0.8px;
    flex: 1;
    min-width: 120px;
    justify-content: center;
    text-align: center;
  }
}

/* Sub-breakpoint: Modern Phones (390px - 480px) */
@media (max-width: 480px) {
  .page-turn-strip {
    padding: 12px 12px;
    gap: 8px;
  }
  .page-turn-btn {
    padding: 8px 10px;
    font-size: 10px;
    min-width: 100px;
    letter-spacing: 0.5px;
  }
}

/* Sub-breakpoint: Compact Phones (360px - 389px) */
@media (max-width: 389px) {
  .page-turn-btn {
    padding: 7px 8px;
    font-size: 9.5px;
    letter-spacing: 0.4px;
    min-width: 90px;
  }
}

/* Sub-breakpoint: Budget & Fold Outer (<= 320px) */
@media (max-width: 320px) {
  .page-turn-strip {
    padding: 8px 6px;
    gap: 6px;
  }
  .page-turn-btn {
    padding: 6px 6px;
    font-size: 9px;
    letter-spacing: 0.3px;
    min-width: 80px;
    gap: 4px;
  }
}

/* 3D Back Face of the Paper Sheet (Revealed when Page is Turned 180deg) */
.page-back-face {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--paper-bg);
  background-image: 
    radial-gradient(circle at 50% 50%, rgba(0, 0, 0, 0.05) 0%, transparent 80%),
    repeating-linear-gradient(0deg, transparent, transparent 3px, rgba(0,0,0,0.015) 3px, rgba(0,0,0,0.015) 6px);
  transform: rotateY(180deg);
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 60px 80px;
  box-sizing: border-box;
  pointer-events: none;
  border-left: 2px solid var(--border-rule);
  border-right: 2px solid var(--border-rule);
  user-select: none;
}

html.night-edition .page-back-face {
  background-color: var(--paper-bg);
  background-image: 
    radial-gradient(circle at 50% 50%, rgba(255, 255, 255, 0.03) 0%, transparent 80%),
    repeating-linear-gradient(0deg, transparent, transparent 3px, rgba(255,255,255,0.01) 3px, rgba(255,255,255,0.01) 6px);
}

.page-back-meta {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--ink-muted);
  border-bottom: 1px dashed var(--border-rule);
  padding-bottom: 12px;
}

.page-back-watermark {
  font-family: var(--font-masthead);
  font-size: 84px;
  text-align: center;
  color: rgba(0, 0, 0, 0.07);
  letter-spacing: 14px;
  text-transform: uppercase;
  line-height: 1;
}

html.night-edition .page-back-watermark {
  color: rgba(255, 255, 255, 0.06);
}

.page-back-footer {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--ink-muted);
  border-top: 1px dashed var(--border-rule);
  padding-top: 12px;
}

/* Persistent Floating Pager (Bottom Right on Desktop, Centered Pill on Mobile) */
.newspaper-floating-pager {
  position: fixed;
  bottom: 24px;
  right: 28px;
  z-index: 990;
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--paper-bg);
  border: 1px solid var(--border-rule);
  border-radius: 4px;
  padding: 6px 10px;
  box-shadow: 
    0 10px 25px rgba(0, 0, 0, 0.28),
    0 2px 6px rgba(0, 0, 0, 0.12);
  user-select: none;
  transition: opacity 0.25s ease, transform 0.25s ease;
}

.newspaper-floating-pager.docked-hidden {
  opacity: 0 !important;
  pointer-events: none !important;
  transform: translateY(16px) !important;
}

.pager-btn {
  background: transparent;
  border: 1px solid transparent;
  padding: 6px 10px;
  font-family: var(--font-display-condensed);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--ink-black);
  cursor: pointer;
  border-radius: 3px;
  transition: all 0.2s ease;
}

.pager-btn:hover:not(:disabled) {
  background: var(--ink-black);
  color: var(--paper-bg);
}

.pager-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.pager-indicator {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1.5px;
  color: var(--ink-black);
  padding: 0 8px;
  border-left: 1px solid var(--border-rule);
  border-right: 1px solid var(--border-rule);
}

/* ===================================================================
   FLOATING "KEEP SCROLLING" PROMPT (Phones, Tablets & Desktops)
   Invites reading below the fold, fades out gracefully on scroll
   =================================================================== */

.newspaper-scroll-cue {
  position: fixed;
  bottom: 22px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 900;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(246, 243, 237, 0.94);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--border-rule, #1a1a1a);
  border-radius: 999px;
  padding: 7px 16px;
  color: var(--ink-black, #111111);
  font-family: var(--font-mono, monospace);
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 1.4px;
  text-transform: uppercase;
  user-select: none;
  cursor: pointer;
  box-shadow: 
    0 4px 16px rgba(0, 0, 0, 0.16),
    0 1px 3px rgba(0, 0, 0, 0.08),
    inset 0 1px 0 rgba(255, 255, 255, 0.7);
  opacity: 1;
  visibility: visible;
  transition: 
    opacity 0.35s cubic-bezier(0.16, 1, 0.3, 1),
    transform 0.35s cubic-bezier(0.16, 1, 0.3, 1),
    visibility 0.35s,
    background-color 0.2s ease,
    color 0.2s ease,
    box-shadow 0.2s ease;
}

.newspaper-scroll-cue:hover {
  background: var(--ink-black, #111111);
  color: var(--paper-bg, #f4efe6);
  box-shadow: 
    0 6px 20px rgba(0, 0, 0, 0.25),
    0 2px 6px rgba(0, 0, 0, 0.12);
}

.newspaper-scroll-cue:hover .scroll-cue-arrow svg path {
  stroke: var(--paper-bg, #f4efe6);
}

.newspaper-scroll-cue.cue-hidden {
  opacity: 0 !important;
  visibility: hidden !important;
  pointer-events: none !important;
  transform: translate(-50%, 14px) !important;
}

.newspaper-scroll-cue .scroll-cue-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-red, #c33b27);
  box-shadow: 0 0 0 2px rgba(195, 59, 39, 0.2);
  display: inline-block;
  animation: scrollDotPulse 2s infinite ease-in-out;
}

@keyframes scrollDotPulse {
  0%, 100% {
    transform: scale(1);
    opacity: 1;
  }
  50% {
    transform: scale(1.3);
    opacity: 0.6;
  }
}

.newspaper-scroll-cue .scroll-cue-text {
  line-height: 1;
  white-space: nowrap;
}

.newspaper-scroll-cue .scroll-cue-arrow {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  animation: scrollCueBounce 1.8s infinite ease-in-out;
}

.newspaper-scroll-cue .scroll-cue-arrow svg {
  display: block;
}

@keyframes scrollCueBounce {
  0%, 20%, 50%, 80%, 100% {
    transform: translateY(0);
  }
  40% {
    transform: translateY(3.5px);
  }
  60% {
    transform: translateY(1.5px);
  }
}

@media (max-width: 480px) {
  .newspaper-scroll-cue {
    bottom: 16px;
    padding: 6px 13px;
    font-size: 10px;
    letter-spacing: 1.1px;
    gap: 6px;
  }
}

/* Device Breakpoints: Laptops, Tablets, and Phone Sub-Breakpoints */
@media (max-width: 1024px) {
  .newspaper-camera.zoomed-out {
    transform: translate3d(0, -12px, -150px) scale(0.82) rotateX(12deg) rotateY(-4deg);
  }
}

@media (max-width: 768px) {
  .newspaper-camera.zoomed-out {
    transform: translate3d(0, -10px, -120px) scale(0.76) rotateX(10deg) rotateY(-4deg);
  }

  /* Completely hide floating pager on mobile/tablets so it never covers editorial text or turn buttons */
  .newspaper-floating-pager {
    display: none !important;
  }
}

/* Sub-breakpoint: Modern Phones (390px - 480px) */
@media (max-width: 480px) {
  .newspaper-camera.zoomed-out {
    transform: translate3d(0, -8px, -90px) scale(0.70) rotateX(8deg) rotateY(-3deg);
  }
}

/* Sub-breakpoint: Compact Phones (360px - 389px) */
@media (max-width: 389px) {
  .newspaper-camera.zoomed-out {
    transform: translate3d(0, -6px, -70px) scale(0.66) rotateX(6deg) rotateY(-2deg);
  }
}

/* Sub-breakpoint: Ultra-Small & Fold Outer (<= 320px) */
@media (max-width: 320px) {
  .newspaper-camera.zoomed-out {
    transform: translate3d(0, -4px, -50px) scale(0.62) rotateX(4deg) rotateY(-2deg);
  }
}