/* ==========================================================================
   Poster #105: True Parallax Scrollytelling Architecture
   10th Graz Brain-Computer Interface Conference 2026
   Apple Human Interface Guidelines (HIG) Principles
   ========================================================================== */

:root {
  /* Physical Poster Color Palette */
  --banner-bg: #F2E9DF;
  --banner-border: #DFD5C6;
  --banner-text: #22201C;

  --canvas-bg: #0F1012;
  --canvas-subtle: #F3EFE9;

  --card-bg: #FFFFFF;
  --card-tint: #EEF5F7;
  --card-tint-hover: #E3EFF2;
  --card-border: rgba(35, 33, 28, 0.1);
  --card-border-strong: rgba(35, 33, 28, 0.2);

  --text-primary: #1D1D1F;
  --text-secondary: #515459;
  --text-tertiary: #86868B;
  --text-light: #FFFFFF;

  --accent-primary: #2B6777;
  --accent-primary-hover: #225360;
  --accent-primary-light: #EBF4F6;

  --accent-secondary: #C66248;
  --accent-secondary-hover: #B0533B;
  --accent-secondary-light: #FCEEEB;

  --group-improved: #2E7D32;
  --group-improved-bg: #EDF7EE;
  --group-unchanged: #4A6372;
  --group-unchanged-bg: #EDF3F6;
  --group-worsened: #C62828;
  --group-worsened-bg: #FDEEEE;

  /* Elevation & Blur */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 6px 20px rgba(0, 0, 0, 0.12);
  --shadow-lg: 0 16px 44px rgba(0, 0, 0, 0.22);
  --shadow-modal: 0 28px 72px rgba(0, 0, 0, 0.36);

  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 22px;
  --radius-xl: 28px;
  --radius-pill: 9999px;

  /* Apple HIG Motion & Animation Curves */
  --ease-apple: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --duration-apple: 0.7s;
  --duration-fast: 0.22s;
  --transition: all var(--duration-fast) var(--ease-apple);
}

/* Base Reset & Typography */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  scroll-snap-type: y mandatory;
  background: var(--canvas-bg);
  overflow-x: hidden;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Helvetica Neue", "Plus Jakarta Sans", system-ui, sans-serif;
  background-color: var(--canvas-bg);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Outfit", system-ui, sans-serif;
  color: var(--text-primary);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.25;
}

a {
  color: var(--accent-primary);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--accent-primary-hover);
}

button {
  cursor: pointer;
  font-family: inherit;
  border: none;
  outline: none;
  background: none;
  transition: var(--transition);
}

button:active,
.jump-pill:active,
.btn-header-action:active,
.glossary-chip:active,
.btn-next-section-jump:active,
.result-figure-thumb:active,
.about-link-btn:active,
.landing-scroll-pill:active,
.btn-peek-poster:active {
  transform: scale(0.97) !important;
}

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

.container {
  width: 100%;
  max-width: min(100% - 32px, 1340px);
  margin: 0 auto;
}

/* ==========================================================================
   Apple Frosted-Glass Top Navigation Header
   ========================================================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 500;
  background: rgba(250, 248, 245, 0.88);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border-bottom: 1px solid var(--card-border);
}

.nav-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 12px;
}

.brand-wrapper {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.paper-number-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--banner-bg);
  border: 1px solid var(--banner-border);
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  font-size: 0.76rem;
  font-weight: 700;
  color: var(--banner-text);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  white-space: nowrap;
}

.brand-title {
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Header Section Jump Pills */
.nav-section-jumps {
  display: flex;
  align-items: center;
  gap: 4px;
  background: rgba(0, 0, 0, 0.04);
  padding: 3px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--card-border);
}

.jump-pill {
  min-height: 32px;
  padding: 0 11px;
  border-radius: var(--radius-pill);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.jump-pill:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.7);
}

.jump-pill.active {
  background: #FFFFFF;
  color: var(--banner-text);
  box-shadow: var(--shadow-sm);
  font-weight: 700;
}

/* Header Actions */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.btn-header-action {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 38px;
  padding: 0 14px;
  border-radius: var(--radius-pill);
  font-size: 0.82rem;
  font-weight: 600;
  border: 1px solid var(--card-border);
  background: #FFFFFF;
  color: var(--text-primary);
  box-shadow: var(--shadow-sm);
}

.btn-header-action:hover {
  border-color: var(--card-border-strong);
  transform: translateY(-1px);
}

.btn-header-action.primary {
  background: var(--accent-primary);
  color: #FFFFFF;
  border-color: var(--accent-primary);
}

.btn-header-action.primary:hover {
  background: var(--accent-primary-hover);
}

/* ==========================================================================
   FULLSCREEN POSTER BACKGROUND STAGE (HORIZONTAL FULL-BLEED)
   ========================================================================== */
#parallax-poster-stage {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
  background: radial-gradient(circle at 50% 25%, #222c33 0%, #161e23 50%, #0d1215 100%);
}

/* Ambient Full-Bleed Backdrop: Warm ambient atmosphere reflecting poster colors */
.ambient-poster-backdrop {
  position: absolute;
  inset: -40px;
  width: calc(100vw + 80px);
  height: calc(100vh + 80px);
  object-fit: cover;
  filter: blur(48px) brightness(0.70) saturate(135%);
  transform: scale(1.08);
  opacity: 0.60;
  user-select: none;
  -webkit-user-drag: none;
}

/* Fullscreen Poster Canvas: Fills horizontal screen width (width: 100%) */
#fullscreen-poster-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  aspect-ratio: 3312 / 4681;
  overflow: hidden;
  box-shadow: 0 20px 80px rgba(0, 0, 0, 0.7);
  transform: translateY(64px);
  transition: transform var(--duration-apple) var(--ease-apple);
  will-change: transform;
}

.poster-layer {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: fill;
  display: block;
  user-select: none;
  -webkit-user-drag: none;
}

/* Base Blurred Layer: All other sections remain softly blurred & dimmed */
.blur-layer {
  filter: blur(8px) brightness(0.60) saturate(115%);
  transform: scale(1.01);
}

/* Sharp Reveal Cutout: ONLY the active section is 100% sharp */
#poster-sharp-mask {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 2;
  transition: clip-path var(--duration-apple) var(--ease-apple);
  will-change: clip-path;
  clip-path: inset(10.68% 50.21% 71.40% 0.69% round 12px);
}

.sharp-layer {
  filter: brightness(1.03) contrast(1.02);
}

/* Animated Glowing Border around the active section */
#poster-highlight-frame {
  position: absolute;
  border: 2.5px solid var(--accent-secondary);
  box-shadow: 0 0 24px rgba(198, 98, 72, 0.85), inset 0 0 14px rgba(198, 98, 72, 0.25);
  border-radius: 8px;
  pointer-events: auto;
  cursor: pointer;
  z-index: 3;
  opacity: 0;
  transition: opacity 0.4s ease,
              top var(--duration-apple) var(--ease-apple),
              left var(--duration-apple) var(--ease-apple),
              width var(--duration-apple) var(--ease-apple),
              height var(--duration-apple) var(--ease-apple);
  animation: pulseHighlight 2.5s infinite;
  box-sizing: border-box;
}

.frame-know-more-badge {
  position: absolute;
  bottom: 12px;
  right: 14px;
  background: rgba(198, 98, 72, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  color: #FFFFFF;
  border: 1px solid rgba(255, 255, 255, 0.7);
  font-size: 0.76rem;
  font-weight: 700;
  padding: 5px 12px;
  border-radius: var(--radius-pill);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.35);
  cursor: pointer;
  pointer-events: auto;
  transition: transform 0.2s var(--ease-apple), background 0.2s ease, box-shadow 0.2s ease;
  user-select: none;
}

.frame-know-more-badge:hover {
  background: var(--accent-secondary);
  transform: scale(1.06);
  box-shadow: 0 6px 20px rgba(198, 98, 72, 0.6);
}

@keyframes pulseHighlight {
  0% { border-color: rgba(198, 98, 72, 0.85); box-shadow: 0 0 14px rgba(198, 98, 72, 0.6); }
  50% { border-color: rgba(198, 98, 72, 1); box-shadow: 0 0 28px rgba(198, 98, 72, 0.95); }
  100% { border-color: rgba(198, 98, 72, 0.85); box-shadow: 0 0 14px rgba(198, 98, 72, 0.6); }
}

/* ==========================================================================
   FLOATING APPLE STEPPER CAPSULE (Vertical on Desktop)
   ========================================================================== */
.floating-stepper-capsule {
  position: fixed;
  right: 24px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 200;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  background: rgba(250, 248, 245, 0.88);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border: 1px solid var(--card-border);
  padding: 10px 7px;
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-md);
}

.stepper-pill-dot {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  min-width: 32px;
  border-radius: 50%;
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid transparent;
  background: transparent;
}

.stepper-pill-dot .dot-circle {
  width: 26px;
  height: 26px;
  min-width: 26px;
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.72rem;
  font-weight: 800;
  color: var(--text-secondary);
  transition: var(--transition);
}

.stepper-pill-dot .dot-label {
  position: absolute;
  right: calc(100% + 12px);
  top: 50%;
  transform: translateY(-50%) translateX(6px);
  background: rgba(250, 248, 245, 0.94);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow-md);
  padding: 5px 12px;
  border-radius: var(--radius-pill);
  font-size: 0.76rem;
  font-weight: 700;
  color: var(--banner-text);
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.2s var(--ease-apple), transform 0.2s var(--ease-apple);
  z-index: 250;
}

.stepper-pill-dot:hover .dot-label {
  opacity: 1;
  transform: translateY(-50%) translateX(0);
}

.stepper-pill-dot:hover .dot-circle {
  background: rgba(0, 0, 0, 0.12);
  color: var(--accent-primary);
  transform: scale(1.1);
}

.stepper-pill-dot.active .dot-circle {
  background: var(--accent-secondary);
  color: #FFFFFF;
  box-shadow: 0 2px 8px rgba(198, 98, 72, 0.4);
}

.stepper-pill-dot.active {
  background: rgba(255, 255, 255, 0.85);
  border-color: var(--banner-border);
}

/* ==========================================================================
   FLOATING SECTION CAPSULE (Bottom Docked Apple Controller)
   ========================================================================== */
.floating-section-capsule {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 150;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: auto;
  min-width: 320px;
  max-width: 440px;
  background: rgba(247, 245, 238, 0.96);
  backdrop-filter: blur(28px) saturate(190%);
  -webkit-backdrop-filter: blur(28px) saturate(190%);
  border: 1.5px solid #DCD5C9;
  box-shadow: 0 16px 44px rgba(0, 0, 0, 0.22), 0 1px 0 rgba(255, 255, 255, 0.8) inset;
  padding: 6px 12px;
  border-radius: var(--radius-pill);
  transition: opacity 0.35s var(--ease-apple), transform 0.35s var(--ease-apple), visibility 0.35s;
  user-select: none;
}

.floating-section-capsule.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translate(-50%, 24px);
}

.capsule-nav-btn {
  width: 32px;
  height: 32px;
  min-width: 32px;
  border-radius: 50%;
  background: rgba(43, 103, 119, 0.08);
  border: 1px solid rgba(220, 213, 201, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-primary);
  cursor: pointer;
  transition: background 0.2s ease, transform 0.2s ease, opacity 0.2s ease;
  flex-shrink: 0;
}

.capsule-nav-btn:hover:not(:disabled) {
  background: rgba(43, 103, 119, 0.16);
  color: #1F4E5B;
  transform: scale(1.08);
}

.capsule-nav-btn:active:not(:disabled) {
  transform: scale(0.94);
}

.capsule-nav-btn:disabled {
  opacity: 0.25;
  cursor: not-allowed;
  pointer-events: none;
}

.capsule-info-group {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  cursor: pointer;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  transition: background 0.2s ease, opacity 0.2s ease;
  text-align: center;
}

.capsule-info-group:hover {
  background: rgba(43, 103, 119, 0.06);
}

.capsule-step-badge {
  width: 24px;
  height: 24px;
  min-width: 24px;
  border-radius: 50%;
  background: var(--accent-secondary);
  color: #FFFFFF;
  font-size: 0.76rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 6px rgba(198, 98, 72, 0.35);
  flex-shrink: 0;
}

.capsule-text-group {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  line-height: 1.25;
  text-align: center;
}

.capsule-title {
  font-size: 0.86rem;
  font-weight: 700;
  color: #1A2228;
  white-space: nowrap;
  text-align: center;
}

.capsule-subtitle {
  font-size: 0.68rem;
  font-weight: 600;
  color: #515459;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  white-space: nowrap;
  text-align: center;
}

/* ==========================================================================
   FOREGROUND SCROLL TRACK & FLOATING EXPLANATION GLASS CARDS
   ========================================================================== */
#parallax-scroll-track {
  position: relative;
  z-index: 10;
  width: 100%;
  pointer-events: none;
}

.section-scroll-stage {
  min-height: 100vh;
  height: 100vh;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  box-sizing: border-box;
  scroll-snap-align: start;
  scroll-snap-stop: always;
  position: relative;
  pointer-events: none;
}

/* ==========================================================================
   Landing Stage & Interactive Scroll Prompt
   ========================================================================== */
.stage-overview-landing {
  min-height: 100vh;
  min-height: 100dvh;
  height: 100dvh;
  display: flex !important;
  flex-direction: column !important;
  justify-content: flex-end !important;
  align-items: center !important;
  padding: 0 16px max(14px, env(safe-area-inset-bottom, 14px)) 16px !important;
  box-sizing: border-box;
  pointer-events: none;
  position: relative;
}

/* ==========================================================================
   LANDING COMPANION DECK: Fills bottom gap with poster colors & guided navigation
   ========================================================================== */
.landing-companion-deck {
  width: 100%;
  max-width: 560px;
  background: rgba(247, 245, 238, 0.96);
  backdrop-filter: blur(28px) saturate(190%);
  -webkit-backdrop-filter: blur(28px) saturate(190%);
  border: 1.5px solid #DCD5C9;
  border-radius: 20px;
  box-shadow: 0 16px 44px rgba(0, 0, 0, 0.22), 0 1px 0 rgba(255, 255, 255, 0.8) inset;
  padding: 10px 14px 10px 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: auto;
  user-select: none;
  animation: deckAppear 0.5s cubic-bezier(0.16, 1, 0.3, 1);
  transition: transform 0.3s ease, opacity 0.3s ease;
}

@keyframes deckAppear {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

.deck-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.deck-title-group {
  display: flex;
  align-items: center;
  gap: 9px;
  min-width: 0;
}

.deck-pulse-indicator {
  width: 9px;
  height: 9px;
  min-width: 9px;
  border-radius: 50%;
  background: var(--accent-secondary);
  box-shadow: 0 0 8px var(--accent-secondary);
  animation: pulseDot 2s infinite;
}

@keyframes pulseDot {
  0% { transform: scale(0.9); opacity: 0.8; }
  50% { transform: scale(1.3); opacity: 1; box-shadow: 0 0 12px var(--accent-secondary); }
  100% { transform: scale(0.9); opacity: 0.8; }
}

.deck-labels {
  display: flex;
  flex-direction: column;
  line-height: 1.25;
  min-width: 0;
}

.deck-badge {
  font-size: 0.68rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent-secondary);
}

.deck-headline {
  font-size: 0.82rem;
  font-weight: 700;
  color: #1A2228;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.btn-deck-scroll,
.btn-deck-start {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--accent-primary);
  color: #FFFFFF;
  font-size: 0.80rem;
  font-weight: 700;
  padding: 7px 15px;
  border-radius: var(--radius-pill);
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(43, 103, 119, 0.35);
  transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1), background 0.2s ease, box-shadow 0.2s ease;
  white-space: nowrap;
  flex-shrink: 0;
}

.btn-deck-scroll:hover,
.btn-deck-start:hover {
  background: #1F4E5B;
  transform: translateY(-1px) scale(1.02);
  box-shadow: 0 6px 18px rgba(43, 103, 119, 0.45);
}

.btn-deck-scroll:active,
.btn-deck-start:active {
  transform: scale(0.96);
}

.btn-deck-scroll svg,
.btn-deck-start svg {
  animation: bounceDown 1.8s infinite;
}

@keyframes bounceDown {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(3px); }
}

.deck-chips-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  padding: 2px 0 2px 0;
  scrollbar-width: none;
}

.deck-chips-bar::-webkit-scrollbar {
  display: none;
}

.deck-chip {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: #FAF8F4;
  border: 1px solid #DCD5C9;
  padding: 3px 9px 3px 4px;
  border-radius: var(--radius-pill);
  font-size: 0.74rem;
  font-weight: 700;
  color: #1A2228;
  cursor: pointer;
  white-space: nowrap;
  transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
  flex-shrink: 0;
}

.deck-chip:hover {
  border-color: var(--accent-primary);
  background: #FFFFFF;
  transform: translateY(-1px);
}

.deck-chip:active {
  transform: scale(0.95);
}

.deck-chip-num {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  color: #FFFFFF;
  font-size: 0.68rem;
  font-weight: 800;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.deck-chip-num.teal {
  background: var(--accent-primary);
}

.deck-chip-num.coral {
  background: var(--accent-secondary);
}

.deck-chip-num.sage {
  background: #52AB98;
}

.deck-chip.author-chip {
  background: rgba(198, 98, 72, 0.08);
  border-color: rgba(198, 98, 72, 0.35);
  color: var(--accent-secondary);
  padding: 3px 10px;
}

.deck-chip.author-chip:hover {
  background: rgba(198, 98, 72, 0.16);
  border-color: var(--accent-secondary);
}

/* Floating Apple Frosted Glass Card */
.floating-glass-card {
  width: 100%;
  max-width: min(540px, 42vw);
  max-height: min(84vh, calc(100vh - 110px));
  overflow-y: auto;
  overscroll-behavior: contain;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(28px) saturate(190%);
  -webkit-backdrop-filter: blur(28px) saturate(190%);
  border: 1px solid rgba(255, 255, 255, 0.85);
  border-radius: var(--radius-xl);
  padding: clamp(20px, 3vw, 32px);
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.28), 0 0 0 1px rgba(255, 255, 255, 0.5);
  color: var(--text-primary);
  opacity: 0.15;
  transform: translateY(28px) scale(0.96);
  transition: opacity var(--duration-apple) var(--ease-apple), transform var(--duration-apple) var(--ease-apple);
  pointer-events: auto;
}

.floating-glass-card.wide-card {
  max-width: min(720px, 62vw);
}

/* Apple Sleek Scrollbar */
.floating-glass-card::-webkit-scrollbar {
  width: 5px;
}
.floating-glass-card::-webkit-scrollbar-track {
  background: transparent;
}
.floating-glass-card::-webkit-scrollbar-thumb {
  background: rgba(0, 0, 0, 0.15);
  border-radius: var(--radius-pill);
}
.floating-glass-card::-webkit-scrollbar-thumb:hover {
  background: rgba(0, 0, 0, 0.28);
}

.section-scroll-stage.active .floating-glass-card {
  opacity: 1;
  transform: translateY(0) scale(1);
}

/* Minimized / Peek at Poster State */
.floating-glass-card.card-minimized {
  opacity: 0.12 !important;
  transform: translateY(22px) scale(0.95) !important;
  cursor: pointer;
}

.floating-glass-card.card-minimized:hover {
  opacity: 0.40 !important;
}

.card-header-line {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.card-header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.btn-peek-poster {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 9px;
  border-radius: var(--radius-pill);
  background: rgba(0, 0, 0, 0.04);
  border: 1px solid var(--card-border);
  color: var(--text-secondary);
  font-size: 0.74rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.btn-peek-poster:hover {
  background: rgba(0, 0, 0, 0.08);
  color: var(--text-primary);
  border-color: var(--card-border-strong);
}

.btn-peek-poster.active {
  background: var(--accent-primary);
  color: #FFFFFF;
  border-color: var(--accent-primary);
}

.section-badge-group {
  display: flex;
  align-items: center;
  gap: 10px;
}

.section-number-disc {
  width: 38px;
  height: 38px;
  min-width: 38px;
  border-radius: 50%;
  background: var(--banner-bg);
  border: 1.5px solid var(--banner-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--banner-text);
  box-shadow: var(--shadow-sm);
}

.section-tag-pill {
  font-size: 0.74rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 3px 9px;
  border-radius: var(--radius-pill);
  background: var(--card-tint);
  color: var(--accent-primary);
}

.section-title-text {
  font-size: clamp(1.3rem, 2.5vw, 1.6rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 14px;
}

.narrative-lead-paragraph {
  font-size: 1.02rem;
  line-height: 1.65;
  color: var(--text-primary);
  margin-bottom: 18px;
}

.narrative-body-text {
  font-size: 0.94rem;
  line-height: 1.65;
  color: var(--text-secondary);
  margin-bottom: 18px;
}

/* ==========================================================================
   Clickable Interactive Glossary Chips
   ========================================================================== */
.glossary-chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: var(--card-tint);
  border: 1px solid rgba(43, 103, 119, 0.22);
  color: var(--accent-primary);
  padding: 2px 9px;
  border-radius: var(--radius-pill);
  font-size: 0.84rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  margin: 1px 2px;
  white-space: nowrap;
}

.glossary-chip:hover {
  background: var(--accent-primary);
  color: #FFFFFF;
  border-color: var(--accent-primary);
  transform: translateY(-1px);
  box-shadow: 0 2px 8px rgba(43, 103, 119, 0.2);
}

.glossary-chip::after {
  content: "ⓘ";
  font-size: 0.72rem;
  opacity: 0.8;
}

/* Sub-Cards Inside Explanation Sections */
.subcard-box {
  background: rgba(243, 239, 233, 0.7);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: 20px;
  margin: 18px 0;
}

.subcard-box.tinted {
  background: rgba(238, 245, 247, 0.8);
  border-color: rgba(43, 103, 119, 0.18);
}

.subcard-box h4 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.intro-headline-banner {
  background: rgba(43, 103, 119, 0.08);
  border-left: 4px solid var(--accent-primary);
  padding: 10px 16px;
  border-radius: 4px 12px 12px 4px;
  margin-bottom: 16px;
}

.intro-section-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--accent-primary);
  margin: 0;
}

.subcard-title {
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}

/* Inline figure card in Introduction & Explanations */
.intro-figure-card {
  margin-top: 14px;
  background: #FFFFFF;
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 12px;
  text-align: center;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
  user-select: none;
}

.intro-figure-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 14px rgba(43, 103, 119, 0.12);
  border-color: rgba(43, 103, 119, 0.35);
}

.intro-figure-card img {
  max-width: 100%;
  height: auto;
  max-height: 230px;
  object-fit: contain;
  border-radius: var(--radius-sm);
  display: block;
  margin: 0 auto;
}

.intro-figure-card .intro-figure-caption {
  font-size: 0.80rem;
  color: var(--text-secondary);
  margin-top: 8px;
  line-height: 1.45;
  text-align: left;
}

.clean-bullet-list {
  padding-left: 20px;
  margin: 6px 0 10px 0;
  line-height: 1.6;
  font-size: 0.92rem;
  color: var(--text-secondary);
}

.clean-bullet-list li {
  margin-bottom: 4px;
}

.clean-bullet-list strong {
  color: var(--text-primary);
}

.metrics-summary-table-wrapper {
  overflow-x: auto;
  margin: 14px 0 16px 0;
  border-radius: var(--radius-sm);
  border: 1px solid var(--card-border);
  background: #FFFFFF;
}

.metrics-summary-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
  text-align: left;
}

.metrics-summary-table th {
  background: rgba(43, 103, 119, 0.08);
  color: var(--accent-primary);
  font-weight: 700;
  padding: 10px 14px;
  border-bottom: 1px solid var(--card-border);
}

.metrics-summary-table td {
  padding: 10px 14px;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  color: var(--text-secondary);
}

.metrics-summary-table tr:last-child td {
  border-bottom: none;
}

.metrics-summary-table td strong {
  color: var(--text-primary);
}

.takeaway-callout-quote {
  margin: 14px 0 0 0;
  padding: 10px 14px;
  border-left: 3px solid var(--accent-secondary);
  background: rgba(198, 98, 72, 0.08);
  border-radius: 0 10px 10px 0;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--accent-secondary);
  line-height: 1.5;
}

.aim-objectives-list {
  list-style: none;
  padding: 0;
  margin: 6px 0 0 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.aim-objectives-list li {
  position: relative;
  padding-left: 18px;
  font-size: 0.90rem;
  line-height: 1.55;
  color: var(--text-secondary);
}

.aim-objectives-list li::before {
  content: "•";
  position: absolute;
  left: 3px;
  top: -1px;
  color: var(--accent-primary);
  font-size: 1.15rem;
  line-height: 1.2;
}

.aim-objectives-list li strong {
  color: var(--text-primary);
  display: inline;
  margin-right: 4px;
}

/* Interactive Methodology Pipeline Accordion */
.method-pipeline-accordion {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin: 16px 0;
}

.method-accordion-item {
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.95);
  overflow: hidden;
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

.method-accordion-item[open] {
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.06);
  border-color: rgba(43, 103, 119, 0.3);
}

.method-accordion-header {
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: rgba(247, 245, 238, 0.85);
  cursor: pointer;
  user-select: none;
  transition: background 0.2s ease;
}

.method-accordion-header::-webkit-details-marker {
  display: none;
}

.method-accordion-header:hover {
  background: rgba(243, 239, 233, 0.95);
}

.accordion-title-group {
  display: flex;
  align-items: center;
  gap: 10px;
}

.stage-step-pill {
  font-size: 0.70rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 3px 8px;
  border-radius: var(--radius-pill);
  background: var(--accent-primary);
  color: #FFFFFF;
}

.accordion-heading {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
}

.accordion-chevron {
  color: var(--text-secondary);
  transition: transform 0.25s var(--ease-apple);
}

.method-accordion-item[open] .accordion-chevron {
  transform: rotate(180deg);
}

.method-accordion-body {
  padding: 16px;
  border-top: 1px solid rgba(0, 0, 0, 0.06);
  background: rgba(255, 255, 255, 0.95);
}

.method-spec-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 10px;
  margin-bottom: 8px;
}

.spec-item {
  display: flex;
  flex-direction: column;
  background: rgba(247, 245, 238, 0.6);
  border: 1px solid rgba(0, 0, 0, 0.05);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
}

.spec-label {
  font-size: 0.70rem;
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 2px;
}

.spec-value {
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--text-primary);
}

.numbered-pipeline-list {
  padding-left: 20px;
  margin: 8px 0;
  font-size: 0.86rem;
  line-height: 1.6;
  color: var(--text-secondary);
}

.numbered-pipeline-list li {
  margin-bottom: 4px;
}

.numbered-pipeline-list strong {
  color: var(--text-primary);
}

.cohort-badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  font-size: 0.78rem;
  font-weight: 600;
}

.cohort-badge.improved {
  background: rgba(46, 125, 50, 0.12);
  color: #2E7D32;
  border: 1px solid rgba(46, 125, 50, 0.25);
}

.cohort-badge.unchanged {
  background: rgba(74, 99, 114, 0.12);
  color: #37474F;
  border: 1px solid rgba(74, 99, 114, 0.25);
}

.cohort-badge.worsened {
  background: rgba(198, 40, 40, 0.12);
  color: #C62828;
  border: 1px solid rgba(198, 40, 40, 0.25);
}

.subcard-grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 12px;
  margin-top: 12px;
}

.mini-metric-pill-card {
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 14px;
  box-shadow: var(--shadow-sm);
}

.mini-metric-pill-card h5 {
  font-size: 0.9rem;
  color: var(--accent-primary);
  margin-bottom: 4px;
}

.mini-metric-pill-card p {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.45;
}

/* Results Figure Strip */
.results-preview-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 10px;
  margin: 16px 0;
}

.result-figure-thumb {
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-sm);
  padding: 8px;
  cursor: pointer;
  text-align: center;
  transition: var(--transition);
}

.result-figure-thumb:hover {
  border-color: var(--accent-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.result-figure-thumb img {
  height: 64px;
  width: 100%;
  object-fit: contain;
  margin-bottom: 6px;
}

.result-figure-thumb span {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text-primary);
  display: block;
}

/* Next Section Jump Button */
.btn-next-section-jump {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  align-self: flex-start;
  margin-top: 20px;
  padding: 10px 18px;
  background: rgba(243, 239, 233, 0.85);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-pill);
  font-size: 0.84rem;
  font-weight: 700;
  color: var(--accent-primary);
  transition: var(--transition);
  cursor: pointer;
}

.btn-next-section-jump:hover {
  background: var(--card-tint);
  border-color: var(--accent-primary);
  transform: translateY(-2px);
}

/* ==========================================================================
   MODAL DIALOGS & SHEETS (Apple HIG Sheet Experience)
   ========================================================================== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(18, 20, 24, 0.65);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: clamp(16px, 4vw, 32px);
}

.modal-overlay.active {
  display: flex;
  animation: modalFadeIn 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes modalFadeIn {
  from { opacity: 0; transform: scale(0.96) translateY(12px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-window {
  background: #FFFFFF;
  border: 1px solid var(--card-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-modal);
  width: 100%;
  max-width: 680px;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  position: relative;
}

.modal-window.wide {
  max-width: 900px;
}

/* ==========================================================================
   SECTION DETAIL MODAL SHEET (Apple HIG Sheet Style)
   ========================================================================== */
.section-detail-sheet-window {
  max-width: 680px;
  width: 90%;
  max-height: 84vh;
  border-radius: 24px;
  box-shadow: 0 28px 80px rgba(0, 0, 0, 0.42), 0 0 0 1px rgba(0, 0, 0, 0.06);
  position: relative;
  display: flex;
  flex-direction: column;
}

.sheet-drag-handle {
  display: none;
  width: 38px;
  height: 5px;
  border-radius: 3px;
  background: rgba(0, 0, 0, 0.18);
  margin: 10px auto 4px auto;
}

.section-number-disc {
  width: 34px;
  height: 34px;
  min-width: 34px;
  border-radius: 50%;
  background: var(--accent-secondary);
  color: #FFFFFF;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.95rem;
  box-shadow: 0 2px 8px rgba(198, 98, 72, 0.4);
}

.modal-header-bar {
  background: var(--banner-bg);
  border-bottom: 1px solid var(--banner-border);
  padding: 16px 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-shrink: 0;
}

.modal-title-group {
  display: flex;
  align-items: center;
  gap: 10px;
}

.modal-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--banner-text);
}

.modal-category-tag {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.8);
  color: var(--accent-primary);
}

.btn-modal-close {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  color: var(--text-secondary);
}

.btn-modal-close:hover {
  background: rgba(0, 0, 0, 0.12);
  color: var(--text-primary);
}

.modal-scroll-body {
  padding: 24px;
  overflow-y: auto;
  flex-grow: 1;
}

/* Glossary Pop-up Specific Styling */
.term-diagram-container {
  background: #FAF8F5;
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: 14px;
  margin: 16px 0;
  text-align: center;
}

.term-diagram-container img {
  max-height: 280px;
  margin: 0 auto 10px auto;
  border-radius: var(--radius-sm);
  object-fit: contain;
}

.term-diagram-caption {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.45;
}

.term-math-box {
  background: var(--canvas-subtle);
  border-left: 3.5px solid var(--accent-primary);
  padding: 14px 18px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 1.02rem;
  margin: 16px 0;
  overflow-x: auto;
  text-align: center;
}

.term-math-box .katex-display {
  margin: 0.35em 0;
}

.term-significance-box {
  background: var(--card-tint);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  font-size: 0.88rem;
  color: var(--text-primary);
  line-height: 1.5;
  margin-top: 14px;
}

/* Question Portal Messenger Styling */
.messenger-panel-box {
  display: flex;
  flex-direction: column;
  min-height: 480px;
  height: 540px;
}

.msg-stream-area {
  flex-grow: 1;
  padding: 16px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
  background: #FAF9F6;
  border-radius: var(--radius-md);
  margin-bottom: 14px;
}

.msg-bubble-item {
  max-width: 84%;
  padding: 10px 14px;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  line-height: 1.45;
}

.msg-bubble-item.attendee {
  align-self: flex-end;
  background: var(--accent-primary);
  color: #fff;
  border-bottom-right-radius: 4px;
}

.msg-bubble-item.author {
  align-self: flex-start;
  background: #fff;
  border: 1px solid var(--card-border);
  color: var(--text-primary);
  border-bottom-left-radius: 4px;
}

.msg-sender-title {
  font-size: 0.7rem;
  font-weight: 700;
  margin-bottom: 2px;
}

.msg-bubble-item.author .msg-sender-title {
  color: var(--accent-primary);
}

.composer-row {
  display: flex;
  gap: 8px;
}

.composer-text-input {
  flex-grow: 1;
  min-height: 44px;
  padding: 0 16px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--card-border);
  background: var(--canvas-subtle);
  font-size: 0.92rem;
  outline: none;
}

.composer-text-input:focus {
  border-color: var(--accent-primary);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(43, 103, 119, 0.12);
}

.btn-send-round {
  width: 44px;
  height: 44px;
  min-width: 44px;
  border-radius: 50%;
  background: var(--accent-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
}

.author-admin-drawer {
  background: var(--banner-bg);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* About Modal Styling */
.about-profiles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.about-card {
  background: #FFFFFF;
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: 22px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
}

.about-card-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.avatar-disc {
  width: 52px;
  height: 52px;
  min-width: 52px;
  border-radius: var(--radius-md);
  background: var(--banner-bg);
  border: 1.5px solid var(--banner-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.15rem;
  color: var(--accent-primary);
}

.avatar-disc.pi {
  background: var(--card-tint);
  color: var(--accent-secondary);
}

.about-name {
  font-size: 1.15rem;
  font-weight: 700;
}

.about-role {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent-primary);
}

.about-affil {
  font-size: 0.78rem;
  color: var(--text-tertiary);
}

.about-bio {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.55;
  margin-bottom: 16px;
  flex-grow: 1;
}

.about-link-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 40px;
  padding: 0 16px;
  border-radius: var(--radius-pill);
  background: var(--accent-primary);
  color: #fff;
  font-size: 0.82rem;
  font-weight: 700;
  margin-top: auto;
}

.about-link-btn.pi-btn {
  background: var(--accent-secondary);
}

.about-link-btn:hover {
  transform: translateY(-1px);
}

/* ==========================================================================
   RESPONSIVE BREAKPOINTS (Mobile First & Touch Targets)
   ========================================================================== */
@media (max-width: 1200px) {
  .jump-pill {
    padding: 0 8px;
    font-size: 0.74rem;
  }
  .btn-header-action {
    padding: 0 10px;
    font-size: 0.78rem;
  }
}

@media (max-width: 1080px) {
  .brand-title {
    display: none;
  }
}

@media (max-width: 1024px) {
  .floating-stepper-capsule {
    display: none;
  }
}

@media (max-width: 960px) {
  html {
    scroll-snap-type: y mandatory; /* Smooth section snapping on mobile */
  }

  .section-scroll-stage {
    min-height: 100vh;
    height: 100vh;
    padding: 0;
    justify-content: center !important;
  }

  .stage-overview-landing {
    align-items: flex-end !important;
    padding-bottom: 28px !important;
  }

  .nav-section-jumps {
    display: none;
  }
}

@media (max-width: 768px) {
  .site-header .btn-header-action span {
    display: none;
  }

  .btn-header-action {
    padding: 0 10px;
    min-height: 34px;
  }

  .subcard-grid-3 {
    grid-template-columns: 1fr;
  }

  /* Landing companion deck mobile optimization */
  .stage-overview-landing {
    min-height: 100vh;
    min-height: 100dvh;
    height: 100dvh;
    align-items: center !important;
    justify-content: flex-end !important;
    padding: 0 12px max(12px, env(safe-area-inset-bottom, 12px)) 12px !important;
  }

  .landing-companion-deck {
    max-width: 100%;
    padding: 8px 12px 8px 12px;
    gap: 7px;
    border-radius: 16px;
  }

  .deck-headline {
    font-size: 0.76rem;
  }

  .btn-deck-start {
    padding: 6px 12px;
    font-size: 0.78rem;
  }

  .deck-chip {
    padding: 3px 8px 3px 4px;
    font-size: 0.70rem;
  }

  /* Modal Bottom Sheet on Mobile */
  #section-detail-modal {
    align-items: flex-end;
    padding: 0;
  }

  #section-detail-modal .section-detail-sheet-window {
    width: 100%;
    max-width: 100%;
    max-height: 86vh;
    border-radius: 24px 24px 0 0;
    margin: 0;
    box-shadow: 0 -10px 40px rgba(0, 0, 0, 0.35);
    animation: slideUpBottom 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  }

  .sheet-drag-handle {
    display: block;
  }

  /* Mobile Bottom Docked Capsule */
  .floating-section-capsule {
    bottom: 16px;
    width: calc(100% - 24px);
    max-width: 420px;
    gap: 8px;
    padding: 6px 10px;
    justify-content: space-between;
  }

  .capsule-info-group {
    flex: 1;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 2px 4px;
  }

  .capsule-text-group {
    align-items: center;
    text-align: center;
  }

  .capsule-title {
    font-size: 0.82rem;
    text-align: center;
  }

  .capsule-subtitle {
    display: none; /* Keep capsule clean and compact on phones */
  }

  .modal-window {
    max-height: 94vh;
    border-radius: var(--radius-lg);
  }
}

@keyframes slideUpBottom {
  from {
    transform: translateY(100%);
  }
  to {
    transform: translateY(0);
  }
}

/* Laptop and compact vertical viewports (1366x768, 1440x900, 1280x800) */
@media (max-height: 800px) and (min-width: 961px) {
  .section-scroll-stage {
    padding-top: 70px;
    padding-bottom: 20px;
  }

  .floating-glass-card {
    max-height: calc(100vh - 86px);
    padding: 16px 22px;
  }

  .section-title-text {
    font-size: 1.25rem;
    margin-bottom: 8px;
  }

  .narrative-lead-paragraph {
    font-size: 0.94rem;
    margin-bottom: 10px;
  }

  .subcard-box {
    padding: 12px 16px;
    margin: 10px 0;
  }

  .btn-next-section-jump {
    margin-top: 12px;
    padding: 7px 14px;
    font-size: 0.78rem;
  }
}