/* ==========================================================================
   KanaGate Showcase - Segmented Scrollytelling Layout
   ========================================================================== */

/* --------------------------------------------------------------------------
   Minimal Navbar (Always Sticky)
   -------------------------------------------------------------------------- */
.minimal-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: var(--nav-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-subtle);
  z-index: 999;
  display: flex;
  align-items: center;
  transition: background 0.3s var(--ease-out), border-color 0.3s var(--ease-out);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.brand-identity {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.brand-icon {
  width: 32px;
  height: 32px;
  object-fit: contain;
  flex-shrink: 0;
}

/* Official SVG Logotype */
.brand-logotype-svg {
  height: 25px;
  width: auto;
  display: block;
}

.brand-logotype-svg.footer-logotype {
  height: 20px;
}

/* Theme-responsive logotype switching */
.brand-logotype-svg.brand-logotype-dark {
  display: block;
}
.brand-logotype-svg.brand-logotype-light {
  display: none;
}

[data-theme="light"] .brand-logotype-svg.brand-logotype-dark {
  display: none !important;
}
[data-theme="light"] .brand-logotype-svg.brand-logotype-light {
  display: block !important;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Theme Toggle Button */
.theme-toggle-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--bg-surface);
  border: 1px solid var(--border-medium);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s var(--ease-out);
  position: relative;
  outline: none;
}

.theme-toggle-btn:hover {
  border-color: var(--crimson-500);
  box-shadow: 0 0 16px var(--crimson-glow);
  transform: scale(1.05);
}

.theme-toggle-btn:active {
  transform: scale(0.95);
}

.theme-icon {
  position: absolute;
  transition: transform 0.3s var(--ease-spring), opacity 0.2s ease;
}

/* Dark mode: display Sun icon */
:root:not([data-theme="light"]) .sun-icon {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}

:root:not([data-theme="light"]) .moon-icon {
  opacity: 0;
  transform: rotate(90deg) scale(0.5);
}

/* Light mode: display Moon icon */
[data-theme="light"] .sun-icon {
  opacity: 0;
  transform: rotate(-90deg) scale(0.5);
}

[data-theme="light"] .moon-icon {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}

.nav-cta-link {
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 600;
  padding: 8px 18px;
  border-radius: 9999px;
  transition: all 0.2s var(--ease-out);
  cursor: pointer;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  line-height: 1.25;
}

/* 1. Default (Subtle Pill) Styling */
.nav-cta-link,
.nav-cta-link.nav-cta-default {
  color: var(--text-primary);
  background: var(--crimson-subtle);
  border: 1px solid rgba(225, 29, 72, 0.3);
}

.nav-cta-link.nav-cta-default:hover,
.nav-cta-link:not(.nav-cta-primary):hover {
  background: var(--crimson-500);
  border-color: var(--crimson-500);
  color: #ffffff;
  box-shadow: 0 0 20px var(--crimson-glow);
  transform: translateY(-1px);
}

.nav-cta-link.nav-cta-default:active,
.nav-cta-link:not(.nav-cta-primary):active {
  transform: translateY(0);
}

/* 2. Primary (Solid Primary Brand Background) Styling */
.nav-cta-link.nav-cta-primary {
  color: #ffffff;
  background: linear-gradient(135deg, var(--crimson-500) 0%, var(--crimson-600) 100%);
  border: 1px solid var(--crimson-500);
  box-shadow: 0 2px 14px var(--crimson-glow);
}

.nav-cta-link.nav-cta-primary:hover {
  background: linear-gradient(135deg, #f43f5e 0%, var(--crimson-500) 100%);
  border-color: #f43f5e;
  color: #ffffff;
  box-shadow: 0 4px 22px var(--crimson-glow);
  transform: translateY(-1px);
}

[data-theme="light"] .nav-cta-link.nav-cta-primary:hover {
  background: linear-gradient(135deg, #e11d48 0%, var(--crimson-500) 100%);
  border-color: #e11d48;
}

.nav-cta-link.nav-cta-primary:active {
  transform: translateY(0);
  box-shadow: 0 2px 8px var(--crimson-glow);
}

/* --------------------------------------------------------------------------
   Scrollytelling Layout Grid
   -------------------------------------------------------------------------- */
.scrolly-section {
  position: relative;
}

.scrolly-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 64px;
  align-items: flex-start;
  position: relative;
}

@media (max-width: 992px) {
  .scrolly-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

/* --------------------------------------------------------------------------
   Narrative Story Column (Left)
   -------------------------------------------------------------------------- */
.story-column {
  display: flex;
  flex-direction: column;
}

.story-segment {
  height: 100vh;
  height: 100dvh;
  min-height: 100vh;
  min-height: 100dvh;
  scroll-snap-align: start;
  scroll-snap-stop: normal;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 40px 0;
  position: relative;
  overflow: visible;
  /* The segment outer container is not transformed, keeping scroll-snap points completely invariant */
}

/* Narrative content micro-animation: subtle entrance fade and rise */
.story-segment> :not(.segment-motif-wrap) {
  position: relative;
  z-index: 1;
  opacity: 0.28;
  transform: translateY(16px);
  transition: opacity 0.45s var(--ease-out), transform 0.45s var(--ease-out);
}

.story-segment.active> :not(.segment-motif-wrap) {
  opacity: 1;
  transform: translateY(0);
}

.segment-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--crimson-500);
  margin-bottom: 20px;
}

.segment-label .chapter-num {
  color: var(--text-muted);
  font-family: var(--font-brand);
}

.segment-title {
  font-size: clamp(2.25rem, 4.5vw, 3.25rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 20px;
}

/* --------------------------------------------------------------------------
   Dynamic Premise Catchphrase Rotator
   -------------------------------------------------------------------------- */
.phrase-rotator {
  display: block;
  position: relative;
  height: 1.25em;
  overflow: hidden;
  white-space: nowrap;
  width: 100%;
}

.phrase-text {
  display: block;
  white-space: nowrap;
  line-height: 1.2;
  position: absolute;
  left: 0;
  top: 0;
  padding-bottom: 0.05em;
  will-change: transform, opacity, filter;
  transition: transform 0.55s cubic-bezier(0.16, 1, 0.3, 1),
    opacity 0.45s cubic-bezier(0.16, 1, 0.3, 1),
    filter 0.45s cubic-bezier(0.16, 1, 0.3, 1);
}

.phrase-text.current {
  position: relative;
  transform: translateY(0);
  opacity: 1;
  filter: blur(0);
}

.phrase-text.leaving {
  position: absolute;
  top: 0;
  left: 0;
  transform: translateY(-115%);
  opacity: 0;
  filter: blur(4px);
}

.phrase-text.entering-init {
  position: absolute;
  top: 0;
  left: 0;
  transform: translateY(115%);
  opacity: 0;
  filter: blur(4px);
}

.phrase-text.entering-active {
  position: absolute;
  top: 0;
  left: 0;
  transform: translateY(0);
  opacity: 1;
  filter: blur(0);
}



.segment-desc {
  font-size: 1.25rem;
  line-height: 1.65;
  color: var(--text-secondary);
  max-width: 520px;
  min-height: 80px;
  margin-bottom: 20px;
  transition: opacity 0.18s var(--ease-out), transform 0.18s var(--ease-out);
}

.segment-desc.switching {
  opacity: 0;
  transform: translateY(3px);
}

/* --------------------------------------------------------------------------
   Segment Meta Chips (Interactive & Optional 0-3 per segment)
   -------------------------------------------------------------------------- */
.segment-meta-chips {
  position: relative;
  z-index: 2;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 8px;
}

.meta-chip {
  position: relative;
  z-index: 2;
  appearance: none;
  background: var(--chip-bg);
  border: 1px solid var(--chip-border);
  border-radius: 9999px;
  padding: 7px 15px;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  cursor: pointer;
  user-select: none;
  font-family: inherit;
  transition: all 0.2s var(--ease-out);
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.08);
}

.meta-chip:hover {
  background: var(--bg-surface-elevated);
  border-color: var(--border-medium);
  color: var(--text-primary);
  transform: translateY(-1px);
}

.meta-chip:focus-visible {
  outline: 2px solid var(--crimson-500);
  outline-offset: 2px;
}

.meta-chip.active {
  background: var(--chip-active-bg, var(--bg-surface));
  border-color: var(--crimson-500);
  color: var(--crimson-500);
  box-shadow: 0 0 16px var(--crimson-glow);
}



/* --------------------------------------------------------------------------
   Sticky Device Stage (Right Column)
   -------------------------------------------------------------------------- */
.device-stage-column {
  position: sticky;
  top: var(--header-height);
  display: flex;
  justify-content: center;
  align-items: center;
  perspective: 1200px;
  height: calc(100vh - var(--header-height));
  height: calc(100dvh - var(--header-height));
  z-index: 50;
  pointer-events: none;
}

@media (max-width: 992px) {
  .device-stage-column {
    display: none;
  }
}

.phone-hardware {
  --phone-h: clamp(480px, calc(80vh - (var(--header-height) * 0.5)), 650px);
  height: var(--phone-h);
  aspect-ratio: 292 / 600;
  max-width: 100%;
  max-height: calc(100vh - var(--header-height) - 40px);
  background: var(--phone-frame-bg);
  border-radius: clamp(34px, calc(var(--phone-h) * 0.067), 44px);
  box-shadow:
    0 0 0 9px var(--phone-frame-ring-1),
    0 0 0 11px var(--phone-frame-ring-2),
    var(--phone-frame-shadow);
  position: relative;
  overflow: hidden;
  transform-style: preserve-3d;
  will-change: transform;
  transition: box-shadow 0.3s var(--ease-out), background-color 0.3s var(--ease-out);
}

/* Modern Android Punch-Hole Camera Cutout */
.phone-punch-hole,
.phone-island {
  position: absolute;
  top: 10px;
  left: 50%;
  transform: translateX(-50%);
  width: 12px;
  height: 12px;
  background: #000000;
  border-radius: 50%;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.45);
}

.punch-hole-lens,
.island-camera {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, #2a3d5e 0%, #0d121d 60%, #05070c 100%);
  box-shadow: inset 0 0 1px rgba(255, 255, 255, 0.35);
}

.screen-viewport {
  width: 100%;
  height: 100%;
  position: relative;
  background: var(--bg-canvas);
  overflow: hidden;
  transition: background-color 0.3s var(--ease-out);
}

.app-screenshot {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transform: scale(1.02);
  transition: opacity 0.45s var(--ease-out), transform 0.45s var(--ease-out);
  pointer-events: none;
}

.app-screenshot.active {
  opacity: 1;
  transform: scale(1);
  pointer-events: auto;
}

/* --------------------------------------------------------------------------
   Vertical Segment Progress Tracker (Interactive Dots)
   -------------------------------------------------------------------------- */
.segment-tracker {
  position: fixed;
  right: 28px;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  gap: 14px;
  z-index: 1000;
  pointer-events: auto;
}

@media (max-width: 1200px) {
  .segment-tracker {
    display: none;
  }
}

.tracker-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--tracker-bg);
  border: none;
  padding: 0;
  cursor: pointer;
  transition: all 0.25s var(--ease-out);
  position: relative;
  outline: none;
}

.tracker-dot:hover {
  background: var(--tracker-hover);
  transform: scale(1.3);
}

.tracker-dot.active {
  height: 28px;
  border-radius: 9999px;
  background: var(--crimson-500);
  box-shadow: 0 0 14px var(--crimson-glow);
}

/* Tooltip on dot hover */
.tracker-dot::after {
  content: attr(data-label);
  position: absolute;
  right: 22px;
  top: 50%;
  transform: translateY(-50%) translateX(10px);
  opacity: 0;
  pointer-events: none;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-medium);
  color: var(--text-primary);
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  white-space: nowrap;
  padding: 5px 12px;
  border-radius: 6px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.tracker-dot:hover::after {
  opacity: 1;
  transform: translateY(-50%) translateX(0);
}

/* --------------------------------------------------------------------------
   Floating Up & Down Navigation Arrows
   -------------------------------------------------------------------------- */
.floating-nav-arrows {
  position: fixed;
  right: 20px;
  bottom: 28px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  z-index: 1000;
}

.nav-arrow-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-medium);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
  transition: all 0.2s var(--ease-out);
  outline: none;
}

.nav-arrow-btn:hover:not(:disabled) {
  background: var(--crimson-500);
  border-color: var(--crimson-500);
  color: #ffffff;
  box-shadow: 0 0 20px var(--crimson-glow);
  transform: scale(1.08);
}

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

.nav-arrow-btn:disabled {
  opacity: 0.25;
  cursor: not-allowed;
  box-shadow: none;
}

/* --------------------------------------------------------------------------
   Subtle Traditional Japanese Motif Backgrounds (Negative Space Floor)
   Order: 1. Seigaiha (Waves) -> 2. Asanoha (Hemp Leaf) -> 3. Shippo (Seven Treasures)
   -------------------------------------------------------------------------- */
.waitlist-fullscreen-section {
  position: relative;
  overflow: hidden;
}

.waitlist-fullscreen-section> :not(.segment-motif-wrap) {
  position: relative;
  z-index: 1;
}

/* Base motif wrap container: anchored to the bottom with upward vertical fade */
.segment-motif-wrap {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 250px;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
  -webkit-mask-image: linear-gradient(to top, rgba(0, 0, 0, 1) 0%, rgba(0, 0, 0, 0.75) 45%, rgba(0, 0, 0, 0) 100%);
  mask-image: linear-gradient(to top, rgba(0, 0, 0, 1) 0%, rgba(0, 0, 0, 0.75) 45%, rgba(0, 0, 0, 0) 100%);
}

/* Widescreen leftward bleed: extend narrative motif across container padding & expanded left gutter */
.story-segment .segment-motif-wrap {
  left: -32px;
  right: 0;
}

@media (min-width: 1200px) {
  .story-segment .segment-motif-wrap {
    left: calc(-1 * ((100vw - var(--container-max)) / 2 + 32px));
    right: 0;
  }
}

.story-segment .segment-motif-wrap {
  -webkit-mask-image:
    linear-gradient(to top, rgba(0, 0, 0, 1) 0%, rgba(0, 0, 0, 0.75) 45%, rgba(0, 0, 0, 0) 100%),
    linear-gradient(to right, rgba(0, 0, 0, 1) 0%, rgba(0, 0, 0, 1) calc(100% - 40px), rgba(0, 0, 0, 0) 100%);
  mask-image:
    linear-gradient(to top, rgba(0, 0, 0, 1) 0%, rgba(0, 0, 0, 0.75) 45%, rgba(0, 0, 0, 0) 100%),
    linear-gradient(to right, rgba(0, 0, 0, 1) 0%, rgba(0, 0, 0, 1) calc(100% - 40px), rgba(0, 0, 0, 0) 100%);
  -webkit-mask-composite: source-in;
  mask-composite: intersect;
}

@media (max-width: 768px) {
  .segment-motif-wrap {
    height: 180px;
  }

  .story-segment .segment-motif-wrap {
    left: -20px;
    right: -20px;
    -webkit-mask-image: linear-gradient(to top, rgba(0, 0, 0, 1) 0%, rgba(0, 0, 0, 0.75) 45%, rgba(0, 0, 0, 0) 100%);
    mask-image: linear-gradient(to top, rgba(0, 0, 0, 1) 0%, rgba(0, 0, 0, 0.75) 45%, rgba(0, 0, 0, 0) 100%);
    -webkit-mask-composite: source-over;
    mask-composite: add;
  }
}

.segment-motif {
  width: 100%;
  height: 100%;
  background-color: var(--pattern-motif-color);
  -webkit-mask-repeat: repeat;
  mask-repeat: repeat;
  -webkit-mask-position: bottom left;
  mask-position: bottom left;
  transition: background-color 0.35s var(--ease-out), opacity 0.35s var(--ease-out);
}

/* 1. Seigaiha (100x60 tile) - Special case: 2 colors (foreground red/white, background white/black) */
.story-segment:nth-child(3n+1) .segment-motif,
.segment-motif.motif-seigaiha,
[data-motif="seigaiha"] .segment-motif {
  -webkit-mask-image: none !important;
  mask-image: none !important;
  background-color: transparent !important;
  background-image: var(--pattern-seigaiha-url, url('../../assets/Seigaiha-dark.svg'));
  background-repeat: repeat;
  background-position: bottom left;
  background-size: 100px 60px;
  opacity: var(--pattern-seigaiha-opacity, 0.35);
}

:root:not([data-theme="light"]) .segment-motif.motif-seigaiha,
:root:not([data-theme="light"]) [data-motif="seigaiha"] .segment-motif {
  background-image: url('../../assets/Seigaiha-dark.svg');
}

[data-theme="light"] .segment-motif.motif-seigaiha,
[data-theme="light"] [data-motif="seigaiha"] .segment-motif {
  background-image: url('../../assets/Seigaiha.svg');
}

/* 2. Asanoha (69.282x40 tile) */
.story-segment:nth-child(3n+2) .segment-motif,
.segment-motif.motif-asanoha,
[data-motif="asanoha"] .segment-motif {
  -webkit-mask-image: url('../../assets/Asanoha.svg');
  mask-image: url('../../assets/Asanoha.svg');
  -webkit-mask-size: 69.282px 40px;
  mask-size: 69.282px 40px;
  background-color: var(--pattern-motif-color);
  opacity: var(--pattern-asanoha-opacity, 0.18);
}

/* 3. Shippo (100x100 tile rendered at 80x80 for balanced scale) */
.story-segment:nth-child(3n) .segment-motif,
.segment-motif.motif-shippo,
[data-motif="shippo"] .segment-motif {
  -webkit-mask-image: url('../../assets/Shippo.svg');
  mask-image: url('../../assets/Shippo.svg');
  -webkit-mask-size: 60px 60px;
  mask-size: 60px 60px;
  background-color: var(--pattern-motif-color);
  opacity: var(--pattern-shippo-opacity, 0.18);
}