/* KanaFlip — sub-route landing (extends ../styles.css tokens) */

body.kanaflip-page {
  overflow-x: hidden;
  overflow-y: auto;
  min-height: 100dvh;
  height: auto;
  display: block;
}

.kanaflip {
  /* Align with app UI: violet / purple accent */
  --kanaflip-hue: 258;
  --kanaflip-accent: hsl(var(--kanaflip-hue) 55% 68%);
  --kanaflip-accent-dim: hsla(var(--kanaflip-hue) 40% 50% / 0.12);
  --kanaflip-surface: hsl(220 12% 9%);

  min-height: 100dvh;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
  isolation: isolate;
}

/* Single-screen layout on desktop: no page scroll */
@media (min-width: 901px) {
  /* This sheet is only loaded on /kanaflip/ */
  html {
    height: 100%;
    overflow: hidden;
  }

  body.kanaflip-page {
    height: 100dvh;
    max-height: 100dvh;
    overflow-x: hidden;
    overflow-y: hidden;
    overscroll-behavior: none;
  }

  .kanaflip {
    height: 100%;
    max-height: 100dvh;
    min-height: 0;
    overflow: hidden;
  }
}

/* Tighter rhythm on short desktop windows so nothing clips */
@media (min-width: 901px) and (max-height: 760px) {
  .kanaflip__topbar {
    padding-top: var(--space-3);
    padding-bottom: var(--space-3);
  }

  .kanaflip__main {
    padding-bottom: var(--space-2);
    gap: var(--space-3);
  }

  .kanaflip__hero-figure {
    max-width: min(100%, 320px);
  }

  .kanaflip__footer {
    padding-top: var(--space-2);
    padding-bottom: var(--space-2);
  }
}

/* Decorative kana wash */
.kanaflip__wash {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: 0.07;
  font-family: "Noto Sans JP", var(--font-sans);
  font-weight: 700;
  font-size: clamp(2.5rem, 8vw, 5rem);
  line-height: 1.15;
  letter-spacing: 0.08em;
  color: hsl(var(--kanaflip-hue) 50% 62%);
  white-space: pre-wrap;
  padding: clamp(var(--space-4), 6vw, var(--space-8));
  transform: rotate(-6deg) scale(1.02);
  transform-origin: center;
  user-select: none;
}

@media (prefers-reduced-motion: no-preference) {
  .kanaflip__wash {
    animation: kanaWashDrift 28s ease-in-out infinite alternate;
  }
}

@keyframes kanaWashDrift {
  from { transform: rotate(-6deg) scale(1.02) translateY(0); }
  to   { transform: rotate(-5deg) scale(1.04) translateY(-2%); }
}

.kanaflip__topbar {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) clamp(var(--space-4), 4vw, var(--space-8));
  flex-shrink: 0;
}

.kanaflip__brand {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--color-text);
}

.kanaflip__brand-lockup {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
}

.kanaflip__brand-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.35);
}

.kanaflip__brand-name {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.kanaflip__brand-home {
  transition: color 0.25s ease;
}
.kanaflip__brand-home:hover {
  color: var(--kanaflip-accent);
}
.kanaflip__brand-home:focus-visible {
  outline: 2px solid var(--kanaflip-accent);
  outline-offset: 3px;
}

.kanaflip__main {
  position: relative;
  z-index: 1;
  flex: 1;
  display: grid;
  grid-template-columns: minmax(260px, 1fr) minmax(280px, 1.05fr);
  align-items: center;
  gap: clamp(var(--space-4), 4vw, var(--space-7));
  padding: clamp(var(--space-4), 2.5vh, var(--space-6)) clamp(var(--space-4), 4vw, var(--space-8)) clamp(var(--space-3), 2vh, var(--space-5));
  min-height: 0;
}

.kanaflip__copy {
  max-width: 28rem;
}

.kanaflip__eyebrow {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--kanaflip-accent);
  margin-bottom: var(--space-3);
}

.kanaflip__title {
  font-size: clamp(1.85rem, 4.2vw, 3.25rem);
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.08;
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.kanaflip__lead {
  font-size: clamp(0.88rem, 1.35vw, 1rem);
  color: var(--color-text-muted);
  line-height: 1.55;
  margin-bottom: var(--space-4);
  max-width: 26rem;
}

.kanaflip__chips {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-5);
}

.kanaflip__chip {
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  padding: var(--space-2) var(--space-3);
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background: rgba(255, 255, 255, 0.02);
}

.kanaflip__cta-group {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-3);
}

.kanaflip__cta-note {
  margin: 0;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
}

.kanaflip__cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 48px;
  padding: 0 var(--space-5);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: #0a0a0b;
  background: linear-gradient(
    180deg,
    hsl(var(--kanaflip-hue) 52% 72%) 0%,
    hsl(var(--kanaflip-hue) 48% 62%) 100%
  );
  border-radius: var(--radius-md);
  border: 1px solid hsla(var(--kanaflip-hue) 45% 55% / 0.45);
  box-shadow:
    0 1px 0 hsla(0, 0%, 100%, 0.15) inset,
    0 8px 32px hsla(var(--kanaflip-hue) 45% 35% / 0.35);
  transition: transform 0.2s var(--ease-out-expo), box-shadow 0.2s ease;
}
.kanaflip__cta:hover {
  transform: translateY(-1px);
  box-shadow:
    0 1px 0 hsla(0, 0%, 100%, 0.18) inset,
    0 12px 40px hsla(var(--kanaflip-hue) 45% 40% / 0.45);
}
.kanaflip__cta:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

.kanaflip__cta-icon {
  width: 1.1em;
  height: 1.1em;
  flex-shrink: 0;
}

/* Hero: promotional illustration */
.kanaflip__hero {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 0;
}

.kanaflip__hero-figure {
  margin: 0;
  width: 100%;
  max-width: min(100%, 380px);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.kanaflip__hero-art {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-md);
  box-shadow:
    0 24px 64px rgba(0, 0, 0, 0.45),
    0 0 80px hsla(var(--kanaflip-hue) 40% 50% / 0.12);
}

@media (prefers-reduced-motion: no-preference) {
  .kanaflip__hero-art {
    transition: transform 0.65s cubic-bezier(0.22, 1, 0.36, 1),
      box-shadow 0.65s cubic-bezier(0.22, 1, 0.36, 1);
  }

  .kanaflip__hero-figure:hover .kanaflip__hero-art {
    transform: translateY(-4px);
    box-shadow:
      0 28px 72px rgba(0, 0, 0, 0.5),
      0 0 96px hsla(var(--kanaflip-hue) 42% 52% / 0.16);
  }
}

.kanaflip__hero-caption {
  margin: var(--space-3) 0 0;
  text-align: center;
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  max-width: 22rem;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.35;
}

.kanaflip__footer {
  position: relative;
  z-index: 2;
  flex-shrink: 0;
  padding: var(--space-3) clamp(var(--space-4), 4vw, var(--space-8));
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: var(--space-3) var(--space-5);
  border-top: 1px solid var(--color-border);
  font-size: 0.7rem;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
}

.kanaflip__footer a {
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color 0.2s ease;
}
.kanaflip__footer a:hover {
  color: var(--color-accent);
}
.kanaflip__footer a:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

@media (max-width: 900px) {
  .kanaflip__main {
    grid-template-columns: 1fr;
    grid-template-rows: auto auto;
    text-align: center;
    gap: var(--space-4);
  }

  .kanaflip__copy {
    margin-left: auto;
    margin-right: auto;
  }

  .kanaflip__lead {
    margin-left: auto;
    margin-right: auto;
  }

  .kanaflip__chips {
    justify-content: center;
  }

  .kanaflip__cta-group {
    align-items: center;
  }

  .kanaflip__hero {
    order: -1;
  }

  .kanaflip__hero-figure {
    max-width: min(100%, 280px);
  }

  .kanaflip__hero-caption {
    font-size: 0.6rem;
    padding: 0 var(--space-2);
  }
}

@media (max-width: 380px) {
  .kanaflip__wash {
    font-size: 2rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .kanaflip__wash {
    animation: none !important;
  }
  .kanaflip__cta {
    transition: none;
  }
  .kanaflip__hero-art {
    transition: none !important;
    transform: none !important;
  }
  .kanaflip__hero-figure:hover .kanaflip__hero-art {
    transform: none !important;
  }
}

/* ─── Privacy / document page ────────────────────────────────────────────── */

body.kanaflip-privacy-page {
  overflow-y: auto;
}

/* Override the desktop fixed-height lock for the doc variant */
@media (min-width: 901px) {
  html.kanaflip-privacy-html {
    height: auto;
    overflow: auto;
  }

  body.kanaflip-privacy-page {
    height: auto;
    max-height: none;
    overflow-y: auto;
  }

  .kanaflip--doc {
    height: auto;
    max-height: none;
    min-height: 100dvh;
    overflow: visible;
  }
}

.kanaflip__doc-main {
  position: relative;
  z-index: 1;
  flex: 1;
  display: flex;
  justify-content: center;
  padding: var(--space-6) clamp(var(--space-4), 6vw, var(--space-8)) var(--space-8);
}

.kanaflip__policy {
  width: 100%;
  max-width: 42rem;
}

.kanaflip__policy-header {
  margin-bottom: var(--space-6);
}

.kanaflip__policy-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  font-size: 0.72rem;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
  margin-top: var(--space-3);
}

.kanaflip__policy-section {
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-6);
  border-bottom: 1px solid var(--color-border);
}

.kanaflip__policy-section:last-child {
  border-bottom: none;
}

.kanaflip__policy-section--highlight {
  background: hsla(var(--kanaflip-hue) 40% 50% / 0.08);
  border: 1px solid hsla(var(--kanaflip-hue) 40% 50% / 0.18);
  border-radius: var(--radius-md);
  padding: var(--space-4) var(--space-5);
  margin-bottom: var(--space-6);
}

.kanaflip__policy-summary {
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
}

.kanaflip__policy-section h2 {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--kanaflip-accent);
  margin-bottom: var(--space-3);
}

.kanaflip__policy-section p {
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
}

.kanaflip__policy-section p:last-child {
  margin-bottom: 0;
}

.kanaflip__policy-section ul {
  margin: var(--space-3) 0;
  padding-left: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.kanaflip__policy-section li {
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--color-text-muted);
}

.kanaflip__policy-section strong {
  color: var(--color-text);
  font-weight: 600;
}

.kanaflip__policy-contact {
  font-style: normal;
  margin-top: var(--space-3);
  font-size: 0.9rem;
  line-height: 1.9;
  color: var(--color-text-muted);
}

.kanaflip__policy-contact a {
  color: var(--kanaflip-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: opacity 0.2s ease;
}

.kanaflip__policy-contact a:hover {
  opacity: 0.75;
}

.kanaflip__policy-contact a:focus-visible {
  outline: 2px solid var(--kanaflip-accent);
  outline-offset: 2px;
}

@media (max-width: 900px) {
  .kanaflip__doc-main {
    padding-top: var(--space-4);
    padding-bottom: var(--space-6);
  }
}