:root {
  --bg: #f7f3ea;
  --surface: #fffdf8;
  --text: #24303a;
  --muted: #6e777f;
  --line: #ded8cc;
  --accent: #6aa7b8;
  --accent-dark: #467f90;
  --navy: #1c2b4a;
  --gold: #c4933a;
  --gold-glow: rgba(196, 147, 58, 0.13);
  --blue-glow: rgba(106, 167, 184, 0.13);
  --max: 860px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", "Noto Sans JP", sans-serif;
  line-height: 1.8;
}

a {
  color: var(--accent-dark);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

header {
  border-bottom: 1px solid var(--line);
  background: rgba(247, 243, 234, 0.94);
  position: sticky;
  top: 0;
  backdrop-filter: blur(10px);
}

.header-inner,
main,
footer {
  width: min(calc(100% - 32px), var(--max));
  margin: 0 auto;
}

.header-inner {
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 8px;
}

.brand-icon {
  width: 36px;
  height: 36px;
  border-radius: 22%;
  flex-shrink: 0;
}

.nav-hide-mobile { display: inline; }

nav {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.92rem;
}

nav a:hover {
  color: var(--text);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

main { padding: 72px 0 88px; }

.hero {
  padding: 48px 0 56px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent-dark);
  font-weight: 700;
  letter-spacing: 0.04em;
  font-size: 0.9rem;
}

h1 {
  font-size: clamp(2.4rem, 8vw, 4.8rem);
  line-height: 1.08;
  margin: 0 0 20px;
  letter-spacing: -0.04em;
}

.lead {
  font-size: 1.15rem;
  color: var(--muted);
  max-width: 680px;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 40px;
}

.card {
  display: block;
  padding: 24px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 18px;
  color: var(--text);
  text-decoration: none;
}

.card strong {
  display: block;
  margin-bottom: 8px;
}

.card span {
  color: var(--muted);
  font-size: 0.94rem;
}

.card:hover {
  border-color: var(--accent);
}

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

.document {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: clamp(24px, 5vw, 56px);
}

.document h1 {
  font-size: clamp(2rem, 6vw, 3.3rem);
  margin-bottom: 8px;
}

.document h2 {
  margin-top: 2.2em;
  font-size: 1.25rem;
}

.meta {
  color: var(--muted);
  margin-bottom: 40px;
}

.document ol,
.document ul {
  padding-left: 1.4em;
}

.contact-box {
  margin-top: 32px;
  padding: 20px;
  background: #f2eee5;
  border-radius: 14px;
}

footer {
  padding: 28px 0 44px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.9rem;
}

footer nav {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}

footer nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.9rem;
}

footer nav a:hover {
  color: var(--text);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.copyright { margin: 0; }

@media (max-width: 720px) {
  .header-inner {
    align-items: flex-start;
    flex-direction: column;
    padding: 14px 0;
  }

  nav { gap: 12px; }

  main { padding-top: 36px; }

  .card-grid { grid-template-columns: 1fr; }
}

/* ======== LP ======== */

/* --- Layout --- */
.lp-body { padding: 0; }

.lp-section { padding: 80px 0; }

.lp-inner {
  width: min(calc(100% - 32px), var(--max));
  margin: 0 auto;
}

.lp-center { text-align: center; }
.lp-center .lp-section-lead { margin-left: auto; margin-right: auto; }

/* --- Eyebrow --- */
.lp-eyebrow {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-dark);
  margin: 0 0 14px;
}

/* --- Section typography --- */
.lp-section-title {
  font-size: clamp(1.5rem, 3.8vw, 2.1rem);
  line-height: 1.28;
  letter-spacing: -0.025em;
  margin: 0 0 20px;
  font-weight: 700;
}

.lp-section-lead {
  color: var(--muted);
  font-size: 0.96rem;
  max-width: 540px;
  line-height: 1.85;
  margin: 0;
}

.lp-section-lead--mt { margin-top: 12px; }

/* --- Section backgrounds --- */
.bg-surface {
  background: var(--surface);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

/* --- First View --- */
.lp-fv {
  padding: 72px 0 64px;
  overflow: hidden;
  position: relative;
}

.fv-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.fv-text { padding-right: 16px; }

.fv-h1 {
  font-size: clamp(2rem, 5.5vw, 3.4rem);
  line-height: 1.15;
  letter-spacing: -0.035em;
  margin: 0 0 18px;
}

.fv-lead {
  font-size: 1.05rem;
  color: var(--muted);
  line-height: 1.85;
  margin: 0 0 28px;
}

.fv-cta-note {
  font-size: 0.9rem;
  margin: 0;
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.fv-badge {
  display: inline-block;
  background: var(--text);
  color: var(--surface);
  padding: 9px 20px;
  border-radius: 100px;
  font-size: 0.88rem;
  font-weight: 600;
  white-space: nowrap;
}

.fv-cta-note a {
  color: var(--accent-dark);
  font-size: 0.88rem;
}

.fv-visual {
  position: relative;
  display: flex;
  justify-content: center;
}

.fv-glow {
  position: absolute;
  inset: -40px;
  background: radial-gradient(ellipse 80% 70% at 55% 50%, var(--gold-glow) 0%, transparent 65%);
  pointer-events: none;
  z-index: 0;
}

.fv-img {
  position: relative;
  z-index: 1;
  max-width: 100%;
  height: auto;
  border-radius: 20px;
  box-shadow: 0 12px 56px rgba(36, 48, 58, 0.1);
}

/* --- Concept section --- */
.concept-section {
  background:
    radial-gradient(ellipse 70% 60% at 50% 40%, var(--gold-glow) 0%, transparent 65%),
    var(--surface);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.concept-inner {
  max-width: 640px;
}

.concept-body-text {
  font-size: 1rem;
  line-height: 1.85;
  margin: 0 0 1em;
  color: var(--muted);
}

.concept-highlight {
  border-left: 2px solid var(--accent);
  padding: 0.4em 0 0.4em 1.2em;
  margin: 1.4em 0;
  line-height: 2.1;
  color: var(--text);
  font-size: 1rem;
}

/* --- Split layout --- */
.lp-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}

.lp-split--imgright .lp-split-img { order: 2; }
.lp-split--imgright .lp-split-text { order: 1; }

/* --- Image glow wrappers --- */
.img-glow-wrap {
  position: relative;
  display: inline-block;
}

.img-glow-wrap::before {
  content: '';
  position: absolute;
  inset: -32px;
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
}

.img-glow-warm::before {
  background: radial-gradient(ellipse, var(--gold-glow) 0%, transparent 65%);
}

.img-glow-blue::before {
  background: radial-gradient(ellipse, var(--blue-glow) 0%, transparent 65%);
}

.img-glow-wrap img {
  position: relative;
  z-index: 1;
  max-width: 100%;
  height: auto;
  border-radius: 20px;
  box-shadow: 0 8px 48px rgba(36, 48, 58, 0.1);
  display: block;
}

/* --- Steps --- */
.step-row {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 48px;
  align-items: center;
  margin-top: 56px;
}

.step-row--reverse .step-row-visual { order: 2; }
.step-row--reverse .step-row-text { order: 1; }

.step-row-visual { display: flex; justify-content: center; }

.step-number {
  font-size: 3rem;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: -0.05em;
  line-height: 1;
  margin: 0 0 10px;
  opacity: 0.65;
}

.step-title {
  font-size: 1.3rem;
  font-weight: 700;
  margin: 0 0 10px;
}

.step-desc {
  font-size: 0.95rem;
  color: var(--muted);
  line-height: 1.8;
  margin: 0;
  max-width: 360px;
}

/* --- Phone frame --- */
.phone-frame {
  border-radius: 38px;
  overflow: hidden;
  border: 1px solid rgba(36, 48, 58, 0.08);
  box-shadow:
    0 0 0 6px rgba(255, 255, 255, 0.7),
    0 12px 48px rgba(36, 48, 58, 0.14);
  background: #fff;
  display: inline-block;
  flex-shrink: 0;
}

.phone-frame img {
  display: block;
  width: 220px;
  height: 380px;
  object-fit: cover;
  object-position: top;
}

/* --- App screens gallery --- */
.screens-gallery {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 40px;
  justify-items: center;
}

.screen-item {
  margin: 0;
  text-align: center;
}

.screen-item .phone-frame { display: block; }

.screen-item .phone-frame img {
  width: 160px;
  height: 290px;
  object-fit: cover;
  object-position: top;
}

.screen-item figcaption {
  margin-top: 12px;
  font-size: 0.82rem;
  color: var(--muted);
}

/* --- Kai section --- */
.kai-section {
  background:
    radial-gradient(ellipse 60% 50% at 20% 50%, rgba(106, 167, 184, 0.07) 0%, transparent 65%),
    var(--bg);
  border-top: 1px solid rgba(106, 167, 184, 0.2);
  border-bottom: 1px solid rgba(106, 167, 184, 0.2);
}

.kai-visual {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

.kai-glow {
  position: absolute;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, var(--gold-glow) 0%, transparent 65%);
  border-radius: 50%;
  pointer-events: none;
}

.kai-img {
  width: 280px;
  height: 280px;
  object-fit: contain;
  position: relative;
  z-index: 1;
}

/* --- For whom --- */
.for-list {
  list-style: none;
  padding: 0;
  margin: 32px 0 0;
  display: grid;
  gap: 16px;
  max-width: 580px;
}

.for-list li {
  padding-left: 22px;
  position: relative;
  font-size: 0.97rem;
  line-height: 1.75;
  color: var(--text);
}

.for-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
}

/* --- Pricing --- */
.pricing-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: 40px 36px;
  max-width: 380px;
  margin: 40px auto 0;
  text-align: center;
}

.pricing-plan-name {
  font-size: 1rem;
  font-weight: 700;
  margin: 0 0 14px;
  color: var(--text);
}

.pricing-free-badge {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: 100px;
  letter-spacing: 0.04em;
  margin-bottom: 20px;
}

.pricing-price {
  font-size: clamp(2.4rem, 7vw, 3.4rem);
  font-weight: 800;
  letter-spacing: -0.05em;
  line-height: 1;
  margin: 0 0 4px;
}

.pricing-unit {
  font-size: 0.86rem;
  color: var(--muted);
  margin: 0 0 24px;
}

.pricing-features-list {
  list-style: none;
  padding: 0;
  margin: 0 0 24px;
  border-top: 1px solid var(--line);
  padding-top: 20px;
  display: grid;
  gap: 8px;
  text-align: left;
}

.pricing-features-list li {
  font-size: 0.86rem;
  color: var(--muted);
  padding-left: 16px;
  position: relative;
  line-height: 1.6;
}

.pricing-features-list li::before {
  content: '·';
  position: absolute;
  left: 4px;
  color: var(--accent);
  font-weight: 700;
}

.pricing-coming-note {
  font-size: 0.85rem;
  color: var(--muted);
  font-weight: 600;
  margin: 0;
}

/* --- FAQ --- */
.faq-list {
  margin: 36px 0 0;
  display: grid;
  gap: 8px;
}

.faq-item {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
}

.faq-q {
  list-style: none;
  cursor: pointer;
  padding: 18px 22px;
  font-weight: 700;
  font-size: 0.94rem;
  color: var(--text);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  user-select: none;
}

.faq-q::-webkit-details-marker { display: none; }
.faq-q::marker { content: none; }

.faq-q::after {
  content: '+';
  font-size: 1.3rem;
  font-weight: 400;
  color: var(--muted);
  flex-shrink: 0;
  line-height: 1;
}

details[open] > .faq-q::after { content: '−'; }

.faq-a {
  padding: 0 22px 18px;
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.8;
  margin: 0;
}

/* --- Final CTA --- */
.lp-cta {
  padding: 96px 0;
  text-align: center;
  background: var(--navy);
  color: var(--surface);
  position: relative;
  overflow: hidden;
}

.lp-cta-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.cta-glow-warm {
  position: absolute;
  top: -80px;
  left: 50%;
  transform: translateX(-50%);
  width: 700px;
  height: 400px;
  background: radial-gradient(ellipse, rgba(196, 147, 58, 0.18) 0%, transparent 60%);
}

.cta-glow-blue {
  position: absolute;
  bottom: -60px;
  right: -80px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(106, 167, 184, 0.15) 0%, transparent 60%);
}

.cta-stars {
  position: absolute;
  inset: 0;
}

.cta-stars::after {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(1.5px 1.5px at 12% 20%, rgba(255,255,255,0.55) 0%, transparent 100%),
    radial-gradient(1px 1px at 28% 72%, rgba(255,255,255,0.4) 0%, transparent 100%),
    radial-gradient(1.5px 1.5px at 45% 15%, rgba(255,255,255,0.6) 0%, transparent 100%),
    radial-gradient(1px 1px at 62% 58%, rgba(255,255,255,0.35) 0%, transparent 100%),
    radial-gradient(1.5px 1.5px at 78% 28%, rgba(255,255,255,0.5) 0%, transparent 100%),
    radial-gradient(1px 1px at 88% 75%, rgba(255,255,255,0.45) 0%, transparent 100%),
    radial-gradient(2px 2px at 35% 42%, rgba(255,255,255,0.3) 0%, transparent 100%),
    radial-gradient(1px 1px at 55% 85%, rgba(255,255,255,0.4) 0%, transparent 100%),
    radial-gradient(1.5px 1.5px at 92% 12%, rgba(255,255,255,0.5) 0%, transparent 100%),
    radial-gradient(1px 1px at 7% 50%, rgba(255,255,255,0.35) 0%, transparent 100%),
    radial-gradient(1px 1px at 70% 90%, rgba(255,255,255,0.3) 0%, transparent 100%);
}

.cta-icon {
  width: 80px;
  height: 80px;
  border-radius: 22%;
  margin: 0 auto 28px;
  display: block;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.lp-cta-title {
  font-size: clamp(1.6rem, 4vw, 2.5rem);
  letter-spacing: -0.03em;
  line-height: 1.3;
  margin: 0 0 14px;
  color: var(--surface);
  font-weight: 700;
}

.lp-cta-sub {
  font-size: 1rem;
  color: rgba(255, 253, 248, 0.65);
  margin: 0 0 36px;
}

.lp-coming-badge {
  display: inline-block;
  background: rgba(255, 253, 248, 0.1);
  color: rgba(255, 253, 248, 0.85);
  border: 1px solid rgba(255, 253, 248, 0.25);
  padding: 12px 28px;
  border-radius: 100px;
  font-size: 0.92rem;
  font-weight: 600;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

/* --- Animation --- */
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.kai-float {
  animation: float 4s ease-in-out infinite;
}

@media (prefers-reduced-motion: reduce) {
  .kai-float { animation: none; }
}

/* --- Mobile LP --- */
@media (max-width: 720px) {
  .lp-fv { padding: 48px 0 40px; }
  .lp-section { padding: 56px 0; }
  .lp-cta { padding: 64px 0; }

  .fv-inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .fv-text { padding-right: 0; }
  .fv-h1 { font-size: clamp(1.9rem, 8vw, 3rem); }

  .lp-split {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .lp-split--imgright .lp-split-img { order: -1; }
  .lp-split--imgright .lp-split-text { order: 0; }

  .step-row {
    grid-template-columns: 1fr;
    gap: 24px;
    margin-top: 40px;
  }
  .step-row--reverse .step-row-visual { order: -1; }
  .step-row--reverse .step-row-text { order: 0; }

  .phone-frame img { width: 180px; height: 310px; }

  .screens-gallery {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    justify-items: center;
  }

  .kai-img { width: 200px; height: 200px; }

  .pricing-card { padding: 28px 20px; }

  .nav-hide-mobile { display: none; }
}