*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .reveal {
    opacity: 1 !important;
    transform: none !important;
  }
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

a {
  color: inherit;
}

.wrap {
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 1rem + 2vw, 3rem);
}

/* ---------- background texture ---------- */

.kanji-mark {
  position: absolute;
  font-family: var(--font-display);
  font-weight: 400;
  color: var(--color-text);
  opacity: 0.045;
  line-height: 1;
  pointer-events: none;
  user-select: none;
  white-space: nowrap;
}

/* ---------- nav ---------- */

.nav {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 1.25rem;
  background: color-mix(in oklab, var(--color-bg) 82%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--duration-normal) var(--ease-out-expo);
}

.nav.is-scrolled {
  border-bottom-color: var(--color-border);
}

.nav__brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-display);
  font-size: 1.25rem;
  letter-spacing: 0.01em;
  text-decoration: none;
}

.nav__logo {
  width: 34px;
  height: 34px;
  border-radius: 9px;
  display: block;
  transition: transform var(--duration-normal) var(--ease-out-expo);
}

.nav__brand:hover .nav__logo {
  transform: rotate(-8deg) scale(1.05);
}

.nav__links {
  display: none;
  align-items: center;
  gap: clamp(1rem, 0.5rem + 1.5vw, 2.25rem);
  list-style: none;
  margin: 0;
  padding: 0;
}

@media (min-width: 720px) {
  .nav__links {
    display: flex;
  }
}

.nav__links a {
  position: relative;
  text-decoration: none;
  color: var(--color-text-muted);
  font-size: var(--text-small);
  letter-spacing: 0.02em;
  text-transform: uppercase;
  transition: color var(--duration-fast) ease;
}

.nav__links a::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: -5px;
  height: 1px;
  background: var(--color-accent-strong);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--duration-normal) var(--ease-out-expo);
}

.nav__links a:hover,
.nav__links a:focus-visible {
  color: var(--color-accent-strong);
}

.nav__links a:hover::after,
.nav__links a:focus-visible::after {
  transform: scaleX(1);
  transform-origin: left;
}

.nav__links a:focus-visible {
  outline: 1px solid var(--color-accent);
  outline-offset: 4px;
  border-radius: 2px;
}

.nav__cta {
  display: inline-flex;
  flex-shrink: 0;
}

/* ---------- mobile nav toggle ---------- */

.nav__toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  flex-shrink: 0;
  padding: 0;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  background: transparent;
  cursor: pointer;
}

.nav__toggle span {
  display: block;
  width: 18px;
  height: 1.5px;
  background: var(--color-text);
  transition: transform var(--duration-fast) var(--ease-out-expo),
    opacity var(--duration-fast) ease;
}

.nav__toggle[aria-expanded='true'] span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}

.nav__toggle[aria-expanded='true'] span:nth-child(2) {
  opacity: 0;
}

.nav__toggle[aria-expanded='true'] span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

@media (min-width: 720px) {
  .nav__toggle {
    display: none;
  }
}

@media (max-width: 719px) {
  .nav__links {
    display: flex;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0 clamp(1.25rem, 1rem + 2vw, 3rem);
    background: var(--color-bg);
    border-bottom: 1px solid transparent;
    max-height: 0;
    overflow: hidden;
    visibility: hidden;
    transition: max-height var(--duration-normal) var(--ease-out-expo),
      visibility 0s linear var(--duration-normal);
  }

  .nav__links.is-open {
    max-height: 60vh;
    visibility: visible;
    border-bottom-color: var(--color-border);
    padding-bottom: 1.25rem;
    transition: max-height var(--duration-normal) var(--ease-out-expo),
      visibility 0s linear;
  }

  .nav__links li {
    border-top: 1px solid var(--color-border);
  }

  .nav__links li:first-child {
    border-top: none;
  }

  .nav__links a {
    display: block;
    padding: 0.9rem 0;
  }

  .nav__links a::after {
    display: none;
  }
}

/* ---------- buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.6rem;
  border-radius: 999px;
  font-size: var(--text-small);
  font-weight: 600;
  letter-spacing: 0.01em;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform var(--duration-fast) var(--ease-out-expo),
    box-shadow var(--duration-fast) var(--ease-out-expo),
    border-color var(--duration-fast) ease,
    background var(--duration-fast) ease;
}

.btn:focus-visible {
  outline: 2px solid var(--color-accent-strong);
  outline-offset: 3px;
}

.btn--primary {
  position: relative;
  overflow: hidden;
  background: linear-gradient(155deg, var(--color-accent-strong), var(--color-accent) 75%);
  color: #16130a;
  box-shadow: 0 8px 24px -8px rgba(217, 171, 90, 0.5);
}

.btn--primary::before {
  content: '';
  position: absolute;
  top: 0;
  left: -60%;
  width: 40%;
  height: 100%;
  background: linear-gradient(
    115deg,
    transparent,
    rgba(255, 255, 255, 0.55),
    transparent
  );
  transform: skewX(-20deg);
  transition: left var(--duration-normal) var(--ease-out-expo);
}

.btn--primary:hover::before {
  left: 130%;
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 32px -10px rgba(217, 171, 90, 0.6);
}

.btn--ghost {
  background: transparent;
  border-color: var(--color-border-strong);
  color: var(--color-text);
}

.btn--ghost:hover {
  border-color: var(--color-accent);
  color: var(--color-accent-strong);
}

.btn--sm {
  padding: 0.6rem 1.1rem;
  font-size: 0.8rem;
}

/* ---------- hero ---------- */

.hero {
  position: relative;
  padding-block: clamp(3.5rem, 3rem + 4vw, 6.5rem) var(--space-section);
  overflow: hidden;
}

.hero .kanji-mark {
  top: -2rem;
  right: -1rem;
  font-size: clamp(8rem, 6rem + 10vw, 16rem);
  writing-mode: vertical-rl;
  will-change: transform;
}

.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.9rem;
  border: 1px solid var(--color-border-strong);
  border-radius: 999px;
  font-size: var(--text-small);
  color: var(--color-accent-strong);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: var(--space-md);
}

.hero__eyebrow::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent-strong);
}

.hero__title {
  font-family: var(--font-display);
  font-size: var(--text-hero);
  line-height: 1.02;
  margin: 0 0 var(--space-md);
  max-width: 16ch;
  font-weight: 400;
}

.hero__title em {
  font-style: normal;
  color: var(--color-accent-strong);
}

.hero__lead {
  font-size: var(--text-lead);
  color: var(--color-text-muted);
  max-width: 46ch;
  margin: 0 0 var(--space-lg);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: var(--space-lg);
}

.hero__proof {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(1.5rem, 1rem + 2vw, 3rem);
  color: var(--color-text-faint);
  font-size: var(--text-small);
}

.hero__proof strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--color-text);
  font-weight: 400;
}

.hero__visual-wrap {
  margin-top: clamp(3rem, 2rem + 4vw, 5rem);
}

.hero__visual {
  position: relative;
  display: flex;
  justify-content: center;
  gap: clamp(1rem, 0.5rem + 2vw, 2.5rem);
  perspective: 1400px;
  transform: rotateX(var(--tilt-x, 0deg)) rotateY(var(--tilt-y, 0deg));
  transition: transform 500ms var(--ease-out-expo);
  transform-style: preserve-3d;
}

.phone {
  width: clamp(150px, 12vw + 100px, 230px);
  border-radius: 28px;
  overflow: hidden;
  border: 6px solid #05060a;
  background: #05060a;
  box-shadow: 0 30px 60px -20px rgba(0, 0, 0, 0.7), 0 0 0 1px var(--color-border);
}

.phone img {
  border-radius: 22px;
}

.phone--tilt-left {
  animation: float-left 7s ease-in-out infinite;
}

.phone--front {
  animation: float-front 7s ease-in-out infinite 0.4s;
}

.phone--tilt-right {
  animation: float-right 7.5s ease-in-out infinite 0.2s;
}

@keyframes float-left {
  0%, 100% { transform: translateY(1.5rem) rotate(-4deg); }
  50% { transform: translateY(0.9rem) rotate(-5deg); }
}

@keyframes float-front {
  0%, 100% { transform: translateY(-0.5rem); }
  50% { transform: translateY(-1.2rem); }
}

@keyframes float-right {
  0%, 100% { transform: translateY(2.5rem) rotate(4deg); }
  50% { transform: translateY(1.8rem) rotate(5deg); }
}

@media (prefers-reduced-motion: reduce) {
  .phone--tilt-left,
  .phone--front,
  .phone--tilt-right {
    animation: none;
  }
  .hero__visual {
    transform: none;
  }
}

.phone--front {
  z-index: 2;
}

/* ---------- section shell ---------- */

.section {
  padding-block: var(--space-section);
  position: relative;
  border-top: 1px solid var(--color-border);
}

.section__head {
  max-width: 56ch;
  margin-bottom: var(--space-lg);
}

.section__eyebrow {
  display: block;
  font-size: var(--text-small);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 0.75rem;
}

.section__title {
  font-family: var(--font-display);
  font-size: var(--text-h1);
  font-weight: 400;
  margin: 0 0 0.75rem;
  line-height: 1.1;
}

.section__lead {
  color: var(--color-text-muted);
  font-size: var(--text-lead);
  margin: 0;
}

/* ---------- feature bento ---------- */

.bento {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 1rem;
}

.feature-card {
  position: relative;
  padding: var(--space-md);
  border-radius: var(--radius-lg);
  background: linear-gradient(160deg, var(--color-bg-raised), var(--color-bg-raised-2));
  border: 1px solid var(--color-border);
  grid-column: span 6;
  transition: transform var(--duration-normal) var(--ease-out-expo),
    border-color var(--duration-normal) ease, background var(--duration-normal) ease;
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-border-strong);
}

.feature-card--wide {
  grid-column: span 6;
}

@media (min-width: 700px) {
  .feature-card--wide {
    grid-column: span 4;
  }
  .feature-card--tall {
    grid-column: span 2;
  }
}

@media (min-width: 980px) {
  .feature-card {
    grid-column: span 2;
  }
  .feature-card--wide {
    grid-column: span 4;
  }
  .feature-card--hero {
    grid-column: span 3;
  }
}

.feature-card__icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--color-accent-dim);
  color: var(--color-accent-strong);
  display: grid;
  place-items: center;
  margin-bottom: 1.1rem;
  font-size: 1.2rem;
}

.feature-card h3 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 1.2rem;
  margin: 0 0 0.4rem;
}

.feature-card p {
  color: var(--color-text-muted);
  font-size: 0.925rem;
  margin: 0;
}

/* ---------- how it works ---------- */

.steps {
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 780px) {
  .steps {
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
  }
}

.step {
  position: relative;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border);
}

.step__num {
  display: block;
  font-family: var(--font-display);
  font-size: 1.75rem;
  color: var(--color-accent);
  margin-bottom: 0.75rem;
}

.step h3 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 1.15rem;
  margin: 0 0 0.5rem;
}

.step p {
  color: var(--color-text-muted);
  font-size: 0.925rem;
  margin: 0;
  max-width: 36ch;
}

/* ---------- showcase ---------- */

.showcase {
  display: grid;
  gap: 2.5rem;
}

@media (min-width: 860px) {
  .showcase {
    grid-template-columns: 1fr 1fr;
    align-items: center;
  }
  .showcase--reverse .showcase__media {
    order: 2;
  }
}

.showcase__media {
  display: flex;
  justify-content: center;
}

.showcase__media .phone {
  width: min(280px, 70vw);
}

.showcase__eyebrow {
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: var(--text-small);
  margin-bottom: 0.75rem;
  display: block;
}

.showcase__title {
  font-family: var(--font-display);
  font-size: var(--text-h2);
  font-weight: 400;
  margin: 0 0 0.9rem;
}

.showcase__body {
  color: var(--color-text-muted);
  margin: 0 0 1.5rem;
  max-width: 44ch;
}

.showcase__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.65rem;
}

.showcase__list li {
  display: flex;
  gap: 0.65rem;
  color: var(--color-text);
  font-size: 0.95rem;
}

.showcase__list li::before {
  content: '';
  width: 6px;
  height: 6px;
  margin-top: 0.55rem;
  border-radius: 50%;
  background: var(--color-accent);
  flex-shrink: 0;
}

.showcase + .showcase {
  margin-top: clamp(3rem, 2rem + 4vw, 6rem);
}

/* ---------- stats strip ---------- */

.stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  padding-block: var(--space-lg);
}

@media (min-width: 700px) {
  .stats {
    grid-template-columns: repeat(4, 1fr);
  }
}

.stat strong {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 1.5rem + 1.2vw, 2.5rem);
  color: var(--color-accent-strong);
  font-weight: 400;
}

.stat span {
  color: var(--color-text-faint);
  font-size: var(--text-small);
}

/* ---------- CTA ---------- */

/* ---------- legal prose ---------- */

.legal {
  padding-block: clamp(3rem, 2.5rem + 2vw, 5rem) var(--space-section);
}

.legal__header {
  max-width: 64ch;
  margin-bottom: var(--space-lg);
}

.legal__eyebrow {
  display: block;
  font-size: var(--text-small);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 0.75rem;
}

.legal__title {
  font-family: var(--font-display);
  font-size: var(--text-h1);
  font-weight: 400;
  margin: 0 0 0.5rem;
  line-height: 1.1;
}

.legal__updated {
  color: var(--color-text-faint);
  font-size: var(--text-small);
  margin: 0;
}

.legal__body {
  max-width: 68ch;
}

.legal__body h2 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 1.4rem;
  margin: 2.5rem 0 1rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
}

.legal__body h2:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: none;
}

.legal__body p {
  color: var(--color-text-muted);
  margin: 0 0 1rem;
}

.legal__body ul {
  color: var(--color-text-muted);
  margin: 0 0 1rem;
  padding-left: 1.25rem;
}

.legal__body li {
  margin-bottom: 0.5rem;
}

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

.legal__body a {
  color: var(--color-accent-strong);
}

.cta {
  text-align: center;
  padding-block: var(--space-section);
  position: relative;
}

.cta__kanji {
  left: 50%;
  top: 0;
  font-size: clamp(6rem, 5rem + 8vw, 12rem);
  animation: kanji-drift 50s linear infinite;
}

@keyframes kanji-drift {
  0% { transform: translateX(-50%) rotate(0deg); }
  50% { transform: translateX(-50%) rotate(3deg); }
  100% { transform: translateX(-50%) rotate(0deg); }
}

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

.cta__title {
  font-family: var(--font-display);
  font-size: var(--text-h1);
  font-weight: 400;
  max-width: 20ch;
  margin: 0 auto var(--space-md);
}

.cta__lead {
  max-width: 40ch;
  margin-inline: auto;
  margin-bottom: 2rem;
}

.cta__actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1rem;
}

/* ---------- footer ---------- */

.footer {
  border-top: 1px solid var(--color-border);
  padding-block: var(--space-lg);
  color: var(--color-text-faint);
  font-size: var(--text-small);
}

.footer__row {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  justify-content: space-between;
  align-items: center;
}

.footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer__links a {
  text-decoration: none;
  color: var(--color-text-faint);
  transition: color var(--duration-fast) ease;
}

.footer__links a:hover {
  color: var(--color-accent-strong);
}

/* ---------- scroll reveal ---------- */

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.8s var(--ease-out-expo), transform 0.8s var(--ease-out-expo);
  will-change: opacity, transform;
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- feature card polish ---------- */

.feature-card {
  will-change: transform;
}

.feature-card__icon {
  transition: transform var(--duration-normal) var(--ease-out-expo);
}

.feature-card:hover .feature-card__icon {
  transform: scale(1.1) rotate(-6deg);
}

.showcase__media .phone {
  transition: transform var(--duration-normal) var(--ease-out-expo);
}

.showcase__media:hover .phone {
  transform: translateY(-6px);
}

/* App Store Download Buttons */
.dl-storerow {
  display: flex;
  flex-wrap: wrap;
  gap: 40px;
  justify-content: center;
  margin-top: 30px;
}

.dl-storebtn {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  transition: opacity var(--duration-normal) var(--ease-out-expo);
  color: #fff;
  font-size: 1.05rem;
  font-weight: 500;
}

.dl-storebtn:hover {
  opacity: 0.8;
}

.dl-storebtn-ico {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  flex-shrink: 0;
}

.dl-storebtn-ico svg {
  width: 24px;
  height: 24px;
}

.dl-storebtn span:last-child {
  display: flex;
  flex-direction: column;
  line-height: 1;
  text-decoration: underline;
}

.dl-storebtn span:last-child span:first-child {
  display: none;
}

.dl-storebtn span:last-child span:last-child {
  font-size: 1.05rem;
  font-weight: 500;
  color: #fff;
}