:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --bg-soft: #f4faff;
  --bg-band: #edf8ff;
  --surface: #ffffff;
  --surface-translucent: rgba(255, 255, 255, 0.88);
  --ink: #071b57;
  --ink-soft: #24375f;
  --muted: #52627d;
  --line: #d7e7f2;
  --line-strong: #acd2e9;
  --pink: #e63e78;
  --pink-dark: #bd2459;
  --cyan: #16a8d5;
  --blue: #3284d0;
  --green: #38b938;
  --green-dark: #188a31;
  --gold: #d58a00;
  --shadow-sm: 0 10px 30px rgba(15, 52, 92, 0.09);
  --shadow-lg: 0 28px 70px rgba(15, 52, 92, 0.17);
  --radius-sm: 14px;
  --radius-md: 24px;
  --radius-lg: 40px;
  --container: 1180px;
  --font-rounded: ui-rounded, "Hiragino Maru Gothic ProN", "Hiragino Sans", "Yu Gothic", "YuGothic", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 94px;
}

body {
  margin: 0;
  overflow-x: hidden;
  color: var(--ink);
  background: var(--bg);
  font-family: var(--font-rounded);
  font-size: 16px;
  line-height: 1.8;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

img,
svg {
  display: block;
}

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

a {
  color: inherit;
  text-decoration: none;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

:focus-visible {
  outline: 4px solid rgba(22, 168, 213, 0.42);
  outline-offset: 4px;
  border-radius: 8px;
}

.skip-link {
  position: fixed;
  z-index: 1000;
  top: 12px;
  left: 12px;
  padding: 10px 16px;
  border-radius: 10px;
  color: #fff;
  background: var(--ink);
  transform: translateY(-150%);
  transition: transform 160ms ease;
}

.skip-link:focus {
  transform: translateY(0);
}

.container {
  width: min(var(--container), calc(100% - 48px));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  z-index: 100;
  top: 0;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  backdrop-filter: blur(18px) saturate(160%);
}

.header-inner {
  display: flex;
  min-height: 84px;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.brand {
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
  gap: 11px;
  font-weight: 900;
}

.brand img {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  box-shadow: var(--shadow-sm);
}

.brand-name {
  display: flex;
  align-items: center;
  font-size: 25px;
  font-weight: 900;
  letter-spacing: -0.04em;
  line-height: 1;
}

.brand-name .pink { color: var(--pink); }
.brand-name .cyan { color: var(--cyan); }
.brand-name .gold { color: var(--gold); }
.brand-name .blue { color: var(--blue); }

.brand-badge {
  margin-left: 4px;
  padding: 7px 10px 8px;
  border: 2px solid #fff;
  border-radius: 14px;
  color: #fff;
  background: linear-gradient(180deg, #f45189, #d92b66);
  box-shadow: 0 0 0 2px var(--pink), 0 7px 18px rgba(230, 62, 120, 0.22);
  font-size: 22px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(20px, 3vw, 42px);
  color: var(--ink-soft);
  font-size: 15px;
  font-weight: 800;
}

.site-nav a:not(.nav-cta) {
  position: relative;
  padding-block: 10px;
}

.site-nav a:not(.nav-cta)::after {
  position: absolute;
  right: 0;
  bottom: 4px;
  left: 0;
  height: 2px;
  border-radius: 999px;
  background: var(--cyan);
  content: "";
  transform: scaleX(0);
  transition: transform 180ms ease;
}

.site-nav a:hover::after,
.site-nav a:focus-visible::after {
  transform: scaleX(1);
}

.nav-cta {
  padding: 9px 15px;
  border-radius: 11px;
  color: #fff;
  background: var(--ink);
}

.menu-button {
  display: none;
  width: 46px;
  height: 46px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 12px;
  color: var(--ink);
  background: var(--surface);
}

.menu-button svg {
  width: 100%;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-width: 2;
}

.hero {
  position: relative;
  min-height: 780px;
  overflow: hidden;
  isolation: isolate;
}

.hero::after {
  position: absolute;
  z-index: -2;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0) 55%, rgba(229, 247, 255, 0.7)),
    var(--bg);
  content: "";
}

.hero-glow {
  position: absolute;
  z-index: -1;
  top: 16px;
  right: max(-100px, calc((100vw - var(--container)) / 2 - 100px));
  width: min(52vw, 760px);
  aspect-ratio: 1;
  border-radius: 50%;
  background: #eaf7ff;
}

.hero-grid {
  display: grid;
  min-height: 760px;
  grid-template-columns: minmax(0, 1fr) minmax(470px, 0.9fr);
  align-items: center;
  gap: 70px;
  padding-block: 54px 42px;
}

.hero-copy {
  position: relative;
  z-index: 2;
  padding-bottom: 12px;
}

.hero h1 {
  max-width: 690px;
  margin: 0;
  color: var(--ink);
  font-size: clamp(48px, 5vw, 74px);
  font-weight: 900;
  letter-spacing: -0.055em;
  line-height: 1.28;
}

.hero-lead {
  margin: 24px 0 0;
  color: var(--ink-soft);
  font-size: clamp(17px, 1.55vw, 21px);
  font-weight: 700;
  letter-spacing: 0.01em;
  line-height: 1.95;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 30px;
}

.button {
  display: inline-flex;
  min-height: 58px;
  align-items: center;
  justify-content: center;
  gap: 11px;
  padding: 0 24px;
  border: 2px solid transparent;
  border-radius: 14px;
  font-size: 17px;
  font-weight: 900;
  line-height: 1.2;
  transition: transform 180ms ease, box-shadow 180ms ease, background-color 180ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button-primary {
  color: #fff;
  background: linear-gradient(180deg, #259df0, #147cd5);
  box-shadow: 0 14px 28px rgba(31, 137, 220, 0.25);
}

.button-primary:hover {
  box-shadow: 0 17px 34px rgba(31, 137, 220, 0.32);
}

.button-secondary {
  border-color: var(--green);
  color: var(--ink);
  background: var(--surface-translucent);
  box-shadow: var(--shadow-sm);
}

.button svg {
  width: 23px;
  height: 23px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
}

.button .apple-icon {
  width: 28px;
  height: 28px;
  fill: currentColor;
  stroke: none;
}

.button .arrow-icon {
  width: 18px;
  margin-left: 2px;
}

.device-support {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 30px;
  color: var(--ink-soft);
  font-size: 15px;
  font-weight: 700;
}

.device-support svg {
  width: 66px;
  height: 28px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.7;
}

.hero-mascot {
  position: absolute;
  right: 38px;
  bottom: -4px;
  width: 112px;
  max-height: 145px;
  object-fit: contain;
  object-position: center;
  filter: drop-shadow(0 12px 10px rgba(31, 107, 159, 0.12));
}

.hero-media {
  position: relative;
  display: flex;
  min-height: 650px;
  align-items: center;
  justify-content: flex-end;
}

.phone {
  position: relative;
  z-index: 2;
  width: min(100%, 370px);
  padding: 13px;
  border: 2px solid #0a111a;
  border-radius: 48px;
  background: #111820;
  box-shadow: var(--shadow-lg);
}

.phone-speaker {
  position: absolute;
  z-index: 4;
  top: 17px;
  left: 50%;
  width: 106px;
  height: 28px;
  border-radius: 0 0 17px 17px;
  background: #090d12;
  transform: translateX(-50%);
}

.phone-screen {
  overflow: hidden;
  height: 684px;
  border-radius: 36px;
  background: #fff;
}

.phone-screen img {
  width: 100%;
  height: auto;
}

.rhythm-card {
  position: absolute;
  z-index: 3;
  bottom: 48px;
  left: -72px;
  width: 220px;
  overflow: hidden;
  border: 2px solid #8ad9f1;
  border-radius: 24px;
  background: var(--surface);
  box-shadow: var(--shadow-lg);
}

.rhythm-card img {
  width: 100%;
  height: 310px;
  object-fit: cover;
  object-position: top center;
}

.rhythm-label {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 11px 8px;
  color: var(--ink);
  background: #f2fbff;
  font-size: 13px;
  font-weight: 900;
}

.rhythm-label svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: var(--cyan);
  stroke-width: 2;
}

.decorative-dots {
  position: absolute;
  right: -24px;
  bottom: 105px;
  width: 84px;
  height: 84px;
  opacity: 0.65;
  background-image: radial-gradient(circle, #fff 3px, transparent 4px);
  background-size: 18px 18px;
}

.section-intro {
  padding: 58px 0 64px;
  text-align: center;
  background: var(--bg-band);
}

.section-intro h2 {
  margin: 0;
  font-size: clamp(30px, 3.4vw, 48px);
  font-weight: 900;
  letter-spacing: -0.035em;
  line-height: 1.35;
}

.heading-line {
  display: block;
  width: 72px;
  height: 5px;
  margin: 20px auto 0;
  border-radius: 999px;
  background: var(--blue);
}

.section {
  padding: 110px 0;
}

.features-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(400px, 0.82fr);
  align-items: center;
  gap: 86px;
}

.section-label {
  margin: 0 0 12px;
  color: var(--blue);
  font-size: 14px;
  font-weight: 900;
  letter-spacing: 0.16em;
}

.feature-copy > h2,
.section-heading h2,
.contact-copy h2 {
  margin: 0;
  color: var(--ink);
  font-size: clamp(36px, 4vw, 56px);
  font-weight: 900;
  letter-spacing: -0.045em;
  line-height: 1.36;
}

.section-description {
  max-width: 620px;
  margin: 22px 0 0;
  color: var(--muted);
  font-size: 17px;
  font-weight: 600;
}

.feature-list {
  display: grid;
  gap: 6px;
  margin: 34px 0 0;
  padding: 0;
  list-style: none;
}

.feature-list li {
  display: grid;
  grid-template-columns: 60px 1fr;
  align-items: center;
  gap: 18px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.feature-list li:last-child {
  border-bottom: 0;
}

.feature-list h3 {
  margin: 0;
  font-size: 18px;
  font-weight: 900;
  line-height: 1.5;
}

.feature-list p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.7;
}

.feature-icon {
  display: grid;
  width: 56px;
  height: 56px;
  place-items: center;
  border-radius: 50%;
}

.feature-icon svg {
  width: 28px;
  height: 28px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
}

.cyan-bg { color: #087eab; background: #e8f8ff; }
.green-bg { color: #188a31; background: #eaf9ea; }
.blue-bg { color: #2e72c4; background: #edf4ff; }
.gold-bg { color: #b66f00; background: #fff6dc; }

.feature-visual {
  position: relative;
  min-height: 680px;
}

.feature-window {
  position: absolute;
  inset: 0 14px 0 0;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-lg);
  background: var(--bg-soft);
  box-shadow: var(--shadow-lg);
}

.feature-window::before {
  position: absolute;
  z-index: 2;
  inset: 0;
  border: 11px solid var(--surface);
  border-radius: inherit;
  box-shadow: inset 0 0 0 1px var(--line);
  content: "";
  pointer-events: none;
}

.feature-window img {
  width: 100%;
  max-width: none;
  transform: translateY(-360px);
}

.roller-character {
  position: absolute;
  z-index: 3;
  right: -32px;
  bottom: -28px;
  width: 180px;
  filter: drop-shadow(0 16px 12px rgba(35, 95, 53, 0.18));
}

.how-to {
  position: relative;
  overflow: hidden;
  background: var(--bg-band);
}

.section-heading {
  max-width: 680px;
  margin: 0 auto;
  text-align: center;
}

.section-heading > p:last-child {
  margin: 16px 0 0;
  color: var(--muted);
  font-weight: 600;
}

.steps {
  position: relative;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin: 58px 0 0;
  padding: 0;
  counter-reset: step;
  list-style: none;
}

.steps::before {
  position: absolute;
  top: 55px;
  right: 15%;
  left: 15%;
  height: 3px;
  background: repeating-linear-gradient(90deg, var(--line-strong) 0 8px, transparent 8px 15px);
  content: "";
}

.step {
  position: relative;
  z-index: 1;
  padding: 34px 28px 30px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
  text-align: center;
}

.step-number {
  position: absolute;
  top: -17px;
  left: 22px;
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border: 4px solid var(--bg-band);
  border-radius: 50%;
  color: #fff;
  background: var(--blue);
  font-size: 18px;
  font-weight: 900;
}

.step-icon {
  display: grid;
  width: 70px;
  height: 70px;
  margin: 0 auto 20px;
  place-items: center;
  border: 1px solid #a8d8f0;
  border-radius: 50%;
  color: var(--blue);
  background: #f2fbff;
}

.step-icon svg {
  width: 34px;
  height: 34px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
}

.step h3 {
  margin: 0;
  font-size: 21px;
  font-weight: 900;
}

.step p {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.75;
}

.contact {
  background: var(--bg);
}

.contact-panel {
  position: relative;
  display: grid;
  overflow: hidden;
  grid-template-columns: minmax(0, 1fr) 350px;
  align-items: center;
  gap: 42px;
  padding: 64px 74px;
  border: 1px solid #b8dcf2;
  border-radius: var(--radius-lg);
  background: linear-gradient(120deg, var(--bg-soft), #eaf7ff);
  box-shadow: var(--shadow-lg);
}

.contact-copy {
  position: relative;
  z-index: 2;
}

.contact-copy > p:not(.section-label) {
  max-width: 620px;
  margin: 20px 0 28px;
  color: var(--muted);
  font-size: 17px;
  font-weight: 600;
}

.external-icon {
  width: 20px !important;
  height: 20px !important;
}

.contact-art {
  position: relative;
  min-height: 220px;
}

.contact-art img:first-child {
  position: absolute;
  top: 14px;
  left: 0;
  width: 132px;
  border-radius: 30px;
  box-shadow: var(--shadow-lg);
  transform: rotate(-4deg);
}

.contact-art img:last-child {
  position: absolute;
  right: 0;
  bottom: -20px;
  width: 210px;
  filter: drop-shadow(0 18px 15px rgba(24, 94, 55, 0.14));
}

.safety {
  padding: 0 0 90px;
  background: var(--bg);
}

.safety-inner {
  display: grid;
  grid-template-columns: 58px 1fr;
  align-items: start;
  gap: 20px;
  padding: 30px 34px;
  border: 1px solid #f0c35d;
  border-radius: 20px;
  background: #fffaf0;
}

.safety-icon {
  display: grid;
  width: 52px;
  height: 52px;
  place-items: center;
  border: 4px solid #fff;
  border-radius: 50%;
  color: #fff;
  background: #efaa13;
  box-shadow: 0 0 0 2px #efaa13;
  font-size: 27px;
  font-weight: 900;
}

.safety h2 {
  margin: 0;
  font-size: 22px;
  font-weight: 900;
}

.safety p {
  margin: 7px 0 0;
  color: #4d4b4a;
  font-size: 14px;
  font-weight: 600;
}

.site-footer {
  border-top: 1px solid var(--line);
  background: var(--bg-soft);
}

.footer-inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 28px;
  min-height: 108px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.footer-brand {
  color: var(--ink);
  font-size: 16px;
  font-weight: 900;
}

.footer-inner nav {
  display: flex;
  gap: 28px;
}

.footer-inner nav a:hover {
  color: var(--blue);
}

.footer-inner p {
  margin: 0;
  text-align: right;
}

.js .reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 650ms ease, transform 650ms cubic-bezier(.2, .7, .2, 1);
}

.js .reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Support page */
.support-page {
  min-height: 100vh;
  background: var(--bg-soft);
}

.support-main {
  padding: 70px 0 100px;
}

.support-card {
  max-width: 840px;
  margin-inline: auto;
  padding: clamp(28px, 6vw, 64px);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: var(--shadow-lg);
}

.support-icon {
  width: 96px;
  border-radius: 24px;
  box-shadow: var(--shadow-sm);
}

.support-card h1 {
  margin: 0;
  font-size: clamp(38px, 6vw, 60px);
  font-weight: 900;
  line-height: 1.3;
}

.support-card h2 {
  margin: 44px 0 12px;
  font-size: 23px;
  font-weight: 900;
}

.support-card p,
.support-card li {
  color: var(--muted);
  font-weight: 600;
}

.support-card .button {
  margin-top: 18px;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 26px;
  color: var(--blue);
  font-weight: 900;
}

@media (max-width: 1050px) {
  .hero-grid {
    grid-template-columns: minmax(0, 1fr) minmax(410px, 0.85fr);
    gap: 34px;
  }

  .hero-mascot {
    right: 4px;
  }

  .rhythm-card {
    left: -22px;
    width: 190px;
  }

  .features-grid {
    gap: 50px;
  }
}

@media (max-width: 840px) {
  .container {
    width: min(100% - 32px, 680px);
  }

  .header-inner {
    min-height: 72px;
  }

  .brand img {
    width: 43px;
    height: 43px;
  }

  .brand-name {
    font-size: 21px;
  }

  .brand-badge {
    padding: 6px 9px 7px;
    font-size: 18px;
  }

  .menu-button {
    display: block;
  }

  .site-nav {
    position: absolute;
    top: calc(100% + 1px);
    right: 16px;
    left: 16px;
    display: grid;
    visibility: hidden;
    gap: 4px;
    padding: 14px;
    border: 1px solid var(--line);
    border-radius: 18px;
    background: var(--surface);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    transform: translateY(-8px);
    transition: opacity 160ms ease, transform 160ms ease, visibility 160ms ease;
  }

  .site-nav.is-open {
    visibility: visible;
    opacity: 1;
    transform: translateY(0);
  }

  .site-nav a {
    padding: 11px 13px !important;
    border-radius: 10px;
  }

  .site-nav a:hover {
    background: var(--bg-soft);
  }

  .site-nav a::after {
    display: none;
  }

  .nav-cta {
    margin-top: 3px;
    text-align: center;
  }

  .hero {
    min-height: auto;
  }

  .hero::after {
    background: var(--bg);
  }

  .hero-glow {
    top: 660px;
    right: -110px;
    width: 540px;
  }

  .hero-grid {
    min-height: 0;
    grid-template-columns: 1fr;
    gap: 54px;
    padding-block: 60px 62px;
  }

  .hero-copy {
    text-align: center;
  }

  .hero h1 {
    margin-inline: auto;
    font-size: clamp(42px, 11vw, 66px);
    line-height: 1.34;
  }

  .hero-lead {
    max-width: 590px;
    margin-inline: auto;
  }

  .hero-actions {
    justify-content: center;
  }

  .device-support {
    justify-content: center;
  }

  .hero-mascot {
    display: none;
  }

  .hero-media {
    min-height: 650px;
    justify-content: center;
  }

  .rhythm-card {
    left: calc(50% - 285px);
  }

  .decorative-dots {
    right: 4%;
  }

  .features-grid {
    grid-template-columns: 1fr;
    gap: 56px;
  }

  .feature-copy {
    max-width: 680px;
  }

  .feature-visual {
    width: min(100%, 560px);
    margin-inline: auto;
  }

  .steps {
    grid-template-columns: 1fr;
    gap: 26px;
  }

  .steps::before {
    top: 40px;
    bottom: 40px;
    left: 42px;
    width: 3px;
    height: auto;
    background: repeating-linear-gradient(180deg, var(--line-strong) 0 8px, transparent 8px 15px);
  }

  .step {
    display: grid;
    grid-template-columns: 70px 1fr;
    align-items: center;
    column-gap: 20px;
    padding: 28px 26px 28px 80px;
    text-align: left;
  }

  .step-number {
    top: 24px;
    left: 21px;
  }

  .step-icon {
    grid-row: 1 / 3;
    margin: 0;
  }

  .step h3,
  .step p {
    grid-column: 2;
  }

  .step p {
    margin-top: 4px;
  }

  .contact-panel {
    grid-template-columns: 1fr;
    padding: 48px;
  }

  .contact-art {
    display: none;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 18px;
    padding-block: 30px;
    text-align: center;
  }

  .footer-inner nav {
    justify-content: center;
    flex-wrap: wrap;
    gap: 12px 24px;
  }

  .footer-inner p {
    text-align: center;
  }
}

@media (max-width: 520px) {
  html {
    scroll-padding-top: 78px;
  }

  .container {
    width: min(100% - 28px, 460px);
  }

  .brand {
    gap: 8px;
  }

  .brand-name {
    font-size: 18px;
  }

  .brand-badge {
    padding: 5px 7px 6px;
    border-radius: 11px;
    font-size: 16px;
  }

  .hero-grid {
    gap: 36px;
    padding-top: 44px;
  }

  .hero h1 {
    font-size: clamp(39px, 12vw, 54px);
    letter-spacing: -0.06em;
  }

  .hero-lead {
    margin-top: 20px;
    font-size: 15px;
    line-height: 1.9;
  }

  .desktop-break {
    display: none;
  }

  .hero-actions {
    display: grid;
    gap: 12px;
    margin-top: 26px;
  }

  .button {
    width: 100%;
    min-height: 56px;
    padding-inline: 18px;
  }

  .device-support {
    align-items: flex-start;
    font-size: 13px;
  }

  .device-support svg {
    width: 58px;
  }

  .hero-media {
    min-height: 565px;
    align-items: flex-start;
  }

  .phone {
    width: 300px;
    border-radius: 41px;
  }

  .phone-screen {
    height: 560px;
    border-radius: 29px;
  }

  .phone-speaker {
    width: 90px;
    height: 24px;
  }

  .rhythm-card {
    bottom: 15px;
    left: 2px;
    width: 138px;
    border-radius: 18px;
  }

  .rhythm-label {
    padding: 8px 4px;
    font-size: 10px;
  }

  .rhythm-label svg {
    width: 16px;
    height: 16px;
  }

  .rhythm-card img {
    height: 205px;
  }

  .section-intro {
    padding: 46px 0 50px;
  }

  .section-intro h2 {
    font-size: 29px;
  }

  .section {
    padding: 78px 0;
  }

  .feature-copy > h2,
  .section-heading h2,
  .contact-copy h2 {
    font-size: 38px;
  }

  .feature-list li {
    grid-template-columns: 50px 1fr;
    gap: 14px;
  }

  .feature-icon {
    width: 48px;
    height: 48px;
  }

  .feature-icon svg {
    width: 24px;
    height: 24px;
  }

  .feature-visual {
    min-height: 500px;
  }

  .feature-window img {
    transform: translateY(-270px);
  }

  .roller-character {
    right: -8px;
    width: 130px;
  }

  .step {
    grid-template-columns: 1fr;
    gap: 10px;
    padding: 32px 24px 26px;
    text-align: center;
  }

  .steps::before {
    display: none;
  }

  .step-number {
    top: -16px;
    left: 20px;
  }

  .step-icon {
    grid-row: auto;
    margin: 0 auto 6px;
  }

  .step h3,
  .step p {
    grid-column: auto;
  }

  .contact-panel {
    padding: 38px 24px;
    border-radius: 28px;
  }

  .safety {
    padding-bottom: 66px;
  }

  .safety-inner {
    grid-template-columns: 1fr;
    padding: 26px 22px;
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #07122e;
    --bg-soft: #0b1a3b;
    --bg-band: #0d2045;
    --surface: #10264f;
    --surface-translucent: rgba(16, 38, 79, 0.9);
    --ink: #f7faff;
    --ink-soft: #e2ebf8;
    --muted: #b7c7dc;
    --line: #29446f;
    --line-strong: #3f6593;
    --shadow-sm: 0 12px 30px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 30px 72px rgba(0, 0, 0, 0.34);
  }

  .site-header {
    background: rgba(7, 18, 46, 0.9);
  }

  .hero::after {
    background: linear-gradient(90deg, rgba(7, 18, 46, 0) 55%, rgba(11, 33, 70, 0.84)), var(--bg);
  }

  .hero-glow {
    background: #0c224c;
  }

  .nav-cta,
  .button-primary {
    color: #fff;
  }

  .button-secondary {
    border-color: #55cf61;
  }

  .rhythm-label,
  .step-icon {
    background: #102b58;
  }

  .phone-screen,
  .rhythm-card img,
  .feature-window img {
    background: #fff;
  }

  .cyan-bg { color: #64d2ff; background: #123457; }
  .green-bg { color: #71db76; background: #153b38; }
  .blue-bg { color: #79b8ff; background: #172f5e; }
  .gold-bg { color: #ffd36a; background: #463817; }

  .contact-panel {
    background: linear-gradient(120deg, #0b1b3c, #102d58);
  }

  .safety-inner {
    border-color: #8f6d22;
    background: #2d281c;
  }

  .safety p {
    color: #e5d9bd;
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }

  .js .reveal {
    opacity: 1;
    transform: none;
  }
}