:root {
  --sh-bg: #050816;
  --sh-bg-alt: #090f21;
  --sh-surface: #0f172a;
  --sh-surface-soft: #111827;
  --sh-accent: #38bdf8;
  --sh-accent-soft: rgba(56, 189, 248, 0.12);
  --sh-accent-strong: #0ea5e9;
  --sh-text: #e5e7eb;
  --sh-text-soft: #9ca3af;
  --sh-border-subtle: rgba(148, 163, 184, 0.3);
  --sh-radius-lg: 18px;
  --sh-radius-full: 999px;
  --sh-shadow-soft: 0 18px 45px rgba(15, 23, 42, 0.6);
  --sh-shadow-subtle: 0 10px 30px rgba(15, 23, 42, 0.45);
  --sh-font-sans: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Text",
    "Helvetica Neue", Arial, "Yu Gothic", "Hiragino Sans", "Noto Sans JP",
    "Meiryo", sans-serif;
}

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

html,
body {
  margin: 0;
  padding: 0;
}

body {
  min-height: 100vh;
  font-family: var(--sh-font-sans);
  background: radial-gradient(circle at top, #111827 0, var(--sh-bg) 45%);
  color: var(--sh-text);
  -webkit-font-smoothing: antialiased;
}

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

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

main {
  padding-top: 72px;
}

.sh-container {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 20px;
}

.sh-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 20;
  backdrop-filter: blur(18px);
  background: linear-gradient(
    to bottom,
    rgba(15, 23, 42, 0.9),
    rgba(15, 23, 42, 0.75),
    transparent
  );
  border-bottom: 1px solid rgba(30, 64, 175, 0.3);
}

.sh-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px 20px 10px;
}

.sh-logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.sh-logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 12px;
  background: radial-gradient(circle at 30% 0, #e0f2fe 0, #38bdf8 35%, #0ea5e9);
  color: #0b1220;
  font-weight: 700;
  font-size: 18px;
  box-shadow: 0 0 0 1px rgba(15, 23, 42, 0.4),
    0 18px 40px rgba(59, 130, 246, 0.5);
}

.sh-logo-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.sh-logo-title {
  font-size: 14px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: #e5e7eb;
}

.sh-logo-sub {
  font-size: 11px;
  color: var(--sh-text-soft);
}

.sh-nav {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 13px;
}

.sh-nav ul {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 18px;
  margin: 0;
  padding: 0;
}

.sh-nav a {
  position: relative;
  padding: 6px 0;
  color: var(--sh-text-soft);
  transition: color 0.18s ease;
}

.sh-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(to right, #38bdf8, #4f46e5);
  transition: width 0.18s ease;
}

.sh-nav a:hover {
  color: #f9fafb;
}

.sh-nav a:hover::after {
  width: 100%;
}

.sh-nav-toggle {
  display: none;
  width: 36px;
  height: 36px;
  padding: 0;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.5);
  background: rgba(15, 23, 42, 0.9);
  display: none;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

.sh-nav-toggle span {
  display: block;
  width: 16px;
  height: 2px;
  border-radius: 999px;
  background: #e5e7eb;
}

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

.sh-section-alt {
  background: radial-gradient(circle at top left, #1f2937 0, #020617 55%);
  border-top: 1px solid rgba(30, 64, 175, 0.5);
  border-bottom: 1px solid rgba(15, 23, 42, 1);
}

.sh-section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 40px;
}

.sh-section-header-left {
  text-align: left;
  margin-left: 0;
}

.sh-section-header h2 {
  font-size: 26px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin: 0 0 10px;
  color: #e5e7eb;
}

.sh-section-header p {
  margin: 0;
  color: var(--sh-text-soft);
  font-size: 14px;
  line-height: 1.7;
}

.sh-studio-intro {
  padding-top: 88px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(30, 64, 175, 0.35);
  background: linear-gradient(
    180deg,
    rgba(15, 23, 42, 0.55) 0,
    transparent 100%
  );
}

.sh-studio-intro h1 {
  font-size: clamp(22px, 2.6vw, 30px);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin: 0 0 6px;
  color: #e5e7eb;
}

.sh-studio-kana {
  margin: 0 0 18px;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--sh-text-soft);
}

.sh-studio-lead {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.85;
  color: #cbd5e1;
  max-width: 760px;
}

.sh-studio-note {
  margin: 0;
  font-size: 12px;
  line-height: 1.75;
  color: var(--sh-text-soft);
  max-width: 760px;
}

.sh-hero {
  padding-top: 96px;
  padding-bottom: 72px;
}

.sh-studio-intro + .sh-hero {
  padding-top: 56px;
}

.sh-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 2.5fr);
  gap: 40px;
  align-items: center;
}

.sh-hero-copy h1,
.sh-hero-copy .sh-hero-title {
  font-size: clamp(28px, 3.1vw, 36px);
  line-height: 1.3;
  margin: 10px 0 14px;
  font-weight: 700;
}

.sh-hero-highlight {
  background: radial-gradient(circle at 0 0, #e0f2fe 0, #38bdf8 36%, #4f46e5);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.sh-hero-lead {
  margin: 0 0 16px;
  font-size: 14px;
  color: var(--sh-text-soft);
  line-height: 1.8;
}

.sh-pill {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.9);
  border: 1px solid rgba(56, 189, 248, 0.6);
  color: #bae6fd;
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.sh-hero-points {
  list-style: none;
  padding: 0;
  margin: 0 0 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 13px;
  color: var(--sh-text-soft);
}

.sh-hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.sh-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 18px;
  border-radius: 999px;
  font-size: 13px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.14s ease, box-shadow 0.14s ease,
    background-color 0.14s ease, border-color 0.14s ease, color 0.14s ease;
  white-space: nowrap;
}

.sh-btn-primary {
  background: linear-gradient(135deg, #38bdf8, #4f46e5);
  color: #0b1120;
  box-shadow: 0 16px 35px rgba(59, 130, 246, 0.55);
}

.sh-btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 20px 45px rgba(59, 130, 246, 0.75);
}

.sh-btn-ghost {
  background: rgba(15, 23, 42, 0.9);
  border-color: rgba(148, 163, 184, 0.5);
  color: var(--sh-text-soft);
}

.sh-btn-ghost:hover {
  background: rgba(15, 23, 42, 1);
  border-color: var(--sh-accent);
  color: #e5e7eb;
}

.sh-hero-visual {
  display: flex;
  justify-content: center;
}

.sh-hero-card {
  width: 100%;
  max-width: 360px;
  border-radius: 26px;
  background: radial-gradient(circle at top left, #1d283a 0, #020617 60%);
  box-shadow: var(--sh-shadow-soft);
  border: 1px solid rgba(30, 64, 175, 0.9);
  padding: 14px 14px 16px;
  position: relative;
  overflow: hidden;
}

.sh-hero-card::before {
  content: "";
  position: absolute;
  inset: -40%;
  background: conic-gradient(
    from 160deg,
    rgba(56, 189, 248, 0),
    rgba(56, 189, 248, 0.9),
    rgba(129, 140, 248, 0),
    rgba(56, 189, 248, 0)
  );
  opacity: 0.16;
  mix-blend-mode: screen;
  pointer-events: none;
}

.sh-hero-card-header {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  color: var(--sh-text-soft);
  margin-bottom: 10px;
}

.sh-status-dot {
  width: 9px;
  height: 9px;
  border-radius: 999px;
  background: #22c55e;
  box-shadow: 0 0 0 5px rgba(34, 197, 94, 0.25);
}

.sh-status-soon {
  background: #f59e0b;
  box-shadow: 0 0 0 5px rgba(245, 158, 11, 0.28);
}

.sh-hero-card-body {
  display: grid;
  grid-template-columns: 2.25fr 1.25fr;
  gap: 8px;
  margin-bottom: 12px;
}

.sh-video-main,
.sh-video-sub {
  border-radius: 18px;
  background: radial-gradient(circle at 25% 0, #1d4ed8, #020617 70%);
  border: 1px solid rgba(30, 64, 175, 0.75);
  position: relative;
  overflow: hidden;
}

.sh-video-main::after,
.sh-video-sub::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(
      circle at 15% 20%,
      rgba(248, 250, 252, 0.18),
      transparent 55%
    ),
    radial-gradient(
      circle at 80% 80%,
      rgba(56, 189, 248, 0.4),
      transparent 55%
    ),
    radial-gradient(circle at 20% 80%, rgba(59, 130, 246, 0.35), transparent 55%);
  opacity: 0.75;
  mix-blend-mode: screen;
}

.sh-video-main {
  aspect-ratio: 4 / 3;
}

.sh-video-sub {
  aspect-ratio: 3 / 4;
}

.sh-hero-card-footer {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.sh-pill-soft {
  padding: 5px 10px;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.9);
  border: 1px solid rgba(148, 163, 184, 0.5);
  font-size: 11px;
  color: var(--sh-text-soft);
}

.sh-grid {
  display: grid;
  gap: 20px;
}

.sh-grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.sh-card {
  background: radial-gradient(circle at top left, #111827 0, #020617 70%);
  border-radius: var(--sh-radius-lg);
  border: 1px solid rgba(30, 64, 175, 0.85);
  padding: 18px 18px 16px;
  box-shadow: var(--sh-shadow-subtle);
}

.sh-card-soft {
  background: linear-gradient(145deg, #020617, #020617, #020617);
  border-color: var(--sh-border-subtle);
}

.sh-card h3 {
  margin: 0 0 8px;
  font-size: 16px;
}

.sh-card p {
  margin: 0 0 8px;
  font-size: 13px;
  color: var(--sh-text-soft);
  line-height: 1.8;
}

.sh-list {
  list-style: none;
  padding: 0;
  margin: 8px 0 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 13px;
  color: var(--sh-text-soft);
}

.sh-feature-layout {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
  margin-top: 40px;
}

.sh-feature-text h3 {
  font-size: 16px;
  margin: 0 0 6px;
}

.sh-feature-text p {
  margin: 0 0 10px;
  font-size: 13px;
  color: var(--sh-text-soft);
}

.sh-about-layout {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 2fr);
  gap: 24px;
  align-items: flex-start;
}

.sh-definition-list {
  margin: 20px 0 0;
  display: grid;
  gap: 12px;
  font-size: 13px;
}

.sh-definition-list dt {
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--sh-text-soft);
  margin-bottom: 2px;
}

.sh-definition-list dd {
  margin: 0;
  color: var(--sh-text);
}

.sh-about-aside .sh-card {
  position: sticky;
  top: 104px;
}

.sh-contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 2.3fr);
  gap: 24px;
  align-items: flex-start;
}

.sh-contact-form {
  background: rgba(15, 23, 42, 0.9);
  border-radius: 20px;
  border: 1px solid rgba(30, 64, 175, 0.9);
  padding: 18px 18px 16px;
  box-shadow: var(--sh-shadow-subtle);
}

.sh-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 12px;
}

.sh-field label {
  font-size: 13px;
}

.sh-field input,
.sh-field select,
.sh-field textarea {
  border-radius: 10px;
  border: 1px solid rgba(55, 65, 81, 0.9);
  background: rgba(15, 23, 42, 0.95);
  color: #e5e7eb;
  padding: 8px 10px;
  font-size: 13px;
  outline: none;
  transition: border-color 0.16s ease, box-shadow 0.16s ease,
    background-color 0.16s ease;
  font-family: inherit;
}

.sh-field input::placeholder,
.sh-field textarea::placeholder {
  color: #6b7280;
}

.sh-field input:focus,
.sh-field select:focus,
.sh-field textarea:focus {
  border-color: var(--sh-accent);
  box-shadow: 0 0 0 1px rgba(56, 189, 248, 0.35);
  background: #020617;
}

.sh-note {
  margin: 0 0 12px;
  font-size: 11px;
  color: var(--sh-text-soft);
}

.sh-note a {
  color: #bfdbfe;
  text-decoration: none;
}

.sh-note a:hover {
  color: #e5f2ff;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.sh-contact-side {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.sh-footer {
  border-top: 1px solid rgba(30, 64, 175, 0.6);
  background: linear-gradient(to top, #020617, #020617 40%, #020617 70%);
  padding: 16px 0 20px;
}

.sh-footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  font-size: 11px;
  color: var(--sh-text-soft);
}

.sh-footer-brand {
  display: flex;
  align-items: center;
  gap: 8px;
}

.sh-footer-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.sh-footer-small {
  font-size: 10px;
}

.sh-footer-copy {
  margin: 0;
}

html {
  scroll-behavior: smooth;
}

@media (max-width: 900px) {
  main {
    padding-top: 64px;
  }

  .sh-header-inner {
    padding-inline: 16px;
  }

  .sh-hero-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .sh-hero {
    padding-top: 80px;
  }

  .sh-studio-intro + .sh-hero {
    padding-top: 48px;
  }

  .sh-grid-3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .sh-feature-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .sh-about-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .sh-about-aside .sh-card {
    position: static;
  }

  .sh-contact-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 720px) {
  .sh-nav-toggle {
    display: inline-flex;
  }

  .sh-nav {
    position: absolute;
    inset: calc(100% - 4px) 12px auto 12px;
    border-radius: 16px;
    background: rgba(15, 23, 42, 0.98);
    border: 1px solid rgba(30, 64, 175, 0.9);
    box-shadow: 0 20px 35px rgba(15, 23, 42, 0.9);
    padding: 8px;
    transform-origin: top;
    transform: scaleY(0.9);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.16s ease, transform 0.16s ease;
  }

  .sh-nav ul {
    flex-direction: column;
    align-items: stretch;
  }

  .sh-nav a {
    padding: 8px 10px;
    border-radius: 10px;
  }

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

  .sh-nav a:hover {
    background: rgba(15, 23, 42, 0.9);
  }

  .sh-nav.is-open {
    opacity: 1;
    transform: scaleY(1);
    pointer-events: auto;
  }

  .sh-grid-3 {
    grid-template-columns: minmax(0, 1fr);
  }

  .sh-section {
    padding: 64px 0;
  }

  .sh-studio-intro {
    padding-top: 72px;
    padding-bottom: 40px;
  }

  .sh-footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}