:root {
  --bg: #0d0d14;
  --panel: rgba(255, 255, 255, 0.06);
  --text: #f5f5fa;
  --muted: #c7c7d8;
  --accent: #d7a9ff;
  --accent-2: #8de3ff;
  --ok: #86efac;
  --err: #fda4af;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: 'Noto Sans JP', sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  overflow-x: hidden;
}

.gradient-bg {
  position: fixed;
  inset: -20vmax;
  background:
    radial-gradient(circle at 10% 20%, rgba(141, 227, 255, .18), transparent 40%),
    radial-gradient(circle at 80% 20%, rgba(215, 169, 255, .2), transparent 42%),
    radial-gradient(circle at 50% 80%, rgba(255, 173, 197, .15), transparent 40%);
  z-index: -1;
}

.container {
  width: min(1080px, 92%);
  margin: 0 auto;
}

.header {
  position: sticky;
  top: 0;
  backdrop-filter: blur(8px);
  background: rgba(12, 12, 20, .7);
  border-bottom: 1px solid rgba(255, 255, 255, .08);
  z-index: 40;
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
}

.logo { height: 34px; }

.nav {
  display: flex;
  gap: 1.4rem;
}

.nav a {
  color: var(--text);
  text-decoration: none;
  font-size: .95rem;
  opacity: .9;
}

.menu-btn {
  display: none;
  border: 1px solid rgba(255, 255, 255, .25);
  border-radius: 10px;
  background: transparent;
  color: #fff;
  padding: .3rem .65rem;
}

.hero {
  padding: 4.8rem 0 3rem;
}

.hero-grid {
  display: grid;
  gap: 2rem;
  grid-template-columns: 1.15fr .85fr;
  align-items: center;
}

.label {
  letter-spacing: .16em;
  font-size: .78rem;
  font-weight: 600;
  color: var(--accent-2);
}

h1 {
  font-family: 'Josefin Sans', sans-serif;
  font-size: clamp(2rem, 5vw, 3.8rem);
  line-height: 1.2;
  margin: .4rem 0 1rem;
}

h1 span {
  color: var(--accent);
}

.lead { color: var(--muted); max-width: 46ch; }

.cta {
  display: inline-block;
  margin-top: 1.2rem;
  padding: .85rem 1.35rem;
  border-radius: 999px;
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  color: #111;
  font-weight: 700;
  text-decoration: none;
}

.hero-card,
.card,
.contact-form,
.section-grid,
.gallery-grid {
  background: var(--panel);
  border: 1px solid rgba(255, 255, 255, .09);
  border-radius: 22px;
}

.hero-card { padding: 1rem; }
.hero-card img { width: 100%; border-radius: 16px; }
.hero-card h2 { margin: .9rem 0 .3rem; font-size: 1.2rem; }
.hero-card p { margin: 0; color: var(--muted); }

.section { padding: 2rem 0; }
.section-grid { padding: 1.4rem 1.5rem; }
.section-grid h2,
.gallery h2,
.contact-wrap h2 { margin-top: 0; font-family: 'Josefin Sans', sans-serif; }

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.card { padding: 1.2rem; }
.card p { color: var(--muted); margin-bottom: 0; }

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: .8rem;
  padding: .8rem;
}

.tile {
  min-height: 180px;
  border-radius: 16px;
  background-size: cover;
  background-position: center;
}

.tile-a { background-image: linear-gradient(135deg, #f8b4d9, #a78bfa); }
.tile-b { background-image: linear-gradient(135deg, #93c5fd, #67e8f9); }
.tile-c { background-image: linear-gradient(135deg, #f9a8d4, #fda4af); }
.tile-d { background-image: linear-gradient(135deg, #c4b5fd, #ddd6fe); }

.contact-wrap {
  display: grid;
  grid-template-columns: .8fr 1.2fr;
  gap: 1rem;
}

.contact-sub { color: var(--muted); }

.contact-form {
  padding: 1rem;
  display: grid;
  gap: .75rem;
}

label {
  display: grid;
  gap: .3rem;
  font-size: .92rem;
}

input,
textarea,
button {
  font: inherit;
}

input,
textarea {
  width: 100%;
  background: rgba(0, 0, 0, .2);
  border: 1px solid rgba(255, 255, 255, .16);
  border-radius: 12px;
  color: #fff;
  padding: .62rem .7rem;
}

button {
  border: none;
  border-radius: 12px;
  padding: .75rem 1rem;
  font-weight: 700;
  background: linear-gradient(120deg, var(--accent-2), var(--accent));
  cursor: pointer;
}

.alert {
  margin: 0;
  padding: .58rem .7rem;
  border-radius: 10px;
  font-size: .9rem;
}

.success { background: rgba(134, 239, 172, .15); border: 1px solid rgba(134, 239, 172, .6); color: var(--ok); }
.error { background: rgba(253, 164, 175, .15); border: 1px solid rgba(253, 164, 175, .6); color: var(--err); }

.footer {
  text-align: center;
  padding: 2.2rem 0;
  color: var(--muted);
  font-size: .85rem;
}

@media (max-width: 900px) {
  .hero-grid,
  .contact-wrap,
  .cards,
  .gallery-grid {
    grid-template-columns: 1fr;
  }

  .menu-btn { display: block; }

  .nav {
    position: absolute;
    right: 4%;
    top: 62px;
    flex-direction: column;
    background: rgba(10, 10, 18, .95);
    border: 1px solid rgba(255, 255, 255, .1);
    border-radius: 12px;
    padding: .7rem;
    display: none;
  }

  .nav.open { display: flex; }
}