* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "YuGothic", "Yu Gothic", "Meiryo", sans-serif;
  background-color: #1f1f1f;
  color: #ffffff;
  line-height: 1.8;
  min-height: 100vh;
  position: relative;
}

/* === 背景：暗いグレー + 中央にファッション画線画 === */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background: #1b1b1b;  /* 濃いグレーのベタ */
  z-index: -3;
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  background-size: cover;
  background: url("images/design-bg.png") no-repeat center center;
       /* 中央に大きめで配置 */
  opacity: 0.22;            /* 薄く透かす */
  filter: contrast(120%) brightness(90%);
  z-index: -2;
}

a {
  color: #ffffff;
  text-decoration: none;
}

header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(12,12,12,0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.nav-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  letter-spacing: 0.08em;
}

.logo-mark {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: 2px solid #ffffff;
  position: relative;
}

.logo-mark::before,
.logo-mark::after {
  content: "";
  position: absolute;
  inset: 5px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.7);
}

.logo-mark::after {
  inset: 11px 7px;
  border-radius: 999px;
  border-top: none;
  border-left: none;
}

.logo-text-main {
  font-size: 0.9rem;
}

.logo-text-sub {
  font-size: 0.6rem;
  opacity: 0.7;
}

nav ul {
  list-style: none;
  display: flex;
  gap: 20px;
  font-size: 0.9rem;
}

nav li a {
  position: relative;
  padding-bottom: 4px;
}

nav li a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 1px;
  background: #ffffff;
  transition: width 0.2s ease;
}

nav li a:hover::after {
  width: 100%;
}

.menu-toggle {
  display: none;
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: #ffffff;
  margin: 4px 0;
}

/* hero */

.hero {
  max-width: 1100px;
  margin: 0 auto;
  padding: 32px 20px 40px;
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 2.6fr);
  gap: 26px;
  align-items: center;
}

.hero-copy h1 {
  font-size: 1.9rem;
  margin-bottom: 14px;
}

.hero-copy h1 span {
  font-size: 0.9rem;
  display: block;
  letter-spacing: 0.3em;
  opacity: 0.8;
  margin-bottom: 4px;
}

.hero-lead {
  font-size: 0.98rem;
  opacity: 0.92;
  margin-bottom: 14px;
}

.hero-tags {
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  opacity: 0.7;
  margin-bottom: 18px;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 18px;
  border-radius: 999px;
  font-size: 0.85rem;
  border: 1px solid rgba(255,255,255,0.6);
  background: transparent;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease, transform 0.1s ease, box-shadow 0.15s ease;
}

.btn-primary {
  background: linear-gradient(135deg, #ffffff, #bfbfbf);
  color: #101010;
  border-color: transparent;
  box-shadow: 0 8px 18px rgba(0,0,0,0.55);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 24px rgba(0,0,0,0.7);
}

.btn-outline:hover {
  background: rgba(255,255,255,0.12);
}

.hero-image {
  border-radius: 18px;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.12);
  box-shadow: 0 15px 36px rgba(0,0,0,0.85);
}

.hero-image img {
  width: 100%;
  display: block;
}

/* generic layout */

main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 10px 20px 40px;
}

.section {
  margin-top: 40px;
}

.section-title {
  font-size: 1.2rem;
  margin-bottom: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  opacity: 0.85;
}

.section h2 {
  font-size: 1.35rem;
  margin-bottom: 16px;
}

.section p + p {
  margin-top: 8px;
}

.section-list {
  margin-top: 12px;
  padding-left: 1.2em;
  font-size: 0.97rem;
}

.section-list li + li {
  margin-top: 5px;
}

.section-note {
  font-size: 0.82rem;
  opacity: 0.75;
  margin-top: 10px;
}

/* layout helpers */
.twocol {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 1.3fr);
  gap: 26px;
  align-items: flex-start;
}

.twocol > div {
  min-width: 0;
}

/* contact */

.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1.4fr);
  gap: 26px;
}

.contact-info dt {
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  opacity: 0.7;
}

.contact-info dd {
  margin-bottom: 10px;
}

.contact-form label {
  font-size: 0.8rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  opacity: 0.8;
  display: block;
  margin-bottom: 4px;
}

.contact-form input,
.contact-form textarea,
.contact-form select {
  width: 100%;
  border: none;
  border-bottom: 1px solid rgba(255,255,255,0.4);
  background: transparent;
  color: #ffffff;
  padding: 7px 0 6px;
  font-size: 0.9rem;
  margin-bottom: 16px;
}

.contact-form textarea {
  min-height: 120px;
  resize: vertical;
}

.contact-form input:focus,
.contact-form textarea:focus,
.contact-form select:focus {
  outline: none;
  border-bottom-color: #ffffff;
}

/* footer */

footer {
  border-top: 1px solid rgba(255,255,255,0.08);
  margin-top: 40px;
  padding: 18px 20px 26px;
  font-size: 0.78rem;
  opacity: 0.75;
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: space-between;
}

/* responsive */

@media (max-width: 860px) {
  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
  }
  .hero-image {
    order: -1;
  }
  .twocol,
  .contact-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 720px) {
  nav ul {
    position: fixed;
    right: 0;
    top: 52px;
    flex-direction: column;
    background: rgba(10,10,10,0.98);
    padding: 14px 20px 16px;
    gap: 12px;
    width: min(220px, 70vw);
    max-height: 0;
    overflow: hidden;
    border-left: 1px solid rgba(255,255,255,0.08);
    border-bottom: 1px solid rgba(255,255,255,0.08);
    transform-origin: top;
    transition: max-height 0.18s ease;
  }

  nav ul.open {
    max-height: 260px;
  }

  .menu-toggle {
    display: block;
  }
}

@media (max-width: 520px) {
  .hero-copy h1 {
    font-size: 1.5rem;
  }
}