/* =========================================
   946-WEB STUDIO 公式スタイルシート 完全版
   ========================================= */

/* カラーテーマ */
:root {
  --bg-color: #05060a;
  --bg-alt: #0b0d14;
  --accent: #00e0ff;
  --accent-soft: rgba(0, 224, 255, 0.15);
  --text-main: #f5f7ff;
  --text-sub: #9aa0b5;
  --border-soft: #1b1f2b;
  --radius: 10px;
  --shadow-soft: 0 18px 45px rgba(0, 0, 0, 0.65);
}

/* リセット */
*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: radial-gradient(circle at top, #151a2b 0, #05060a 55%);
  color: var(--text-main);
}

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

.wrapper {
  max-width: 1080px;
  margin: 0 auto;
  padding: 24px 20px 60px;
}

/* =========================================
   HEADER
   ========================================= */

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  margin-bottom: 32px;
  border-radius: 999px;
  background: rgba(5, 6, 10, 0.9);
  border: 1px solid var(--border-soft);
  backdrop-filter: blur(18px);
  position: sticky;
  top: 16px;
  z-index: 50;
}

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

.brand-mark {
  width: 32px;
  height: 32px;
  border-radius: 10px;
  background: radial-gradient(circle at 20% 0, #00e0ff, #0066ff);
  box-shadow: 0 0 18px rgba(0, 224, 255, 0.7);
}

.brand-text-main {
  font-size: 15px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

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

/* PCナビ */
.nav {
  display: flex;
  gap: 18px;
  font-size: 13px;
}

.nav a {
  padding: 6px 10px;
  border-radius: 999px;
  color: var(--text-sub);
  transition: 0.2s ease;
}

.nav a:hover,
.nav a.is-active {
  color: var(--text-main);
  background: var(--accent-soft);
}

/* =========================================
   ハンバーガーメニュー（スマホ用）
   ========================================= */

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  z-index: 100;
}

.hamburger span {
  width: 26px;
  height: 3px;
  background: var(--text-main);
  border-radius: 3px;
  transition: 0.3s;
}

/* 開いた時のアニメーション */
.hamburger.active span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}
.hamburger.active span:nth-child(2) {
  opacity: 0;
}
.hamburger.active span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* スマホ時のメニュー展開 */
.nav.open {
  display: flex;
  flex-direction: column;
  position: absolute;
  top: 70px;
  right: 20px;
  background: rgba(5, 6, 10, 0.95);
  border: 1px solid var(--border-soft);
  border-radius: 16px;
  padding: 14px 20px;
  gap: 14px;
  box-shadow: var(--shadow-soft);
}

/* =========================================
   HERO / MAIN BLOCKS
   ========================================= */

.hero {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 2.2fr);
  gap: 26px;
  margin-bottom: 32px;
}

.card {
  background: linear-gradient(135deg, rgba(0, 224, 255, 0.06), rgba(0, 0, 0, 0.9));
  border-radius: 22px;
  border: 1px solid var(--border-soft);
  box-shadow: var(--shadow-soft);
  padding: 22px 22px 20px;
  position: relative;
  overflow: hidden;
}

.card::before {
  content: "";
  position: absolute;
  inset: -40%;
  background: radial-gradient(circle at 0 0, rgba(0, 224, 255, 0.12), transparent 55%);
  opacity: 0.7;
  pointer-events: none;
}

.card-title {
  font-size: 26px;
  margin-bottom: 10px;
}

.card-tagline {
  font-size: 13px;
  color: var(--text-sub);
  margin-bottom: 18px;
}

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}

.chip {
  font-size: 11px;
  padding: 5px 10px;
  border-radius: 999px;
  border: 1px solid rgba(0, 224, 255, 0.4);
  background: rgba(0, 0, 0, 0.4);
}

.hero-highlight {
  font-size: 12px;
  color: var(--accent);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.hero-main-copy {
  font-size: 18px;
  line-height: 1.6;
  margin-bottom: 16px;
}

.hero-sub-copy {
  font-size: 13px;
  color: var(--text-sub);
}

/* =========================================
   GRID SECTIONS
   ========================================= */

.section {
  margin-top: 40px;
}

.section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 18px;
}

.section-title {
  font-size: 18px;
}

.section-sub {
  font-size: 12px;
  color: var(--text-sub);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 18px;
}

.tile {
  background: var(--bg-alt);
  border-radius: 16px;
  border: 1px solid var(--border-soft);
  padding: 16px 16px 14px;
}

.tile-label {
  font-size: 11px;
  color: var(--accent);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  margin-bottom: 6px;
}

.tile-title {
  font-size: 15px;
  margin-bottom: 6px;
}

.tile-body {
  font-size: 13px;
  color: var(--text-sub);
}

/* =========================================
   CONTACT FORM
   ========================================= */

.form {
  display: grid;
  gap: 14px;
  max-width: 520px;
}

.form-row {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-label {
  font-size: 12px;
  color: var(--text-sub);
}

.form-input,
.form-textarea {
  border-radius: 10px;
  border: 1px solid var(--border-soft);
  background: rgba(5, 6, 10, 0.9);
  color: var(--text-main);
  padding: 10px 12px;
  font-size: 13px;
}

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

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 9px 18px;
  border-radius: 999px;
  border: none;
  cursor: pointer;
  font-size: 13px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  background: linear-gradient(135deg, #00e0ff, #0066ff);
  color: #020308;
  box-shadow: 0 12px 30px rgba(0, 224, 255, 0.45);
}

.btn-primary:hover {
  filter: brightness(1.05);
}

/* =========================================
   FOOTER
   ========================================= */

.site-footer {
  margin-top: 40px;
  padding-top: 18px;
  border-top: 1px solid var(--border-soft);
  font-size: 11px;
  color: var(--text-sub);
  display: flex;
  justify-content: space-between;
  gap: 10px;
}

/* =========================================
   RESPONSIVE
   ========================================= */

@media (max-width: 768px) {
  .site-header {
    border-radius: 18px;
  }

  .hero {
    grid-template-columns: 1fr;
  }

  /* PCナビ非表示 → ハンバーガー表示 */
  .nav {
    display: none;
  }

  .hamburger {
    display: flex;
  }
}