/* ==========================================================
   depth studio サイト - 共通スタイル
   Tailwindで表現しにくいスタイルのみ記述
   ========================================================== */

html { scroll-behavior: smooth; scroll-padding-top: 8rem; }
body { font-family: 'Noto Sans JP', sans-serif; -webkit-font-smoothing: antialiased; }

.logo-helv {
  font-family: "Helvetica Neue", Helvetica, Arial, "Liberation Sans", sans-serif;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1;
}

.nav-link { position: relative; }
.nav-link::after { content:''; position:absolute; left:0; bottom:-6px; height:2px; width:0; background:#2f7bff; transition:width .3s ease; }
.nav-link:hover::after { width:100%; }
.nav-link.is-current::after { width:100%; }

/* 紺の見出し帯：左上は深い紺、右へ向かって明るくなり、図形の背後にほのかな青い光 */
.hero-navy {
  background:
    radial-gradient(ellipse 55% 75% at 80% 40%, rgba(47,123,255,.30) 0%, rgba(47,123,255,0) 70%),
    radial-gradient(ellipse 45% 55% at 0% 0%, rgba(106,163,255,.14) 0%, rgba(106,163,255,0) 70%),
    linear-gradient(135deg, #050d1f 0%, #0a1a3a 46%, #12306b 100%);
}
/* 紺の上に重ねる、ごく薄い格子（コーポレートサイトの格子の、暗い面向け） */
.hero-grid-dark {
  background-image:
    linear-gradient(rgba(255,255,255,0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.045) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse at 72% 40%, #000 12%, transparent 72%);
  -webkit-mask-image: radial-gradient(ellipse at 72% 40%, #000 12%, transparent 72%);
}

/* お問い合わせページの見出しの背景（コーポレートサイトと同じ） */
.hero-grid {
  background-image:
    linear-gradient(rgba(10,26,58,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(10,26,58,0.05) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse at 30% 40%, #000 20%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at 30% 40%, #000 20%, transparent 75%);
}

/* 折りたたみ（機材一覧） */
details > summary { list-style:none; cursor:pointer; }
details > summary::-webkit-details-marker { display:none; }
details[open] .fold-icon { transform: rotate(45deg); }
.fold-icon { transition: transform .25s ease; }

/* 比較表・料金表 */
.spec-table th, .spec-table td { vertical-align: top; }

/* キーボードフォーカスを見えるように */
a:focus-visible, button:focus-visible, summary:focus-visible {
  outline: 2px solid #2f7bff;
  outline-offset: 3px;
  border-radius: 4px;
}

/* 画像の読み込み前も枠を保つ */
.ph { background-color: #e2e8f0; }

/* TOPヒーローのREC表示 */
.tally { animation: tally 2.6s ease-in-out infinite; }
@keyframes tally { 0%, 100% { opacity: 1; } 50% { opacity: .25; } }

@media (prefers-reduced-motion: reduce) {
  .tally { animation: none; }
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}