/* ============================
   BAKUDAN NETWORK — ポータル（マルチサイト入口）
   キックサイト(gym)のダーク×レッド配色に合わせています
   ============================ */

:root {
  --bg:        rgb(23, 5, 68);
  --bg-deep:   rgb(12, 2, 38);
  --red:       #e8364a;
  --red-lt:    #ff5a6c;
  --steel-lt:  #c2cad9;
  --text:      #eceef2;
  --text-muted:#9aa0b4;
  --border:    rgba(196,202,217,0.16);
  --display:   'Bebas Neue', 'Oswald', sans-serif;
  --serif:     'Oswald', 'Noto Sans JP', sans-serif;
  --sans:      'Noto Sans JP', 'Oswald', sans-serif;
  --ease:      cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

html { font-size: 16px; }

body {
  font-family: var(--sans);
  color: var(--text);
  background: var(--bg-deep);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

/* ── レイアウト ── */
.portal {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 3rem 1.5rem;
  overflow: hidden;
}

/* ── 背景画像 ── */
.portal-bg { position: absolute; inset: 0; z-index: 0; }
.portal-bg-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}
.portal-overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(12,2,38,0.55) 0%, rgba(12,2,38,0.75) 55%, rgba(12,2,38,0.92) 100%),
    radial-gradient(120% 90% at 50% 0%, rgba(23,5,68,0.25), rgba(12,2,38,0.85));
}

/* ── 装飾グロー ── */
.glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(70px);
  opacity: 0.5;
  z-index: 1;
  pointer-events: none;
}
.glow--1 { width: 340px; height: 340px; background: rgba(232,54,74,0.35); top: -80px; right: -60px; }
.glow--2 { width: 300px; height: 300px; background: rgba(90,110,220,0.28); bottom: -90px; left: -70px; }

/* ── 中身 ── */
.portal-inner {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 440px;
  text-align: center;
  animation: fadeUp 0.9s var(--ease) both;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── ヘッダー ── */
.portal-head { margin-bottom: 2.6rem; }

.portal-eyebrow {
  font-family: var(--serif);
  font-size: 12px;
  letter-spacing: 0.4em;
  text-transform: uppercase;
  color: var(--red-lt);
  margin-bottom: 1.1rem;
}

.portal-title { line-height: 1; margin-bottom: 1.1rem; }
.portal-title-en {
  display: block;
  font-family: var(--display);
  font-size: clamp(3rem, 12vw, 4.6rem);
  letter-spacing: 0.04em;
  color: #fff;
  text-shadow: 0 4px 30px rgba(0,0,0,0.4);
}
.portal-title-ja {
  display: block;
  font-family: var(--sans);
  font-weight: 700;
  font-size: clamp(0.85rem, 3.6vw, 1.05rem);
  letter-spacing: 0.16em;
  color: var(--steel-lt);
  margin-top: 0.7rem;
}

.portal-lead {
  font-size: 13.5px;
  color: var(--text-muted);
  letter-spacing: 0.04em;
}

/* ── リンク（縦並び） ── */
.portal-links {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.portal-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.15rem 1.5rem;
  background: rgba(255,255,255,0.045);
  border: 1px solid var(--border);
  border-radius: 3px;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  transition: transform 0.28s var(--ease), border-color 0.28s, background 0.28s, box-shadow 0.28s;
}

.portal-link-main {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.15rem;
  text-align: left;
}
.portal-link-en {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text);
  transition: color 0.28s;
}
.portal-link-ja {
  font-size: 12px;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

.portal-link-arrow {
  font-family: var(--serif);
  font-size: 1.15rem;
  color: var(--red);
  transform: translateX(0);
  transition: transform 0.28s var(--ease), color 0.28s;
}

/* ホバー */
.portal-link:hover {
  transform: translateY(-3px);
  border-color: rgba(232,54,74,0.6);
  background: rgba(232,54,74,0.10);
  box-shadow: 0 12px 34px rgba(0,0,0,0.4), 0 0 22px rgba(232,54,74,0.18);
}
.portal-link:hover .portal-link-en { color: #fff; }
.portal-link:hover .portal-link-arrow { transform: translateX(6px); color: var(--red-lt); }

.portal-link:focus-visible {
  outline: 2px solid var(--red-lt);
  outline-offset: 3px;
}

/* ── フッター ── */
.portal-foot {
  margin-top: 2.8rem;
  font-size: 11px;
  letter-spacing: 0.08em;
  color: rgba(154,160,180,0.7);
}

/* ── レスポンシブ ── */
@media (max-width: 480px) {
  .portal { padding: 2.4rem 1.2rem; }
  .portal-head { margin-bottom: 2rem; }
  .portal-link { padding: 1rem 1.2rem; }
}