/* hub.css — スカイガレオン・ポータル専用スタイル */

@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@400;700;900&family=Outfit:wght@400;700;800&display=swap');

:root {
  --bg-color: #05070a;
  --accent-primary: #6366f1;
  --accent-secondary: #c084fc;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --glass-bg: rgba(15, 23, 42, 0.6);
  --glass-border: rgba(255, 255, 255, 0.08);
  --transition: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
}

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

body {
  font-family: 'Outfit', 'Noto Sans JP', sans-serif;
  background-color: var(--bg-color);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  overflow-x: hidden;
}

/* Background Logic */
#hub-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: -2;
  filter: brightness(0.6) saturate(1.2);
}

#hub-bg-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at center, transparent 0%, var(--bg-color) 80%);
  z-index: -1;
}

/* Container */
.container {
  width: 100%;
  max-width: 1200px;
  padding: 40px 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  animation: fadeIn 1s ease-out;
}

header {
  text-align: center;
  margin-bottom: 60px;
}

header h1 {
  font-size: 3.5rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: linear-gradient(to right, #fff, var(--accent-secondary), var(--accent-primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 10px;
  filter: drop-shadow(0 0 20px rgba(99, 102, 241, 0.3));
}

header p {
  color: var(--text-muted);
  font-size: 1.1rem;
  letter-spacing: 0.2em;
}

/* Card Grid */
.mode-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 30px;
  width: 100%;
}

.mode-card {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: 24px;
  padding: 40px;
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.mode-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, transparent, rgba(99, 102, 241, 0.1), transparent);
  transform: translateX(-100%);
  transition: var(--transition);
}

.mode-card:hover {
  transform: translateY(-12px);
  border-color: var(--accent-primary);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4), 0 0 20px rgba(99, 102, 241, 0.2);
}

.mode-card:hover::before {
  transform: translateX(100%);
}

.mode-icon {
  font-size: 4rem;
  margin-bottom: 24px;
  filter: drop-shadow(0 0 10px rgba(255, 255, 255, 0.2));
  transition: var(--transition);
}

.mode-card:hover .mode-icon {
  transform: scale(1.1) rotate(5deg);
}

.mode-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: #fff;
}

.mode-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 24px;
}

.mode-status {
  margin-top: auto;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 6px 16px;
  border-radius: 100px;
  background: rgba(255, 255, 255, 0.05);
  color: var(--accent-secondary);
  border: 1px solid rgba(192, 132, 252, 0.2);
}

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Footer */
footer {
  margin-top: 80px;
  font-size: 0.85rem;
  color: #475569;
  letter-spacing: 0.1em;
}

/* Responsive */
@media (max-width: 768px) {
  header h1 { font-size: 2.2rem; }
  .mode-grid { grid-template-columns: 1fr; }
}