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

:root {
  --bg: #0d0f1a;
  --surface: #151929;
  --surface2: #1c2035;
  --border: #2a3050;
  --accent: #5b8cff;
  --accent-glow: #3a6aff44;
  --text: #e0e4f0;
  --text-muted: #6a7090;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Segoe UI', 'Hiragino Sans', sans-serif;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.lang-toggle {
  position: fixed;
  top: 16px;
  right: 20px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.lang-toggle button {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 5px 12px;
  border-radius: 5px;
  font-size: 0.72rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s;
  letter-spacing: 0.05em;
}

.lang-toggle button.active {
  background: rgba(91, 140, 255, 0.15);
  border-color: var(--accent);
  color: var(--accent);
}

.lang-toggle button:hover:not(.active) {
  border-color: var(--text-muted);
  color: var(--text);
}

.hero {
  text-align: center;
  margin-bottom: 48px;
}

.ghost-icon {
  font-size: 4rem;
  line-height: 1;
  margin-bottom: 16px;
  filter: drop-shadow(0 0 20px #5b8cff88);
}

.hero h1 {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.05em;
  margin-bottom: 8px;
}

.hero p {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.cards {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  justify-content: center;
  max-width: 800px;
  width: 100%;
}

.card {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px 32px;
  text-decoration: none;
  color: var(--text);
  flex: 1;
  min-width: 260px;
  max-width: 340px;
  transition: all 0.2s ease;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.card:hover {
  border-color: var(--accent);
  box-shadow: 0 0 24px var(--accent-glow);
  transform: translateY(-3px);
}

.card-icon {
  font-size: 2.2rem;
  line-height: 1;
}

.card-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--accent);
}

.card-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.card-tag {
  display: inline-block;
  margin-top: auto;
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 0.72rem;
  font-weight: 600;
  align-self: flex-start;
}

.tag-controller {
  background: rgba(91, 140, 255, 0.15);
  border: 1px solid rgba(91, 140, 255, 0.4);
  color: var(--accent);
}

.tag-overlay {
  background: rgba(160, 232, 255, 0.1);
  border: 1px solid rgba(160, 232, 255, 0.3);
  color: #a0e8ff;
}

.setup {
  margin-top: 56px;
  max-width: 800px;
  width: 100%;
}

.setup-title {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.setup-title::before,
.setup-title::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

.setup-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
}

.step-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px 20px;
  display: flex;
  gap: 14px;
}

.step-num {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: rgba(91, 140, 255, 0.15);
  border: 1px solid rgba(91, 140, 255, 0.4);
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 1px;
}

.step-title {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 6px;
}

.step-body {
  font-size: 0.76rem;
  color: var(--text-muted);
  line-height: 1.65;
}

.step-body code {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 5px;
  font-family: 'Consolas', 'Courier New', monospace;
  font-size: 0.72rem;
  color: #a0c8ff;
}

.disclaimer {
  margin-top: 48px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  max-width: 800px;
  width: 100%;
  text-align: center;
}

.disclaimer p {
  font-size: 0.7rem;
  color: var(--text-muted);
  line-height: 1.6;
}