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

:root {
  --bg: #050816;
  --bg-soft: rgba(10, 25, 47, 0.85);
  --card-bg: rgba(15, 32, 60, 0.9);
  --accent: #4fd1c5;
  --accent-soft: rgba(79, 209, 197, 0.1);
  --text: #f9fafb;
  --muted: #9ca3af;
  --border-subtle: rgba(148, 163, 184, 0.25);
  --radius-lg: 20px;
  --shadow-soft: 0 18px 35px rgba(15, 23, 42, 0.7);
  --font-main: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Text",
    "SF Pro Display", "Inter", sans-serif;
}

html,
body {
  height: 100%;
}

body {
  font-family: var(--font-main);
  background: radial-gradient(circle at top, #1f2933 0, #020617 55%);
  color: var(--text);
  display: flex;
  justify-content: center;
  align-items: stretch;
  padding: 24px;
}

/* Layout container */
.page-wrapper {
  width: 100%;
  max-width: 980px;
  margin: auto;
  background: linear-gradient(
    135deg,
    rgba(15, 23, 42, 0.92),
    rgba(15, 23, 42, 0.99)
  );
  border-radius: 28px;
  border: 1px solid rgba(148, 163, 184, 0.35);
  box-shadow: var(--shadow-soft);
  padding: 26px 24px 22px;
  display: flex;
  flex-direction: column;
  gap: 24px;
  backdrop-filter: blur(22px);
}

/* Header */
.site-header {
  display: flex;
  align-items: center;
  gap: 16px;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 16px;
}

.logo-circle {
  width: 48px;
  height: 48px;
  border-radius: 999px;
  background: radial-gradient(circle at 30% 20%, #a5f3fc, #0f172a);
  border: 1px solid rgba(148, 163, 184, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.site-title-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.site-title {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.site-subtitle {
  font-size: 0.9rem;
  color: var(--muted);
}

/* Content */
.content {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

/* Hero section */
.hero {
  background: radial-gradient(circle at top left, #0f172a, #020617);
  border-radius: 22px;
  padding: 18px 18px 16px;
  border: 1px solid rgba(148, 163, 184, 0.4);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: -80px;
  right: -80px;
  width: 180px;
  height: 180px;
  background: radial-gradient(circle, rgba(79, 209, 197, 0.18), transparent);
  opacity: 0.9;
}

.hero h2 {
  font-size: 1.3rem;
  margin-bottom: 8px;
}

.hero p {
  font-size: 0.95rem;
  color: var(--muted);
  max-width: 580px;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 12px;
  padding: 6px 10px;
  border-radius: 14px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 500;
}

/* Cards */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.card {
  background: var(--card-bg);
  border-radius: 18px;
  padding: 14px 14px 12px;
  border: 1px solid rgba(148, 163, 184, 0.35);
  display: flex;
  flex-direction: column;
  gap: 8px;
  box-shadow: 0 10px 22px rgba(15, 23, 42, 0.65);
}

.card h3 {
  font-size: 1rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: #e5e7eb;
}

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

/* Placeholder UI elements */
.placeholder-pill {
  margin-top: 4px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 5px 9px;
  border-radius: 999px;
  border: 1px dashed rgba(148, 163, 184, 0.7);
  font-size: 0.75rem;
  color: var(--muted);
}

.placeholder-box {
  margin-top: 4px;
  border-radius: 12px;
  border: 1px dashed rgba(148, 163, 184, 0.7);
  height: 70px;
  background: radial-gradient(
    circle at center,
    rgba(15, 23, 42, 0.7),
    transparent
  );
}

.placeholder-list {
  list-style: none;
  font-size: 0.85rem;
  color: var(--muted);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.placeholder-list li::before {
  content: "·";
  margin-right: 6px;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border-subtle);
  padding-top: 12px;
  font-size: 0.8rem;
  color: var(--muted);
  text-align: right;
}

/* Responsive */
@media (max-width: 768px) {
  body {
    padding: 12px;
  }

  .page-wrapper {
    padding: 18px 16px 16px;
    border-radius: 22px;
  }

  .site-header {
    flex-direction: row;
    align-items: center;
  }

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

  .hero {
    padding: 16px 14px 14px;
  }
}