:root {
  --bg: #050814;
  --bg-alt: #090d1f;
  --accent: #5b8dff;
  --accent-2: #ff6fd8;
  --text-main: #f7f8ff;
  --text-soft: #a7b0d9;
  --card-bg: rgba(9, 13, 31, 0.96);
  --border-soft: rgba(255, 255, 255, 0.08);
  --shadow-soft: 0 24px 60px rgba(0, 0, 0, 0.75);
  --radius-lg: 22px;
  --radius-pill: 999px;
  --transition-fast: 0.18s ease-out;
  --transition-med: 0.28s ease-out;
}

/* LIGHT THEME */
body.light {
  --bg: #f5f7ff;
  --bg-alt: #ffffff;
  --accent: #3056ff;
  --accent-2: #ff4fa3;
  --text-main: #111322;
  --text-soft: #4c5575;
  --card-bg: #ffffff;
  --border-soft: rgba(0, 0, 0, 0.06);
  --shadow-soft: 0 18px 40px rgba(15, 23, 42, 0.18);
}

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

body.page-body {
  margin: 0;
  min-height: 100vh;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Text",
    "Segoe UI", sans-serif;
  background: radial-gradient(circle at top left, #111633 0, #050814 55%, #02030a 100%);
  color: var(--text-main);
}

/* THEME TOGGLE */
.theme-toggle {
  position: fixed;
  top: 18px;
  right: 22px;
  z-index: 50;
  border: 1px solid var(--border-soft);
  background: linear-gradient(135deg, var(--bg-alt), var(--bg));
  color: var(--text-main);
  border-radius: var(--radius-pill);
  padding: 6px 12px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  box-shadow: var(--shadow-soft);
  backdrop-filter: blur(16px);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast),
    border-color var(--transition-fast), background var(--transition-med);
}

.theme-toggle:hover {
  transform: translateY(-1px);
  box-shadow: 0 26px 70px rgba(0, 0, 0, 0.75);
  border-color: rgba(91, 141, 255, 0.25);
}

.moon,
.sun {
  font-size: 16px;
}

/* HERO */
.hero {
  padding: 80px 24px 30px;
  text-align: center;
}

.title {
  margin: 0 0 12px;
  font-size: 2.3rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  display: inline-block;
  padding: 12px 26px;
  border-radius: var(--radius-pill);
  background: linear-gradient(
      135deg,
      rgba(91, 141, 255, 0.22),
      rgba(255, 111, 216, 0.18)
    );
  border: 1px solid rgba(255, 255, 255, 0.16);
  box-shadow: var(--shadow-soft);
  backdrop-filter: blur(18px);
}

.subtitle {
  margin: 0 auto;
  max-width: 780px;
  font-size: 0.96rem;
  color: var(--text-soft);
  line-height: 1.6;
}

/* GRID */
.grid {
  max-width: 1120px;
  margin: 0 auto 50px;
  padding: 10px 24px 40px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.card {
  text-decoration: none;
  color: inherit;
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: 18px 18px 20px;
  border: 1px solid var(--border-soft);
  box-shadow: var(--shadow-soft);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: transform var(--transition-med), box-shadow var(--transition-med),
    border-color var(--transition-med), background var(--transition-med);
}

.card::before {
  content: "";
  position: absolute;
  inset: -40%;
  background: radial-gradient(circle at top, rgba(91, 141, 255, 0.25), transparent 60%);
  opacity: 0;
  transition: opacity var(--transition-med);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.85);
  border-color: rgba(91, 141, 255, 0.25);
}

.card:hover::before {
  opacity: 1;
}

.icon {
  width: 40px;
  height: 40px;
  border-radius: 14px;
  background: radial-gradient(circle at 30% 0%, var(--accent), var(--accent-2));
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  margin-bottom: 6px;
  color: #ffffff;
}

.card h3 {
  margin: 0;
  font-size: 1.02rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.card p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-soft);
  line-height: 1.5;
}

/* FOOTER */
.footer {
  text-align: center;
  padding: 0 24px 30px;
  color: var(--text-soft);
  font-size: 0.9rem;
}

.footer strong {
  color: var(--accent-2);
}

/* RESPONSIVE */
@media (max-width: 960px) {
  .grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .hero {
    padding-top: 70px;
  }

  .title {
    font-size: 1.8rem;
    padding: 10px 20px;
  }

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