:root {
  color-scheme: dark;
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --surface: rgba(10, 14, 39, 0.92);
  --surface-strong: rgba(5, 8, 26, 0.98);
  --surface-soft: rgba(19, 28, 62, 0.72);
  --border: rgba(255, 255, 255, 0.1);
  --text-primary: #eef2ff;
  --text-secondary: #a5b4fc;
  --accent: #25e0ff;
  --accent-soft: rgba(37, 224, 255, 0.14);
  --muted: #8b95b8;
  --success: #4ade80;
  --warning: #ffb648;
  --error: #fb7185;
  --shadow: 0 30px 90px rgba(5, 10, 30, 0.35);
}

body {
  margin: 0;
  min-height: 100vh;
  background: radial-gradient(circle at top left, rgba(37, 224, 255, 0.12), transparent 25%),
    radial-gradient(circle at bottom right, rgba(99, 102, 241, 0.16), transparent 20%),
    linear-gradient(135deg, #030517 0%, #0c1737 100%);
  color: var(--text-primary);
}

* {
  box-sizing: border-box;
}

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

button,
input,
select {
  font: inherit;
}

.app-shell {
  width: min(1260px, 100%);
  margin: 0 auto;
  padding: 32px 28px 48px;
}

.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 24px 28px;
  background: rgba(8, 12, 28, 0.85);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 24px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.header h1 {
  margin: 0;
  font-size: clamp(1.9rem, 2.4vw, 2.6rem);
  letter-spacing: -0.03em;
}

.header-meta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  align-items: center;
}

.user-pill,
.login-pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 18px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.user-pill strong {
  color: var(--accent);
}

.hero {
  margin: 32px 0;
  display: grid;
  gap: 20px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 24px;
}

.hero-card,
.feature-card,
.stats-card,
.activity-card,
.module-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 28px;
  padding: 28px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.hero-card h2,
.feature-card h3,
.stats-card h3,
.module-card h3 {
  margin: 0 0 16px;
}

.hero-card p,
.feature-card p,
.stats-card p,
.module-card p {
  margin: 0;
  color: var(--text-secondary);
  line-height: 1.7;
}

.greeting-row {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 18px;
}

.greeting-row h2 {
  margin: 0;
  font-size: clamp(2.2rem, 3.2vw, 3rem);
  line-height: 1.05;
}

.stats-grid,
.modules-grid,
.activity-grid {
  display: grid;
  gap: 20px;
}

.stats-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.stats-card {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.stats-pill {
  align-self: flex-start;
  padding: 8px 14px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.92rem;
  font-weight: 700;
}

.module-card {
  display: grid;
  gap: 16px;
}

.module-card .module-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.btn-primary,
.btn-secondary,
.btn-tertiary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  border: none;
  border-radius: 999px;
  padding: 14px 20px;
  cursor: pointer;
  transition: transform 0.2s ease, background-color 0.2s ease, box-shadow 0.2s ease;
}

.btn-primary {
  background: linear-gradient(135deg, #25e0ff, #9a6bff);
  color: #0f172a;
  box-shadow: 0 20px 50px rgba(37, 224, 255, 0.18);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-primary);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.btn-tertiary {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.btn-primary:hover,
.btn-secondary:hover,
.btn-tertiary:hover {
  transform: translateY(-2px);
}

.module-card .module-actions button {
  flex: 1;
  min-width: 160px;
}

.activity-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.activity-feed {
  display: grid;
  gap: 16px;
}

.activity-item {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 16px;
  align-items: center;
  padding: 18px;
  border-radius: 20px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.04);
}

.activity-icon {
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  font-size: 1.4rem;
  border-radius: 16px;
  background: rgba(37, 224, 255, 0.16);
}

.activity-title {
  font-weight: 700;
  color: var(--text-primary);
}

.activity-meta {
  color: var(--text-secondary);
  font-size: 0.94rem;
}

.activity-time {
  color: var(--text-secondary);
  white-space: nowrap;
}

.module-card h3 {
  font-size: 1.1rem;
}

.footer {
  margin-top: 42px;
  text-align: center;
  color: var(--muted);
}

@media (max-width: 1024px) {
  .hero-grid,
  .stats-grid,
  .modules-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .header,
  .hero-card,
  .feature-card,
  .stats-card,
  .activity-card,
  .module-card {
    padding: 22px;
  }

  .header {
    flex-direction: column;
    align-items: stretch;
  }

  .greeting-row {
    flex-direction: column;
    align-items: flex-start;
  }
}