:root {
  --bg: #f7f9fc;
  --card-bg: #ffffff;
  --text-dark: #0f172a;
  --text-muted: #64748b;
  --text-body: #475569;
  --blue: #2563eb;
  --blue-strong: #1d4ed8;
  --icon-bg: #e8edfb;
  --badge-bg: #eaf0fd;
  --border: #e6eaf0;
}

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

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: linear-gradient(180deg, #f8fafc 0%, #f3f6fb 100%);
  color: var(--text-dark);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.page {
  max-width: 900px;
  margin: 0 auto;
  padding: 72px 24px 40px;
}

/* Hero */
.hero {
  text-align: center;
  margin-bottom: 56px;
}

.logo {
  font-size: clamp(3.75rem, 12vw, 6.5rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1;
  color: var(--text-dark);
}

.logo-dot,
.logo-io {
  color: var(--blue);
}

.tagline {
  margin-top: 28px;
  font-size: clamp(1.5rem, 4vw, 2.15rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-dark);
}

.subtitle {
  margin: 18px auto 0;
  max-width: 34rem;
  font-size: clamp(1rem, 2.4vw, 1.2rem);
  line-height: 1.6;
  color: var(--text-body);
}

/* Cards */
.cards {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.card {
  display: flex;
  align-items: center;
  gap: 36px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 40px;
  box-shadow: 0 10px 30px -18px rgba(15, 23, 42, 0.18);
}

.card-icon {
  flex-shrink: 0;
  width: 140px;
  height: 140px;
  display: grid;
  place-items: center;
  background: var(--icon-bg);
  border-radius: 20px;
  color: var(--blue);
}

.card-icon svg {
  width: 68px;
  height: 68px;
}

.card-title {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-dark);
}

.card-text {
  margin-top: 10px;
  font-size: 1.0625rem;
  line-height: 1.55;
  color: var(--text-body);
  max-width: 24rem;
}

.card-link {
  display: block;
  margin-top: 20px;
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--blue);
  text-decoration: none;
}

.card-link:hover {
  color: var(--blue-strong);
}

.card-badge {
  display: inline-block;
  margin-top: 20px;
  padding: 8px 16px;
  background: var(--badge-bg);
  border-radius: 10px;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--blue);
  text-decoration: none;
}

.card-badge:hover {
  background: #dde7fc;
}

/* Footer */
.footer {
  margin-top: 48px;
  padding-top: 28px;
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* Mobile */
@media (max-width: 640px) {
  .page {
    padding: 56px 20px 32px;
  }

  .hero {
    margin-bottom: 40px;
  }

  .card {
    flex-direction: column;
    text-align: center;
    gap: 20px;
    padding: 28px 24px;
  }

  .card-icon {
    width: 104px;
    height: 104px;
    border-radius: 16px;
  }

  .card-icon svg {
    width: 52px;
    height: 52px;
  }

  .card-body {
    display: flex;
    flex-direction: column;
    align-items: center;
  }

  .card-text {
    max-width: none;
  }
}