/* Kostin Group apex portal — static, dark, responsive. No external fonts/assets. */

:root {
  --bg-0: #0a0e1a;
  --bg-1: #111827;
  --card: rgba(255, 255, 255, 0.04);
  --card-hover: rgba(255, 255, 255, 0.07);
  --border: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(129, 140, 248, 0.55);
  --text: #f3f4f6;
  --muted: #9ca3af;
  --accent: #818cf8;
  --accent-2: #22d3ee;
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica,
    Arial, "Apple Color Emoji", "Segoe UI Emoji", sans-serif;
  background:
    radial-gradient(1200px 800px at 15% -10%, rgba(129, 140, 248, 0.20), transparent 60%),
    radial-gradient(1000px 700px at 110% 110%, rgba(34, 211, 238, 0.16), transparent 55%),
    linear-gradient(160deg, var(--bg-0) 0%, var(--bg-1) 100%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.wrap {
  min-height: 100%;
  max-width: 900px;
  margin: 0 auto;
  padding: clamp(2rem, 6vw, 5rem) clamp(1.25rem, 5vw, 2.5rem);
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: clamp(2rem, 5vw, 3.5rem);
}

/* ── Hero ─────────────────────────────────────────────────────────────── */
.hero { text-align: center; }

.mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  margin-bottom: 1.25rem;
  border-radius: 18px;
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: 0.02em;
  color: #0a0e1a;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
  box-shadow: 0 10px 30px rgba(129, 140, 248, 0.35);
}

.hero h1 {
  margin: 0;
  font-size: clamp(2rem, 6vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(90deg, #ffffff 0%, #c7d2fe 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.tagline {
  margin: 0.5rem 0 0;
  color: var(--muted);
  font-size: clamp(0.95rem, 2.5vw, 1.1rem);
}

/* ── Cards ────────────────────────────────────────────────────────────── */
.cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: clamp(1rem, 3vw, 1.5rem);
}

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  padding: clamp(1.5rem, 4vw, 2rem);
  border-radius: 20px;
  text-decoration: none;
  color: var(--text);
  background: var(--card);
  border: 1px solid var(--border);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: transform 0.18s ease, background 0.18s ease,
    border-color 0.18s ease, box-shadow 0.18s ease;
}

.card:hover,
.card:focus-visible {
  transform: translateY(-4px);
  background: var(--card-hover);
  border-color: var(--border-hover);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.35);
  outline: none;
}

.card__icon { font-size: 2rem; line-height: 1; }

.card__title {
  font-size: 1.35rem;
  font-weight: 650;
  letter-spacing: -0.01em;
}

.card__desc {
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.4;
}

.card__go {
  margin-top: 0.75rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--accent);
}

/* ── Footer ───────────────────────────────────────────────────────────── */
.foot {
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
}

/* ── Responsive: stack cards on narrow screens ────────────────────────── */
@media (max-width: 560px) {
  .cards { grid-template-columns: 1fr; }
}

/* Respect reduced-motion. */
@media (prefers-reduced-motion: reduce) {
  .card { transition: none; }
  .card:hover, .card:focus-visible { transform: none; }
}