:root {
  --bg-body-end: #080c14;
  --bg-gradient-color: #1b2a4a;
  --bg-gradient-x: 65%;
  --bg-gradient-y: 5%;
  --bg-panel: rgba(18, 24, 40, 0.85);
  --bg-card: #161b2e;
  --bg-card-hover: #1e2540;
  --badge-gradient-start: #1e3a5f;
  --badge-gradient-end: #2a5080;
  --border-subtle: rgba(99, 120, 178, 0.22);
  --border-hover: rgba(102, 192, 244, 0.45);
  --color-accent: #66c0f4;
  --color-text: #c6d4df;
  --color-muted: #7a8ea0;
  --color-error: #ff7b7b;
  --shadow-card: 0 2px 12px rgba(0, 0, 0, 0.4);
  --radius-card: 0.75rem;
  --radius-input: 999px;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: system-ui, -apple-system, sans-serif;
  background:
    radial-gradient(ellipse at var(--bg-gradient-x) var(--bg-gradient-y), var(--bg-gradient-color) 0%, transparent 60%),
    linear-gradient(180deg, #0f1624 0%, var(--bg-body-end) 100%);
  color: var(--color-text);
}

main {
  width: min(960px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 3rem 0 4rem;
}

.panel {
  background: var(--bg-panel);
  border: 1px solid var(--border-subtle);
  border-radius: 1.25rem;
  padding: 2.5rem 2rem;
  backdrop-filter: blur(8px);
  box-shadow: 0 4px 32px rgba(0, 0, 0, 0.5);
}

h1 {
  text-align: center;
  font-size: clamp(1.8rem, 5vw, 2.8rem);
  margin: 0 0 0.4rem;
  color: #ffffff;
  letter-spacing: -0.02em;
}

.subtitle {
  text-align: center;
  color: var(--color-muted);
  font-size: 0.95rem;
  margin: 0 0 2rem;
}

input {
  display: block;
  width: min(420px, 100%);
  box-sizing: border-box;
  margin: 0 auto 2.5rem;
  padding: 0.8rem 1.2rem;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-input);
  background: rgba(8, 12, 22, 0.75);
  color: #e8f0f8;
  font-size: 1rem;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

input:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(102, 192, 244, 0.18);
}

#links {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem;
}

.link-card {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.2rem;
  border-radius: var(--radius-card);
  border: 1px solid var(--border-subtle);
  background: var(--bg-card);
  color: var(--color-accent);
  text-decoration: none;
  font-size: 1rem;
  font-weight: 600;
  transition: background 0.18s, border-color 0.18s, transform 0.18s, box-shadow 0.18s;
  box-shadow: var(--shadow-card);
}

.link-card:hover,
.link-card:focus-visible {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.5);
  outline: none;
}

.link-badge {
  flex-shrink: 0;
  width: 2.2rem;
  height: 2.2rem;
  border-radius: 0.45rem;
  background: linear-gradient(135deg, var(--badge-gradient-start), var(--badge-gradient-end));
  color: var(--color-accent);
  font-size: 0.78rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.state-message {
  text-align: center;
  color: var(--color-muted);
  padding: 2rem 0;
  font-size: 0.95rem;
}

.error {
  color: var(--color-error);
  text-align: center;
  padding: 2rem 0;
}

@media (max-width: 480px) {
  .panel {
    padding: 1.5rem 1rem;
  }

  #links {
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  }
}