:root {
  --bg-dark: #0c0c0e;
  --bg-accent: #200404;
  --card-bg: rgba(255, 255, 255, 0.06);
  --border: rgba(255, 255, 255, 0.1);
  --text: #fff;
  --muted: #bbb;
  --highlight: #ff4444;
}

body {
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial;
  color: var(--text);
  background:
    linear-gradient(160deg, var(--bg-dark) 0%, var(--bg-accent) 100%),
    url('https://cdn.jsdelivr.net/gh/konpa/devicon@master/icons/carbon/carbon-original.svg') center/8% repeat,
    url('https://www.transparenttextures.com/patterns/carbon-fibre-big.png');
  background-blend-mode: overlay;
  max-width: auto;
  margin: 0 auto;
  padding: 20px;
  min-height: 80vh;
  display: flex;
  flex-direction: column;
}

h1 {
  text-align: center;
  font-size: 1.6rem;
  margin-bottom: 12px;
  color: #fff;
  letter-spacing: 0.5px;
}

h2 {
  font-size: 1.1rem;
  margin: 10px 0 4px;
  color: #fff;
}

.packs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  flex-grow: 1;
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  backdrop-filter: blur(8px);
}

label {
  display: block;
  margin: 8px 0 4px;
  color: var(--highlight);
  font-weight: 600;
}

input[type=number] {
  width: 120px;
  padding: 6px;
  border-radius: 6px;
  border: 1px solid #444;
  background: #111;
  color: #fff;
}

input[readonly] {
  background: #111;
  color: #888;
  cursor: not-allowed;
}

.row {
  display: flex;
  gap: 12px;
  align-items: center;
  margin-bottom: 8px;
  flex-wrap: wrap;
}

.actions {
  margin-top: 8px;
}

button {
  padding: 8px 10px;
  border-radius: 6px;
  border: 1px solid #666;
  background: #222;
  color: #fff;
  cursor: pointer;
}

button:hover {
  background: #333;
}

.out {
  background: #111;
  padding: 10px;
  border-radius: 8px;
  margin-top: 10px;
  border: 1px solid #333;
}

.small {
  color: var(--muted);
  font-size: 0.9rem;
}

.bp-hint {
  margin-left: 50px;
  display: inline-block;
}

.input-with-unit { position: relative; display: inline-block; }
.input-with-unit input { padding-right: 44px; box-sizing: border-box; }
.input-with-unit .unit { position: absolute; right: 8px; top: 50%; transform: translateY(-50%); color: var(--muted); font-size: 0.9rem; pointer-events: none; }

.banner {
  margin: 12px 0 18px;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.06);
  align-items: center;
  justify-content: center;
  display: flex;
}

.banner img {
  display: block;
  width: 80%;
  max-height: 200px;
}

footer {
  text-align: center;
  margin-top: 24px;
  padding: 10px;
  font-size: 0.95rem;
  color: var(--muted);
}

footer a {
  color: #7289da;
  text-decoration: none;
  font-weight: 600;
  transition: color 0.2s;
}

footer a:hover { color: #9baaf1; }

/* Keep YouTube link/icon red (override generic footer hover) */
footer a.youtube { color: var(--highlight); }
footer a.youtube:hover { color: var(--highlight); }

.youtube-logo { fill: currentColor; }

@media (max-width:800px) {
  .packs { grid-template-columns: 1fr; }
  input[type=number] { width: 100%; }
}