/* CSS ไฮเทค โทนดำ-น้ำเงิน */
:root {
  --bg-dark: #0b0c10;
  --bg-gradient: linear-gradient(135deg, #1f2833, #0b0c10);
  --accent: #66fcf1;
  --text-light: #c5c6c7;
  --card-bg: rgba(11, 12, 16, 0.8);
  --shadow: 0 4px 15px rgba(0, 255, 255, 0.2);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html, body {
  font-family: 'Orbitron', sans-serif;
  background: var(--bg-gradient);
  color: var(--text-light);
  min-height: 100vh;
}
.container { max-width: 1200px; margin: 0 auto; padding: 1rem; }
.header { text-align: center; padding: 1rem 0; }
.header h1 { font-size: 2rem; color: var(--accent); text-shadow: 0 0 10px var(--accent); }
.stock-card {
  background: var(--card-bg); border-radius: 12px; box-shadow: var(--shadow);
  overflow: hidden; display: flex; flex-direction: column; transition: transform 0.3s;
}
.stock-card:hover { transform: translateY(-5px); }
.stock-card img { width: 100%; height: 180px; object-fit: cover; }
.stock-card .info { padding: 1rem; flex: 1; }
.stock-card .info h2 { font-size: 1.25rem; color: var(--accent); margin-bottom: 0.5rem; }
.stock-card .info p { font-size: 0.9rem; line-height: 1.4; }
.table-responsive { overflow-x: auto; margin-top: 2rem; }
.table { width: 100%; border-collapse: collapse; }
.table th, .table td { padding: 0.75rem; text-align: left; }
.table th { background: rgba(11,12,16,0.6); color: var(--accent); position: sticky; top: 0; }
.table tr { background: var(--card-bg); border-bottom: 1px solid rgba(102,252,241,0.2); }
.table tr:nth-child(even) { background: rgba(11,12,16,0.9); }
.btn {
  display: inline-block; background: var(--accent); color: #0b0c10;
  padding: 0.6rem 1.2rem; border-radius: 8px; font-weight: bold;
  box-shadow: 0 2px 8px rgba(0, 255, 255, 0.3); transition: background 0.2s, transform 0.2s;
}
.btn:hover { background: #45e0d8; transform: translateY(-2px); }
.form-group { margin-bottom: 1rem; }
.form-group label { display: block; margin-bottom: 0.5rem; color: var(--accent); }
.form-group input, .form-group select {
  width: 100%; padding: 0.6rem; border: 1px solid rgba(102,252,241,0.3);
  border-radius: 6px; background: rgba(255,255,255,0.05); color: var(--text-light);
}
.form-group input:focus, .form-group select:focus {
  outline: none; border-color: var(--accent); box-shadow: 0 0 8px var(--accent);
}
.img-preview { margin-top: 0.5rem; width: 120px; height: 120px; object-fit: cover;
  border: 1px solid rgba(102,252,241,0.3); border-radius: 6px;
}
.grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(240px,1fr));
  gap: 1rem;
}
@media (max-width: 768px) {
  .header h1 { font-size: 1.5rem; }
  .stock-card img { height: 140px; }
}