*{ box-sizing: border-box; margin: 0; padding: 0; font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; }
body { background: #f4f7f6; color: #333; padding: 20px; }
.container { max-width: 900px; margin: 0 auto; }
header { text-align: center; margin-bottom: 30px; }
header h1 { color: #2c3e50; font-size: 2.2rem; }
.admin-link { display: inline-block; margin-top: 10px; color: #3498db; text-decoration: none; font-weight: bold; }
.card { background: #fff; padding: 25px; border-radius: 8px; margin-bottom: 25px; box-shadow: 0 4px 6px rgba(0,0,0,0.05); }
.card h2 { margin-bottom: 20px; color: #2980b9; border-bottom: 2px solid #ecf0f1; padding-bottom: 10px; font-size: 1.3rem; }
.form-group { margin-bottom: 20px; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
@media (max-width: 600px) { .grid-2 { grid-template-columns: 1fr; } }
label { display: block; font-weight: 600; margin-bottom: 8px; color: #34495e; }
input[type="text"], textarea { width: 100%; padding: 12px; border: 1px solid #bdc3c7; border-radius: 5px; font-size: 1rem; }
input[type="file"] { display: block; margin-bottom: 10px; }
.preview-img { display: none; max-width: 100%; height: 150px; object-fit: cover; border-radius: 5px; border: 1px solid #ddd; margin-top: 10px; }
.file-list { font-size: 0.9rem; color: #7f8c8d; margin-top: 10px; }
button { width: 100%; padding: 15px; background: #27ae60; color: white; border: none; border-radius: 5px; font-size: 1.2rem; cursor: pointer; font-weight: bold; transition: background 0.3s; }
button:hover { background: #219150; }
button:disabled { background: #95a5a6; cursor: not-allowed; }
#loading { text-align: center; margin-top: 15px; font-weight: bold; color: #e67e22; }
.hidden { display: none; }