body { font-family: Arial, sans-serif; background-color: #FAF6F0; color: #4A3B32; margin: 0; padding: 10px; line-height: 1.4; -webkit-text-size-adjust: 100%; }
.container { width: 100%; max-width: 850px; margin: 15px auto; background: #FFFFFF; padding: 15px; border-radius: 12px; box-shadow: 0 4px 15px rgba(139, 115, 85, 0.1); box-sizing: border-box; }
h1, h2, h3 { color: #8B7355; text-align: center; font-size: 1.3rem; margin-top: 15px; }
input, select, textarea { width: 100%; max-width: 400px; display: block; margin: 10px auto; padding: 12px 14px; font-size: 16px; border: 1px solid #D9C3B0; border-radius: 8px; box-sizing: border-box; background-color: #FFF; }
button, .btn { background-color: #C88A65; color: white !important; padding: 12px 20px; border: none; border-radius: 8px; cursor: pointer; display: inline-block; text-align: center; text-decoration: none; font-weight: bold; font-size: 16px; margin: 8px 0; transition: background 0.2s ease; width: 100%; max-width: 400px; box-sizing: border-box; }
button:hover, .btn:hover { background-color: #e3731e !important; color: white !important; }
.btn-green { background-color: #2E7D32; } .btn-green:hover { background-color: #e3731e !important; }
.btn-red { background-color: #C62828; } .btn-red:hover { background-color: #e3731e !important; }
.btn-blue { background-color: #0288D1; } .btn-blue:hover { background-color: #e3731e !important; }
.btn-register { background-color: #8B7355; width: 100%; max-width: 400px; margin: 10px auto; display: block; } 
.btn-register:hover { background-color: #e3731e !important; }
.table-responsive {width: 100%; overflow-x: auto; -webkit-overflow-scrolling: touch;}
table { width: 100%; border-collapse: collapse; min-width: 500px; }
th, td { padding: 12px 10px; text-align: left; border-bottom: 1px solid #EFECE6; font-size: 15px; }
th { background-color: #F4EBE1; color: #8B7355; }
.nav { text-align: center; margin-bottom: 20px; background: #F4EBE1; padding: 10px; border-radius: 8px; display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; }
.nav a { margin: 0; color: #8B7355; text-decoration: none; font-weight: bold; padding: 8px 12px; border-radius: 6px; display: inline-block; font-size: 15px; }
.nav a:hover { background: #EFECE6; color: #C88A65; }
.header-logo { text-align: center; margin-bottom: 15px; }
.header-logo img { max-width: 100%; height: auto; max-height: 140px; border-radius: 8px; }
.alert { padding: 12px; margin-bottom: 15px; border-radius: 6px; text-align: center; font-weight: bold; font-size: 15px; }
.alert-success { background-color: #E8F5E9; color: #2E7D32; }
.alert-error { background-color: #FFEBEE; color: #C62828; }
.footer { text-align: center; margin-top: 30px; padding: 15px 0; color: #8B7355; font-size: 14px; border-top: 1px solid #EFECE6; }
details { background: #F4EBE1; padding: 12px; border-radius: 8px; margin: 15px 0; }
summary { cursor: pointer; font-weight: bold; color: #8B7355; font-size: 16px; outline: none; }