body {
    font-family: Arial, sans-serif;
    background-color: #f5f7fa;
    margin: 0;
    padding: 0;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: #2c3e50;
    padding: 15px;
}

.nav-left a {
    color: white;
    text-decoration: none;
    font-weight: bold;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 15px;
}

.nav-btn {
    margin: 0;
}

.nav-right .btn {
    background-color: #3498db;
    color: white;
    padding: 6px 12px;
    border-radius: 5px;
    text-decoration: none;
}

.nav-right .btn:hover {
    background-color: #2980b9;
}

.nav-user {
    color: white;
    font-weight: bold;
}

.flash-notice {
    background: #e8f7e8;
    color: #2d6a2d;
    padding: 10px 14px;
    border-radius: 8px;
    margin-bottom: 15px;
}

.flash-alert {
    background: #fdeaea;
    color: #a33a3a;
    padding: 10px 14px;
    border-radius: 8px;
    margin-bottom: 15px;
}

.error-box {
    background: #fdeaea;
    color: #a33a3a;
    padding: 10px 14px;
    border-radius: 8px;
    margin-bottom: 15px;
}

.container {
    width: 80%;
    margin: 30px auto;
}

.card {
    background: white;
    padding: 20px;
    margin-bottom: 15px;
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.card:hover {
    transform: translateY(-3px);
    transition: 0.2s;
}

.btn {
    display: inline-block;
    padding: 8px 12px;
    background-color: #3498db;
    color: white;
    border-radius: 10px;
    text-decoration: none;
}

.btn:hover {
    background-color: #2980b9;
}

.button-area {
    padding: 20px 0;
}

input, textarea {
    width: 100%;
    padding: 8px;
    margin-top: 5px;
    margin-bottom: 15px;
}

h1 {
    color: #333;
}

.category-container {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 10px;
}

.category-tag {
    background-color: #ecf0f1;
    color: #2c3e50;
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 14px;
    height: 30px;
    display: flex;
    align-items: center;
}