/* Main Stylesheet for Boletin Gesel */
:root {
    --primary-color: #3498db;
    --secondary-color: #2c3e50;
    --success-color: #2ecc71;
    --danger-color: #e74c3c;
    --warning-color: #f39c12;
    --light-color: #ecf0f1;
    --dark-color: #34495e;
}

body {
    font-family: 'Arial', sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background-color: #f4f6f9;
    color: #333;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 15px;
}

/* Header */
header {
    background-color: var(--secondary-color);
    color: white;
    padding: 15px 0;
    border-bottom: 4px solid var(--primary-color);
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 24px;
    font-weight: bold;
}

/* Navigation */
nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
}

nav ul li {
    margin-left: 20px;
}

nav ul li a {
    color: white;
    text-decoration: none;
    transition: all 0.3s ease;
}

nav ul li a:hover {
    color: var(--primary-color);
}

/* Main Content */
main {
    padding: 20px 0;
}

.page-title {
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 10px;
    margin-bottom: 20px;
}

/* Cards */
.card {
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    margin-bottom: 20px;
    overflow: hidden;
}

.card-header {
    padding: 15px 20px;
    background-color: var(--light-color);
    border-bottom: 1px solid #ddd;
    font-weight: bold;
}

.card-body {
    padding: 20px;
}

/* Forms */
.form-group {
    margin-bottom: 15px;
}

label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
}

input[type="text"],
input[type="password"],
input[type="email"],
input[type="number"],
select,
textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 16px;
}

textarea {
    height: 100px;
    resize: vertical;
}

.btn {
    display: inline-block;
    padding: 10px 15px;
    border: none;
    border-radius: 4px;
    background-color: var(--primary-color);
    color: white;
    font-size: 16px;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.3s ease;
}

.btn:hover {
    opacity: 0.9;
}

.btn-success {
    background-color: var(--success-color);
}

.btn-danger {
    background-color: var(--danger-color);
}

.btn-warning {
    background-color: var(--warning-color);
}

/* Tables */
.table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 20px;
}

.table th,
.table td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid #ddd;
}

.table th {
    background-color: var(--light-color);
    font-weight: bold;
}

.table tr:hover {
    background-color: #f9f9f9;
}

/* Alerts */
.alert {
    padding: 15px;
    margin-bottom: 20px;
    border-radius: 4px;
}

.alert-success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-danger {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.alert-warning {
    background-color: #fff3cd;
    color: #856404;
    border: 1px solid #ffeeba;
}

/* Footer */
footer {
    background-color: var(--secondary-color);
    color: white;
    text-align: center;
    padding: 20px 0;
    margin-top: 40px;
}

/* Utilities */
.text-center {
    text-align: center;
}

.mt-3 {
    margin-top: 15px;
}

.mb-3 {
    margin-bottom: 15px;
}

/* Grade levels styling */
.grade-level {
    display: inline-block;
    padding: 5px 10px;
    border-radius: 4px;
    font-weight: bold;
}

.grade-a {
    background-color: #2ecc71;
    color: white;
}

.grade-b {
    background-color: #f39c12;
    color: white;
}

.grade-c {
    background-color: #e74c3c;
    color: white;
}

/* Responsive design */
@media (max-width: 768px) {
    header .container {
        flex-direction: column;
    }
    
    nav ul {
        margin-top: 15px;
    }
    
    nav ul li {
        margin-left: 10px;
        margin-right: 10px;
    }
}