* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

.login-container {
    background: white;
    max-width: 400px;
    margin: 100px auto;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}

.login-container h1 {
    text-align: center;
    margin-bottom: 30px;
    color: #333;
}

.login-container input,
.login-container select {
    width: 100%;
    padding: 12px;
    margin: 10px 0;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 16px;
}

.login-container button {
    width: 100%;
    padding: 12px;
    background: #667eea;
    color: white;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    cursor: pointer;
    margin-top: 10px;
}

.login-container button:hover {
    background: #5a67d8;
}

.error {
    color: #e53e3e;
    text-align: center;
    margin: 10px 0;
}

.success {
    color: #38a169;
    text-align: center;
    margin: 10px 0;
}

/* Header */
.header {
    background: white;
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.logout {
    color: rgb(243, 72, 72);
    text-decoration: none;
}

.logout:hover {
    text-decoration: underline;
}

/* Menu */
.menu {
    background: #4a5568;
    padding: 15px;
    display: flex;
    gap: 20px;
}

.menu a {
    color: white;
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 5px;
}

.menu a:hover {
    background: #2d3748;
}

.logout {
    float: right;
    color: red;
    background: rgba(255,255,255,0.2);
    padding: 8px 15px;
    border-radius: 5px;
    text-decoration: none;
    margin-top: 5px;
}
        
.logout:hover {
    background: rgba(255,255,255,0.3);
}

/* Container */
.container {
    max-width: 1200px;
    margin: 30px auto;
    padding: 0 20px;
}

/* Cursos Grid */
.cursos-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.curso-card {
    background: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.curso-card h3 {
    color: #2d3748;
    margin-bottom: 10px;
}

.curso-card a {
    display: inline-block;
    margin-top: 10px;
    color: #667eea;
    text-decoration: none;
}

.curso-card a:hover {
    text-decoration: underline;
}

/* Botones */
.btn {
    display: inline-block;
    background: #48bb78;
    color: white;
    padding: 10px 20px;
    border-radius: 5px;
    text-decoration: none;
    margin: 10px 0;
}

/* Tablas */
table {
    width: 100%;
    background: white;
    border-collapse: collapse;
    margin-top: 20px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    border-radius: 10px;
    overflow: hidden;
}

th, td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid #e2e8f0;
}

th {
    background: #4a5568;
    color: white;
}

tr:hover {
    background: #f7fafc;
}

.calificacion {
    background: #48bb78;
    color: white;
    padding: 5px 10px;
    border-radius: 15px;
    font-weight: bold;
}

.pendiente {
    background: #ecc94b;
    color: #744210;
    padding: 5px 10px;
    border-radius: 15px;
}