/* css/styles.css */

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
header {
    background: rgba(255, 255, 255, 0.95);
    padding: 1.5rem;
    border-radius: 10px;
    margin-bottom: 2rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

header h1 {
    color: #2c3e50;
    text-align: center;
    margin-bottom: 1rem;
    font-size: 2.5rem;
}

nav {
    display: flex;
    justify-content: center;
    gap: 2rem;
}

.nav-link {
    text-decoration: none;
    color: #3498db;
    font-weight: 600;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    transition: all 0.3s ease;
}

.nav-link:hover, .nav-link.active {
    background: #3498db;
    color: white;
}

/* Main content */
main {
    flex: 1;
}

.form-container {
    background: rgba(255, 255, 255, 0.95);
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
    max-width: 600px;
    margin: 0 auto;
}

.form-container h2 {
    color: #2c3e50;
    text-align: center;
    margin-bottom: 2rem;
    font-size: 1.8rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: #2c3e50;
}

input[type="text"],
input[type="email"],
input[type="tel"],
input[type="number"],
select {
    width: 100%;
    padding: 0.8rem;
    border: 2px solid #ddd;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

input:focus,
select:focus {
    outline: none;
    border-color: #3498db;
    box-shadow: 0 0 5px rgba(52, 152, 219, 0.3);
}

.btn-submit,
.btn-reset {
    padding: 1rem 2rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-right: 1rem;
}

.btn-submit {
    background: #27ae60;
    color: white;
}

.btn-submit:hover {
    background: #229954;
    transform: translateY(-2px);
}

.btn-reset {
    background: #95a5a6;
    color: white;
}

.btn-reset:hover {
    background: #7f8c8d;
}

/* Mensajes */
.mensaje {
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    display: none;
}

.mensaje.exito {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
    display: block;
}

.mensaje.error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
    display: block;
}

.error {
    color: #e74c3c;
    font-size: 0.9rem;
    margin-top: 0.3rem;
    display: block;
}

/* Tabla de estudiantes */
.tabla-container {
    background: rgba(255, 255, 255, 0.95);
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
}

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

th {
    background: #3498db;
    color: white;
    font-weight: 600;
}

tr:hover {
    background: #f8f9fa;
}

/* Footer */
footer {
    background: rgba(255, 255, 255, 0.95);
    padding: 1rem;
    text-align: center;
    border-radius: 10px;
    margin-top: 2rem;
    color: #7f8c8d;
}

/* Responsive */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    header h1 {
        font-size: 2rem;
    }
    
    nav {
        flex-direction: column;
        gap: 1rem;
    }
    
    .form-container {
        padding: 1.5rem;
    }
    
    .btn-submit,
    .btn-reset {
        width: 100%;
        margin-right: 0;
        margin-bottom: 1rem;
    }
    
    table {
        font-size: 0.9rem;
    }
    
    th, td {
        padding: 0.5rem;
    }
}