/* Estilos Generales */
body {
    margin: 0;
    display: flex;
    height: 100vh;
    font-family: 'Segoe UI', sans-serif;
    overflow: hidden; /* Evita scroll en el body */
    background-color: #f4f7f6;
}

/* Menú Lateral Fijo */
nav {
    width: 260px;
    background-color: #2c3e50;
    color: white;
    height: 100vh;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    box-shadow: 2px 0 5px rgba(0,0,0,0.1);
}

nav h3 {
    text-align: center;
    padding: 20px 10px;
    margin: 0;
    background-color: #1a252f;
    font-size: 1rem;
}

nav a {
    color: #bdc3c7;
    text-decoration: none;
    padding: 15px 25px;
    transition: all 0.3s;
    border-bottom: 1px solid #34495e;
    cursor: pointer;
}

nav a:hover, nav a.active {
    background-color: #34495e;
    color: white;
    padding-left: 35px;
}

/* Área Principal */
main {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    height: 100vh;
}

header {
    background-color: white;
    padding: 15px 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
    z-index: 10;
}

.content {
    padding: 30px;
    overflow-y: auto; /* Solo el contenido tiene scroll */
    flex-grow: 1;
}

/* Tablas y Formularios */
.data-table {
    width: 100%;
    border-collapse: collapse;
    background: white;
    margin-top: 20px;
}

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

.data-table th { background: #34495e; color: white; }

.login-container { height: 100vh; display: flex; justify-content: center; align-items: center; background: #e9ecef; }
.login-box { background: white; padding: 40px; border-radius: 10px; box-shadow: 0 4px 15px rgba(0,0,0,0.1); width: 350px; }
.logout-btn { color: #e74c3c; text-decoration: none; font-weight: bold; border: 1px solid #e74c3c; padding: 5px 15px; border-radius: 5px; }

/* Estilos para formularios dentro del SPA */
.form-card {
    background: white;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    max-width: 800px;
}

.form-group { margin-bottom: 15px; }
.form-group label { display: block; margin-bottom: 5px; font-weight: bold; color: #2c3e50; }

.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

input[type="text"], input[type="email"], input[type="password"] {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    box-sizing: border-box; /* Fundamental para que no se desborde */
}