/* =============================
   ESTILOS GENERALES
============================= */

body {
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Arial, sans-serif;
    background: #f5f5f5;
    color: #333;
}

/* =============================
   ENCABEZADO
============================= */

.main-header {
    width: 100%;
    background: white;
    padding: 20px 0;
    text-align: center;
    box-shadow: 0px 2px 8px rgba(0,0,0,0.1);
}

.main-header .logo {
    height: 70px;
    object-fit: contain;
}

/* =============================
   CONTENEDOR DEL LOGIN
============================= */

.login-container {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding-top: 50px;
}

.login-box {
    width: 380px;
    background: white;
    padding: 30px;
    border-radius: 14px;
    box-shadow: 0px 4px 14px rgba(0,0,0,0.15);
    text-align: center;
}

.login-box h2 {
    margin-bottom: 5px;
    font-size: 25px;
    font-weight: 600;
}

.subtitle {
    color: #555;
    font-size: 14px;
    margin-bottom: 20px;
}

/* =============================
   FORMULARIOS
============================= */

.form-group {
    text-align: left;
    margin-bottom: 18px;
}

.form-group label {
    font-size: 14px;
    font-weight: 600;
}

.form-group input {
    width: 100%;
    padding: 10px;
    border: 1px solid #bbb;
    border-radius: 6px;
    margin-top: 5px;
    font-size: 15px;
    transition: all .2s ease;
}

.form-group input:focus {
    border-color: #0d47a1;
    box-shadow: 0 0 6px rgba(13, 71, 161, .4);
    outline: none;
}

/* =============================
   BOTONES
============================= */

.btn-primary {
    background: #0d47a1;
    color: white;
    padding: 12px 16px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 15px;
    font-weight: 600;
    transition: background .3s ease, transform .1s;
}

.btn-primary:hover {
    background: #082d68;
}

.btn-primary:active {
    transform: scale(0.97);
}

.full {
    width: 100%;
}

/* =============================
   MENSAJE DE ERROR
============================= */

.error-box {
    background: #ffe3e3;
    color: #b30000;
    padding: 10px;
    border-left: 4px solid #b30000;
    margin-bottom: 18px;
    border-radius: 6px;
    text-align: left;
}

/* =============================
   ENLACES
============================= */

.back-link {
    margin-top: 15px;
}

.back-link a {
    text-decoration: none;
    color: #0d47a1;
}

.back-link a:hover {
    text-decoration: underline;
}

/* =============================
   FOOTER
============================= */

.footer {
    text-align: center;
    padding: 20px 0;
    margin-top: 40px;
    font-size: 13px;
    color: #777;
}