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

/* BODY */
body {
    background-color: #003300;
    font-family: Tahoma, Verdana, Arial, sans-serif;
    color: #000;
}

/* CONTENEDOR PRINCIPAL */
#contenedor {
    width: 900px;
    margin: 20px auto;
    background-color: #e9f5e9;
    border: 3px solid #004d00;
}

/* HEADER (el GIF ya va aquí, no gradiente) */
#header {
    height: 120px;
    background-color: #004d00; /* respaldo si no carga el gif */
    color: #ffffff;
    text-align: center;

    display: flex;
    flex-direction: column;
    justify-content: center;

    border-bottom: 3px solid #003300;
}

/* TEXTO HEADER */
#header h1 {
    font-size: 36px;
    text-shadow: 2px 2px 2px #000;
}

#header p {
    font-size: 14px;
    text-shadow: 1px 1px 2px #000;
}

/* MENU */
#menu {
    background: linear-gradient(to bottom, #00b300, #006600);
    border-bottom: 2px solid #003300;
}

.menu-principal {
    list-style: none;
    display: flex;
}

.menu-principal > li {
    position: relative;
}

.menu-principal > li > a {
    display: block;
    padding: 12px 18px;
    color: #ffffff;
    text-decoration: none;
    font-weight: bold;
}

.menu-principal > li > a:hover {
    background-color: #00cc66;
    color: #003300;
}

/* SUBMENUS */
.submenu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 160px;

    background: linear-gradient(to bottom, #ccffcc, #99cc99);
    list-style: none;

    border: 2px solid #006600;
}

.submenu li a {
    display: block;
    padding: 10px;
    color: #003300;
    text-decoration: none;
    font-size: 13px;
}

.submenu li a:hover {
    background-color: #66cc99;
}

/* MOSTRAR SUBMENU */
.menu-principal li:hover .submenu {
    display: block;
}

/* CONTENIDO */
#contenido {
    display: flex;
    padding: 15px;
}

/* SIDEBAR */
#sidebar {
    width: 200px;
    background: linear-gradient(to bottom, #e6ffe6, #b3e6b3);
    border: 2px solid #006600;
    padding: 10px;
    font-size: 13px;
}

#sidebar h3 {
    background: linear-gradient(to bottom, #009933, #006600);
    color: #ffffff;
    padding: 5px;
    margin-bottom: 8px;
    font-size: 14px;
    border: 1px solid #003300;
}

#sidebar ul {
    list-style: square;
    margin-left: 20px;
    margin-bottom: 15px;
}

#sidebar a {
    color: #004d00;
    text-decoration: none;
}

#sidebar a:hover {
    text-decoration: underline;
}

/* MAIN */
#main {
    flex: 1;
    margin-left: 15px;
    font-size: 14px;
}

#main h2 {
    color: #006600;
    margin-bottom: 10px;
    border-bottom: 1px solid #009933;
}

#main p,
#main ul {
    margin-bottom: 15px;
}

/* FOOTER */
#footer {
    background: linear-gradient(to bottom, #006600, #003300);
    color: #ffffff;
    text-align: center;
    padding: 10px;
    font-size: 12px;
    border-top: 3px solid #002200;
}