/* ==========================================
   1. VARIABLES GLOBALES Y CONFIGURACIÓN
   ========================================== */
:root {
    --azul-uagro: #0b3771;    /* Color principal */
    --rojo-uagro: #c91522;    /* Color secundario */
    --rosa-acento: #f4c2c2;   /* Color terciario */
    --gris-fondo: #f4f7f6;
    --blanco: #ffffff;
    --gris-oscuro: #333333;
    --gris-medio: #666666;
    --gris-claro: #cccccc;
}

* {
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    background-color: var(--gris-fondo);
    color: var(--gris-oscuro);
}

/* ==========================================
   2. ESTRUCTURAS DE PÁGINA (Layouts)
   ========================================== */

/* Estructura para el Login */
.body-login {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-color: #f2f2f2; /* Mantiene el fondo original del login */
}

/* Estructura para el Dashboard y páginas internas */
.body-dashboard {
    display: flex;
    height: 100vh;
    overflow: hidden;
}

/* ==========================================
   3. ESTILOS COMPONENTES: LOGIN
   ========================================== */
.login-container {
    background: var(--blanco);
    width: 350px;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0px 5px 15px rgba(0,0,0,0.2);
    text-align: center;
}

.login-container .logo {
    width: 120px;
    margin-bottom: 20px;
}

.login-container .titulo {
    background: var(--azul-uagro);
    color: var(--blanco);
    padding: 10px;
    border-radius: 5px;
    margin-bottom: 20px;
}

.login-container input {
    width: 100%;
    padding: 10px;
    margin: 10px 0;
    border: 1px solid var(--gris-claro);
    border-radius: 5px;
    font-family: inherit;
}

.login-container button {
    width: 100%;
    padding: 10px;
    background: var(--azul-uagro);
    color: var(--blanco);
    border: none;
    border-radius: 5px;
    font-size: 16px;
    cursor: pointer;
    transition: background 0.3s ease;
}

.login-container button:hover {
    background: var(--rojo-uagro);
}

.login-container .error {
    color: var(--rojo-uagro);
    margin-top: 10px;
    font-size: 0.9rem;
}

/* ==========================================
   4. ESTILOS COMPONENTES: DASHBOARD (Y MÓDULOS)
   ========================================== */

/* Barra Lateral */
.sidebar {
    width: 260px;
    background-color: var(--azul-uagro);
    color: var(--blanco);
    display: flex;
    flex-direction: column;
    box-shadow: 2px 0 5px rgba(0,0,0,0.1);
}

.sidebar-header {
    padding: 25px;
    text-align: center;
    background: rgba(0,0,0,0.1);
    border-bottom: 2px solid var(--rojo-uagro);
}

.sidebar-menu {
    flex-grow: 1;
    padding: 20px 0;
}

.sidebar-menu a {
    padding: 15px 25px;
    color: rgba(255,255,255,0.8);
    text-decoration: none;
    display: flex;
    align-items: center;
    transition: 0.3s;
    border-left: 4px solid transparent;
}

.sidebar-menu a i {
    margin-right: 15px;
    width: 20px;
    text-align: center;
}

.sidebar-menu a:hover {
    background: rgba(255,255,255,0.1);
    color: var(--blanco);
    border-left: 4px solid var(--rojo-uagro);
}

/* Contenido Principal */
.main-content {
    flex-grow: 1;
    overflow-y: auto;
}

header {
    background: var(--blanco);
    padding: 15px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.user-info {
    font-weight: bold;
    color: var(--azul-uagro);
    display: flex;
    align-items: center;
}

.user-info i {
    font-size: 1.5rem;
    margin-right: 10px;
    color: var(--rojo-uagro);
}

.container {
    padding: 40px;
}

.welcome-section {
    background: linear-gradient(135deg, var(--azul-uagro), #1a4a8d);
    color: var(--blanco);
    padding: 30px;
    border-radius: 15px;
    margin-bottom: 30px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

/* Tarjetas */
.grid-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
}

.card {
    background: var(--blanco);
    padding: 25px;
    border-radius: 12px;
    text-align: center;
    transition: transform 0.3s, border-bottom 0.3s;
    text-decoration: none;
    color: var(--gris-oscuro);
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
    border-bottom: 4px solid var(--rosa-acento);
}

.card:hover {
    transform: translateY(-5px);
    border-bottom: 4px solid var(--rojo-uagro);
}

.card i {
    font-size: 2.5rem;
    color: var(--azul-uagro);
    margin-bottom: 15px;
    display: block;
}

.card h3 {
    margin: 10px 0;
    font-size: 1.2rem;
}

.card p {
    color: var(--gris-medio);
    font-size: 0.9rem;
}

.logout-btn {
    background: var(--rojo-uagro);
    color: var(--blanco);
    padding: 8px 15px;
    border-radius: 5px;
    text-decoration: none;
    font-size: 0.9rem;
}