:root {
    --centinela-blue: #16274B;
    --centinela-gold: #E2AA2F;
}

body {
    font-family: 'Poppins', sans-serif;
    background-color: #fff;
    overflow-x: hidden;
}

.login-container {
    min-height: 100vh;
}

.bg-image {
    background-image: url('https://images.unsplash.com/photo-1556761175-5973dc0f32e7?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80');
    background-size: cover;
    background-position: center;
    position: relative;
    min-height: 100vh;
}

.bg-overlay {
    position: absolute;
    top: 0; 
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(22, 39, 75, 0.95), rgba(22, 39, 75, 0.85));
}

.image-caption {
    position: absolute;
    bottom: 60px;
    left: 50px;
    color: #fff;
    z-index: 2;
    max-width: 80%;
    border-left: 5px solid var(--centinela-gold);
    padding-left: 20px;
}

.login-section {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px;
    background-color: #fcfcfc;
}

.login-wrapper {
    width: 100%;
    max-width: 420px;
}

.brand-logo {
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--centinela-blue);
    margin-bottom: 5px;
    display: block;
    letter-spacing: -1px;
}

.brand-subtitle {
    color: var(--centinela-gold);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 2px;
    font-size: 0.9rem;
}

.welcome-text {
    color: #6c757d;
    margin-top: 15px;
    margin-bottom: 35px;
    font-size: 0.95rem;
}

.form-control {
    border: 2px solid #eef0f3;
    background-color: #f8f9fa;
    border-radius: 8px;
    padding: 14px 15px;
    padding-left: 45px;
    font-size: 0.95rem;
    transition: all 0.3s;
}

.form-control:focus {
    background-color: #fff;
    border-color: var(--centinela-blue);
    box-shadow: 0 0 0 4px rgba(22, 39, 75, 0.1);
}

.input-group-text {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 4;
    background: none;
    border: none;
    color: var(--centinela-blue);
    font-size: 1.1rem;
    padding: 0;
}

.input-wrapper {
    position: relative;
    margin-bottom: 25px;
}

.btn-login {
    background-color: var(--centinela-blue);
    color: #fff;
    border: none;
    border-radius: 8px;
    padding: 14px;
    font-weight: 600;
    width: 100%;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: all 0.3s;
    margin-top: 10px;
}

.btn-login:hover {
    background-color: var(--centinela-gold);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(226, 170, 47, 0.4);
}

@media (max-width: 768px) {
    .bg-image { display: none; }
    .login-section { background-color: #fff; }
}