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

body {
    background: #f0f4f8;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Segoe UI', sans-serif;
    padding: 15px;
}

.login-card {
    background: #ffffff;
    border-radius: 12px;
    width: 100%;
    max-width: 420px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
    overflow: hidden;
}

.login-header {
    background: linear-gradient(135deg, #1a8fd1, #0d6eab);
    padding: 25px 20px;
    text-align: center;
}

.login-header h4 {
    color: #ffffff;
    font-weight: 600;
    font-size: clamp(13px, 3vw, 16px);
    margin: 0;
    letter-spacing: 0.5px;
}

.login-body {
    padding: clamp(20px, 5vw, 35px) clamp(20px, 6vw, 40px) 25px;
}

.logo-area {
    text-align: center;
    margin-bottom: 25px;
}

.logo-area img {
    width: clamp(55px, 15vw, 75px);
    height: clamp(55px, 15vw, 75px);
    object-fit: contain;
}

.logo-area p {
    color: #444;
    font-size: clamp(11px, 2.5vw, 13px);
    margin-top: 8px;
    font-weight: 500;
}

.form-label {
    color: #555;
    font-size: clamp(12px, 2.5vw, 13px);
    font-weight: 500;
    margin-bottom: 4px;
}

.form-control {
    background: #fff;
    border: none;
    border-bottom: 2px solid #1a8fd1;
    border-radius: 0;
    color: #333;
    padding: 8px 2px;
    font-size: clamp(13px, 2.5vw, 14px);
    box-shadow: none;
    width: 100%;
}

.form-control:focus {
    border-bottom: 2px solid #0d6eab;
    box-shadow: none;
    background: #fff;
    color: #333;
}

.form-control::placeholder {
    color: #aaa;
}

.btn-login {
    background: linear-gradient(135deg, #1a8fd1, #0d6eab);
    border: none;
    border-radius: 6px;
    padding: 12px;
    font-weight: 600;
    letter-spacing: 1px;
    font-size: clamp(12px, 2.5vw, 14px);
    transition: all 0.3s ease;
    width: 100%;
    color: white;
    margin-top: 10px;
    cursor: pointer;
}

.btn-login:hover {
    background: linear-gradient(135deg, #0d6eab, #0a5a8e);
    box-shadow: 0 6px 18px rgba(13, 110, 171, 0.4);
    color: white;
}

.footer-text {
    text-align: center;
    color: #aaa;
    font-size: 11px;
    margin-top: 20px;
    padding-bottom: 5px;
}

/* Pantallas pequeñas (móvil) */
@media (max-width: 480px) {
    body {
        align-items: flex-start;
        padding-top: 30px;
    }

    .login-card {
        border-radius: 10px;
        max-width: 100%;
    }

    .login-header {
        padding: 20px 15px;
    }

    .login-body {
        padding: 20px 20px 20px;
    }
}

/* Pantallas medianas (tablet) */
@media (min-width: 481px) and (max-width: 768px) {
    .login-card {
        max-width: 380px;
    }
}